1 /* 2 * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* 27 * This file is available under and governed by the GNU General Public 28 * License version 2 only, as published by the Free Software Foundation. 29 * However, the following notice accompanied the original version of this 30 * file: 31 * 32 * Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos 33 * 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions are met: 38 * 39 * * Redistributions of source code must retain the above copyright notice, 40 * this list of conditions and the following disclaimer. 41 * 42 * * Redistributions in binary form must reproduce the above copyright notice, 43 * this list of conditions and the following disclaimer in the documentation 44 * and/or other materials provided with the distribution. 45 * 46 * * Neither the name of JSR-310 nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 54 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 55 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 56 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 57 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 58 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 59 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 60 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61 */ 62 package java.time.format; 63 64 import static java.time.temporal.ChronoField.DAY_OF_MONTH; 65 import static java.time.temporal.ChronoField.HOUR_OF_DAY; 66 import static java.time.temporal.ChronoField.INSTANT_SECONDS; 67 import static java.time.temporal.ChronoField.MINUTE_OF_HOUR; 68 import static java.time.temporal.ChronoField.MONTH_OF_YEAR; 69 import static java.time.temporal.ChronoField.NANO_OF_SECOND; 70 import static java.time.temporal.ChronoField.OFFSET_SECONDS; 71 import static java.time.temporal.ChronoField.SECOND_OF_MINUTE; 72 import static java.time.temporal.ChronoField.YEAR; 73 import static java.time.temporal.ChronoField.ERA; 74 75 import java.lang.ref.SoftReference; 76 import java.math.BigDecimal; 77 import java.math.BigInteger; 78 import java.math.RoundingMode; 79 import java.text.ParsePosition; 80 import java.time.DateTimeException; 81 import java.time.Instant; 82 import java.time.LocalDate; 83 import java.time.LocalDateTime; 84 import java.time.LocalTime; 85 import java.time.ZoneId; 86 import java.time.ZoneOffset; 87 import java.time.chrono.ChronoLocalDate; 88 import java.time.chrono.ChronoLocalDateTime; 89 import java.time.chrono.Chronology; 90 import java.time.chrono.Era; 91 import java.time.chrono.IsoChronology; 92 import java.time.format.DateTimeTextProvider.LocaleStore; 93 import java.time.temporal.ChronoField; 94 import java.time.temporal.IsoFields; 95 import java.time.temporal.JulianFields; 96 import java.time.temporal.TemporalAccessor; 97 import java.time.temporal.TemporalField; 98 import java.time.temporal.TemporalQueries; 99 import java.time.temporal.TemporalQuery; 100 import java.time.temporal.ValueRange; 101 import java.time.temporal.WeekFields; 102 import java.time.zone.ZoneRulesProvider; 103 import java.util.AbstractMap.SimpleImmutableEntry; 104 import java.util.ArrayList; 105 import java.util.Arrays; 106 import java.util.Collections; 107 import java.util.Comparator; 108 import java.util.HashMap; 109 import java.util.HashSet; 110 import java.util.Iterator; 111 import java.util.LinkedHashMap; 112 import java.util.List; 113 import java.util.Locale; 114 import java.util.Map; 115 import java.util.Map.Entry; 116 import java.util.Objects; 117 import java.util.Set; 118 import java.util.TimeZone; 119 import java.util.concurrent.ConcurrentHashMap; 120 import java.util.concurrent.ConcurrentMap; 121 122 import sun.text.spi.JavaTimeDateTimePatternProvider; 123 import sun.util.locale.provider.CalendarDataUtility; 124 import sun.util.locale.provider.LocaleProviderAdapter; 125 import sun.util.locale.provider.LocaleResources; 126 import sun.util.locale.provider.TimeZoneNameUtility; 127 128 /** 129 * Builder to create date-time formatters. 130 * <p> 131 * This allows a {@code DateTimeFormatter} to be created. 132 * All date-time formatters are created ultimately using this builder. 133 * <p> 134 * The basic elements of date-time can all be added: 135 * <ul> 136 * <li>Value - a numeric value</li> 137 * <li>Fraction - a fractional value including the decimal place. Always use this when 138 * outputting fractions to ensure that the fraction is parsed correctly</li> 139 * <li>Text - the textual equivalent for the value</li> 140 * <li>OffsetId/Offset - the {@linkplain ZoneOffset zone offset}</li> 141 * <li>ZoneId - the {@linkplain ZoneId time-zone} id</li> 142 * <li>ZoneText - the name of the time-zone</li> 143 * <li>ChronologyId - the {@linkplain Chronology chronology} id</li> 144 * <li>ChronologyText - the name of the chronology</li> 145 * <li>Literal - a text literal</li> 146 * <li>Nested and Optional - formats can be nested or made optional</li> 147 * </ul> 148 * In addition, any of the elements may be decorated by padding, either with spaces or any other character. 149 * <p> 150 * Finally, a shorthand pattern, mostly compatible with {@code java.text.SimpleDateFormat SimpleDateFormat} 151 * can be used, see {@link #appendPattern(String)}. 152 * In practice, this simply parses the pattern and calls other methods on the builder. 153 * 154 * @implSpec 155 * This class is a mutable builder intended for use from a single thread. 156 * 157 * @since 1.8 158 */ 159 public final class DateTimeFormatterBuilder { 160 161 /** 162 * Query for a time-zone that is region-only. 163 */ 164 private static final TemporalQuery<ZoneId> QUERY_REGION_ONLY = (temporal) -> { 165 ZoneId zone = temporal.query(TemporalQueries.zoneId()); 166 return (zone != null && zone instanceof ZoneOffset == false ? zone : null); 167 }; 168 169 /** 170 * The currently active builder, used by the outermost builder. 171 */ 172 private DateTimeFormatterBuilder active = this; 173 /** 174 * The parent builder, null for the outermost builder. 175 */ 176 private final DateTimeFormatterBuilder parent; 177 /** 178 * The list of printers that will be used. 179 */ 180 private final List<DateTimePrinterParser> printerParsers = new ArrayList<>(); 181 /** 182 * Whether this builder produces an optional formatter. 183 */ 184 private final boolean optional; 185 /** 186 * The width to pad the next field to. 187 */ 188 private int padNextWidth; 189 /** 190 * The character to pad the next field with. 191 */ 192 private char padNextChar; 193 /** 194 * The index of the last variable width value parser. 195 */ 196 private int valueParserIndex = -1; 197 198 /** 199 * Gets the formatting pattern for date and time styles for a locale and chronology. 200 * The locale and chronology are used to lookup the locale specific format 201 * for the requested dateStyle and/or timeStyle. 202 * <p> 203 * If the locale contains the "rg" (region override) 204 * <a href="../../util/Locale.html#def_locale_extension">Unicode extensions</a>, 205 * the formatting pattern is overridden with the one appropriate for the region. 206 * 207 * @param dateStyle the FormatStyle for the date, null for time-only pattern 208 * @param timeStyle the FormatStyle for the time, null for date-only pattern 209 * @param chrono the Chronology, non-null 210 * @param locale the locale, non-null 211 * @return the locale and Chronology specific formatting pattern 212 * @throws IllegalArgumentException if both dateStyle and timeStyle are null 213 */ 214 public static String getLocalizedDateTimePattern(FormatStyle dateStyle, FormatStyle timeStyle, 215 Chronology chrono, Locale locale) { 216 Objects.requireNonNull(locale, "locale"); 217 Objects.requireNonNull(chrono, "chrono"); 218 if (dateStyle == null && timeStyle == null) { 219 throw new IllegalArgumentException("Either dateStyle or timeStyle must be non-null"); 220 } 221 LocaleProviderAdapter adapter = LocaleProviderAdapter.getAdapter(JavaTimeDateTimePatternProvider.class, locale); 222 JavaTimeDateTimePatternProvider provider = adapter.getJavaTimeDateTimePatternProvider(); 223 String pattern = provider.getJavaTimeDateTimePattern(convertStyle(timeStyle), 224 convertStyle(dateStyle), chrono.getCalendarType(), 225 CalendarDataUtility.findRegionOverride(locale)); 226 return pattern; 227 } 228 229 /** 230 * Converts the given FormatStyle to the java.text.DateFormat style. 231 * 232 * @param style the FormatStyle style 233 * @return the int style, or -1 if style is null, indicating un-required 234 */ 235 private static int convertStyle(FormatStyle style) { 236 if (style == null) { 237 return -1; 238 } 239 return style.ordinal(); // indices happen to align 240 } 241 242 /** 243 * Constructs a new instance of the builder. 244 */ 245 public DateTimeFormatterBuilder() { 246 super(); 247 parent = null; 248 optional = false; 249 } 250 251 /** 252 * Constructs a new instance of the builder. 253 * 254 * @param parent the parent builder, not null 255 * @param optional whether the formatter is optional, not null 256 */ 257 private DateTimeFormatterBuilder(DateTimeFormatterBuilder parent, boolean optional) { 258 super(); 259 this.parent = parent; 260 this.optional = optional; 261 } 262 263 //----------------------------------------------------------------------- 264 /** 265 * Changes the parse style to be case sensitive for the remainder of the formatter. 266 * <p> 267 * Parsing can be case sensitive or insensitive - by default it is case sensitive. 268 * This method allows the case sensitivity setting of parsing to be changed. 269 * <p> 270 * Calling this method changes the state of the builder such that all 271 * subsequent builder method calls will parse text in case sensitive mode. 272 * See {@link #parseCaseInsensitive} for the opposite setting. 273 * The parse case sensitive/insensitive methods may be called at any point 274 * in the builder, thus the parser can swap between case parsing modes 275 * multiple times during the parse. 276 * <p> 277 * Since the default is case sensitive, this method should only be used after 278 * a previous call to {@code #parseCaseInsensitive}. 279 * 280 * @return this, for chaining, not null 281 */ 282 public DateTimeFormatterBuilder parseCaseSensitive() { 283 appendInternal(SettingsParser.SENSITIVE); 284 return this; 285 } 286 287 /** 288 * Changes the parse style to be case insensitive for the remainder of the formatter. 289 * <p> 290 * Parsing can be case sensitive or insensitive - by default it is case sensitive. 291 * This method allows the case sensitivity setting of parsing to be changed. 292 * <p> 293 * Calling this method changes the state of the builder such that all 294 * subsequent builder method calls will parse text in case insensitive mode. 295 * See {@link #parseCaseSensitive()} for the opposite setting. 296 * The parse case sensitive/insensitive methods may be called at any point 297 * in the builder, thus the parser can swap between case parsing modes 298 * multiple times during the parse. 299 * 300 * @return this, for chaining, not null 301 */ 302 public DateTimeFormatterBuilder parseCaseInsensitive() { 303 appendInternal(SettingsParser.INSENSITIVE); 304 return this; 305 } 306 307 //----------------------------------------------------------------------- 308 /** 309 * Changes the parse style to be strict for the remainder of the formatter. 310 * <p> 311 * Parsing can be strict or lenient - by default its strict. 312 * This controls the degree of flexibility in matching the text and sign styles. 313 * <p> 314 * When used, this method changes the parsing to be strict from this point onwards. 315 * As strict is the default, this is normally only needed after calling {@link #parseLenient()}. 316 * The change will remain in force until the end of the formatter that is eventually 317 * constructed or until {@code parseLenient} is called. 318 * 319 * @return this, for chaining, not null 320 */ 321 public DateTimeFormatterBuilder parseStrict() { 322 appendInternal(SettingsParser.STRICT); 323 return this; 324 } 325 326 /** 327 * Changes the parse style to be lenient for the remainder of the formatter. 328 * Note that case sensitivity is set separately to this method. 329 * <p> 330 * Parsing can be strict or lenient - by default its strict. 331 * This controls the degree of flexibility in matching the text and sign styles. 332 * Applications calling this method should typically also call {@link #parseCaseInsensitive()}. 333 * <p> 334 * When used, this method changes the parsing to be lenient from this point onwards. 335 * The change will remain in force until the end of the formatter that is eventually 336 * constructed or until {@code parseStrict} is called. 337 * 338 * @return this, for chaining, not null 339 */ 340 public DateTimeFormatterBuilder parseLenient() { 341 appendInternal(SettingsParser.LENIENT); 342 return this; 343 } 344 345 //----------------------------------------------------------------------- 346 /** 347 * Appends a default value for a field to the formatter for use in parsing. 348 * <p> 349 * This appends an instruction to the builder to inject a default value 350 * into the parsed result. This is especially useful in conjunction with 351 * optional parts of the formatter. 352 * <p> 353 * For example, consider a formatter that parses the year, followed by 354 * an optional month, with a further optional day-of-month. Using such a 355 * formatter would require the calling code to check whether a full date, 356 * year-month or just a year had been parsed. This method can be used to 357 * default the month and day-of-month to a sensible value, such as the 358 * first of the month, allowing the calling code to always get a date. 359 * <p> 360 * During formatting, this method has no effect. 361 * <p> 362 * During parsing, the current state of the parse is inspected. 363 * If the specified field has no associated value, because it has not been 364 * parsed successfully at that point, then the specified value is injected 365 * into the parse result. Injection is immediate, thus the field-value pair 366 * will be visible to any subsequent elements in the formatter. 367 * As such, this method is normally called at the end of the builder. 368 * 369 * @param field the field to default the value of, not null 370 * @param value the value to default the field to 371 * @return this, for chaining, not null 372 */ 373 public DateTimeFormatterBuilder parseDefaulting(TemporalField field, long value) { 374 Objects.requireNonNull(field, "field"); 375 appendInternal(new DefaultValueParser(field, value)); 376 return this; 377 } 378 379 //----------------------------------------------------------------------- 380 /** 381 * Appends the value of a date-time field to the formatter using a normal 382 * output style. 383 * <p> 384 * The value of the field will be output during a format. 385 * If the value cannot be obtained then an exception will be thrown. 386 * <p> 387 * The value will be printed as per the normal format of an integer value. 388 * Only negative numbers will be signed. No padding will be added. 389 * <p> 390 * The parser for a variable width value such as this normally behaves greedily, 391 * requiring one digit, but accepting as many digits as possible. 392 * This behavior can be affected by 'adjacent value parsing'. 393 * See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details. 394 * 395 * @param field the field to append, not null 396 * @return this, for chaining, not null 397 */ 398 public DateTimeFormatterBuilder appendValue(TemporalField field) { 399 Objects.requireNonNull(field, "field"); 400 appendValue(new NumberPrinterParser(field, 1, 19, SignStyle.NORMAL)); 401 return this; 402 } 403 404 /** 405 * Appends the value of a date-time field to the formatter using a fixed 406 * width, zero-padded approach. 407 * <p> 408 * The value of the field will be output during a format. 409 * If the value cannot be obtained then an exception will be thrown. 410 * <p> 411 * The value will be zero-padded on the left. If the size of the value 412 * means that it cannot be printed within the width then an exception is thrown. 413 * If the value of the field is negative then an exception is thrown during formatting. 414 * <p> 415 * This method supports a special technique of parsing known as 'adjacent value parsing'. 416 * This technique solves the problem where a value, variable or fixed width, is followed by one or more 417 * fixed length values. The standard parser is greedy, and thus it would normally 418 * steal the digits that are needed by the fixed width value parsers that follow the 419 * variable width one. 420 * <p> 421 * No action is required to initiate 'adjacent value parsing'. 422 * When a call to {@code appendValue} is made, the builder 423 * enters adjacent value parsing setup mode. If the immediately subsequent method 424 * call or calls on the same builder are for a fixed width value, then the parser will reserve 425 * space so that the fixed width values can be parsed. 426 * <p> 427 * For example, consider {@code builder.appendValue(YEAR).appendValue(MONTH_OF_YEAR, 2);} 428 * The year is a variable width parse of between 1 and 19 digits. 429 * The month is a fixed width parse of 2 digits. 430 * Because these were appended to the same builder immediately after one another, 431 * the year parser will reserve two digits for the month to parse. 432 * Thus, the text '201106' will correctly parse to a year of 2011 and a month of 6. 433 * Without adjacent value parsing, the year would greedily parse all six digits and leave 434 * nothing for the month. 435 * <p> 436 * Adjacent value parsing applies to each set of fixed width not-negative values in the parser 437 * that immediately follow any kind of value, variable or fixed width. 438 * Calling any other append method will end the setup of adjacent value parsing. 439 * Thus, in the unlikely event that you need to avoid adjacent value parsing behavior, 440 * simply add the {@code appendValue} to another {@code DateTimeFormatterBuilder} 441 * and add that to this builder. 442 * <p> 443 * If adjacent parsing is active, then parsing must match exactly the specified 444 * number of digits in both strict and lenient modes. 445 * In addition, no positive or negative sign is permitted. 446 * 447 * @param field the field to append, not null 448 * @param width the width of the printed field, from 1 to 19 449 * @return this, for chaining, not null 450 * @throws IllegalArgumentException if the width is invalid 451 */ 452 public DateTimeFormatterBuilder appendValue(TemporalField field, int width) { 453 Objects.requireNonNull(field, "field"); 454 if (width < 1 || width > 19) { 455 throw new IllegalArgumentException("The width must be from 1 to 19 inclusive but was " + width); 456 } 457 NumberPrinterParser pp = new NumberPrinterParser(field, width, width, SignStyle.NOT_NEGATIVE); 458 appendValue(pp); 459 return this; 460 } 461 462 /** 463 * Appends the value of a date-time field to the formatter providing full 464 * control over formatting. 465 * <p> 466 * The value of the field will be output during a format. 467 * If the value cannot be obtained then an exception will be thrown. 468 * <p> 469 * This method provides full control of the numeric formatting, including 470 * zero-padding and the positive/negative sign. 471 * <p> 472 * The parser for a variable width value such as this normally behaves greedily, 473 * accepting as many digits as possible. 474 * This behavior can be affected by 'adjacent value parsing'. 475 * See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details. 476 * <p> 477 * In strict parsing mode, the minimum number of parsed digits is {@code minWidth} 478 * and the maximum is {@code maxWidth}. 479 * In lenient parsing mode, the minimum number of parsed digits is one 480 * and the maximum is 19 (except as limited by adjacent value parsing). 481 * <p> 482 * If this method is invoked with equal minimum and maximum widths and a sign style of 483 * {@code NOT_NEGATIVE} then it delegates to {@code appendValue(TemporalField,int)}. 484 * In this scenario, the formatting and parsing behavior described there occur. 485 * 486 * @param field the field to append, not null 487 * @param minWidth the minimum field width of the printed field, from 1 to 19 488 * @param maxWidth the maximum field width of the printed field, from 1 to 19 489 * @param signStyle the positive/negative output style, not null 490 * @return this, for chaining, not null 491 * @throws IllegalArgumentException if the widths are invalid 492 */ 493 public DateTimeFormatterBuilder appendValue( 494 TemporalField field, int minWidth, int maxWidth, SignStyle signStyle) { 495 if (minWidth == maxWidth && signStyle == SignStyle.NOT_NEGATIVE) { 496 return appendValue(field, maxWidth); 497 } 498 Objects.requireNonNull(field, "field"); 499 Objects.requireNonNull(signStyle, "signStyle"); 500 if (minWidth < 1 || minWidth > 19) { 501 throw new IllegalArgumentException("The minimum width must be from 1 to 19 inclusive but was " + minWidth); 502 } 503 if (maxWidth < 1 || maxWidth > 19) { 504 throw new IllegalArgumentException("The maximum width must be from 1 to 19 inclusive but was " + maxWidth); 505 } 506 if (maxWidth < minWidth) { 507 throw new IllegalArgumentException("The maximum width must exceed or equal the minimum width but " + 508 maxWidth + " < " + minWidth); 509 } 510 NumberPrinterParser pp = new NumberPrinterParser(field, minWidth, maxWidth, signStyle); 511 appendValue(pp); 512 return this; 513 } 514 515 //----------------------------------------------------------------------- 516 /** 517 * Appends the reduced value of a date-time field to the formatter. 518 * <p> 519 * Since fields such as year vary by chronology, it is recommended to use the 520 * {@link #appendValueReduced(TemporalField, int, int, ChronoLocalDate)} date} 521 * variant of this method in most cases. This variant is suitable for 522 * simple fields or working with only the ISO chronology. 523 * <p> 524 * For formatting, the {@code width} and {@code maxWidth} are used to 525 * determine the number of characters to format. 526 * If they are equal then the format is fixed width. 527 * If the value of the field is within the range of the {@code baseValue} using 528 * {@code width} characters then the reduced value is formatted otherwise the value is 529 * truncated to fit {@code maxWidth}. 530 * The rightmost characters are output to match the width, left padding with zero. 531 * <p> 532 * For strict parsing, the number of characters allowed by {@code width} to {@code maxWidth} are parsed. 533 * For lenient parsing, the number of characters must be at least 1 and less than 10. 534 * If the number of digits parsed is equal to {@code width} and the value is positive, 535 * the value of the field is computed to be the first number greater than 536 * or equal to the {@code baseValue} with the same least significant characters, 537 * otherwise the value parsed is the field value. 538 * This allows a reduced value to be entered for values in range of the baseValue 539 * and width and absolute values can be entered for values outside the range. 540 * <p> 541 * For example, a base value of {@code 1980} and a width of {@code 2} will have 542 * valid values from {@code 1980} to {@code 2079}. 543 * During parsing, the text {@code "12"} will result in the value {@code 2012} as that 544 * is the value within the range where the last two characters are "12". 545 * By contrast, parsing the text {@code "1915"} will result in the value {@code 1915}. 546 * 547 * @param field the field to append, not null 548 * @param width the field width of the printed and parsed field, from 1 to 10 549 * @param maxWidth the maximum field width of the printed field, from 1 to 10 550 * @param baseValue the base value of the range of valid values 551 * @return this, for chaining, not null 552 * @throws IllegalArgumentException if the width or base value is invalid 553 */ 554 public DateTimeFormatterBuilder appendValueReduced(TemporalField field, 555 int width, int maxWidth, int baseValue) { 556 Objects.requireNonNull(field, "field"); 557 ReducedPrinterParser pp = new ReducedPrinterParser(field, width, maxWidth, baseValue, null); 558 appendValue(pp); 559 return this; 560 } 561 562 /** 563 * Appends the reduced value of a date-time field to the formatter. 564 * <p> 565 * This is typically used for formatting and parsing a two digit year. 566 * <p> 567 * The base date is used to calculate the full value during parsing. 568 * For example, if the base date is 1950-01-01 then parsed values for 569 * a two digit year parse will be in the range 1950-01-01 to 2049-12-31. 570 * Only the year would be extracted from the date, thus a base date of 571 * 1950-08-25 would also parse to the range 1950-01-01 to 2049-12-31. 572 * This behavior is necessary to support fields such as week-based-year 573 * or other calendar systems where the parsed value does not align with 574 * standard ISO years. 575 * <p> 576 * The exact behavior is as follows. Parse the full set of fields and 577 * determine the effective chronology using the last chronology if 578 * it appears more than once. Then convert the base date to the 579 * effective chronology. Then extract the specified field from the 580 * chronology-specific base date and use it to determine the 581 * {@code baseValue} used below. 582 * <p> 583 * For formatting, the {@code width} and {@code maxWidth} are used to 584 * determine the number of characters to format. 585 * If they are equal then the format is fixed width. 586 * If the value of the field is within the range of the {@code baseValue} using 587 * {@code width} characters then the reduced value is formatted otherwise the value is 588 * truncated to fit {@code maxWidth}. 589 * The rightmost characters are output to match the width, left padding with zero. 590 * <p> 591 * For strict parsing, the number of characters allowed by {@code width} to {@code maxWidth} are parsed. 592 * For lenient parsing, the number of characters must be at least 1 and less than 10. 593 * If the number of digits parsed is equal to {@code width} and the value is positive, 594 * the value of the field is computed to be the first number greater than 595 * or equal to the {@code baseValue} with the same least significant characters, 596 * otherwise the value parsed is the field value. 597 * This allows a reduced value to be entered for values in range of the baseValue 598 * and width and absolute values can be entered for values outside the range. 599 * <p> 600 * For example, a base value of {@code 1980} and a width of {@code 2} will have 601 * valid values from {@code 1980} to {@code 2079}. 602 * During parsing, the text {@code "12"} will result in the value {@code 2012} as that 603 * is the value within the range where the last two characters are "12". 604 * By contrast, parsing the text {@code "1915"} will result in the value {@code 1915}. 605 * 606 * @param field the field to append, not null 607 * @param width the field width of the printed and parsed field, from 1 to 10 608 * @param maxWidth the maximum field width of the printed field, from 1 to 10 609 * @param baseDate the base date used to calculate the base value for the range 610 * of valid values in the parsed chronology, not null 611 * @return this, for chaining, not null 612 * @throws IllegalArgumentException if the width or base value is invalid 613 */ 614 public DateTimeFormatterBuilder appendValueReduced( 615 TemporalField field, int width, int maxWidth, ChronoLocalDate baseDate) { 616 Objects.requireNonNull(field, "field"); 617 Objects.requireNonNull(baseDate, "baseDate"); 618 ReducedPrinterParser pp = new ReducedPrinterParser(field, width, maxWidth, 0, baseDate); 619 appendValue(pp); 620 return this; 621 } 622 623 /** 624 * Appends a fixed or variable width printer-parser handling adjacent value mode. 625 * If a PrinterParser is not active then the new PrinterParser becomes 626 * the active PrinterParser. 627 * Otherwise, the active PrinterParser is modified depending on the new PrinterParser. 628 * If the new PrinterParser is fixed width and has sign style {@code NOT_NEGATIVE} 629 * then its width is added to the active PP and 630 * the new PrinterParser is forced to be fixed width. 631 * If the new PrinterParser is variable width, the active PrinterParser is changed 632 * to be fixed width and the new PrinterParser becomes the active PP. 633 * 634 * @param pp the printer-parser, not null 635 * @return this, for chaining, not null 636 */ 637 private DateTimeFormatterBuilder appendValue(NumberPrinterParser pp) { 638 if (active.valueParserIndex >= 0) { 639 final int activeValueParser = active.valueParserIndex; 640 641 // adjacent parsing mode, update setting in previous parsers 642 NumberPrinterParser basePP = (NumberPrinterParser) active.printerParsers.get(activeValueParser); 643 if (pp.minWidth == pp.maxWidth && pp.signStyle == SignStyle.NOT_NEGATIVE) { 644 // Append the width to the subsequentWidth of the active parser 645 basePP = basePP.withSubsequentWidth(pp.maxWidth); 646 // Append the new parser as a fixed width 647 appendInternal(pp.withFixedWidth()); 648 // Retain the previous active parser 649 active.valueParserIndex = activeValueParser; 650 } else { 651 // Modify the active parser to be fixed width 652 basePP = basePP.withFixedWidth(); 653 // The new parser becomes the mew active parser 654 active.valueParserIndex = appendInternal(pp); 655 } 656 // Replace the modified parser with the updated one 657 active.printerParsers.set(activeValueParser, basePP); 658 } else { 659 // The new Parser becomes the active parser 660 active.valueParserIndex = appendInternal(pp); 661 } 662 return this; 663 } 664 665 //----------------------------------------------------------------------- 666 /** 667 * Appends the fractional value of a date-time field to the formatter. 668 * <p> 669 * The fractional value of the field will be output including the 670 * preceding decimal point. The preceding value is not output. 671 * For example, the second-of-minute value of 15 would be output as {@code .25}. 672 * <p> 673 * The width of the printed fraction can be controlled. Setting the 674 * minimum width to zero will cause no output to be generated. 675 * The printed fraction will have the minimum width necessary between 676 * the minimum and maximum widths - trailing zeroes are omitted. 677 * No rounding occurs due to the maximum width - digits are simply dropped. 678 * <p> 679 * When parsing in strict mode, the number of parsed digits must be between 680 * the minimum and maximum width. In strict mode, if the minimum and maximum widths 681 * are equal and there is no decimal point then the parser will 682 * participate in adjacent value parsing, see 683 * {@link appendValue(java.time.temporal.TemporalField, int)}. When parsing in lenient mode, 684 * the minimum width is considered to be zero and the maximum is nine. 685 * <p> 686 * If the value cannot be obtained then an exception will be thrown. 687 * If the value is negative an exception will be thrown. 688 * If the field does not have a fixed set of valid values then an 689 * exception will be thrown. 690 * If the field value in the date-time to be printed is invalid it 691 * cannot be printed and an exception will be thrown. 692 * 693 * @param field the field to append, not null 694 * @param minWidth the minimum width of the field excluding the decimal point, from 0 to 9 695 * @param maxWidth the maximum width of the field excluding the decimal point, from 1 to 9 696 * @param decimalPoint whether to output the localized decimal point symbol 697 * @return this, for chaining, not null 698 * @throws IllegalArgumentException if the field has a variable set of valid values or 699 * either width is invalid 700 */ 701 public DateTimeFormatterBuilder appendFraction( 702 TemporalField field, int minWidth, int maxWidth, boolean decimalPoint) { 703 if (minWidth == maxWidth && decimalPoint == false) { 704 // adjacent parsing 705 appendValue(new FractionPrinterParser(field, minWidth, maxWidth, decimalPoint)); 706 } else { 707 appendInternal(new FractionPrinterParser(field, minWidth, maxWidth, decimalPoint)); 708 } 709 return this; 710 } 711 712 //----------------------------------------------------------------------- 713 /** 714 * Appends the text of a date-time field to the formatter using the full 715 * text style. 716 * <p> 717 * The text of the field will be output during a format. 718 * The value must be within the valid range of the field. 719 * If the value cannot be obtained then an exception will be thrown. 720 * If the field has no textual representation, then the numeric value will be used. 721 * <p> 722 * The value will be printed as per the normal format of an integer value. 723 * Only negative numbers will be signed. No padding will be added. 724 * 725 * @param field the field to append, not null 726 * @return this, for chaining, not null 727 */ 728 public DateTimeFormatterBuilder appendText(TemporalField field) { 729 return appendText(field, TextStyle.FULL); 730 } 731 732 /** 733 * Appends the text of a date-time field to the formatter. 734 * <p> 735 * The text of the field will be output during a format. 736 * The value must be within the valid range of the field. 737 * If the value cannot be obtained then an exception will be thrown. 738 * If the field has no textual representation, then the numeric value will be used. 739 * <p> 740 * The value will be printed as per the normal format of an integer value. 741 * Only negative numbers will be signed. No padding will be added. 742 * 743 * @param field the field to append, not null 744 * @param textStyle the text style to use, not null 745 * @return this, for chaining, not null 746 */ 747 public DateTimeFormatterBuilder appendText(TemporalField field, TextStyle textStyle) { 748 Objects.requireNonNull(field, "field"); 749 Objects.requireNonNull(textStyle, "textStyle"); 750 appendInternal(new TextPrinterParser(field, textStyle, DateTimeTextProvider.getInstance())); 751 return this; 752 } 753 754 /** 755 * Appends the text of a date-time field to the formatter using the specified 756 * map to supply the text. 757 * <p> 758 * The standard text outputting methods use the localized text in the JDK. 759 * This method allows that text to be specified directly. 760 * The supplied map is not validated by the builder to ensure that formatting or 761 * parsing is possible, thus an invalid map may throw an error during later use. 762 * <p> 763 * Supplying the map of text provides considerable flexibility in formatting and parsing. 764 * For example, a legacy application might require or supply the months of the 765 * year as "JNY", "FBY", "MCH" etc. These do not match the standard set of text 766 * for localized month names. Using this method, a map can be created which 767 * defines the connection between each value and the text: 768 * <pre> 769 * Map<Long, String> map = new HashMap<>(); 770 * map.put(1L, "JNY"); 771 * map.put(2L, "FBY"); 772 * map.put(3L, "MCH"); 773 * ... 774 * builder.appendText(MONTH_OF_YEAR, map); 775 * </pre> 776 * <p> 777 * Other uses might be to output the value with a suffix, such as "1st", "2nd", "3rd", 778 * or as Roman numerals "I", "II", "III", "IV". 779 * <p> 780 * During formatting, the value is obtained and checked that it is in the valid range. 781 * If text is not available for the value then it is output as a number. 782 * During parsing, the parser will match against the map of text and numeric values. 783 * 784 * @param field the field to append, not null 785 * @param textLookup the map from the value to the text 786 * @return this, for chaining, not null 787 */ 788 public DateTimeFormatterBuilder appendText(TemporalField field, Map<Long, String> textLookup) { 789 Objects.requireNonNull(field, "field"); 790 Objects.requireNonNull(textLookup, "textLookup"); 791 Map<Long, String> copy = new LinkedHashMap<>(textLookup); 792 Map<TextStyle, Map<Long, String>> map = Collections.singletonMap(TextStyle.FULL, copy); 793 final LocaleStore store = new LocaleStore(map); 794 DateTimeTextProvider provider = new DateTimeTextProvider() { 795 @Override 796 public String getText(Chronology chrono, TemporalField field, 797 long value, TextStyle style, Locale locale) { 798 return store.getText(value, style); 799 } 800 @Override 801 public String getText(TemporalField field, long value, TextStyle style, Locale locale) { 802 return store.getText(value, style); 803 } 804 @Override 805 public Iterator<Entry<String, Long>> getTextIterator(TemporalField field, TextStyle style, Locale locale) { 806 return store.getTextIterator(style); 807 } 808 }; 809 appendInternal(new TextPrinterParser(field, TextStyle.FULL, provider)); 810 return this; 811 } 812 813 //----------------------------------------------------------------------- 814 /** 815 * Appends an instant using ISO-8601 to the formatter, formatting fractional 816 * digits in groups of three. 817 * <p> 818 * Instants have a fixed output format. 819 * They are converted to a date-time with a zone-offset of UTC and formatted 820 * using the standard ISO-8601 format. 821 * With this method, formatting nano-of-second outputs zero, three, six 822 * or nine digits as necessary. 823 * The localized decimal style is not used. 824 * <p> 825 * The instant is obtained using {@link ChronoField#INSTANT_SECONDS INSTANT_SECONDS} 826 * and optionally {@code NANO_OF_SECOND}. The value of {@code INSTANT_SECONDS} 827 * may be outside the maximum range of {@code LocalDateTime}. 828 * <p> 829 * The {@linkplain ResolverStyle resolver style} has no effect on instant parsing. 830 * The end-of-day time of '24:00' is handled as midnight at the start of the following day. 831 * The leap-second time of '23:59:59' is handled to some degree, see 832 * {@link DateTimeFormatter#parsedLeapSecond()} for full details. 833 * <p> 834 * An alternative to this method is to format/parse the instant as a single 835 * epoch-seconds value. That is achieved using {@code appendValue(INSTANT_SECONDS)}. 836 * 837 * @return this, for chaining, not null 838 */ 839 public DateTimeFormatterBuilder appendInstant() { 840 appendInternal(new InstantPrinterParser(-2)); 841 return this; 842 } 843 844 /** 845 * Appends an instant using ISO-8601 to the formatter with control over 846 * the number of fractional digits. 847 * <p> 848 * Instants have a fixed output format, although this method provides some 849 * control over the fractional digits. They are converted to a date-time 850 * with a zone-offset of UTC and printed using the standard ISO-8601 format. 851 * The localized decimal style is not used. 852 * <p> 853 * The {@code fractionalDigits} parameter allows the output of the fractional 854 * second to be controlled. Specifying zero will cause no fractional digits 855 * to be output. From 1 to 9 will output an increasing number of digits, using 856 * zero right-padding if necessary. The special value -1 is used to output as 857 * many digits as necessary to avoid any trailing zeroes. 858 * <p> 859 * When parsing in strict mode, the number of parsed digits must match the 860 * fractional digits. When parsing in lenient mode, any number of fractional 861 * digits from zero to nine are accepted. 862 * <p> 863 * The instant is obtained using {@link ChronoField#INSTANT_SECONDS INSTANT_SECONDS} 864 * and optionally {@code NANO_OF_SECOND}. The value of {@code INSTANT_SECONDS} 865 * may be outside the maximum range of {@code LocalDateTime}. 866 * <p> 867 * The {@linkplain ResolverStyle resolver style} has no effect on instant parsing. 868 * The end-of-day time of '24:00' is handled as midnight at the start of the following day. 869 * The leap-second time of '23:59:60' is handled to some degree, see 870 * {@link DateTimeFormatter#parsedLeapSecond()} for full details. 871 * <p> 872 * An alternative to this method is to format/parse the instant as a single 873 * epoch-seconds value. That is achieved using {@code appendValue(INSTANT_SECONDS)}. 874 * 875 * @param fractionalDigits the number of fractional second digits to format with, 876 * from 0 to 9, or -1 to use as many digits as necessary 877 * @return this, for chaining, not null 878 * @throws IllegalArgumentException if the number of fractional digits is invalid 879 */ 880 public DateTimeFormatterBuilder appendInstant(int fractionalDigits) { 881 if (fractionalDigits < -1 || fractionalDigits > 9) { 882 throw new IllegalArgumentException("The fractional digits must be from -1 to 9 inclusive but was " + fractionalDigits); 883 } 884 appendInternal(new InstantPrinterParser(fractionalDigits)); 885 return this; 886 } 887 888 //----------------------------------------------------------------------- 889 /** 890 * Appends the zone offset, such as '+01:00', to the formatter. 891 * <p> 892 * This appends an instruction to format/parse the offset ID to the builder. 893 * This is equivalent to calling {@code appendOffset("+HH:mm:ss", "Z")}. 894 * See {@link #appendOffset(String, String)} for details on formatting 895 * and parsing. 896 * 897 * @return this, for chaining, not null 898 */ 899 public DateTimeFormatterBuilder appendOffsetId() { 900 appendInternal(OffsetIdPrinterParser.INSTANCE_ID_Z); 901 return this; 902 } 903 904 /** 905 * Appends the zone offset, such as '+01:00', to the formatter. 906 * <p> 907 * This appends an instruction to format/parse the offset ID to the builder. 908 * <p> 909 * During formatting, the offset is obtained using a mechanism equivalent 910 * to querying the temporal with {@link TemporalQueries#offset()}. 911 * It will be printed using the format defined below. 912 * If the offset cannot be obtained then an exception is thrown unless the 913 * section of the formatter is optional. 914 * <p> 915 * When parsing in strict mode, the input must contain the mandatory 916 * and optional elements are defined by the specified pattern. 917 * If the offset cannot be parsed then an exception is thrown unless 918 * the section of the formatter is optional. 919 * <p> 920 * When parsing in lenient mode, only the hours are mandatory - minutes 921 * and seconds are optional. The colons are required if the specified 922 * pattern contains a colon. If the specified pattern is "+HH", the 923 * presence of colons is determined by whether the character after the 924 * hour digits is a colon or not. 925 * If the offset cannot be parsed then an exception is thrown unless 926 * the section of the formatter is optional. 927 * <p> 928 * The format of the offset is controlled by a pattern which must be one 929 * of the following: 930 * <ul> 931 * <li>{@code +HH} - hour only, ignoring minute and second 932 * <li>{@code +HHmm} - hour, with minute if non-zero, ignoring second, no colon 933 * <li>{@code +HH:mm} - hour, with minute if non-zero, ignoring second, with colon 934 * <li>{@code +HHMM} - hour and minute, ignoring second, no colon 935 * <li>{@code +HH:MM} - hour and minute, ignoring second, with colon 936 * <li>{@code +HHMMss} - hour and minute, with second if non-zero, no colon 937 * <li>{@code +HH:MM:ss} - hour and minute, with second if non-zero, with colon 938 * <li>{@code +HHMMSS} - hour, minute and second, no colon 939 * <li>{@code +HH:MM:SS} - hour, minute and second, with colon 940 * <li>{@code +HHmmss} - hour, with minute if non-zero or with minute and 941 * second if non-zero, no colon 942 * <li>{@code +HH:mm:ss} - hour, with minute if non-zero or with minute and 943 * second if non-zero, with colon 944 * <li>{@code +H} - hour only, ignoring minute and second 945 * <li>{@code +Hmm} - hour, with minute if non-zero, ignoring second, no colon 946 * <li>{@code +H:mm} - hour, with minute if non-zero, ignoring second, with colon 947 * <li>{@code +HMM} - hour and minute, ignoring second, no colon 948 * <li>{@code +H:MM} - hour and minute, ignoring second, with colon 949 * <li>{@code +HMMss} - hour and minute, with second if non-zero, no colon 950 * <li>{@code +H:MM:ss} - hour and minute, with second if non-zero, with colon 951 * <li>{@code +HMMSS} - hour, minute and second, no colon 952 * <li>{@code +H:MM:SS} - hour, minute and second, with colon 953 * <li>{@code +Hmmss} - hour, with minute if non-zero or with minute and 954 * second if non-zero, no colon 955 * <li>{@code +H:mm:ss} - hour, with minute if non-zero or with minute and 956 * second if non-zero, with colon 957 * </ul> 958 * Patterns containing "HH" will format and parse a two digit hour, 959 * zero-padded if necessary. Patterns containing "H" will format with no 960 * zero-padding, and parse either one or two digits. 961 * In lenient mode, the parser will be greedy and parse the maximum digits possible. 962 * The "no offset" text controls what text is printed when the total amount of 963 * the offset fields to be output is zero. 964 * Example values would be 'Z', '+00:00', 'UTC' or 'GMT'. 965 * Three formats are accepted for parsing UTC - the "no offset" text, and the 966 * plus and minus versions of zero defined by the pattern. 967 * 968 * @param pattern the pattern to use, not null 969 * @param noOffsetText the text to use when the offset is zero, not null 970 * @return this, for chaining, not null 971 * @throws IllegalArgumentException if the pattern is invalid 972 */ 973 public DateTimeFormatterBuilder appendOffset(String pattern, String noOffsetText) { 974 appendInternal(new OffsetIdPrinterParser(pattern, noOffsetText)); 975 return this; 976 } 977 978 /** 979 * Appends the localized zone offset, such as 'GMT+01:00', to the formatter. 980 * <p> 981 * This appends a localized zone offset to the builder, the format of the 982 * localized offset is controlled by the specified {@link FormatStyle style} 983 * to this method: 984 * <ul> 985 * <li>{@link TextStyle#FULL full} - formats with localized offset text, such 986 * as 'GMT, 2-digit hour and minute field, optional second field if non-zero, 987 * and colon. 988 * <li>{@link TextStyle#SHORT short} - formats with localized offset text, 989 * such as 'GMT, hour without leading zero, optional 2-digit minute and 990 * second if non-zero, and colon. 991 * </ul> 992 * <p> 993 * During formatting, the offset is obtained using a mechanism equivalent 994 * to querying the temporal with {@link TemporalQueries#offset()}. 995 * If the offset cannot be obtained then an exception is thrown unless the 996 * section of the formatter is optional. 997 * <p> 998 * During parsing, the offset is parsed using the format defined above. 999 * If the offset cannot be parsed then an exception is thrown unless the 1000 * section of the formatter is optional. 1001 * 1002 * @param style the format style to use, not null 1003 * @return this, for chaining, not null 1004 * @throws IllegalArgumentException if style is neither {@link TextStyle#FULL 1005 * full} nor {@link TextStyle#SHORT short} 1006 */ 1007 public DateTimeFormatterBuilder appendLocalizedOffset(TextStyle style) { 1008 Objects.requireNonNull(style, "style"); 1009 if (style != TextStyle.FULL && style != TextStyle.SHORT) { 1010 throw new IllegalArgumentException("Style must be either full or short"); 1011 } 1012 appendInternal(new LocalizedOffsetIdPrinterParser(style)); 1013 return this; 1014 } 1015 1016 //----------------------------------------------------------------------- 1017 /** 1018 * Appends the time-zone ID, such as 'Europe/Paris' or '+02:00', to the formatter. 1019 * <p> 1020 * This appends an instruction to format/parse the zone ID to the builder. 1021 * The zone ID is obtained in a strict manner suitable for {@code ZonedDateTime}. 1022 * By contrast, {@code OffsetDateTime} does not have a zone ID suitable 1023 * for use with this method, see {@link #appendZoneOrOffsetId()}. 1024 * <p> 1025 * During formatting, the zone is obtained using a mechanism equivalent 1026 * to querying the temporal with {@link TemporalQueries#zoneId()}. 1027 * It will be printed using the result of {@link ZoneId#getId()}. 1028 * If the zone cannot be obtained then an exception is thrown unless the 1029 * section of the formatter is optional. 1030 * <p> 1031 * During parsing, the text must match a known zone or offset. 1032 * There are two types of zone ID, offset-based, such as '+01:30' and 1033 * region-based, such as 'Europe/London'. These are parsed differently. 1034 * If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser 1035 * expects an offset-based zone and will not match region-based zones. 1036 * The offset ID, such as '+02:30', may be at the start of the parse, 1037 * or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is 1038 * equivalent to using {@link #appendOffset(String, String)} using the 1039 * arguments 'HH:MM:ss' and the no offset string '0'. 1040 * If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot 1041 * match a following offset ID, then {@link ZoneOffset#UTC} is selected. 1042 * In all other cases, the list of known region-based zones is used to 1043 * find the longest available match. If no match is found, and the parse 1044 * starts with 'Z', then {@code ZoneOffset.UTC} is selected. 1045 * The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting. 1046 * <p> 1047 * For example, the following will parse: 1048 * <pre> 1049 * "Europe/London" -- ZoneId.of("Europe/London") 1050 * "Z" -- ZoneOffset.UTC 1051 * "UT" -- ZoneId.of("UT") 1052 * "UTC" -- ZoneId.of("UTC") 1053 * "GMT" -- ZoneId.of("GMT") 1054 * "+01:30" -- ZoneOffset.of("+01:30") 1055 * "UT+01:30" -- ZoneOffset.of("+01:30") 1056 * "UTC+01:30" -- ZoneOffset.of("+01:30") 1057 * "GMT+01:30" -- ZoneOffset.of("+01:30") 1058 * </pre> 1059 * 1060 * @return this, for chaining, not null 1061 * @see #appendZoneRegionId() 1062 */ 1063 public DateTimeFormatterBuilder appendZoneId() { 1064 appendInternal(new ZoneIdPrinterParser(TemporalQueries.zoneId(), "ZoneId()")); 1065 return this; 1066 } 1067 1068 /** 1069 * Appends the time-zone region ID, such as 'Europe/Paris', to the formatter, 1070 * rejecting the zone ID if it is a {@code ZoneOffset}. 1071 * <p> 1072 * This appends an instruction to format/parse the zone ID to the builder 1073 * only if it is a region-based ID. 1074 * <p> 1075 * During formatting, the zone is obtained using a mechanism equivalent 1076 * to querying the temporal with {@link TemporalQueries#zoneId()}. 1077 * If the zone is a {@code ZoneOffset} or it cannot be obtained then 1078 * an exception is thrown unless the section of the formatter is optional. 1079 * If the zone is not an offset, then the zone will be printed using 1080 * the zone ID from {@link ZoneId#getId()}. 1081 * <p> 1082 * During parsing, the text must match a known zone or offset. 1083 * There are two types of zone ID, offset-based, such as '+01:30' and 1084 * region-based, such as 'Europe/London'. These are parsed differently. 1085 * If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser 1086 * expects an offset-based zone and will not match region-based zones. 1087 * The offset ID, such as '+02:30', may be at the start of the parse, 1088 * or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is 1089 * equivalent to using {@link #appendOffset(String, String)} using the 1090 * arguments 'HH:MM:ss' and the no offset string '0'. 1091 * If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot 1092 * match a following offset ID, then {@link ZoneOffset#UTC} is selected. 1093 * In all other cases, the list of known region-based zones is used to 1094 * find the longest available match. If no match is found, and the parse 1095 * starts with 'Z', then {@code ZoneOffset.UTC} is selected. 1096 * The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting. 1097 * <p> 1098 * For example, the following will parse: 1099 * <pre> 1100 * "Europe/London" -- ZoneId.of("Europe/London") 1101 * "Z" -- ZoneOffset.UTC 1102 * "UT" -- ZoneId.of("UT") 1103 * "UTC" -- ZoneId.of("UTC") 1104 * "GMT" -- ZoneId.of("GMT") 1105 * "+01:30" -- ZoneOffset.of("+01:30") 1106 * "UT+01:30" -- ZoneOffset.of("+01:30") 1107 * "UTC+01:30" -- ZoneOffset.of("+01:30") 1108 * "GMT+01:30" -- ZoneOffset.of("+01:30") 1109 * </pre> 1110 * <p> 1111 * Note that this method is identical to {@code appendZoneId()} except 1112 * in the mechanism used to obtain the zone. 1113 * Note also that parsing accepts offsets, whereas formatting will never 1114 * produce one. 1115 * 1116 * @return this, for chaining, not null 1117 * @see #appendZoneId() 1118 */ 1119 public DateTimeFormatterBuilder appendZoneRegionId() { 1120 appendInternal(new ZoneIdPrinterParser(QUERY_REGION_ONLY, "ZoneRegionId()")); 1121 return this; 1122 } 1123 1124 /** 1125 * Appends the time-zone ID, such as 'Europe/Paris' or '+02:00', to 1126 * the formatter, using the best available zone ID. 1127 * <p> 1128 * This appends an instruction to format/parse the best available 1129 * zone or offset ID to the builder. 1130 * The zone ID is obtained in a lenient manner that first attempts to 1131 * find a true zone ID, such as that on {@code ZonedDateTime}, and 1132 * then attempts to find an offset, such as that on {@code OffsetDateTime}. 1133 * <p> 1134 * During formatting, the zone is obtained using a mechanism equivalent 1135 * to querying the temporal with {@link TemporalQueries#zone()}. 1136 * It will be printed using the result of {@link ZoneId#getId()}. 1137 * If the zone cannot be obtained then an exception is thrown unless the 1138 * section of the formatter is optional. 1139 * <p> 1140 * During parsing, the text must match a known zone or offset. 1141 * There are two types of zone ID, offset-based, such as '+01:30' and 1142 * region-based, such as 'Europe/London'. These are parsed differently. 1143 * If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser 1144 * expects an offset-based zone and will not match region-based zones. 1145 * The offset ID, such as '+02:30', may be at the start of the parse, 1146 * or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is 1147 * equivalent to using {@link #appendOffset(String, String)} using the 1148 * arguments 'HH:MM:ss' and the no offset string '0'. 1149 * If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot 1150 * match a following offset ID, then {@link ZoneOffset#UTC} is selected. 1151 * In all other cases, the list of known region-based zones is used to 1152 * find the longest available match. If no match is found, and the parse 1153 * starts with 'Z', then {@code ZoneOffset.UTC} is selected. 1154 * The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting. 1155 * <p> 1156 * For example, the following will parse: 1157 * <pre> 1158 * "Europe/London" -- ZoneId.of("Europe/London") 1159 * "Z" -- ZoneOffset.UTC 1160 * "UT" -- ZoneId.of("UT") 1161 * "UTC" -- ZoneId.of("UTC") 1162 * "GMT" -- ZoneId.of("GMT") 1163 * "+01:30" -- ZoneOffset.of("+01:30") 1164 * "UT+01:30" -- ZoneOffset.of("UT+01:30") 1165 * "UTC+01:30" -- ZoneOffset.of("UTC+01:30") 1166 * "GMT+01:30" -- ZoneOffset.of("GMT+01:30") 1167 * </pre> 1168 * <p> 1169 * Note that this method is identical to {@code appendZoneId()} except 1170 * in the mechanism used to obtain the zone. 1171 * 1172 * @return this, for chaining, not null 1173 * @see #appendZoneId() 1174 */ 1175 public DateTimeFormatterBuilder appendZoneOrOffsetId() { 1176 appendInternal(new ZoneIdPrinterParser(TemporalQueries.zone(), "ZoneOrOffsetId()")); 1177 return this; 1178 } 1179 1180 /** 1181 * Appends the time-zone name, such as 'British Summer Time', to the formatter. 1182 * <p> 1183 * This appends an instruction to format/parse the textual name of the zone to 1184 * the builder. 1185 * <p> 1186 * During formatting, the zone is obtained using a mechanism equivalent 1187 * to querying the temporal with {@link TemporalQueries#zoneId()}. 1188 * If the zone is a {@code ZoneOffset} it will be printed using the 1189 * result of {@link ZoneOffset#getId()}. 1190 * If the zone is not an offset, the textual name will be looked up 1191 * for the locale set in the {@link DateTimeFormatter}. 1192 * If the temporal object being printed represents an instant, or if it is a 1193 * local date-time that is not in a daylight saving gap or overlap then 1194 * the text will be the summer or winter time text as appropriate. 1195 * If the lookup for text does not find any suitable result, then the 1196 * {@link ZoneId#getId() ID} will be printed. 1197 * If the zone cannot be obtained then an exception is thrown unless the 1198 * section of the formatter is optional. 1199 * <p> 1200 * During parsing, either the textual zone name, the zone ID or the offset 1201 * is accepted. Many textual zone names are not unique, such as CST can be 1202 * for both "Central Standard Time" and "China Standard Time". In this 1203 * situation, the zone id will be determined by the region information from 1204 * formatter's {@link DateTimeFormatter#getLocale() locale} and the standard 1205 * zone id for that area, for example, America/New_York for the America Eastern 1206 * zone. The {@link #appendZoneText(TextStyle, Set)} may be used 1207 * to specify a set of preferred {@link ZoneId} in this situation. 1208 * 1209 * @param textStyle the text style to use, not null 1210 * @return this, for chaining, not null 1211 */ 1212 public DateTimeFormatterBuilder appendZoneText(TextStyle textStyle) { 1213 appendInternal(new ZoneTextPrinterParser(textStyle, null, false)); 1214 return this; 1215 } 1216 1217 /** 1218 * Appends the time-zone name, such as 'British Summer Time', to the formatter. 1219 * <p> 1220 * This appends an instruction to format/parse the textual name of the zone to 1221 * the builder. 1222 * <p> 1223 * During formatting, the zone is obtained using a mechanism equivalent 1224 * to querying the temporal with {@link TemporalQueries#zoneId()}. 1225 * If the zone is a {@code ZoneOffset} it will be printed using the 1226 * result of {@link ZoneOffset#getId()}. 1227 * If the zone is not an offset, the textual name will be looked up 1228 * for the locale set in the {@link DateTimeFormatter}. 1229 * If the temporal object being printed represents an instant, or if it is a 1230 * local date-time that is not in a daylight saving gap or overlap, then the text 1231 * will be the summer or winter time text as appropriate. 1232 * If the lookup for text does not find any suitable result, then the 1233 * {@link ZoneId#getId() ID} will be printed. 1234 * If the zone cannot be obtained then an exception is thrown unless the 1235 * section of the formatter is optional. 1236 * <p> 1237 * During parsing, either the textual zone name, the zone ID or the offset 1238 * is accepted. Many textual zone names are not unique, such as CST can be 1239 * for both "Central Standard Time" and "China Standard Time". In this 1240 * situation, the zone id will be determined by the region information from 1241 * formatter's {@link DateTimeFormatter#getLocale() locale} and the standard 1242 * zone id for that area, for example, America/New_York for the America Eastern 1243 * zone. This method also allows a set of preferred {@link ZoneId} to be 1244 * specified for parsing. The matched preferred zone id will be used if the 1245 * textural zone name being parsed is not unique. 1246 * <p> 1247 * If the zone cannot be parsed then an exception is thrown unless the 1248 * section of the formatter is optional. 1249 * 1250 * @param textStyle the text style to use, not null 1251 * @param preferredZones the set of preferred zone ids, not null 1252 * @return this, for chaining, not null 1253 */ 1254 public DateTimeFormatterBuilder appendZoneText(TextStyle textStyle, 1255 Set<ZoneId> preferredZones) { 1256 Objects.requireNonNull(preferredZones, "preferredZones"); 1257 appendInternal(new ZoneTextPrinterParser(textStyle, preferredZones, false)); 1258 return this; 1259 } 1260 //---------------------------------------------------------------------- 1261 /** 1262 * Appends the generic time-zone name, such as 'Pacific Time', to the formatter. 1263 * <p> 1264 * This appends an instruction to format/parse the generic textual 1265 * name of the zone to the builder. The generic name is the same throughout the whole 1266 * year, ignoring any daylight saving changes. For example, 'Pacific Time' is the 1267 * generic name, whereas 'Pacific Standard Time' and 'Pacific Daylight Time' are the 1268 * specific names, see {@link #appendZoneText(TextStyle)}. 1269 * <p> 1270 * During formatting, the zone is obtained using a mechanism equivalent 1271 * to querying the temporal with {@link TemporalQueries#zoneId()}. 1272 * If the zone is a {@code ZoneOffset} it will be printed using the 1273 * result of {@link ZoneOffset#getId()}. 1274 * If the zone is not an offset, the textual name will be looked up 1275 * for the locale set in the {@link DateTimeFormatter}. 1276 * If the lookup for text does not find any suitable result, then the 1277 * {@link ZoneId#getId() ID} will be printed. 1278 * If the zone cannot be obtained then an exception is thrown unless the 1279 * section of the formatter is optional. 1280 * <p> 1281 * During parsing, either the textual zone name, the zone ID or the offset 1282 * is accepted. Many textual zone names are not unique, such as CST can be 1283 * for both "Central Standard Time" and "China Standard Time". In this 1284 * situation, the zone id will be determined by the region information from 1285 * formatter's {@link DateTimeFormatter#getLocale() locale} and the standard 1286 * zone id for that area, for example, America/New_York for the America Eastern zone. 1287 * The {@link #appendGenericZoneText(TextStyle, Set)} may be used 1288 * to specify a set of preferred {@link ZoneId} in this situation. 1289 * 1290 * @param textStyle the text style to use, not null 1291 * @return this, for chaining, not null 1292 * @since 9 1293 */ 1294 public DateTimeFormatterBuilder appendGenericZoneText(TextStyle textStyle) { 1295 appendInternal(new ZoneTextPrinterParser(textStyle, null, true)); 1296 return this; 1297 } 1298 1299 /** 1300 * Appends the generic time-zone name, such as 'Pacific Time', to the formatter. 1301 * <p> 1302 * This appends an instruction to format/parse the generic textual 1303 * name of the zone to the builder. The generic name is the same throughout the whole 1304 * year, ignoring any daylight saving changes. For example, 'Pacific Time' is the 1305 * generic name, whereas 'Pacific Standard Time' and 'Pacific Daylight Time' are the 1306 * specific names, see {@link #appendZoneText(TextStyle)}. 1307 * <p> 1308 * This method also allows a set of preferred {@link ZoneId} to be 1309 * specified for parsing. The matched preferred zone id will be used if the 1310 * textural zone name being parsed is not unique. 1311 * <p> 1312 * See {@link #appendGenericZoneText(TextStyle)} for details about 1313 * formatting and parsing. 1314 * 1315 * @param textStyle the text style to use, not null 1316 * @param preferredZones the set of preferred zone ids, not null 1317 * @return this, for chaining, not null 1318 * @since 9 1319 */ 1320 public DateTimeFormatterBuilder appendGenericZoneText(TextStyle textStyle, 1321 Set<ZoneId> preferredZones) { 1322 appendInternal(new ZoneTextPrinterParser(textStyle, preferredZones, true)); 1323 return this; 1324 } 1325 1326 //----------------------------------------------------------------------- 1327 /** 1328 * Appends the chronology ID, such as 'ISO' or 'ThaiBuddhist', to the formatter. 1329 * <p> 1330 * This appends an instruction to format/parse the chronology ID to the builder. 1331 * <p> 1332 * During formatting, the chronology is obtained using a mechanism equivalent 1333 * to querying the temporal with {@link TemporalQueries#chronology()}. 1334 * It will be printed using the result of {@link Chronology#getId()}. 1335 * If the chronology cannot be obtained then an exception is thrown unless the 1336 * section of the formatter is optional. 1337 * <p> 1338 * During parsing, the chronology is parsed and must match one of the chronologies 1339 * in {@link Chronology#getAvailableChronologies()}. 1340 * If the chronology cannot be parsed then an exception is thrown unless the 1341 * section of the formatter is optional. 1342 * The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting. 1343 * 1344 * @return this, for chaining, not null 1345 */ 1346 public DateTimeFormatterBuilder appendChronologyId() { 1347 appendInternal(new ChronoPrinterParser(null)); 1348 return this; 1349 } 1350 1351 /** 1352 * Appends the chronology name to the formatter. 1353 * <p> 1354 * The calendar system name will be output during a format. 1355 * If the chronology cannot be obtained then an exception will be thrown. 1356 * 1357 * @param textStyle the text style to use, not null 1358 * @return this, for chaining, not null 1359 */ 1360 public DateTimeFormatterBuilder appendChronologyText(TextStyle textStyle) { 1361 Objects.requireNonNull(textStyle, "textStyle"); 1362 appendInternal(new ChronoPrinterParser(textStyle)); 1363 return this; 1364 } 1365 1366 //----------------------------------------------------------------------- 1367 /** 1368 * Appends a localized date-time pattern to the formatter. 1369 * <p> 1370 * This appends a localized section to the builder, suitable for outputting 1371 * a date, time or date-time combination. The format of the localized 1372 * section is lazily looked up based on four items: 1373 * <ul> 1374 * <li>the {@code dateStyle} specified to this method 1375 * <li>the {@code timeStyle} specified to this method 1376 * <li>the {@code Locale} of the {@code DateTimeFormatter} 1377 * <li>the {@code Chronology}, selecting the best available 1378 * </ul> 1379 * During formatting, the chronology is obtained from the temporal object 1380 * being formatted, which may have been overridden by 1381 * {@link DateTimeFormatter#withChronology(Chronology)}. 1382 * The {@code FULL} and {@code LONG} styles typically require a time-zone. 1383 * When formatting using these styles, a {@code ZoneId} must be available, 1384 * either by using {@code ZonedDateTime} or {@link DateTimeFormatter#withZone}. 1385 * <p> 1386 * During parsing, if a chronology has already been parsed, then it is used. 1387 * Otherwise the default from {@code DateTimeFormatter.withChronology(Chronology)} 1388 * is used, with {@code IsoChronology} as the fallback. 1389 * <p> 1390 * Note that this method provides similar functionality to methods on 1391 * {@code DateFormat} such as {@link java.text.DateFormat#getDateTimeInstance(int, int)}. 1392 * 1393 * @param dateStyle the date style to use, null means no date required 1394 * @param timeStyle the time style to use, null means no time required 1395 * @return this, for chaining, not null 1396 * @throws IllegalArgumentException if both the date and time styles are null 1397 */ 1398 public DateTimeFormatterBuilder appendLocalized(FormatStyle dateStyle, FormatStyle timeStyle) { 1399 if (dateStyle == null && timeStyle == null) { 1400 throw new IllegalArgumentException("Either the date or time style must be non-null"); 1401 } 1402 appendInternal(new LocalizedPrinterParser(dateStyle, timeStyle)); 1403 return this; 1404 } 1405 1406 //----------------------------------------------------------------------- 1407 /** 1408 * Appends a character literal to the formatter. 1409 * <p> 1410 * This character will be output during a format. 1411 * 1412 * @param literal the literal to append, not null 1413 * @return this, for chaining, not null 1414 */ 1415 public DateTimeFormatterBuilder appendLiteral(char literal) { 1416 appendInternal(new CharLiteralPrinterParser(literal)); 1417 return this; 1418 } 1419 1420 /** 1421 * Appends a string literal to the formatter. 1422 * <p> 1423 * This string will be output during a format. 1424 * <p> 1425 * If the literal is empty, nothing is added to the formatter. 1426 * 1427 * @param literal the literal to append, not null 1428 * @return this, for chaining, not null 1429 */ 1430 public DateTimeFormatterBuilder appendLiteral(String literal) { 1431 Objects.requireNonNull(literal, "literal"); 1432 if (literal.length() > 0) { 1433 if (literal.length() == 1) { 1434 appendInternal(new CharLiteralPrinterParser(literal.charAt(0))); 1435 } else { 1436 appendInternal(new StringLiteralPrinterParser(literal)); 1437 } 1438 } 1439 return this; 1440 } 1441 1442 //----------------------------------------------------------------------- 1443 /** 1444 * Appends all the elements of a formatter to the builder. 1445 * <p> 1446 * This method has the same effect as appending each of the constituent 1447 * parts of the formatter directly to this builder. 1448 * 1449 * @param formatter the formatter to add, not null 1450 * @return this, for chaining, not null 1451 */ 1452 public DateTimeFormatterBuilder append(DateTimeFormatter formatter) { 1453 Objects.requireNonNull(formatter, "formatter"); 1454 appendInternal(formatter.toPrinterParser(false)); 1455 return this; 1456 } 1457 1458 /** 1459 * Appends a formatter to the builder which will optionally format/parse. 1460 * <p> 1461 * This method has the same effect as appending each of the constituent 1462 * parts directly to this builder surrounded by an {@link #optionalStart()} and 1463 * {@link #optionalEnd()}. 1464 * <p> 1465 * The formatter will format if data is available for all the fields contained within it. 1466 * The formatter will parse if the string matches, otherwise no error is returned. 1467 * 1468 * @param formatter the formatter to add, not null 1469 * @return this, for chaining, not null 1470 */ 1471 public DateTimeFormatterBuilder appendOptional(DateTimeFormatter formatter) { 1472 Objects.requireNonNull(formatter, "formatter"); 1473 appendInternal(formatter.toPrinterParser(true)); 1474 return this; 1475 } 1476 1477 //----------------------------------------------------------------------- 1478 /** 1479 * Appends the elements defined by the specified pattern to the builder. 1480 * <p> 1481 * All letters 'A' to 'Z' and 'a' to 'z' are reserved as pattern letters. 1482 * The characters '#', '{' and '}' are reserved for future use. 1483 * The characters '[' and ']' indicate optional patterns. 1484 * The following pattern letters are defined: 1485 * <pre> 1486 * Symbol Meaning Presentation Examples 1487 * ------ ------- ------------ ------- 1488 * G era text AD; Anno Domini; A 1489 * u year year 2004; 04 1490 * y year-of-era year 2004; 04 1491 * D day-of-year number 189 1492 * M/L month-of-year number/text 7; 07; Jul; July; J 1493 * d day-of-month number 10 1494 * g modified-julian-day number 2451334 1495 * 1496 * Q/q quarter-of-year number/text 3; 03; Q3; 3rd quarter 1497 * Y week-based-year year 1996; 96 1498 * w week-of-week-based-year number 27 1499 * W week-of-month number 4 1500 * E day-of-week text Tue; Tuesday; T 1501 * e/c localized day-of-week number/text 2; 02; Tue; Tuesday; T 1502 * F day-of-week-in-month number 3 1503 * 1504 * a am-pm-of-day text PM 1505 * h clock-hour-of-am-pm (1-12) number 12 1506 * K hour-of-am-pm (0-11) number 0 1507 * k clock-hour-of-day (1-24) number 24 1508 * 1509 * H hour-of-day (0-23) number 0 1510 * m minute-of-hour number 30 1511 * s second-of-minute number 55 1512 * S fraction-of-second fraction 978 1513 * A milli-of-day number 1234 1514 * n nano-of-second number 987654321 1515 * N nano-of-day number 1234000000 1516 * 1517 * V time-zone ID zone-id America/Los_Angeles; Z; -08:30 1518 * v generic time-zone name zone-name PT, Pacific Time 1519 * z time-zone name zone-name Pacific Standard Time; PST 1520 * O localized zone-offset offset-O GMT+8; GMT+08:00; UTC-08:00; 1521 * X zone-offset 'Z' for zero offset-X Z; -08; -0830; -08:30; -083015; -08:30:15 1522 * x zone-offset offset-x +0000; -08; -0830; -08:30; -083015; -08:30:15 1523 * Z zone-offset offset-Z +0000; -0800; -08:00 1524 * 1525 * p pad next pad modifier 1 1526 * 1527 * ' escape for text delimiter 1528 * '' single quote literal ' 1529 * [ optional section start 1530 * ] optional section end 1531 * # reserved for future use 1532 * { reserved for future use 1533 * } reserved for future use 1534 * </pre> 1535 * <p> 1536 * The count of pattern letters determine the format. 1537 * See <a href="DateTimeFormatter.html#patterns">DateTimeFormatter</a> for a user-focused description of the patterns. 1538 * The following tables define how the pattern letters map to the builder. 1539 * <p> 1540 * <b>Date fields</b>: Pattern letters to output a date. 1541 * <pre> 1542 * Pattern Count Equivalent builder methods 1543 * ------- ----- -------------------------- 1544 * G 1 appendText(ChronoField.ERA, TextStyle.SHORT) 1545 * GG 2 appendText(ChronoField.ERA, TextStyle.SHORT) 1546 * GGG 3 appendText(ChronoField.ERA, TextStyle.SHORT) 1547 * GGGG 4 appendText(ChronoField.ERA, TextStyle.FULL) 1548 * GGGGG 5 appendText(ChronoField.ERA, TextStyle.NARROW) 1549 * 1550 * u 1 appendValue(ChronoField.YEAR, 1, 19, SignStyle.NORMAL) 1551 * uu 2 appendValueReduced(ChronoField.YEAR, 2, 2000) 1552 * uuu 3 appendValue(ChronoField.YEAR, 3, 19, SignStyle.NORMAL) 1553 * u..u 4..n appendValue(ChronoField.YEAR, n, 19, SignStyle.EXCEEDS_PAD) 1554 * y 1 appendValue(ChronoField.YEAR_OF_ERA, 1, 19, SignStyle.NORMAL) 1555 * yy 2 appendValueReduced(ChronoField.YEAR_OF_ERA, 2, 2000) 1556 * yyy 3 appendValue(ChronoField.YEAR_OF_ERA, 3, 19, SignStyle.NORMAL) 1557 * y..y 4..n appendValue(ChronoField.YEAR_OF_ERA, n, 19, SignStyle.EXCEEDS_PAD) 1558 * Y 1 append special localized WeekFields element for numeric week-based-year 1559 * YY 2 append special localized WeekFields element for reduced numeric week-based-year 2 digits 1560 * YYY 3 append special localized WeekFields element for numeric week-based-year (3, 19, SignStyle.NORMAL) 1561 * Y..Y 4..n append special localized WeekFields element for numeric week-based-year (n, 19, SignStyle.EXCEEDS_PAD) 1562 * 1563 * Q 1 appendValue(IsoFields.QUARTER_OF_YEAR) 1564 * QQ 2 appendValue(IsoFields.QUARTER_OF_YEAR, 2) 1565 * QQQ 3 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.SHORT) 1566 * QQQQ 4 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.FULL) 1567 * QQQQQ 5 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.NARROW) 1568 * q 1 appendValue(IsoFields.QUARTER_OF_YEAR) 1569 * qq 2 appendValue(IsoFields.QUARTER_OF_YEAR, 2) 1570 * qqq 3 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.SHORT_STANDALONE) 1571 * qqqq 4 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.FULL_STANDALONE) 1572 * qqqqq 5 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.NARROW_STANDALONE) 1573 * 1574 * M 1 appendValue(ChronoField.MONTH_OF_YEAR) 1575 * MM 2 appendValue(ChronoField.MONTH_OF_YEAR, 2) 1576 * MMM 3 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.SHORT) 1577 * MMMM 4 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.FULL) 1578 * MMMMM 5 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.NARROW) 1579 * L 1 appendValue(ChronoField.MONTH_OF_YEAR) 1580 * LL 2 appendValue(ChronoField.MONTH_OF_YEAR, 2) 1581 * LLL 3 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.SHORT_STANDALONE) 1582 * LLLL 4 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.FULL_STANDALONE) 1583 * LLLLL 5 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.NARROW_STANDALONE) 1584 * 1585 * w 1 append special localized WeekFields element for numeric week-of-year 1586 * ww 2 append special localized WeekFields element for numeric week-of-year, zero-padded 1587 * W 1 append special localized WeekFields element for numeric week-of-month 1588 * d 1 appendValue(ChronoField.DAY_OF_MONTH) 1589 * dd 2 appendValue(ChronoField.DAY_OF_MONTH, 2) 1590 * D 1 appendValue(ChronoField.DAY_OF_YEAR) 1591 * DD 2 appendValue(ChronoField.DAY_OF_YEAR, 2, 3, SignStyle.NOT_NEGATIVE) 1592 * DDD 3 appendValue(ChronoField.DAY_OF_YEAR, 3) 1593 * F 1 appendValue(ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH) 1594 * g..g 1..n appendValue(JulianFields.MODIFIED_JULIAN_DAY, n, 19, SignStyle.NORMAL) 1595 * E 1 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT) 1596 * EE 2 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT) 1597 * EEE 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT) 1598 * EEEE 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL) 1599 * EEEEE 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW) 1600 * e 1 append special localized WeekFields element for numeric day-of-week 1601 * ee 2 append special localized WeekFields element for numeric day-of-week, zero-padded 1602 * eee 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT) 1603 * eeee 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL) 1604 * eeeee 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW) 1605 * c 1 append special localized WeekFields element for numeric day-of-week 1606 * ccc 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT_STANDALONE) 1607 * cccc 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL_STANDALONE) 1608 * ccccc 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW_STANDALONE) 1609 * </pre> 1610 * <p> 1611 * <b>Time fields</b>: Pattern letters to output a time. 1612 * <pre> 1613 * Pattern Count Equivalent builder methods 1614 * ------- ----- -------------------------- 1615 * a 1 appendText(ChronoField.AMPM_OF_DAY, TextStyle.SHORT) 1616 * h 1 appendValue(ChronoField.CLOCK_HOUR_OF_AMPM) 1617 * hh 2 appendValue(ChronoField.CLOCK_HOUR_OF_AMPM, 2) 1618 * H 1 appendValue(ChronoField.HOUR_OF_DAY) 1619 * HH 2 appendValue(ChronoField.HOUR_OF_DAY, 2) 1620 * k 1 appendValue(ChronoField.CLOCK_HOUR_OF_DAY) 1621 * kk 2 appendValue(ChronoField.CLOCK_HOUR_OF_DAY, 2) 1622 * K 1 appendValue(ChronoField.HOUR_OF_AMPM) 1623 * KK 2 appendValue(ChronoField.HOUR_OF_AMPM, 2) 1624 * m 1 appendValue(ChronoField.MINUTE_OF_HOUR) 1625 * mm 2 appendValue(ChronoField.MINUTE_OF_HOUR, 2) 1626 * s 1 appendValue(ChronoField.SECOND_OF_MINUTE) 1627 * ss 2 appendValue(ChronoField.SECOND_OF_MINUTE, 2) 1628 * 1629 * S..S 1..n appendFraction(ChronoField.NANO_OF_SECOND, n, n, false) 1630 * A..A 1..n appendValue(ChronoField.MILLI_OF_DAY, n, 19, SignStyle.NOT_NEGATIVE) 1631 * n..n 1..n appendValue(ChronoField.NANO_OF_SECOND, n, 19, SignStyle.NOT_NEGATIVE) 1632 * N..N 1..n appendValue(ChronoField.NANO_OF_DAY, n, 19, SignStyle.NOT_NEGATIVE) 1633 * </pre> 1634 * <p> 1635 * <b>Zone ID</b>: Pattern letters to output {@code ZoneId}. 1636 * <pre> 1637 * Pattern Count Equivalent builder methods 1638 * ------- ----- -------------------------- 1639 * VV 2 appendZoneId() 1640 * v 1 appendGenericZoneText(TextStyle.SHORT) 1641 * vvvv 4 appendGenericZoneText(TextStyle.FULL) 1642 * z 1 appendZoneText(TextStyle.SHORT) 1643 * zz 2 appendZoneText(TextStyle.SHORT) 1644 * zzz 3 appendZoneText(TextStyle.SHORT) 1645 * zzzz 4 appendZoneText(TextStyle.FULL) 1646 * </pre> 1647 * <p> 1648 * <b>Zone offset</b>: Pattern letters to output {@code ZoneOffset}. 1649 * <pre> 1650 * Pattern Count Equivalent builder methods 1651 * ------- ----- -------------------------- 1652 * O 1 appendLocalizedOffset(TextStyle.SHORT) 1653 * OOOO 4 appendLocalizedOffset(TextStyle.FULL) 1654 * X 1 appendOffset("+HHmm","Z") 1655 * XX 2 appendOffset("+HHMM","Z") 1656 * XXX 3 appendOffset("+HH:MM","Z") 1657 * XXXX 4 appendOffset("+HHMMss","Z") 1658 * XXXXX 5 appendOffset("+HH:MM:ss","Z") 1659 * x 1 appendOffset("+HHmm","+00") 1660 * xx 2 appendOffset("+HHMM","+0000") 1661 * xxx 3 appendOffset("+HH:MM","+00:00") 1662 * xxxx 4 appendOffset("+HHMMss","+0000") 1663 * xxxxx 5 appendOffset("+HH:MM:ss","+00:00") 1664 * Z 1 appendOffset("+HHMM","+0000") 1665 * ZZ 2 appendOffset("+HHMM","+0000") 1666 * ZZZ 3 appendOffset("+HHMM","+0000") 1667 * ZZZZ 4 appendLocalizedOffset(TextStyle.FULL) 1668 * ZZZZZ 5 appendOffset("+HH:MM:ss","Z") 1669 * </pre> 1670 * <p> 1671 * <b>Modifiers</b>: Pattern letters that modify the rest of the pattern: 1672 * <pre> 1673 * Pattern Count Equivalent builder methods 1674 * ------- ----- -------------------------- 1675 * [ 1 optionalStart() 1676 * ] 1 optionalEnd() 1677 * p..p 1..n padNext(n) 1678 * </pre> 1679 * <p> 1680 * Any sequence of letters not specified above, unrecognized letter or 1681 * reserved character will throw an exception. 1682 * Future versions may add to the set of patterns. 1683 * It is recommended to use single quotes around all characters that you want 1684 * to output directly to ensure that future changes do not break your application. 1685 * <p> 1686 * Note that the pattern string is similar, but not identical, to 1687 * {@link java.text.SimpleDateFormat SimpleDateFormat}. 1688 * The pattern string is also similar, but not identical, to that defined by the 1689 * Unicode Common Locale Data Repository (CLDR/LDML). 1690 * Pattern letters 'X' and 'u' are aligned with Unicode CLDR/LDML. 1691 * By contrast, {@code SimpleDateFormat} uses 'u' for the numeric day of week. 1692 * Pattern letters 'y' and 'Y' parse years of two digits and more than 4 digits differently. 1693 * Pattern letters 'n', 'A', 'N', and 'p' are added. 1694 * Number types will reject large numbers. 1695 * 1696 * @param pattern the pattern to add, not null 1697 * @return this, for chaining, not null 1698 * @throws IllegalArgumentException if the pattern is invalid 1699 */ 1700 public DateTimeFormatterBuilder appendPattern(String pattern) { 1701 Objects.requireNonNull(pattern, "pattern"); 1702 parsePattern(pattern); 1703 return this; 1704 } 1705 1706 private void parsePattern(String pattern) { 1707 for (int pos = 0; pos < pattern.length(); pos++) { 1708 char cur = pattern.charAt(pos); 1709 if ((cur >= 'A' && cur <= 'Z') || (cur >= 'a' && cur <= 'z')) { 1710 int start = pos++; 1711 for ( ; pos < pattern.length() && pattern.charAt(pos) == cur; pos++); // short loop 1712 int count = pos - start; 1713 // padding 1714 if (cur == 'p') { 1715 int pad = 0; 1716 if (pos < pattern.length()) { 1717 cur = pattern.charAt(pos); 1718 if ((cur >= 'A' && cur <= 'Z') || (cur >= 'a' && cur <= 'z')) { 1719 pad = count; 1720 start = pos++; 1721 for ( ; pos < pattern.length() && pattern.charAt(pos) == cur; pos++); // short loop 1722 count = pos - start; 1723 } 1724 } 1725 if (pad == 0) { 1726 throw new IllegalArgumentException( 1727 "Pad letter 'p' must be followed by valid pad pattern: " + pattern); 1728 } 1729 padNext(pad); // pad and continue parsing 1730 } 1731 // main rules 1732 TemporalField field = FIELD_MAP.get(cur); 1733 if (field != null) { 1734 parseField(cur, count, field); 1735 } else if (cur == 'z') { 1736 if (count > 4) { 1737 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1738 } else if (count == 4) { 1739 appendZoneText(TextStyle.FULL); 1740 } else { 1741 appendZoneText(TextStyle.SHORT); 1742 } 1743 } else if (cur == 'V') { 1744 if (count != 2) { 1745 throw new IllegalArgumentException("Pattern letter count must be 2: " + cur); 1746 } 1747 appendZoneId(); 1748 } else if (cur == 'v') { 1749 if (count == 1) { 1750 appendGenericZoneText(TextStyle.SHORT); 1751 } else if (count == 4) { 1752 appendGenericZoneText(TextStyle.FULL); 1753 } else { 1754 throw new IllegalArgumentException("Wrong number of pattern letters: " + cur); 1755 } 1756 } else if (cur == 'Z') { 1757 if (count < 4) { 1758 appendOffset("+HHMM", "+0000"); 1759 } else if (count == 4) { 1760 appendLocalizedOffset(TextStyle.FULL); 1761 } else if (count == 5) { 1762 appendOffset("+HH:MM:ss","Z"); 1763 } else { 1764 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1765 } 1766 } else if (cur == 'O') { 1767 if (count == 1) { 1768 appendLocalizedOffset(TextStyle.SHORT); 1769 } else if (count == 4) { 1770 appendLocalizedOffset(TextStyle.FULL); 1771 } else { 1772 throw new IllegalArgumentException("Pattern letter count must be 1 or 4: " + cur); 1773 } 1774 } else if (cur == 'X') { 1775 if (count > 5) { 1776 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1777 } 1778 appendOffset(OffsetIdPrinterParser.PATTERNS[count + (count == 1 ? 0 : 1)], "Z"); 1779 } else if (cur == 'x') { 1780 if (count > 5) { 1781 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1782 } 1783 String zero = (count == 1 ? "+00" : (count % 2 == 0 ? "+0000" : "+00:00")); 1784 appendOffset(OffsetIdPrinterParser.PATTERNS[count + (count == 1 ? 0 : 1)], zero); 1785 } else if (cur == 'W') { 1786 // Fields defined by Locale 1787 if (count > 1) { 1788 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1789 } 1790 appendValue(new WeekBasedFieldPrinterParser(cur, count, count, count)); 1791 } else if (cur == 'w') { 1792 // Fields defined by Locale 1793 if (count > 2) { 1794 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1795 } 1796 appendValue(new WeekBasedFieldPrinterParser(cur, count, count, 2)); 1797 } else if (cur == 'Y') { 1798 // Fields defined by Locale 1799 if (count == 2) { 1800 appendValue(new WeekBasedFieldPrinterParser(cur, count, count, 2)); 1801 } else { 1802 appendValue(new WeekBasedFieldPrinterParser(cur, count, count, 19)); 1803 } 1804 } else { 1805 throw new IllegalArgumentException("Unknown pattern letter: " + cur); 1806 } 1807 pos--; 1808 1809 } else if (cur == '\'') { 1810 // parse literals 1811 int start = pos++; 1812 for ( ; pos < pattern.length(); pos++) { 1813 if (pattern.charAt(pos) == '\'') { 1814 if (pos + 1 < pattern.length() && pattern.charAt(pos + 1) == '\'') { 1815 pos++; 1816 } else { 1817 break; // end of literal 1818 } 1819 } 1820 } 1821 if (pos >= pattern.length()) { 1822 throw new IllegalArgumentException("Pattern ends with an incomplete string literal: " + pattern); 1823 } 1824 String str = pattern.substring(start + 1, pos); 1825 if (str.length() == 0) { 1826 appendLiteral('\''); 1827 } else { 1828 appendLiteral(str.replace("''", "'")); 1829 } 1830 1831 } else if (cur == '[') { 1832 optionalStart(); 1833 1834 } else if (cur == ']') { 1835 if (active.parent == null) { 1836 throw new IllegalArgumentException("Pattern invalid as it contains ] without previous ["); 1837 } 1838 optionalEnd(); 1839 1840 } else if (cur == '{' || cur == '}' || cur == '#') { 1841 throw new IllegalArgumentException("Pattern includes reserved character: '" + cur + "'"); 1842 } else { 1843 appendLiteral(cur); 1844 } 1845 } 1846 } 1847 1848 @SuppressWarnings("fallthrough") 1849 private void parseField(char cur, int count, TemporalField field) { 1850 boolean standalone = false; 1851 switch (cur) { 1852 case 'u': 1853 case 'y': 1854 if (count == 2) { 1855 appendValueReduced(field, 2, 2, ReducedPrinterParser.BASE_DATE); 1856 } else if (count < 4) { 1857 appendValue(field, count, 19, SignStyle.NORMAL); 1858 } else { 1859 appendValue(field, count, 19, SignStyle.EXCEEDS_PAD); 1860 } 1861 break; 1862 case 'c': 1863 if (count == 1) { 1864 appendValue(new WeekBasedFieldPrinterParser(cur, count, count, count)); 1865 break; 1866 } else if (count == 2) { 1867 throw new IllegalArgumentException("Invalid pattern \"cc\""); 1868 } 1869 /*fallthrough*/ 1870 case 'L': 1871 case 'q': 1872 standalone = true; 1873 /*fallthrough*/ 1874 case 'M': 1875 case 'Q': 1876 case 'E': 1877 case 'e': 1878 switch (count) { 1879 case 1: 1880 case 2: 1881 if (cur == 'e') { 1882 appendValue(new WeekBasedFieldPrinterParser(cur, count, count, count)); 1883 } else if (cur == 'E') { 1884 appendText(field, TextStyle.SHORT); 1885 } else { 1886 if (count == 1) { 1887 appendValue(field); 1888 } else { 1889 appendValue(field, 2); 1890 } 1891 } 1892 break; 1893 case 3: 1894 appendText(field, standalone ? TextStyle.SHORT_STANDALONE : TextStyle.SHORT); 1895 break; 1896 case 4: 1897 appendText(field, standalone ? TextStyle.FULL_STANDALONE : TextStyle.FULL); 1898 break; 1899 case 5: 1900 appendText(field, standalone ? TextStyle.NARROW_STANDALONE : TextStyle.NARROW); 1901 break; 1902 default: 1903 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1904 } 1905 break; 1906 case 'a': 1907 if (count == 1) { 1908 appendText(field, TextStyle.SHORT); 1909 } else { 1910 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1911 } 1912 break; 1913 case 'G': 1914 switch (count) { 1915 case 1: 1916 case 2: 1917 case 3: 1918 appendText(field, TextStyle.SHORT); 1919 break; 1920 case 4: 1921 appendText(field, TextStyle.FULL); 1922 break; 1923 case 5: 1924 appendText(field, TextStyle.NARROW); 1925 break; 1926 default: 1927 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1928 } 1929 break; 1930 case 'S': 1931 appendFraction(NANO_OF_SECOND, count, count, false); 1932 break; 1933 case 'F': 1934 if (count == 1) { 1935 appendValue(field); 1936 } else { 1937 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1938 } 1939 break; 1940 case 'd': 1941 case 'h': 1942 case 'H': 1943 case 'k': 1944 case 'K': 1945 case 'm': 1946 case 's': 1947 if (count == 1) { 1948 appendValue(field); 1949 } else if (count == 2) { 1950 appendValue(field, count); 1951 } else { 1952 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1953 } 1954 break; 1955 case 'D': 1956 if (count == 1) { 1957 appendValue(field); 1958 } else if (count == 2 || count == 3) { 1959 appendValue(field, count, 3, SignStyle.NOT_NEGATIVE); 1960 } else { 1961 throw new IllegalArgumentException("Too many pattern letters: " + cur); 1962 } 1963 break; 1964 case 'g': 1965 appendValue(field, count, 19, SignStyle.NORMAL); 1966 break; 1967 case 'A': 1968 case 'n': 1969 case 'N': 1970 appendValue(field, count, 19, SignStyle.NOT_NEGATIVE); 1971 break; 1972 default: 1973 if (count == 1) { 1974 appendValue(field); 1975 } else { 1976 appendValue(field, count); 1977 } 1978 break; 1979 } 1980 } 1981 1982 /** Map of letters to fields. */ 1983 private static final Map<Character, TemporalField> FIELD_MAP = new HashMap<>(); 1984 static { 1985 // SDF = SimpleDateFormat 1986 FIELD_MAP.put('G', ChronoField.ERA); // SDF, LDML (different to both for 1/2 chars) 1987 FIELD_MAP.put('y', ChronoField.YEAR_OF_ERA); // SDF, LDML 1988 FIELD_MAP.put('u', ChronoField.YEAR); // LDML (different in SDF) 1989 FIELD_MAP.put('Q', IsoFields.QUARTER_OF_YEAR); // LDML (removed quarter from 310) 1990 FIELD_MAP.put('q', IsoFields.QUARTER_OF_YEAR); // LDML (stand-alone) 1991 FIELD_MAP.put('M', ChronoField.MONTH_OF_YEAR); // SDF, LDML 1992 FIELD_MAP.put('L', ChronoField.MONTH_OF_YEAR); // SDF, LDML (stand-alone) 1993 FIELD_MAP.put('D', ChronoField.DAY_OF_YEAR); // SDF, LDML 1994 FIELD_MAP.put('d', ChronoField.DAY_OF_MONTH); // SDF, LDML 1995 FIELD_MAP.put('F', ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH); // SDF, LDML 1996 FIELD_MAP.put('E', ChronoField.DAY_OF_WEEK); // SDF, LDML (different to both for 1/2 chars) 1997 FIELD_MAP.put('c', ChronoField.DAY_OF_WEEK); // LDML (stand-alone) 1998 FIELD_MAP.put('e', ChronoField.DAY_OF_WEEK); // LDML (needs localized week number) 1999 FIELD_MAP.put('a', ChronoField.AMPM_OF_DAY); // SDF, LDML 2000 FIELD_MAP.put('H', ChronoField.HOUR_OF_DAY); // SDF, LDML 2001 FIELD_MAP.put('k', ChronoField.CLOCK_HOUR_OF_DAY); // SDF, LDML 2002 FIELD_MAP.put('K', ChronoField.HOUR_OF_AMPM); // SDF, LDML 2003 FIELD_MAP.put('h', ChronoField.CLOCK_HOUR_OF_AMPM); // SDF, LDML 2004 FIELD_MAP.put('m', ChronoField.MINUTE_OF_HOUR); // SDF, LDML 2005 FIELD_MAP.put('s', ChronoField.SECOND_OF_MINUTE); // SDF, LDML 2006 FIELD_MAP.put('S', ChronoField.NANO_OF_SECOND); // LDML (SDF uses milli-of-second number) 2007 FIELD_MAP.put('A', ChronoField.MILLI_OF_DAY); // LDML 2008 FIELD_MAP.put('n', ChronoField.NANO_OF_SECOND); // 310 (proposed for LDML) 2009 FIELD_MAP.put('N', ChronoField.NANO_OF_DAY); // 310 (proposed for LDML) 2010 FIELD_MAP.put('g', JulianFields.MODIFIED_JULIAN_DAY); 2011 // 310 - z - time-zone names, matches LDML and SimpleDateFormat 1 to 4 2012 // 310 - Z - matches SimpleDateFormat and LDML 2013 // 310 - V - time-zone id, matches LDML 2014 // 310 - v - general timezone names, not matching exactly with LDML because LDML specify to fall back 2015 // to 'VVVV' if general-nonlocation unavailable but here it's not falling back because of lack of data 2016 // 310 - p - prefix for padding 2017 // 310 - X - matches LDML, almost matches SDF for 1, exact match 2&3, extended 4&5 2018 // 310 - x - matches LDML 2019 // 310 - w, W, and Y are localized forms matching LDML 2020 // LDML - U - cycle year name, not supported by 310 yet 2021 // LDML - l - deprecated 2022 // LDML - j - not relevant 2023 } 2024 2025 //----------------------------------------------------------------------- 2026 /** 2027 * Causes the next added printer/parser to pad to a fixed width using a space. 2028 * <p> 2029 * This padding will pad to a fixed width using spaces. 2030 * <p> 2031 * During formatting, the decorated element will be output and then padded 2032 * to the specified width. An exception will be thrown during formatting if 2033 * the pad width is exceeded. 2034 * <p> 2035 * During parsing, the padding and decorated element are parsed. 2036 * If parsing is lenient, then the pad width is treated as a maximum. 2037 * The padding is parsed greedily. Thus, if the decorated element starts with 2038 * the pad character, it will not be parsed. 2039 * 2040 * @param padWidth the pad width, 1 or greater 2041 * @return this, for chaining, not null 2042 * @throws IllegalArgumentException if pad width is too small 2043 */ 2044 public DateTimeFormatterBuilder padNext(int padWidth) { 2045 return padNext(padWidth, ' '); 2046 } 2047 2048 /** 2049 * Causes the next added printer/parser to pad to a fixed width. 2050 * <p> 2051 * This padding is intended for padding other than zero-padding. 2052 * Zero-padding should be achieved using the appendValue methods. 2053 * <p> 2054 * During formatting, the decorated element will be output and then padded 2055 * to the specified width. An exception will be thrown during formatting if 2056 * the pad width is exceeded. 2057 * <p> 2058 * During parsing, the padding and decorated element are parsed. 2059 * If parsing is lenient, then the pad width is treated as a maximum. 2060 * If parsing is case insensitive, then the pad character is matched ignoring case. 2061 * The padding is parsed greedily. Thus, if the decorated element starts with 2062 * the pad character, it will not be parsed. 2063 * 2064 * @param padWidth the pad width, 1 or greater 2065 * @param padChar the pad character 2066 * @return this, for chaining, not null 2067 * @throws IllegalArgumentException if pad width is too small 2068 */ 2069 public DateTimeFormatterBuilder padNext(int padWidth, char padChar) { 2070 if (padWidth < 1) { 2071 throw new IllegalArgumentException("The pad width must be at least one but was " + padWidth); 2072 } 2073 active.padNextWidth = padWidth; 2074 active.padNextChar = padChar; 2075 active.valueParserIndex = -1; 2076 return this; 2077 } 2078 2079 //----------------------------------------------------------------------- 2080 /** 2081 * Mark the start of an optional section. 2082 * <p> 2083 * The output of formatting can include optional sections, which may be nested. 2084 * An optional section is started by calling this method and ended by calling 2085 * {@link #optionalEnd()} or by ending the build process. 2086 * <p> 2087 * All elements in the optional section are treated as optional. 2088 * During formatting, the section is only output if data is available in the 2089 * {@code TemporalAccessor} for all the elements in the section. 2090 * During parsing, the whole section may be missing from the parsed string. 2091 * <p> 2092 * For example, consider a builder setup as 2093 * {@code builder.appendValue(HOUR_OF_DAY,2).optionalStart().appendValue(MINUTE_OF_HOUR,2)}. 2094 * The optional section ends automatically at the end of the builder. 2095 * During formatting, the minute will only be output if its value can be obtained from the date-time. 2096 * During parsing, the input will be successfully parsed whether the minute is present or not. 2097 * 2098 * @return this, for chaining, not null 2099 */ 2100 public DateTimeFormatterBuilder optionalStart() { 2101 active.valueParserIndex = -1; 2102 active = new DateTimeFormatterBuilder(active, true); 2103 return this; 2104 } 2105 2106 /** 2107 * Ends an optional section. 2108 * <p> 2109 * The output of formatting can include optional sections, which may be nested. 2110 * An optional section is started by calling {@link #optionalStart()} and ended 2111 * using this method (or at the end of the builder). 2112 * <p> 2113 * Calling this method without having previously called {@code optionalStart} 2114 * will throw an exception. 2115 * Calling this method immediately after calling {@code optionalStart} has no effect 2116 * on the formatter other than ending the (empty) optional section. 2117 * <p> 2118 * All elements in the optional section are treated as optional. 2119 * During formatting, the section is only output if data is available in the 2120 * {@code TemporalAccessor} for all the elements in the section. 2121 * During parsing, the whole section may be missing from the parsed string. 2122 * <p> 2123 * For example, consider a builder setup as 2124 * {@code builder.appendValue(HOUR_OF_DAY,2).optionalStart().appendValue(MINUTE_OF_HOUR,2).optionalEnd()}. 2125 * During formatting, the minute will only be output if its value can be obtained from the date-time. 2126 * During parsing, the input will be successfully parsed whether the minute is present or not. 2127 * 2128 * @return this, for chaining, not null 2129 * @throws IllegalStateException if there was no previous call to {@code optionalStart} 2130 */ 2131 public DateTimeFormatterBuilder optionalEnd() { 2132 if (active.parent == null) { 2133 throw new IllegalStateException("Cannot call optionalEnd() as there was no previous call to optionalStart()"); 2134 } 2135 if (active.printerParsers.size() > 0) { 2136 CompositePrinterParser cpp = new CompositePrinterParser(active.printerParsers, active.optional); 2137 active = active.parent; 2138 appendInternal(cpp); 2139 } else { 2140 active = active.parent; 2141 } 2142 return this; 2143 } 2144 2145 //----------------------------------------------------------------------- 2146 /** 2147 * Appends a printer and/or parser to the internal list handling padding. 2148 * 2149 * @param pp the printer-parser to add, not null 2150 * @return the index into the active parsers list 2151 */ 2152 private int appendInternal(DateTimePrinterParser pp) { 2153 Objects.requireNonNull(pp, "pp"); 2154 if (active.padNextWidth > 0) { 2155 if (pp != null) { 2156 pp = new PadPrinterParserDecorator(pp, active.padNextWidth, active.padNextChar); 2157 } 2158 active.padNextWidth = 0; 2159 active.padNextChar = 0; 2160 } 2161 active.printerParsers.add(pp); 2162 active.valueParserIndex = -1; 2163 return active.printerParsers.size() - 1; 2164 } 2165 2166 //----------------------------------------------------------------------- 2167 /** 2168 * Completes this builder by creating the {@code DateTimeFormatter} 2169 * using the default locale. 2170 * <p> 2171 * This will create a formatter with the {@linkplain Locale#getDefault(Locale.Category) default FORMAT locale}. 2172 * Numbers will be printed and parsed using the standard DecimalStyle. 2173 * The resolver style will be {@link ResolverStyle#SMART SMART}. 2174 * <p> 2175 * Calling this method will end any open optional sections by repeatedly 2176 * calling {@link #optionalEnd()} before creating the formatter. 2177 * <p> 2178 * This builder can still be used after creating the formatter if desired, 2179 * although the state may have been changed by calls to {@code optionalEnd}. 2180 * 2181 * @return the created formatter, not null 2182 */ 2183 public DateTimeFormatter toFormatter() { 2184 return toFormatter(Locale.getDefault(Locale.Category.FORMAT)); 2185 } 2186 2187 /** 2188 * Completes this builder by creating the {@code DateTimeFormatter} 2189 * using the specified locale. 2190 * <p> 2191 * This will create a formatter with the specified locale. 2192 * Numbers will be printed and parsed using the standard DecimalStyle. 2193 * The resolver style will be {@link ResolverStyle#SMART SMART}. 2194 * <p> 2195 * Calling this method will end any open optional sections by repeatedly 2196 * calling {@link #optionalEnd()} before creating the formatter. 2197 * <p> 2198 * This builder can still be used after creating the formatter if desired, 2199 * although the state may have been changed by calls to {@code optionalEnd}. 2200 * 2201 * @param locale the locale to use for formatting, not null 2202 * @return the created formatter, not null 2203 */ 2204 public DateTimeFormatter toFormatter(Locale locale) { 2205 return toFormatter(locale, ResolverStyle.SMART, null); 2206 } 2207 2208 /** 2209 * Completes this builder by creating the formatter. 2210 * This uses the default locale. 2211 * 2212 * @param resolverStyle the resolver style to use, not null 2213 * @return the created formatter, not null 2214 */ 2215 DateTimeFormatter toFormatter(ResolverStyle resolverStyle, Chronology chrono) { 2216 return toFormatter(Locale.getDefault(Locale.Category.FORMAT), resolverStyle, chrono); 2217 } 2218 2219 /** 2220 * Completes this builder by creating the formatter. 2221 * 2222 * @param locale the locale to use for formatting, not null 2223 * @param chrono the chronology to use, may be null 2224 * @return the created formatter, not null 2225 */ 2226 private DateTimeFormatter toFormatter(Locale locale, ResolverStyle resolverStyle, Chronology chrono) { 2227 Objects.requireNonNull(locale, "locale"); 2228 while (active.parent != null) { 2229 optionalEnd(); 2230 } 2231 CompositePrinterParser pp = new CompositePrinterParser(printerParsers, false); 2232 return new DateTimeFormatter(pp, locale, DecimalStyle.STANDARD, 2233 resolverStyle, null, chrono, null); 2234 } 2235 2236 //----------------------------------------------------------------------- 2237 /** 2238 * Strategy for formatting/parsing date-time information. 2239 * <p> 2240 * The printer may format any part, or the whole, of the input date-time object. 2241 * Typically, a complete format is constructed from a number of smaller 2242 * units, each outputting a single field. 2243 * <p> 2244 * The parser may parse any piece of text from the input, storing the result 2245 * in the context. Typically, each individual parser will just parse one 2246 * field, such as the day-of-month, storing the value in the context. 2247 * Once the parse is complete, the caller will then resolve the parsed values 2248 * to create the desired object, such as a {@code LocalDate}. 2249 * <p> 2250 * The parse position will be updated during the parse. Parsing will start at 2251 * the specified index and the return value specifies the new parse position 2252 * for the next parser. If an error occurs, the returned index will be negative 2253 * and will have the error position encoded using the complement operator. 2254 * 2255 * @implSpec 2256 * This interface must be implemented with care to ensure other classes operate correctly. 2257 * All implementations that can be instantiated must be final, immutable and thread-safe. 2258 * <p> 2259 * The context is not a thread-safe object and a new instance will be created 2260 * for each format that occurs. The context must not be stored in an instance 2261 * variable or shared with any other threads. 2262 */ 2263 interface DateTimePrinterParser { 2264 2265 /** 2266 * Prints the date-time object to the buffer. 2267 * <p> 2268 * The context holds information to use during the format. 2269 * It also contains the date-time information to be printed. 2270 * <p> 2271 * The buffer must not be mutated beyond the content controlled by the implementation. 2272 * 2273 * @param context the context to format using, not null 2274 * @param buf the buffer to append to, not null 2275 * @return false if unable to query the value from the date-time, true otherwise 2276 * @throws DateTimeException if the date-time cannot be printed successfully 2277 */ 2278 boolean format(DateTimePrintContext context, StringBuilder buf); 2279 2280 /** 2281 * Parses text into date-time information. 2282 * <p> 2283 * The context holds information to use during the parse. 2284 * It is also used to store the parsed date-time information. 2285 * 2286 * @param context the context to use and parse into, not null 2287 * @param text the input text to parse, not null 2288 * @param position the position to start parsing at, from 0 to the text length 2289 * @return the new parse position, where negative means an error with the 2290 * error position encoded using the complement ~ operator 2291 * @throws NullPointerException if the context or text is null 2292 * @throws IndexOutOfBoundsException if the position is invalid 2293 */ 2294 int parse(DateTimeParseContext context, CharSequence text, int position); 2295 } 2296 2297 //----------------------------------------------------------------------- 2298 /** 2299 * Composite printer and parser. 2300 */ 2301 static final class CompositePrinterParser implements DateTimePrinterParser { 2302 private final DateTimePrinterParser[] printerParsers; 2303 private final boolean optional; 2304 2305 CompositePrinterParser(List<DateTimePrinterParser> printerParsers, boolean optional) { 2306 this(printerParsers.toArray(new DateTimePrinterParser[printerParsers.size()]), optional); 2307 } 2308 2309 CompositePrinterParser(DateTimePrinterParser[] printerParsers, boolean optional) { 2310 this.printerParsers = printerParsers; 2311 this.optional = optional; 2312 } 2313 2314 /** 2315 * Returns a copy of this printer-parser with the optional flag changed. 2316 * 2317 * @param optional the optional flag to set in the copy 2318 * @return the new printer-parser, not null 2319 */ 2320 public CompositePrinterParser withOptional(boolean optional) { 2321 if (optional == this.optional) { 2322 return this; 2323 } 2324 return new CompositePrinterParser(printerParsers, optional); 2325 } 2326 2327 @Override 2328 public boolean format(DateTimePrintContext context, StringBuilder buf) { 2329 int length = buf.length(); 2330 if (optional) { 2331 context.startOptional(); 2332 } 2333 try { 2334 for (DateTimePrinterParser pp : printerParsers) { 2335 if (pp.format(context, buf) == false) { 2336 buf.setLength(length); // reset buffer 2337 return true; 2338 } 2339 } 2340 } finally { 2341 if (optional) { 2342 context.endOptional(); 2343 } 2344 } 2345 return true; 2346 } 2347 2348 @Override 2349 public int parse(DateTimeParseContext context, CharSequence text, int position) { 2350 if (optional) { 2351 context.startOptional(); 2352 int pos = position; 2353 for (DateTimePrinterParser pp : printerParsers) { 2354 pos = pp.parse(context, text, pos); 2355 if (pos < 0) { 2356 context.endOptional(false); 2357 return position; // return original position 2358 } 2359 } 2360 context.endOptional(true); 2361 return pos; 2362 } else { 2363 for (DateTimePrinterParser pp : printerParsers) { 2364 position = pp.parse(context, text, position); 2365 if (position < 0) { 2366 break; 2367 } 2368 } 2369 return position; 2370 } 2371 } 2372 2373 @Override 2374 public String toString() { 2375 StringBuilder buf = new StringBuilder(); 2376 if (printerParsers != null) { 2377 buf.append(optional ? "[" : "("); 2378 for (DateTimePrinterParser pp : printerParsers) { 2379 buf.append(pp); 2380 } 2381 buf.append(optional ? "]" : ")"); 2382 } 2383 return buf.toString(); 2384 } 2385 } 2386 2387 //----------------------------------------------------------------------- 2388 /** 2389 * Pads the output to a fixed width. 2390 */ 2391 static final class PadPrinterParserDecorator implements DateTimePrinterParser { 2392 private final DateTimePrinterParser printerParser; 2393 private final int padWidth; 2394 private final char padChar; 2395 2396 /** 2397 * Constructor. 2398 * 2399 * @param printerParser the printer, not null 2400 * @param padWidth the width to pad to, 1 or greater 2401 * @param padChar the pad character 2402 */ 2403 PadPrinterParserDecorator(DateTimePrinterParser printerParser, int padWidth, char padChar) { 2404 // input checked by DateTimeFormatterBuilder 2405 this.printerParser = printerParser; 2406 this.padWidth = padWidth; 2407 this.padChar = padChar; 2408 } 2409 2410 @Override 2411 public boolean format(DateTimePrintContext context, StringBuilder buf) { 2412 int preLen = buf.length(); 2413 if (printerParser.format(context, buf) == false) { 2414 return false; 2415 } 2416 int len = buf.length() - preLen; 2417 if (len > padWidth) { 2418 throw new DateTimeException( 2419 "Cannot print as output of " + len + " characters exceeds pad width of " + padWidth); 2420 } 2421 for (int i = 0; i < padWidth - len; i++) { 2422 buf.insert(preLen, padChar); 2423 } 2424 return true; 2425 } 2426 2427 @Override 2428 public int parse(DateTimeParseContext context, CharSequence text, int position) { 2429 // cache context before changed by decorated parser 2430 final boolean strict = context.isStrict(); 2431 // parse 2432 if (position > text.length()) { 2433 throw new IndexOutOfBoundsException(); 2434 } 2435 if (position == text.length()) { 2436 return ~position; // no more characters in the string 2437 } 2438 int endPos = position + padWidth; 2439 if (endPos > text.length()) { 2440 if (strict) { 2441 return ~position; // not enough characters in the string to meet the parse width 2442 } 2443 endPos = text.length(); 2444 } 2445 int pos = position; 2446 while (pos < endPos && context.charEquals(text.charAt(pos), padChar)) { 2447 pos++; 2448 } 2449 text = text.subSequence(0, endPos); 2450 int resultPos = printerParser.parse(context, text, pos); 2451 if (resultPos != endPos && strict) { 2452 return ~(position + pos); // parse of decorated field didn't parse to the end 2453 } 2454 return resultPos; 2455 } 2456 2457 @Override 2458 public String toString() { 2459 return "Pad(" + printerParser + "," + padWidth + (padChar == ' ' ? ")" : ",'" + padChar + "')"); 2460 } 2461 } 2462 2463 //----------------------------------------------------------------------- 2464 /** 2465 * Enumeration to apply simple parse settings. 2466 */ 2467 static enum SettingsParser implements DateTimePrinterParser { 2468 SENSITIVE, 2469 INSENSITIVE, 2470 STRICT, 2471 LENIENT; 2472 2473 @Override 2474 public boolean format(DateTimePrintContext context, StringBuilder buf) { 2475 return true; // nothing to do here 2476 } 2477 2478 @Override 2479 public int parse(DateTimeParseContext context, CharSequence text, int position) { 2480 // using ordinals to avoid javac synthetic inner class 2481 switch (ordinal()) { 2482 case 0: context.setCaseSensitive(true); break; 2483 case 1: context.setCaseSensitive(false); break; 2484 case 2: context.setStrict(true); break; 2485 case 3: context.setStrict(false); break; 2486 } 2487 return position; 2488 } 2489 2490 @Override 2491 public String toString() { 2492 // using ordinals to avoid javac synthetic inner class 2493 switch (ordinal()) { 2494 case 0: return "ParseCaseSensitive(true)"; 2495 case 1: return "ParseCaseSensitive(false)"; 2496 case 2: return "ParseStrict(true)"; 2497 case 3: return "ParseStrict(false)"; 2498 } 2499 throw new IllegalStateException("Unreachable"); 2500 } 2501 } 2502 2503 //----------------------------------------------------------------------- 2504 /** 2505 * Defaults a value into the parse if not currently present. 2506 */ 2507 static class DefaultValueParser implements DateTimePrinterParser { 2508 private final TemporalField field; 2509 private final long value; 2510 2511 DefaultValueParser(TemporalField field, long value) { 2512 this.field = field; 2513 this.value = value; 2514 } 2515 2516 public boolean format(DateTimePrintContext context, StringBuilder buf) { 2517 return true; 2518 } 2519 2520 public int parse(DateTimeParseContext context, CharSequence text, int position) { 2521 if (context.getParsed(field) == null) { 2522 context.setParsedField(field, value, position, position); 2523 } 2524 return position; 2525 } 2526 } 2527 2528 //----------------------------------------------------------------------- 2529 /** 2530 * Prints or parses a character literal. 2531 */ 2532 static final class CharLiteralPrinterParser implements DateTimePrinterParser { 2533 private final char literal; 2534 2535 CharLiteralPrinterParser(char literal) { 2536 this.literal = literal; 2537 } 2538 2539 @Override 2540 public boolean format(DateTimePrintContext context, StringBuilder buf) { 2541 buf.append(literal); 2542 return true; 2543 } 2544 2545 @Override 2546 public int parse(DateTimeParseContext context, CharSequence text, int position) { 2547 int length = text.length(); 2548 if (position == length) { 2549 return ~position; 2550 } 2551 char ch = text.charAt(position); 2552 if (ch != literal) { 2553 if (context.isCaseSensitive() || 2554 (Character.toUpperCase(ch) != Character.toUpperCase(literal) && 2555 Character.toLowerCase(ch) != Character.toLowerCase(literal))) { 2556 return ~position; 2557 } 2558 } 2559 return position + 1; 2560 } 2561 2562 @Override 2563 public String toString() { 2564 if (literal == '\'') { 2565 return "''"; 2566 } 2567 return "'" + literal + "'"; 2568 } 2569 } 2570 2571 //----------------------------------------------------------------------- 2572 /** 2573 * Prints or parses a string literal. 2574 */ 2575 static final class StringLiteralPrinterParser implements DateTimePrinterParser { 2576 private final String literal; 2577 2578 StringLiteralPrinterParser(String literal) { 2579 this.literal = literal; // validated by caller 2580 } 2581 2582 @Override 2583 public boolean format(DateTimePrintContext context, StringBuilder buf) { 2584 buf.append(literal); 2585 return true; 2586 } 2587 2588 @Override 2589 public int parse(DateTimeParseContext context, CharSequence text, int position) { 2590 int length = text.length(); 2591 if (position > length || position < 0) { 2592 throw new IndexOutOfBoundsException(); 2593 } 2594 if (context.subSequenceEquals(text, position, literal, 0, literal.length()) == false) { 2595 return ~position; 2596 } 2597 return position + literal.length(); 2598 } 2599 2600 @Override 2601 public String toString() { 2602 String converted = literal.replace("'", "''"); 2603 return "'" + converted + "'"; 2604 } 2605 } 2606 2607 //----------------------------------------------------------------------- 2608 /** 2609 * Prints and parses a numeric date-time field with optional padding. 2610 */ 2611 static class NumberPrinterParser implements DateTimePrinterParser { 2612 2613 /** 2614 * Array of 10 to the power of n. 2615 */ 2616 static final long[] EXCEED_POINTS = new long[] { 2617 0L, 2618 10L, 2619 100L, 2620 1000L, 2621 10000L, 2622 100000L, 2623 1000000L, 2624 10000000L, 2625 100000000L, 2626 1000000000L, 2627 10000000000L, 2628 }; 2629 2630 final TemporalField field; 2631 final int minWidth; 2632 final int maxWidth; 2633 private final SignStyle signStyle; 2634 final int subsequentWidth; 2635 2636 /** 2637 * Constructor. 2638 * 2639 * @param field the field to format, not null 2640 * @param minWidth the minimum field width, from 1 to 19 2641 * @param maxWidth the maximum field width, from minWidth to 19 2642 * @param signStyle the positive/negative sign style, not null 2643 */ 2644 NumberPrinterParser(TemporalField field, int minWidth, int maxWidth, SignStyle signStyle) { 2645 // validated by caller 2646 this.field = field; 2647 this.minWidth = minWidth; 2648 this.maxWidth = maxWidth; 2649 this.signStyle = signStyle; 2650 this.subsequentWidth = 0; 2651 } 2652 2653 /** 2654 * Constructor. 2655 * 2656 * @param field the field to format, not null 2657 * @param minWidth the minimum field width, from 1 to 19 2658 * @param maxWidth the maximum field width, from minWidth to 19 2659 * @param signStyle the positive/negative sign style, not null 2660 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater, 2661 * -1 if fixed width due to active adjacent parsing 2662 */ 2663 protected NumberPrinterParser(TemporalField field, int minWidth, int maxWidth, SignStyle signStyle, int subsequentWidth) { 2664 // validated by caller 2665 this.field = field; 2666 this.minWidth = minWidth; 2667 this.maxWidth = maxWidth; 2668 this.signStyle = signStyle; 2669 this.subsequentWidth = subsequentWidth; 2670 } 2671 2672 /** 2673 * Returns a new instance with fixed width flag set. 2674 * 2675 * @return a new updated printer-parser, not null 2676 */ 2677 NumberPrinterParser withFixedWidth() { 2678 if (subsequentWidth == -1) { 2679 return this; 2680 } 2681 return new NumberPrinterParser(field, minWidth, maxWidth, signStyle, -1); 2682 } 2683 2684 /** 2685 * Returns a new instance with an updated subsequent width. 2686 * 2687 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater 2688 * @return a new updated printer-parser, not null 2689 */ 2690 NumberPrinterParser withSubsequentWidth(int subsequentWidth) { 2691 return new NumberPrinterParser(field, minWidth, maxWidth, signStyle, this.subsequentWidth + subsequentWidth); 2692 } 2693 2694 @Override 2695 public boolean format(DateTimePrintContext context, StringBuilder buf) { 2696 Long valueLong = context.getValue(field); 2697 if (valueLong == null) { 2698 return false; 2699 } 2700 long value = getValue(context, valueLong); 2701 DecimalStyle decimalStyle = context.getDecimalStyle(); 2702 String str = (value == Long.MIN_VALUE ? "9223372036854775808" : Long.toString(Math.abs(value))); 2703 if (str.length() > maxWidth) { 2704 throw new DateTimeException("Field " + field + 2705 " cannot be printed as the value " + value + 2706 " exceeds the maximum print width of " + maxWidth); 2707 } 2708 str = decimalStyle.convertNumberToI18N(str); 2709 2710 if (value >= 0) { 2711 switch (signStyle) { 2712 case EXCEEDS_PAD: 2713 if (minWidth < 19 && value >= EXCEED_POINTS[minWidth]) { 2714 buf.append(decimalStyle.getPositiveSign()); 2715 } 2716 break; 2717 case ALWAYS: 2718 buf.append(decimalStyle.getPositiveSign()); 2719 break; 2720 } 2721 } else { 2722 switch (signStyle) { 2723 case NORMAL: 2724 case EXCEEDS_PAD: 2725 case ALWAYS: 2726 buf.append(decimalStyle.getNegativeSign()); 2727 break; 2728 case NOT_NEGATIVE: 2729 throw new DateTimeException("Field " + field + 2730 " cannot be printed as the value " + value + 2731 " cannot be negative according to the SignStyle"); 2732 } 2733 } 2734 for (int i = 0; i < minWidth - str.length(); i++) { 2735 buf.append(decimalStyle.getZeroDigit()); 2736 } 2737 buf.append(str); 2738 return true; 2739 } 2740 2741 /** 2742 * Gets the value to output. 2743 * 2744 * @param context the context 2745 * @param value the value of the field, not null 2746 * @return the value 2747 */ 2748 long getValue(DateTimePrintContext context, long value) { 2749 return value; 2750 } 2751 2752 /** 2753 * For NumberPrinterParser, the width is fixed depending on the 2754 * minWidth, maxWidth, signStyle and whether subsequent fields are fixed. 2755 * @param context the context 2756 * @return true if the field is fixed width 2757 * @see DateTimeFormatterBuilder#appendValue(java.time.temporal.TemporalField, int) 2758 */ 2759 boolean isFixedWidth(DateTimeParseContext context) { 2760 return subsequentWidth == -1 || 2761 (subsequentWidth > 0 && minWidth == maxWidth && signStyle == SignStyle.NOT_NEGATIVE); 2762 } 2763 2764 @Override 2765 public int parse(DateTimeParseContext context, CharSequence text, int position) { 2766 int length = text.length(); 2767 if (position == length) { 2768 return ~position; 2769 } 2770 char sign = text.charAt(position); // IOOBE if invalid position 2771 boolean negative = false; 2772 boolean positive = false; 2773 if (sign == context.getDecimalStyle().getPositiveSign()) { 2774 if (signStyle.parse(true, context.isStrict(), minWidth == maxWidth) == false) { 2775 return ~position; 2776 } 2777 positive = true; 2778 position++; 2779 } else if (sign == context.getDecimalStyle().getNegativeSign()) { 2780 if (signStyle.parse(false, context.isStrict(), minWidth == maxWidth) == false) { 2781 return ~position; 2782 } 2783 negative = true; 2784 position++; 2785 } else { 2786 if (signStyle == SignStyle.ALWAYS && context.isStrict()) { 2787 return ~position; 2788 } 2789 } 2790 int effMinWidth = (context.isStrict() || isFixedWidth(context) ? minWidth : 1); 2791 int minEndPos = position + effMinWidth; 2792 if (minEndPos > length) { 2793 return ~position; 2794 } 2795 int effMaxWidth = (context.isStrict() || isFixedWidth(context) ? maxWidth : 9) + Math.max(subsequentWidth, 0); 2796 long total = 0; 2797 BigInteger totalBig = null; 2798 int pos = position; 2799 for (int pass = 0; pass < 2; pass++) { 2800 int maxEndPos = Math.min(pos + effMaxWidth, length); 2801 while (pos < maxEndPos) { 2802 char ch = text.charAt(pos++); 2803 int digit = context.getDecimalStyle().convertToDigit(ch); 2804 if (digit < 0) { 2805 pos--; 2806 if (pos < minEndPos) { 2807 return ~position; // need at least min width digits 2808 } 2809 break; 2810 } 2811 if ((pos - position) > 18) { 2812 if (totalBig == null) { 2813 totalBig = BigInteger.valueOf(total); 2814 } 2815 totalBig = totalBig.multiply(BigInteger.TEN).add(BigInteger.valueOf(digit)); 2816 } else { 2817 total = total * 10 + digit; 2818 } 2819 } 2820 if (subsequentWidth > 0 && pass == 0) { 2821 // re-parse now we know the correct width 2822 int parseLen = pos - position; 2823 effMaxWidth = Math.max(effMinWidth, parseLen - subsequentWidth); 2824 pos = position; 2825 total = 0; 2826 totalBig = null; 2827 } else { 2828 break; 2829 } 2830 } 2831 if (negative) { 2832 if (totalBig != null) { 2833 if (totalBig.equals(BigInteger.ZERO) && context.isStrict()) { 2834 return ~(position - 1); // minus zero not allowed 2835 } 2836 totalBig = totalBig.negate(); 2837 } else { 2838 if (total == 0 && context.isStrict()) { 2839 return ~(position - 1); // minus zero not allowed 2840 } 2841 total = -total; 2842 } 2843 } else if (signStyle == SignStyle.EXCEEDS_PAD && context.isStrict()) { 2844 int parseLen = pos - position; 2845 if (positive) { 2846 if (parseLen <= minWidth) { 2847 return ~(position - 1); // '+' only parsed if minWidth exceeded 2848 } 2849 } else { 2850 if (parseLen > minWidth) { 2851 return ~position; // '+' must be parsed if minWidth exceeded 2852 } 2853 } 2854 } 2855 if (totalBig != null) { 2856 if (totalBig.bitLength() > 63) { 2857 // overflow, parse 1 less digit 2858 totalBig = totalBig.divide(BigInteger.TEN); 2859 pos--; 2860 } 2861 return setValue(context, totalBig.longValue(), position, pos); 2862 } 2863 return setValue(context, total, position, pos); 2864 } 2865 2866 /** 2867 * Stores the value. 2868 * 2869 * @param context the context to store into, not null 2870 * @param value the value 2871 * @param errorPos the position of the field being parsed 2872 * @param successPos the position after the field being parsed 2873 * @return the new position 2874 */ 2875 int setValue(DateTimeParseContext context, long value, int errorPos, int successPos) { 2876 return context.setParsedField(field, value, errorPos, successPos); 2877 } 2878 2879 @Override 2880 public String toString() { 2881 if (minWidth == 1 && maxWidth == 19 && signStyle == SignStyle.NORMAL) { 2882 return "Value(" + field + ")"; 2883 } 2884 if (minWidth == maxWidth && signStyle == SignStyle.NOT_NEGATIVE) { 2885 return "Value(" + field + "," + minWidth + ")"; 2886 } 2887 return "Value(" + field + "," + minWidth + "," + maxWidth + "," + signStyle + ")"; 2888 } 2889 } 2890 2891 //----------------------------------------------------------------------- 2892 /** 2893 * Prints and parses a reduced numeric date-time field. 2894 */ 2895 static final class ReducedPrinterParser extends NumberPrinterParser { 2896 /** 2897 * The base date for reduced value parsing. 2898 */ 2899 static final LocalDate BASE_DATE = LocalDate.of(2000, 1, 1); 2900 2901 private final int baseValue; 2902 private final ChronoLocalDate baseDate; 2903 2904 /** 2905 * Constructor. 2906 * 2907 * @param field the field to format, validated not null 2908 * @param minWidth the minimum field width, from 1 to 10 2909 * @param maxWidth the maximum field width, from 1 to 10 2910 * @param baseValue the base value 2911 * @param baseDate the base date 2912 */ 2913 ReducedPrinterParser(TemporalField field, int minWidth, int maxWidth, 2914 int baseValue, ChronoLocalDate baseDate) { 2915 this(field, minWidth, maxWidth, baseValue, baseDate, 0); 2916 if (minWidth < 1 || minWidth > 10) { 2917 throw new IllegalArgumentException("The minWidth must be from 1 to 10 inclusive but was " + minWidth); 2918 } 2919 if (maxWidth < 1 || maxWidth > 10) { 2920 throw new IllegalArgumentException("The maxWidth must be from 1 to 10 inclusive but was " + minWidth); 2921 } 2922 if (maxWidth < minWidth) { 2923 throw new IllegalArgumentException("Maximum width must exceed or equal the minimum width but " + 2924 maxWidth + " < " + minWidth); 2925 } 2926 if (baseDate == null) { 2927 if (field.range().isValidValue(baseValue) == false) { 2928 throw new IllegalArgumentException("The base value must be within the range of the field"); 2929 } 2930 if ((((long) baseValue) + EXCEED_POINTS[maxWidth]) > Integer.MAX_VALUE) { 2931 throw new DateTimeException("Unable to add printer-parser as the range exceeds the capacity of an int"); 2932 } 2933 } 2934 } 2935 2936 /** 2937 * Constructor. 2938 * The arguments have already been checked. 2939 * 2940 * @param field the field to format, validated not null 2941 * @param minWidth the minimum field width, from 1 to 10 2942 * @param maxWidth the maximum field width, from 1 to 10 2943 * @param baseValue the base value 2944 * @param baseDate the base date 2945 * @param subsequentWidth the subsequentWidth for this instance 2946 */ 2947 private ReducedPrinterParser(TemporalField field, int minWidth, int maxWidth, 2948 int baseValue, ChronoLocalDate baseDate, int subsequentWidth) { 2949 super(field, minWidth, maxWidth, SignStyle.NOT_NEGATIVE, subsequentWidth); 2950 this.baseValue = baseValue; 2951 this.baseDate = baseDate; 2952 } 2953 2954 @Override 2955 long getValue(DateTimePrintContext context, long value) { 2956 long absValue = Math.abs(value); 2957 int baseValue = this.baseValue; 2958 if (baseDate != null) { 2959 Chronology chrono = Chronology.from(context.getTemporal()); 2960 baseValue = chrono.date(baseDate).get(field); 2961 } 2962 if (value >= baseValue && value < baseValue + EXCEED_POINTS[minWidth]) { 2963 // Use the reduced value if it fits in minWidth 2964 return absValue % EXCEED_POINTS[minWidth]; 2965 } 2966 // Otherwise truncate to fit in maxWidth 2967 return absValue % EXCEED_POINTS[maxWidth]; 2968 } 2969 2970 @Override 2971 int setValue(DateTimeParseContext context, long value, int errorPos, int successPos) { 2972 int baseValue = this.baseValue; 2973 if (baseDate != null) { 2974 Chronology chrono = context.getEffectiveChronology(); 2975 baseValue = chrono.date(baseDate).get(field); 2976 2977 // In case the Chronology is changed later, add a callback when/if it changes 2978 final long initialValue = value; 2979 context.addChronoChangedListener( 2980 (_unused) -> { 2981 /* Repeat the set of the field using the current Chronology 2982 * The success/error position is ignored because the value is 2983 * intentionally being overwritten. 2984 */ 2985 setValue(context, initialValue, errorPos, successPos); 2986 }); 2987 } 2988 int parseLen = successPos - errorPos; 2989 if (parseLen == minWidth && value >= 0) { 2990 long range = EXCEED_POINTS[minWidth]; 2991 long lastPart = baseValue % range; 2992 long basePart = baseValue - lastPart; 2993 if (baseValue > 0) { 2994 value = basePart + value; 2995 } else { 2996 value = basePart - value; 2997 } 2998 if (value < baseValue) { 2999 value += range; 3000 } 3001 } 3002 return context.setParsedField(field, value, errorPos, successPos); 3003 } 3004 3005 /** 3006 * Returns a new instance with fixed width flag set. 3007 * 3008 * @return a new updated printer-parser, not null 3009 */ 3010 @Override 3011 ReducedPrinterParser withFixedWidth() { 3012 if (subsequentWidth == -1) { 3013 return this; 3014 } 3015 return new ReducedPrinterParser(field, minWidth, maxWidth, baseValue, baseDate, -1); 3016 } 3017 3018 /** 3019 * Returns a new instance with an updated subsequent width. 3020 * 3021 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater 3022 * @return a new updated printer-parser, not null 3023 */ 3024 @Override 3025 ReducedPrinterParser withSubsequentWidth(int subsequentWidth) { 3026 return new ReducedPrinterParser(field, minWidth, maxWidth, baseValue, baseDate, 3027 this.subsequentWidth + subsequentWidth); 3028 } 3029 3030 /** 3031 * For a ReducedPrinterParser, fixed width is false if the mode is strict, 3032 * otherwise it is set as for NumberPrinterParser. 3033 * @param context the context 3034 * @return if the field is fixed width 3035 * @see DateTimeFormatterBuilder#appendValueReduced(java.time.temporal.TemporalField, int, int, int) 3036 */ 3037 @Override 3038 boolean isFixedWidth(DateTimeParseContext context) { 3039 if (context.isStrict() == false) { 3040 return false; 3041 } 3042 return super.isFixedWidth(context); 3043 } 3044 3045 @Override 3046 public String toString() { 3047 return "ReducedValue(" + field + "," + minWidth + "," + maxWidth + 3048 "," + Objects.requireNonNullElse(baseDate, baseValue) + ")"; 3049 } 3050 } 3051 3052 //----------------------------------------------------------------------- 3053 /** 3054 * Prints and parses a numeric date-time field with optional padding. 3055 */ 3056 static final class FractionPrinterParser extends NumberPrinterParser { 3057 private final boolean decimalPoint; 3058 3059 /** 3060 * Constructor. 3061 * 3062 * @param field the field to output, not null 3063 * @param minWidth the minimum width to output, from 0 to 9 3064 * @param maxWidth the maximum width to output, from 0 to 9 3065 * @param decimalPoint whether to output the localized decimal point symbol 3066 */ 3067 FractionPrinterParser(TemporalField field, int minWidth, int maxWidth, boolean decimalPoint) { 3068 this(field, minWidth, maxWidth, decimalPoint, 0); 3069 Objects.requireNonNull(field, "field"); 3070 if (field.range().isFixed() == false) { 3071 throw new IllegalArgumentException("Field must have a fixed set of values: " + field); 3072 } 3073 if (minWidth < 0 || minWidth > 9) { 3074 throw new IllegalArgumentException("Minimum width must be from 0 to 9 inclusive but was " + minWidth); 3075 } 3076 if (maxWidth < 1 || maxWidth > 9) { 3077 throw new IllegalArgumentException("Maximum width must be from 1 to 9 inclusive but was " + maxWidth); 3078 } 3079 if (maxWidth < minWidth) { 3080 throw new IllegalArgumentException("Maximum width must exceed or equal the minimum width but " + 3081 maxWidth + " < " + minWidth); 3082 } 3083 } 3084 3085 /** 3086 * Constructor. 3087 * 3088 * @param field the field to output, not null 3089 * @param minWidth the minimum width to output, from 0 to 9 3090 * @param maxWidth the maximum width to output, from 0 to 9 3091 * @param decimalPoint whether to output the localized decimal point symbol 3092 * @param subsequentWidth the subsequentWidth for this instance 3093 */ 3094 FractionPrinterParser(TemporalField field, int minWidth, int maxWidth, boolean decimalPoint, int subsequentWidth) { 3095 super(field, minWidth, maxWidth, SignStyle.NOT_NEGATIVE, subsequentWidth); 3096 this.decimalPoint = decimalPoint; 3097 } 3098 3099 /** 3100 * Returns a new instance with fixed width flag set. 3101 * 3102 * @return a new updated printer-parser, not null 3103 */ 3104 @Override 3105 FractionPrinterParser withFixedWidth() { 3106 if (subsequentWidth == -1) { 3107 return this; 3108 } 3109 return new FractionPrinterParser(field, minWidth, maxWidth, decimalPoint, -1); 3110 } 3111 3112 /** 3113 * Returns a new instance with an updated subsequent width. 3114 * 3115 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater 3116 * @return a new updated printer-parser, not null 3117 */ 3118 @Override 3119 FractionPrinterParser withSubsequentWidth(int subsequentWidth) { 3120 return new FractionPrinterParser(field, minWidth, maxWidth, decimalPoint, this.subsequentWidth + subsequentWidth); 3121 } 3122 3123 /** 3124 * For FractionPrinterPrinterParser, the width is fixed if context is sttrict, 3125 * minWidth equal to maxWidth and decimalpoint is absent. 3126 * @param context the context 3127 * @return if the field is fixed width 3128 * @see DateTimeFormatterBuilder#appendValueFraction(java.time.temporal.TemporalField, int, int, boolean) 3129 */ 3130 @Override 3131 boolean isFixedWidth(DateTimeParseContext context) { 3132 if (context.isStrict() && minWidth == maxWidth && decimalPoint == false) { 3133 return true; 3134 } 3135 return false; 3136 } 3137 3138 @Override 3139 public boolean format(DateTimePrintContext context, StringBuilder buf) { 3140 Long value = context.getValue(field); 3141 if (value == null) { 3142 return false; 3143 } 3144 DecimalStyle decimalStyle = context.getDecimalStyle(); 3145 BigDecimal fraction = convertToFraction(value); 3146 if (fraction.scale() == 0) { // scale is zero if value is zero 3147 if (minWidth > 0) { 3148 if (decimalPoint) { 3149 buf.append(decimalStyle.getDecimalSeparator()); 3150 } 3151 for (int i = 0; i < minWidth; i++) { 3152 buf.append(decimalStyle.getZeroDigit()); 3153 } 3154 } 3155 } else { 3156 int outputScale = Math.min(Math.max(fraction.scale(), minWidth), maxWidth); 3157 fraction = fraction.setScale(outputScale, RoundingMode.FLOOR); 3158 String str = fraction.toPlainString().substring(2); 3159 str = decimalStyle.convertNumberToI18N(str); 3160 if (decimalPoint) { 3161 buf.append(decimalStyle.getDecimalSeparator()); 3162 } 3163 buf.append(str); 3164 } 3165 return true; 3166 } 3167 3168 @Override 3169 public int parse(DateTimeParseContext context, CharSequence text, int position) { 3170 int effectiveMin = (context.isStrict() || isFixedWidth(context) ? minWidth : 0); 3171 int effectiveMax = (context.isStrict() || isFixedWidth(context) ? maxWidth : 9); 3172 int length = text.length(); 3173 if (position == length) { 3174 // valid if whole field is optional, invalid if minimum width 3175 return (effectiveMin > 0 ? ~position : position); 3176 } 3177 if (decimalPoint) { 3178 if (text.charAt(position) != context.getDecimalStyle().getDecimalSeparator()) { 3179 // valid if whole field is optional, invalid if minimum width 3180 return (effectiveMin > 0 ? ~position : position); 3181 } 3182 position++; 3183 } 3184 int minEndPos = position + effectiveMin; 3185 if (minEndPos > length) { 3186 return ~position; // need at least min width digits 3187 } 3188 int maxEndPos = Math.min(position + effectiveMax, length); 3189 int total = 0; // can use int because we are only parsing up to 9 digits 3190 int pos = position; 3191 while (pos < maxEndPos) { 3192 char ch = text.charAt(pos++); 3193 int digit = context.getDecimalStyle().convertToDigit(ch); 3194 if (digit < 0) { 3195 if (pos < minEndPos) { 3196 return ~position; // need at least min width digits 3197 } 3198 pos--; 3199 break; 3200 } 3201 total = total * 10 + digit; 3202 } 3203 BigDecimal fraction = new BigDecimal(total).movePointLeft(pos - position); 3204 long value = convertFromFraction(fraction); 3205 return context.setParsedField(field, value, position, pos); 3206 } 3207 3208 /** 3209 * Converts a value for this field to a fraction between 0 and 1. 3210 * <p> 3211 * The fractional value is between 0 (inclusive) and 1 (exclusive). 3212 * It can only be returned if the {@link java.time.temporal.TemporalField#range() value range} is fixed. 3213 * The fraction is obtained by calculation from the field range using 9 decimal 3214 * places and a rounding mode of {@link RoundingMode#FLOOR FLOOR}. 3215 * The calculation is inaccurate if the values do not run continuously from smallest to largest. 3216 * <p> 3217 * For example, the second-of-minute value of 15 would be returned as 0.25, 3218 * assuming the standard definition of 60 seconds in a minute. 3219 * 3220 * @param value the value to convert, must be valid for this rule 3221 * @return the value as a fraction within the range, from 0 to 1, not null 3222 * @throws DateTimeException if the value cannot be converted to a fraction 3223 */ 3224 private BigDecimal convertToFraction(long value) { 3225 ValueRange range = field.range(); 3226 range.checkValidValue(value, field); 3227 BigDecimal minBD = BigDecimal.valueOf(range.getMinimum()); 3228 BigDecimal rangeBD = BigDecimal.valueOf(range.getMaximum()).subtract(minBD).add(BigDecimal.ONE); 3229 BigDecimal valueBD = BigDecimal.valueOf(value).subtract(minBD); 3230 BigDecimal fraction = valueBD.divide(rangeBD, 9, RoundingMode.FLOOR); 3231 // stripTrailingZeros bug 3232 return fraction.compareTo(BigDecimal.ZERO) == 0 ? BigDecimal.ZERO : fraction.stripTrailingZeros(); 3233 } 3234 3235 /** 3236 * Converts a fraction from 0 to 1 for this field to a value. 3237 * <p> 3238 * The fractional value must be between 0 (inclusive) and 1 (exclusive). 3239 * It can only be returned if the {@link java.time.temporal.TemporalField#range() value range} is fixed. 3240 * The value is obtained by calculation from the field range and a rounding 3241 * mode of {@link RoundingMode#FLOOR FLOOR}. 3242 * The calculation is inaccurate if the values do not run continuously from smallest to largest. 3243 * <p> 3244 * For example, the fractional second-of-minute of 0.25 would be converted to 15, 3245 * assuming the standard definition of 60 seconds in a minute. 3246 * 3247 * @param fraction the fraction to convert, not null 3248 * @return the value of the field, valid for this rule 3249 * @throws DateTimeException if the value cannot be converted 3250 */ 3251 private long convertFromFraction(BigDecimal fraction) { 3252 ValueRange range = field.range(); 3253 BigDecimal minBD = BigDecimal.valueOf(range.getMinimum()); 3254 BigDecimal rangeBD = BigDecimal.valueOf(range.getMaximum()).subtract(minBD).add(BigDecimal.ONE); 3255 BigDecimal valueBD = fraction.multiply(rangeBD).setScale(0, RoundingMode.FLOOR).add(minBD); 3256 return valueBD.longValueExact(); 3257 } 3258 3259 @Override 3260 public String toString() { 3261 String decimal = (decimalPoint ? ",DecimalPoint" : ""); 3262 return "Fraction(" + field + "," + minWidth + "," + maxWidth + decimal + ")"; 3263 } 3264 } 3265 3266 //----------------------------------------------------------------------- 3267 /** 3268 * Prints or parses field text. 3269 */ 3270 static final class TextPrinterParser implements DateTimePrinterParser { 3271 private final TemporalField field; 3272 private final TextStyle textStyle; 3273 private final DateTimeTextProvider provider; 3274 /** 3275 * The cached number printer parser. 3276 * Immutable and volatile, so no synchronization needed. 3277 */ 3278 private volatile NumberPrinterParser numberPrinterParser; 3279 3280 /** 3281 * Constructor. 3282 * 3283 * @param field the field to output, not null 3284 * @param textStyle the text style, not null 3285 * @param provider the text provider, not null 3286 */ 3287 TextPrinterParser(TemporalField field, TextStyle textStyle, DateTimeTextProvider provider) { 3288 // validated by caller 3289 this.field = field; 3290 this.textStyle = textStyle; 3291 this.provider = provider; 3292 } 3293 3294 @Override 3295 public boolean format(DateTimePrintContext context, StringBuilder buf) { 3296 Long value = context.getValue(field); 3297 if (value == null) { 3298 return false; 3299 } 3300 String text; 3301 Chronology chrono = context.getTemporal().query(TemporalQueries.chronology()); 3302 if (chrono == null || chrono == IsoChronology.INSTANCE) { 3303 text = provider.getText(field, value, textStyle, context.getLocale()); 3304 } else { 3305 text = provider.getText(chrono, field, value, textStyle, context.getLocale()); 3306 } 3307 if (text == null) { 3308 return numberPrinterParser().format(context, buf); 3309 } 3310 buf.append(text); 3311 return true; 3312 } 3313 3314 @Override 3315 public int parse(DateTimeParseContext context, CharSequence parseText, int position) { 3316 int length = parseText.length(); 3317 if (position < 0 || position > length) { 3318 throw new IndexOutOfBoundsException(); 3319 } 3320 TextStyle style = (context.isStrict() ? textStyle : null); 3321 Chronology chrono = context.getEffectiveChronology(); 3322 Iterator<Entry<String, Long>> it; 3323 if (chrono == null || chrono == IsoChronology.INSTANCE) { 3324 it = provider.getTextIterator(field, style, context.getLocale()); 3325 } else { 3326 it = provider.getTextIterator(chrono, field, style, context.getLocale()); 3327 } 3328 if (it != null) { 3329 while (it.hasNext()) { 3330 Entry<String, Long> entry = it.next(); 3331 String itText = entry.getKey(); 3332 if (context.subSequenceEquals(itText, 0, parseText, position, itText.length())) { 3333 return context.setParsedField(field, entry.getValue(), position, position + itText.length()); 3334 } 3335 } 3336 if (field == ERA && !context.isStrict()) { 3337 // parse the possible era name from era.toString() 3338 List<Era> eras = chrono.eras(); 3339 for (Era era : eras) { 3340 String name = era.toString(); 3341 if (context.subSequenceEquals(name, 0, parseText, position, name.length())) { 3342 return context.setParsedField(field, era.getValue(), position, position + name.length()); 3343 } 3344 } 3345 } 3346 if (context.isStrict()) { 3347 return ~position; 3348 } 3349 } 3350 return numberPrinterParser().parse(context, parseText, position); 3351 } 3352 3353 /** 3354 * Create and cache a number printer parser. 3355 * @return the number printer parser for this field, not null 3356 */ 3357 private NumberPrinterParser numberPrinterParser() { 3358 if (numberPrinterParser == null) { 3359 numberPrinterParser = new NumberPrinterParser(field, 1, 19, SignStyle.NORMAL); 3360 } 3361 return numberPrinterParser; 3362 } 3363 3364 @Override 3365 public String toString() { 3366 if (textStyle == TextStyle.FULL) { 3367 return "Text(" + field + ")"; 3368 } 3369 return "Text(" + field + "," + textStyle + ")"; 3370 } 3371 } 3372 3373 //----------------------------------------------------------------------- 3374 /** 3375 * Prints or parses an ISO-8601 instant. 3376 */ 3377 static final class InstantPrinterParser implements DateTimePrinterParser { 3378 // days in a 400 year cycle = 146097 3379 // days in a 10,000 year cycle = 146097 * 25 3380 // seconds per day = 86400 3381 private static final long SECONDS_PER_10000_YEARS = 146097L * 25L * 86400L; 3382 private static final long SECONDS_0000_TO_1970 = ((146097L * 5L) - (30L * 365L + 7L)) * 86400L; 3383 private final int fractionalDigits; 3384 3385 InstantPrinterParser(int fractionalDigits) { 3386 this.fractionalDigits = fractionalDigits; 3387 } 3388 3389 @Override 3390 public boolean format(DateTimePrintContext context, StringBuilder buf) { 3391 // use INSTANT_SECONDS, thus this code is not bound by Instant.MAX 3392 Long inSecs = context.getValue(INSTANT_SECONDS); 3393 Long inNanos = null; 3394 if (context.getTemporal().isSupported(NANO_OF_SECOND)) { 3395 inNanos = context.getTemporal().getLong(NANO_OF_SECOND); 3396 } 3397 if (inSecs == null) { 3398 return false; 3399 } 3400 long inSec = inSecs; 3401 int inNano = NANO_OF_SECOND.checkValidIntValue(inNanos != null ? inNanos : 0); 3402 // format mostly using LocalDateTime.toString 3403 if (inSec >= -SECONDS_0000_TO_1970) { 3404 // current era 3405 long zeroSecs = inSec - SECONDS_PER_10000_YEARS + SECONDS_0000_TO_1970; 3406 long hi = Math.floorDiv(zeroSecs, SECONDS_PER_10000_YEARS) + 1; 3407 long lo = Math.floorMod(zeroSecs, SECONDS_PER_10000_YEARS); 3408 LocalDateTime ldt = LocalDateTime.ofEpochSecond(lo - SECONDS_0000_TO_1970, 0, ZoneOffset.UTC); 3409 if (hi > 0) { 3410 buf.append('+').append(hi); 3411 } 3412 buf.append(ldt); 3413 if (ldt.getSecond() == 0) { 3414 buf.append(":00"); 3415 } 3416 } else { 3417 // before current era 3418 long zeroSecs = inSec + SECONDS_0000_TO_1970; 3419 long hi = zeroSecs / SECONDS_PER_10000_YEARS; 3420 long lo = zeroSecs % SECONDS_PER_10000_YEARS; 3421 LocalDateTime ldt = LocalDateTime.ofEpochSecond(lo - SECONDS_0000_TO_1970, 0, ZoneOffset.UTC); 3422 int pos = buf.length(); 3423 buf.append(ldt); 3424 if (ldt.getSecond() == 0) { 3425 buf.append(":00"); 3426 } 3427 if (hi < 0) { 3428 if (ldt.getYear() == -10_000) { 3429 buf.replace(pos, pos + 2, Long.toString(hi - 1)); 3430 } else if (lo == 0) { 3431 buf.insert(pos, hi); 3432 } else { 3433 buf.insert(pos + 1, Math.abs(hi)); 3434 } 3435 } 3436 } 3437 // add fraction 3438 if ((fractionalDigits < 0 && inNano > 0) || fractionalDigits > 0) { 3439 buf.append('.'); 3440 int div = 100_000_000; 3441 for (int i = 0; ((fractionalDigits == -1 && inNano > 0) || 3442 (fractionalDigits == -2 && (inNano > 0 || (i % 3) != 0)) || 3443 i < fractionalDigits); i++) { 3444 int digit = inNano / div; 3445 buf.append((char) (digit + '0')); 3446 inNano = inNano - (digit * div); 3447 div = div / 10; 3448 } 3449 } 3450 buf.append('Z'); 3451 return true; 3452 } 3453 3454 @Override 3455 public int parse(DateTimeParseContext context, CharSequence text, int position) { 3456 // new context to avoid overwriting fields like year/month/day 3457 int minDigits = (fractionalDigits < 0 ? 0 : fractionalDigits); 3458 int maxDigits = (fractionalDigits < 0 ? 9 : fractionalDigits); 3459 CompositePrinterParser parser = new DateTimeFormatterBuilder() 3460 .append(DateTimeFormatter.ISO_LOCAL_DATE).appendLiteral('T') 3461 .appendValue(HOUR_OF_DAY, 2).appendLiteral(':') 3462 .appendValue(MINUTE_OF_HOUR, 2).appendLiteral(':') 3463 .appendValue(SECOND_OF_MINUTE, 2) 3464 .appendFraction(NANO_OF_SECOND, minDigits, maxDigits, true) 3465 .appendLiteral('Z') 3466 .toFormatter().toPrinterParser(false); 3467 DateTimeParseContext newContext = context.copy(); 3468 int pos = parser.parse(newContext, text, position); 3469 if (pos < 0) { 3470 return pos; 3471 } 3472 // parser restricts most fields to 2 digits, so definitely int 3473 // correctly parsed nano is also guaranteed to be valid 3474 long yearParsed = newContext.getParsed(YEAR); 3475 int month = newContext.getParsed(MONTH_OF_YEAR).intValue(); 3476 int day = newContext.getParsed(DAY_OF_MONTH).intValue(); 3477 int hour = newContext.getParsed(HOUR_OF_DAY).intValue(); 3478 int min = newContext.getParsed(MINUTE_OF_HOUR).intValue(); 3479 Long secVal = newContext.getParsed(SECOND_OF_MINUTE); 3480 Long nanoVal = newContext.getParsed(NANO_OF_SECOND); 3481 int sec = (secVal != null ? secVal.intValue() : 0); 3482 int nano = (nanoVal != null ? nanoVal.intValue() : 0); 3483 int days = 0; 3484 if (hour == 24 && min == 0 && sec == 0 && nano == 0) { 3485 hour = 0; 3486 days = 1; 3487 } else if (hour == 23 && min == 59 && sec == 60) { 3488 context.setParsedLeapSecond(); 3489 sec = 59; 3490 } 3491 int year = (int) yearParsed % 10_000; 3492 long instantSecs; 3493 try { 3494 LocalDateTime ldt = LocalDateTime.of(year, month, day, hour, min, sec, 0).plusDays(days); 3495 instantSecs = ldt.toEpochSecond(ZoneOffset.UTC); 3496 instantSecs += Math.multiplyExact(yearParsed / 10_000L, SECONDS_PER_10000_YEARS); 3497 } catch (RuntimeException ex) { 3498 return ~position; 3499 } 3500 int successPos = pos; 3501 successPos = context.setParsedField(INSTANT_SECONDS, instantSecs, position, successPos); 3502 return context.setParsedField(NANO_OF_SECOND, nano, position, successPos); 3503 } 3504 3505 @Override 3506 public String toString() { 3507 return "Instant()"; 3508 } 3509 } 3510 3511 //----------------------------------------------------------------------- 3512 /** 3513 * Prints or parses an offset ID. 3514 */ 3515 static final class OffsetIdPrinterParser implements DateTimePrinterParser { 3516 static final String[] PATTERNS = new String[] { 3517 "+HH", "+HHmm", "+HH:mm", "+HHMM", "+HH:MM", "+HHMMss", "+HH:MM:ss", "+HHMMSS", "+HH:MM:SS", "+HHmmss", "+HH:mm:ss", 3518 "+H", "+Hmm", "+H:mm", "+HMM", "+H:MM", "+HMMss", "+H:MM:ss", "+HMMSS", "+H:MM:SS", "+Hmmss", "+H:mm:ss", 3519 }; // order used in pattern builder 3520 static final OffsetIdPrinterParser INSTANCE_ID_Z = new OffsetIdPrinterParser("+HH:MM:ss", "Z"); 3521 static final OffsetIdPrinterParser INSTANCE_ID_ZERO = new OffsetIdPrinterParser("+HH:MM:ss", "0"); 3522 3523 private final String noOffsetText; 3524 private final int type; 3525 private final int style; 3526 3527 /** 3528 * Constructor. 3529 * 3530 * @param pattern the pattern 3531 * @param noOffsetText the text to use for UTC, not null 3532 */ 3533 OffsetIdPrinterParser(String pattern, String noOffsetText) { 3534 Objects.requireNonNull(pattern, "pattern"); 3535 Objects.requireNonNull(noOffsetText, "noOffsetText"); 3536 this.type = checkPattern(pattern); 3537 this.style = type % 11; 3538 this.noOffsetText = noOffsetText; 3539 } 3540 3541 private int checkPattern(String pattern) { 3542 for (int i = 0; i < PATTERNS.length; i++) { 3543 if (PATTERNS[i].equals(pattern)) { 3544 return i; 3545 } 3546 } 3547 throw new IllegalArgumentException("Invalid zone offset pattern: " + pattern); 3548 } 3549 3550 private boolean isPaddedHour() { 3551 return type < 11; 3552 } 3553 3554 private boolean isColon() { 3555 return style > 0 && (style % 2) == 0; 3556 } 3557 3558 @Override 3559 public boolean format(DateTimePrintContext context, StringBuilder buf) { 3560 Long offsetSecs = context.getValue(OFFSET_SECONDS); 3561 if (offsetSecs == null) { 3562 return false; 3563 } 3564 int totalSecs = Math.toIntExact(offsetSecs); 3565 if (totalSecs == 0) { 3566 buf.append(noOffsetText); 3567 } else { 3568 int absHours = Math.abs((totalSecs / 3600) % 100); // anything larger than 99 silently dropped 3569 int absMinutes = Math.abs((totalSecs / 60) % 60); 3570 int absSeconds = Math.abs(totalSecs % 60); 3571 int bufPos = buf.length(); 3572 int output = absHours; 3573 buf.append(totalSecs < 0 ? "-" : "+"); 3574 if (isPaddedHour() || absHours >= 10) { 3575 formatZeroPad(false, absHours, buf); 3576 } else { 3577 buf.append((char) (absHours + '0')); 3578 } 3579 if ((style >= 3 && style <= 8) || (style >= 9 && absSeconds > 0) || (style >= 1 && absMinutes > 0)) { 3580 formatZeroPad(isColon(), absMinutes, buf); 3581 output += absMinutes; 3582 if (style == 7 || style == 8 || (style >= 5 && absSeconds > 0)) { 3583 formatZeroPad(isColon(), absSeconds, buf); 3584 output += absSeconds; 3585 } 3586 } 3587 if (output == 0) { 3588 buf.setLength(bufPos); 3589 buf.append(noOffsetText); 3590 } 3591 } 3592 return true; 3593 } 3594 3595 private void formatZeroPad(boolean colon, int value, StringBuilder buf) { 3596 buf.append(colon ? ":" : "") 3597 .append((char) (value / 10 + '0')) 3598 .append((char) (value % 10 + '0')); 3599 } 3600 3601 @Override 3602 public int parse(DateTimeParseContext context, CharSequence text, int position) { 3603 int length = text.length(); 3604 int noOffsetLen = noOffsetText.length(); 3605 if (noOffsetLen == 0) { 3606 if (position == length) { 3607 return context.setParsedField(OFFSET_SECONDS, 0, position, position); 3608 } 3609 } else { 3610 if (position == length) { 3611 return ~position; 3612 } 3613 if (context.subSequenceEquals(text, position, noOffsetText, 0, noOffsetLen)) { 3614 return context.setParsedField(OFFSET_SECONDS, 0, position, position + noOffsetLen); 3615 } 3616 } 3617 3618 // parse normal plus/minus offset 3619 char sign = text.charAt(position); // IOOBE if invalid position 3620 if (sign == '+' || sign == '-') { 3621 // starts 3622 int negative = (sign == '-' ? -1 : 1); 3623 boolean isColon = isColon(); 3624 boolean paddedHour = isPaddedHour(); 3625 int[] array = new int[4]; 3626 array[0] = position + 1; 3627 int parseType = type; 3628 // select parse type when lenient 3629 if (!context.isStrict()) { 3630 if (paddedHour) { 3631 if (isColon || (parseType == 0 && length > position + 3 && text.charAt(position + 3) == ':')) { 3632 isColon = true; // needed in cases like ("+HH", "+01:01") 3633 parseType = 10; 3634 } else { 3635 parseType = 9; 3636 } 3637 } else { 3638 if (isColon || (parseType == 11 && length > position + 3 && (text.charAt(position + 2) == ':' || text.charAt(position + 3) == ':'))) { 3639 isColon = true; 3640 parseType = 21; // needed in cases like ("+H", "+1:01") 3641 } else { 3642 parseType = 20; 3643 } 3644 } 3645 } 3646 // parse according to the selected pattern 3647 switch (parseType) { 3648 case 0: // +HH 3649 case 11: // +H 3650 parseHour(text, paddedHour, array); 3651 break; 3652 case 1: // +HHmm 3653 case 2: // +HH:mm 3654 case 13: // +H:mm 3655 parseHour(text, paddedHour, array); 3656 parseMinute(text, isColon, false, array); 3657 break; 3658 case 3: // +HHMM 3659 case 4: // +HH:MM 3660 case 15: // +H:MM 3661 parseHour(text, paddedHour, array); 3662 parseMinute(text, isColon, true, array); 3663 break; 3664 case 5: // +HHMMss 3665 case 6: // +HH:MM:ss 3666 case 17: // +H:MM:ss 3667 parseHour(text, paddedHour, array); 3668 parseMinute(text, isColon, true, array); 3669 parseSecond(text, isColon, false, array); 3670 break; 3671 case 7: // +HHMMSS 3672 case 8: // +HH:MM:SS 3673 case 19: // +H:MM:SS 3674 parseHour(text, paddedHour, array); 3675 parseMinute(text, isColon, true, array); 3676 parseSecond(text, isColon, true, array); 3677 break; 3678 case 9: // +HHmmss 3679 case 10: // +HH:mm:ss 3680 case 21: // +H:mm:ss 3681 parseHour(text, paddedHour, array); 3682 parseOptionalMinuteSecond(text, isColon, array); 3683 break; 3684 case 12: // +Hmm 3685 parseVariableWidthDigits(text, 1, 4, array); 3686 break; 3687 case 14: // +HMM 3688 parseVariableWidthDigits(text, 3, 4, array); 3689 break; 3690 case 16: // +HMMss 3691 parseVariableWidthDigits(text, 3, 6, array); 3692 break; 3693 case 18: // +HMMSS 3694 parseVariableWidthDigits(text, 5, 6, array); 3695 break; 3696 case 20: // +Hmmss 3697 parseVariableWidthDigits(text, 1, 6, array); 3698 break; 3699 } 3700 if (array[0] > 0) { 3701 if (array[1] > 23 || array[2] > 59 || array[3] > 59) { 3702 throw new DateTimeException("Value out of range: Hour[0-23], Minute[0-59], Second[0-59]"); 3703 } 3704 long offsetSecs = negative * (array[1] * 3600L + array[2] * 60L + array[3]); 3705 return context.setParsedField(OFFSET_SECONDS, offsetSecs, position, array[0]); 3706 } 3707 } 3708 // handle special case of empty no offset text 3709 if (noOffsetLen == 0) { 3710 return context.setParsedField(OFFSET_SECONDS, 0, position, position); 3711 } 3712 return ~position; 3713 } 3714 3715 private void parseHour(CharSequence parseText, boolean paddedHour, int[] array) { 3716 if (paddedHour) { 3717 // parse two digits 3718 if (!parseDigits(parseText, false, 1, array)) { 3719 array[0] = ~array[0]; 3720 } 3721 } else { 3722 // parse one or two digits 3723 parseVariableWidthDigits(parseText, 1, 2, array); 3724 } 3725 } 3726 3727 private void parseMinute(CharSequence parseText, boolean isColon, boolean mandatory, int[] array) { 3728 if (!parseDigits(parseText, isColon, 2, array)) { 3729 if (mandatory) { 3730 array[0] = ~array[0]; 3731 } 3732 } 3733 } 3734 3735 private void parseSecond(CharSequence parseText, boolean isColon, boolean mandatory, int[] array) { 3736 if (!parseDigits(parseText, isColon, 3, array)) { 3737 if (mandatory) { 3738 array[0] = ~array[0]; 3739 } 3740 } 3741 } 3742 3743 private void parseOptionalMinuteSecond(CharSequence parseText, boolean isColon, int[] array) { 3744 if (parseDigits(parseText, isColon, 2, array)) { 3745 parseDigits(parseText, isColon, 3, array); 3746 } 3747 } 3748 3749 private boolean parseDigits(CharSequence parseText, boolean isColon, int arrayIndex, int[] array) { 3750 int pos = array[0]; 3751 if (pos < 0) { 3752 return true; 3753 } 3754 if (isColon && arrayIndex != 1) { // ':' will precede only in case of minute/second 3755 if (pos + 1 > parseText.length() || parseText.charAt(pos) != ':') { 3756 return false; 3757 } 3758 pos++; 3759 } 3760 if (pos + 2 > parseText.length()) { 3761 return false; 3762 } 3763 char ch1 = parseText.charAt(pos++); 3764 char ch2 = parseText.charAt(pos++); 3765 if (ch1 < '0' || ch1 > '9' || ch2 < '0' || ch2 > '9') { 3766 return false; 3767 } 3768 int value = (ch1 - 48) * 10 + (ch2 - 48); 3769 if (value < 0 || value > 59) { 3770 return false; 3771 } 3772 array[arrayIndex] = value; 3773 array[0] = pos; 3774 return true; 3775 } 3776 3777 private void parseVariableWidthDigits(CharSequence parseText, int minDigits, int maxDigits, int[] array) { 3778 // scan the text to find the available number of digits up to maxDigits 3779 // so long as the number available is minDigits or more, the input is valid 3780 // then parse the number of available digits 3781 int pos = array[0]; 3782 int available = 0; 3783 char[] chars = new char[maxDigits]; 3784 for (int i = 0; i < maxDigits; i++) { 3785 if (pos + 1 > parseText.length()) { 3786 break; 3787 } 3788 char ch = parseText.charAt(pos++); 3789 if (ch < '0' || ch > '9') { 3790 pos--; 3791 break; 3792 } 3793 chars[i] = ch; 3794 available++; 3795 } 3796 if (available < minDigits) { 3797 array[0] = ~array[0]; 3798 return; 3799 } 3800 switch (available) { 3801 case 1: 3802 array[1] = (chars[0] - 48); 3803 break; 3804 case 2: 3805 array[1] = ((chars[0] - 48) * 10 + (chars[1] - 48)); 3806 break; 3807 case 3: 3808 array[1] = (chars[0] - 48); 3809 array[2] = ((chars[1] - 48) * 10 + (chars[2] - 48)); 3810 break; 3811 case 4: 3812 array[1] = ((chars[0] - 48) * 10 + (chars[1] - 48)); 3813 array[2] = ((chars[2] - 48) * 10 + (chars[3] - 48)); 3814 break; 3815 case 5: 3816 array[1] = (chars[0] - 48); 3817 array[2] = ((chars[1] - 48) * 10 + (chars[2] - 48)); 3818 array[3] = ((chars[3] - 48) * 10 + (chars[4] - 48)); 3819 break; 3820 case 6: 3821 array[1] = ((chars[0] - 48) * 10 + (chars[1] - 48)); 3822 array[2] = ((chars[2] - 48) * 10 + (chars[3] - 48)); 3823 array[3] = ((chars[4] - 48) * 10 + (chars[5] - 48)); 3824 break; 3825 } 3826 array[0] = pos; 3827 } 3828 3829 @Override 3830 public String toString() { 3831 String converted = noOffsetText.replace("'", "''"); 3832 return "Offset(" + PATTERNS[type] + ",'" + converted + "')"; 3833 } 3834 } 3835 3836 //----------------------------------------------------------------------- 3837 /** 3838 * Prints or parses an offset ID. 3839 */ 3840 static final class LocalizedOffsetIdPrinterParser implements DateTimePrinterParser { 3841 private final TextStyle style; 3842 3843 /** 3844 * Constructor. 3845 * 3846 * @param style the style, not null 3847 */ 3848 LocalizedOffsetIdPrinterParser(TextStyle style) { 3849 this.style = style; 3850 } 3851 3852 private static StringBuilder appendHMS(StringBuilder buf, int t) { 3853 return buf.append((char)(t / 10 + '0')) 3854 .append((char)(t % 10 + '0')); 3855 } 3856 3857 @Override 3858 public boolean format(DateTimePrintContext context, StringBuilder buf) { 3859 Long offsetSecs = context.getValue(OFFSET_SECONDS); 3860 if (offsetSecs == null) { 3861 return false; 3862 } 3863 String gmtText = "GMT"; // TODO: get localized version of 'GMT' 3864 buf.append(gmtText); 3865 int totalSecs = Math.toIntExact(offsetSecs); 3866 if (totalSecs != 0) { 3867 int absHours = Math.abs((totalSecs / 3600) % 100); // anything larger than 99 silently dropped 3868 int absMinutes = Math.abs((totalSecs / 60) % 60); 3869 int absSeconds = Math.abs(totalSecs % 60); 3870 buf.append(totalSecs < 0 ? "-" : "+"); 3871 if (style == TextStyle.FULL) { 3872 appendHMS(buf, absHours); 3873 buf.append(':'); 3874 appendHMS(buf, absMinutes); 3875 if (absSeconds != 0) { 3876 buf.append(':'); 3877 appendHMS(buf, absSeconds); 3878 } 3879 } else { 3880 if (absHours >= 10) { 3881 buf.append((char)(absHours / 10 + '0')); 3882 } 3883 buf.append((char)(absHours % 10 + '0')); 3884 if (absMinutes != 0 || absSeconds != 0) { 3885 buf.append(':'); 3886 appendHMS(buf, absMinutes); 3887 if (absSeconds != 0) { 3888 buf.append(':'); 3889 appendHMS(buf, absSeconds); 3890 } 3891 } 3892 } 3893 } 3894 return true; 3895 } 3896 3897 int getDigit(CharSequence text, int position) { 3898 char c = text.charAt(position); 3899 if (c < '0' || c > '9') { 3900 return -1; 3901 } 3902 return c - '0'; 3903 } 3904 3905 @Override 3906 public int parse(DateTimeParseContext context, CharSequence text, int position) { 3907 int pos = position; 3908 int end = text.length(); 3909 String gmtText = "GMT"; // TODO: get localized version of 'GMT' 3910 if (!context.subSequenceEquals(text, pos, gmtText, 0, gmtText.length())) { 3911 return ~position; 3912 } 3913 pos += gmtText.length(); 3914 // parse normal plus/minus offset 3915 int negative = 0; 3916 if (pos == end) { 3917 return context.setParsedField(OFFSET_SECONDS, 0, position, pos); 3918 } 3919 char sign = text.charAt(pos); // IOOBE if invalid position 3920 if (sign == '+') { 3921 negative = 1; 3922 } else if (sign == '-') { 3923 negative = -1; 3924 } else { 3925 return context.setParsedField(OFFSET_SECONDS, 0, position, pos); 3926 } 3927 pos++; 3928 int h = 0; 3929 int m = 0; 3930 int s = 0; 3931 if (style == TextStyle.FULL) { 3932 int h1 = getDigit(text, pos++); 3933 int h2 = getDigit(text, pos++); 3934 if (h1 < 0 || h2 < 0 || text.charAt(pos++) != ':') { 3935 return ~position; 3936 } 3937 h = h1 * 10 + h2; 3938 int m1 = getDigit(text, pos++); 3939 int m2 = getDigit(text, pos++); 3940 if (m1 < 0 || m2 < 0) { 3941 return ~position; 3942 } 3943 m = m1 * 10 + m2; 3944 if (pos + 2 < end && text.charAt(pos) == ':') { 3945 int s1 = getDigit(text, pos + 1); 3946 int s2 = getDigit(text, pos + 2); 3947 if (s1 >= 0 && s2 >= 0) { 3948 s = s1 * 10 + s2; 3949 pos += 3; 3950 } 3951 } 3952 } else { 3953 h = getDigit(text, pos++); 3954 if (h < 0) { 3955 return ~position; 3956 } 3957 if (pos < end) { 3958 int h2 = getDigit(text, pos); 3959 if (h2 >=0) { 3960 h = h * 10 + h2; 3961 pos++; 3962 } 3963 if (pos + 2 < end && text.charAt(pos) == ':') { 3964 if (pos + 2 < end && text.charAt(pos) == ':') { 3965 int m1 = getDigit(text, pos + 1); 3966 int m2 = getDigit(text, pos + 2); 3967 if (m1 >= 0 && m2 >= 0) { 3968 m = m1 * 10 + m2; 3969 pos += 3; 3970 if (pos + 2 < end && text.charAt(pos) == ':') { 3971 int s1 = getDigit(text, pos + 1); 3972 int s2 = getDigit(text, pos + 2); 3973 if (s1 >= 0 && s2 >= 0) { 3974 s = s1 * 10 + s2; 3975 pos += 3; 3976 } 3977 } 3978 } 3979 } 3980 } 3981 } 3982 } 3983 long offsetSecs = negative * (h * 3600L + m * 60L + s); 3984 return context.setParsedField(OFFSET_SECONDS, offsetSecs, position, pos); 3985 } 3986 3987 @Override 3988 public String toString() { 3989 return "LocalizedOffset(" + style + ")"; 3990 } 3991 } 3992 3993 //----------------------------------------------------------------------- 3994 /** 3995 * Prints or parses a zone ID. 3996 */ 3997 static final class ZoneTextPrinterParser extends ZoneIdPrinterParser { 3998 3999 /** The text style to output. */ 4000 private final TextStyle textStyle; 4001 4002 /** The preferred zoneid map */ 4003 private Set<String> preferredZones; 4004 4005 /** Display in generic time-zone format. True in case of pattern letter 'v' */ 4006 private final boolean isGeneric; 4007 ZoneTextPrinterParser(TextStyle textStyle, Set<ZoneId> preferredZones, boolean isGeneric) { 4008 super(TemporalQueries.zone(), "ZoneText(" + textStyle + ")"); 4009 this.textStyle = Objects.requireNonNull(textStyle, "textStyle"); 4010 this.isGeneric = isGeneric; 4011 if (preferredZones != null && preferredZones.size() != 0) { 4012 this.preferredZones = new HashSet<>(); 4013 for (ZoneId id : preferredZones) { 4014 this.preferredZones.add(id.getId()); 4015 } 4016 } 4017 } 4018 4019 private static final int STD = 0; 4020 private static final int DST = 1; 4021 private static final int GENERIC = 2; 4022 private static final Map<String, SoftReference<Map<Locale, String[]>>> cache = 4023 new ConcurrentHashMap<>(); 4024 4025 private String getDisplayName(String id, int type, Locale locale) { 4026 if (textStyle == TextStyle.NARROW) { 4027 return null; 4028 } 4029 String[] names; 4030 SoftReference<Map<Locale, String[]>> ref = cache.get(id); 4031 Map<Locale, String[]> perLocale = null; 4032 if (ref == null || (perLocale = ref.get()) == null || 4033 (names = perLocale.get(locale)) == null) { 4034 names = TimeZoneNameUtility.retrieveDisplayNames(id, locale); 4035 if (names == null) { 4036 return null; 4037 } 4038 names = Arrays.copyOfRange(names, 0, 7); 4039 names[5] = 4040 TimeZoneNameUtility.retrieveGenericDisplayName(id, TimeZone.LONG, locale); 4041 if (names[5] == null) { 4042 names[5] = names[0]; // use the id 4043 } 4044 names[6] = 4045 TimeZoneNameUtility.retrieveGenericDisplayName(id, TimeZone.SHORT, locale); 4046 if (names[6] == null) { 4047 names[6] = names[0]; 4048 } 4049 if (perLocale == null) { 4050 perLocale = new ConcurrentHashMap<>(); 4051 } 4052 perLocale.put(locale, names); 4053 cache.put(id, new SoftReference<>(perLocale)); 4054 } 4055 switch (type) { 4056 case STD: 4057 return names[textStyle.zoneNameStyleIndex() + 1]; 4058 case DST: 4059 return names[textStyle.zoneNameStyleIndex() + 3]; 4060 } 4061 return names[textStyle.zoneNameStyleIndex() + 5]; 4062 } 4063 4064 @Override 4065 public boolean format(DateTimePrintContext context, StringBuilder buf) { 4066 ZoneId zone = context.getValue(TemporalQueries.zoneId()); 4067 if (zone == null) { 4068 return false; 4069 } 4070 String zname = zone.getId(); 4071 if (!(zone instanceof ZoneOffset)) { 4072 TemporalAccessor dt = context.getTemporal(); 4073 int type = GENERIC; 4074 if (!isGeneric) { 4075 if (dt.isSupported(ChronoField.INSTANT_SECONDS)) { 4076 type = zone.getRules().isDaylightSavings(Instant.from(dt)) ? DST : STD; 4077 } else if (dt.isSupported(ChronoField.EPOCH_DAY) && 4078 dt.isSupported(ChronoField.NANO_OF_DAY)) { 4079 LocalDate date = LocalDate.ofEpochDay(dt.getLong(ChronoField.EPOCH_DAY)); 4080 LocalTime time = LocalTime.ofNanoOfDay(dt.getLong(ChronoField.NANO_OF_DAY)); 4081 LocalDateTime ldt = date.atTime(time); 4082 if (zone.getRules().getTransition(ldt) == null) { 4083 type = zone.getRules().isDaylightSavings(ldt.atZone(zone).toInstant()) ? DST : STD; 4084 } 4085 } 4086 } 4087 String name = getDisplayName(zname, type, context.getLocale()); 4088 if (name != null) { 4089 zname = name; 4090 } 4091 } 4092 buf.append(zname); 4093 return true; 4094 } 4095 4096 // cache per instance for now 4097 private final Map<Locale, Entry<Integer, SoftReference<PrefixTree>>> 4098 cachedTree = new HashMap<>(); 4099 private final Map<Locale, Entry<Integer, SoftReference<PrefixTree>>> 4100 cachedTreeCI = new HashMap<>(); 4101 4102 @Override 4103 protected PrefixTree getTree(DateTimeParseContext context) { 4104 if (textStyle == TextStyle.NARROW) { 4105 return super.getTree(context); 4106 } 4107 Locale locale = context.getLocale(); 4108 boolean isCaseSensitive = context.isCaseSensitive(); 4109 Set<String> regionIds = ZoneRulesProvider.getAvailableZoneIds(); 4110 int regionIdsSize = regionIds.size(); 4111 4112 Map<Locale, Entry<Integer, SoftReference<PrefixTree>>> cached = 4113 isCaseSensitive ? cachedTree : cachedTreeCI; 4114 4115 Entry<Integer, SoftReference<PrefixTree>> entry = null; 4116 PrefixTree tree = null; 4117 String[][] zoneStrings = null; 4118 if ((entry = cached.get(locale)) == null || 4119 (entry.getKey() != regionIdsSize || 4120 (tree = entry.getValue().get()) == null)) { 4121 tree = PrefixTree.newTree(context); 4122 zoneStrings = TimeZoneNameUtility.getZoneStrings(locale); 4123 for (String[] names : zoneStrings) { 4124 String zid = names[0]; 4125 if (!regionIds.contains(zid)) { 4126 continue; 4127 } 4128 tree.add(zid, zid); // don't convert zid -> metazone 4129 zid = ZoneName.toZid(zid, locale); 4130 int i = textStyle == TextStyle.FULL ? 1 : 2; 4131 for (; i < names.length; i += 2) { 4132 tree.add(names[i], zid); 4133 } 4134 } 4135 // if we have a set of preferred zones, need a copy and 4136 // add the preferred zones again to overwrite 4137 if (preferredZones != null) { 4138 for (String[] names : zoneStrings) { 4139 String zid = names[0]; 4140 if (!preferredZones.contains(zid) || !regionIds.contains(zid)) { 4141 continue; 4142 } 4143 int i = textStyle == TextStyle.FULL ? 1 : 2; 4144 for (; i < names.length; i += 2) { 4145 tree.add(names[i], zid); 4146 } 4147 } 4148 } 4149 cached.put(locale, new SimpleImmutableEntry<>(regionIdsSize, new SoftReference<>(tree))); 4150 } 4151 return tree; 4152 } 4153 } 4154 4155 //----------------------------------------------------------------------- 4156 /** 4157 * Prints or parses a zone ID. 4158 */ 4159 static class ZoneIdPrinterParser implements DateTimePrinterParser { 4160 private final TemporalQuery<ZoneId> query; 4161 private final String description; 4162 4163 ZoneIdPrinterParser(TemporalQuery<ZoneId> query, String description) { 4164 this.query = query; 4165 this.description = description; 4166 } 4167 4168 @Override 4169 public boolean format(DateTimePrintContext context, StringBuilder buf) { 4170 ZoneId zone = context.getValue(query); 4171 if (zone == null) { 4172 return false; 4173 } 4174 buf.append(zone.getId()); 4175 return true; 4176 } 4177 4178 /** 4179 * The cached tree to speed up parsing. 4180 */ 4181 private static volatile Entry<Integer, PrefixTree> cachedPrefixTree; 4182 private static volatile Entry<Integer, PrefixTree> cachedPrefixTreeCI; 4183 4184 protected PrefixTree getTree(DateTimeParseContext context) { 4185 // prepare parse tree 4186 Set<String> regionIds = ZoneRulesProvider.getAvailableZoneIds(); 4187 final int regionIdsSize = regionIds.size(); 4188 Entry<Integer, PrefixTree> cached = context.isCaseSensitive() 4189 ? cachedPrefixTree : cachedPrefixTreeCI; 4190 if (cached == null || cached.getKey() != regionIdsSize) { 4191 synchronized (this) { 4192 cached = context.isCaseSensitive() ? cachedPrefixTree : cachedPrefixTreeCI; 4193 if (cached == null || cached.getKey() != regionIdsSize) { 4194 cached = new SimpleImmutableEntry<>(regionIdsSize, PrefixTree.newTree(regionIds, context)); 4195 if (context.isCaseSensitive()) { 4196 cachedPrefixTree = cached; 4197 } else { 4198 cachedPrefixTreeCI = cached; 4199 } 4200 } 4201 } 4202 } 4203 return cached.getValue(); 4204 } 4205 4206 /** 4207 * This implementation looks for the longest matching string. 4208 * For example, parsing Etc/GMT-2 will return Etc/GMC-2 rather than just 4209 * Etc/GMC although both are valid. 4210 */ 4211 @Override 4212 public int parse(DateTimeParseContext context, CharSequence text, int position) { 4213 int length = text.length(); 4214 if (position > length) { 4215 throw new IndexOutOfBoundsException(); 4216 } 4217 if (position == length) { 4218 return ~position; 4219 } 4220 4221 // handle fixed time-zone IDs 4222 char nextChar = text.charAt(position); 4223 if (nextChar == '+' || nextChar == '-') { 4224 return parseOffsetBased(context, text, position, position, OffsetIdPrinterParser.INSTANCE_ID_Z); 4225 } else if (length >= position + 2) { 4226 char nextNextChar = text.charAt(position + 1); 4227 if (context.charEquals(nextChar, 'U') && context.charEquals(nextNextChar, 'T')) { 4228 if (length >= position + 3 && context.charEquals(text.charAt(position + 2), 'C')) { 4229 return parseOffsetBased(context, text, position, position + 3, OffsetIdPrinterParser.INSTANCE_ID_ZERO); 4230 } 4231 return parseOffsetBased(context, text, position, position + 2, OffsetIdPrinterParser.INSTANCE_ID_ZERO); 4232 } else if (context.charEquals(nextChar, 'G') && length >= position + 3 && 4233 context.charEquals(nextNextChar, 'M') && context.charEquals(text.charAt(position + 2), 'T')) { 4234 if (length >= position + 4 && context.charEquals(text.charAt(position + 3), '0')) { 4235 context.setParsed(ZoneId.of("GMT0")); 4236 return position + 4; 4237 } 4238 return parseOffsetBased(context, text, position, position + 3, OffsetIdPrinterParser.INSTANCE_ID_ZERO); 4239 } 4240 } 4241 4242 // parse 4243 PrefixTree tree = getTree(context); 4244 ParsePosition ppos = new ParsePosition(position); 4245 String parsedZoneId = tree.match(text, ppos); 4246 if (parsedZoneId == null) { 4247 if (context.charEquals(nextChar, 'Z')) { 4248 context.setParsed(ZoneOffset.UTC); 4249 return position + 1; 4250 } 4251 return ~position; 4252 } 4253 context.setParsed(ZoneId.of(parsedZoneId)); 4254 return ppos.getIndex(); 4255 } 4256 4257 /** 4258 * Parse an offset following a prefix and set the ZoneId if it is valid. 4259 * To matching the parsing of ZoneId.of the values are not normalized 4260 * to ZoneOffsets. 4261 * 4262 * @param context the parse context 4263 * @param text the input text 4264 * @param prefixPos start of the prefix 4265 * @param position start of text after the prefix 4266 * @param parser parser for the value after the prefix 4267 * @return the position after the parse 4268 */ 4269 private int parseOffsetBased(DateTimeParseContext context, CharSequence text, int prefixPos, int position, OffsetIdPrinterParser parser) { 4270 String prefix = text.subSequence(prefixPos, position).toString().toUpperCase(); 4271 if (position >= text.length()) { 4272 context.setParsed(ZoneId.of(prefix)); 4273 return position; 4274 } 4275 4276 // '0' or 'Z' after prefix is not part of a valid ZoneId; use bare prefix 4277 if (text.charAt(position) == '0' || 4278 context.charEquals(text.charAt(position), 'Z')) { 4279 context.setParsed(ZoneId.of(prefix)); 4280 return position; 4281 } 4282 4283 DateTimeParseContext newContext = context.copy(); 4284 int endPos = parser.parse(newContext, text, position); 4285 try { 4286 if (endPos < 0) { 4287 if (parser == OffsetIdPrinterParser.INSTANCE_ID_Z) { 4288 return ~prefixPos; 4289 } 4290 context.setParsed(ZoneId.of(prefix)); 4291 return position; 4292 } 4293 int offset = (int) newContext.getParsed(OFFSET_SECONDS).longValue(); 4294 ZoneOffset zoneOffset = ZoneOffset.ofTotalSeconds(offset); 4295 context.setParsed(ZoneId.ofOffset(prefix, zoneOffset)); 4296 return endPos; 4297 } catch (DateTimeException dte) { 4298 return ~prefixPos; 4299 } 4300 } 4301 4302 @Override 4303 public String toString() { 4304 return description; 4305 } 4306 } 4307 4308 //----------------------------------------------------------------------- 4309 /** 4310 * A String based prefix tree for parsing time-zone names. 4311 */ 4312 static class PrefixTree { 4313 protected String key; 4314 protected String value; 4315 protected char c0; // performance optimization to avoid the 4316 // boundary check cost of key.charat(0) 4317 protected PrefixTree child; 4318 protected PrefixTree sibling; 4319 4320 private PrefixTree(String k, String v, PrefixTree child) { 4321 this.key = k; 4322 this.value = v; 4323 this.child = child; 4324 if (k.length() == 0){ 4325 c0 = 0xffff; 4326 } else { 4327 c0 = key.charAt(0); 4328 } 4329 } 4330 4331 /** 4332 * Creates a new prefix parsing tree based on parse context. 4333 * 4334 * @param context the parse context 4335 * @return the tree, not null 4336 */ 4337 public static PrefixTree newTree(DateTimeParseContext context) { 4338 //if (!context.isStrict()) { 4339 // return new LENIENT("", null, null); 4340 //} 4341 if (context.isCaseSensitive()) { 4342 return new PrefixTree("", null, null); 4343 } 4344 return new CI("", null, null); 4345 } 4346 4347 /** 4348 * Creates a new prefix parsing tree. 4349 * 4350 * @param keys a set of strings to build the prefix parsing tree, not null 4351 * @param context the parse context 4352 * @return the tree, not null 4353 */ 4354 public static PrefixTree newTree(Set<String> keys, DateTimeParseContext context) { 4355 PrefixTree tree = newTree(context); 4356 for (String k : keys) { 4357 tree.add0(k, k); 4358 } 4359 return tree; 4360 } 4361 4362 /** 4363 * Clone a copy of this tree 4364 */ 4365 public PrefixTree copyTree() { 4366 PrefixTree copy = new PrefixTree(key, value, null); 4367 if (child != null) { 4368 copy.child = child.copyTree(); 4369 } 4370 if (sibling != null) { 4371 copy.sibling = sibling.copyTree(); 4372 } 4373 return copy; 4374 } 4375 4376 4377 /** 4378 * Adds a pair of {key, value} into the prefix tree. 4379 * 4380 * @param k the key, not null 4381 * @param v the value, not null 4382 * @return true if the pair is added successfully 4383 */ 4384 public boolean add(String k, String v) { 4385 return add0(k, v); 4386 } 4387 4388 private boolean add0(String k, String v) { 4389 k = toKey(k); 4390 int prefixLen = prefixLength(k); 4391 if (prefixLen == key.length()) { 4392 if (prefixLen < k.length()) { // down the tree 4393 String subKey = k.substring(prefixLen); 4394 PrefixTree c = child; 4395 while (c != null) { 4396 if (isEqual(c.c0, subKey.charAt(0))) { 4397 return c.add0(subKey, v); 4398 } 4399 c = c.sibling; 4400 } 4401 // add the node as the child of the current node 4402 c = newNode(subKey, v, null); 4403 c.sibling = child; 4404 child = c; 4405 return true; 4406 } 4407 // have an existing <key, value> already, overwrite it 4408 // if (value != null) { 4409 // return false; 4410 //} 4411 value = v; 4412 return true; 4413 } 4414 // split the existing node 4415 PrefixTree n1 = newNode(key.substring(prefixLen), value, child); 4416 key = k.substring(0, prefixLen); 4417 child = n1; 4418 if (prefixLen < k.length()) { 4419 PrefixTree n2 = newNode(k.substring(prefixLen), v, null); 4420 child.sibling = n2; 4421 value = null; 4422 } else { 4423 value = v; 4424 } 4425 return true; 4426 } 4427 4428 /** 4429 * Match text with the prefix tree. 4430 * 4431 * @param text the input text to parse, not null 4432 * @param off the offset position to start parsing at 4433 * @param end the end position to stop parsing 4434 * @return the resulting string, or null if no match found. 4435 */ 4436 public String match(CharSequence text, int off, int end) { 4437 if (!prefixOf(text, off, end)){ 4438 return null; 4439 } 4440 if (child != null && (off += key.length()) != end) { 4441 PrefixTree c = child; 4442 do { 4443 if (isEqual(c.c0, text.charAt(off))) { 4444 String found = c.match(text, off, end); 4445 if (found != null) { 4446 return found; 4447 } 4448 return value; 4449 } 4450 c = c.sibling; 4451 } while (c != null); 4452 } 4453 return value; 4454 } 4455 4456 /** 4457 * Match text with the prefix tree. 4458 * 4459 * @param text the input text to parse, not null 4460 * @param pos the position to start parsing at, from 0 to the text 4461 * length. Upon return, position will be updated to the new parse 4462 * position, or unchanged, if no match found. 4463 * @return the resulting string, or null if no match found. 4464 */ 4465 public String match(CharSequence text, ParsePosition pos) { 4466 int off = pos.getIndex(); 4467 int end = text.length(); 4468 if (!prefixOf(text, off, end)){ 4469 return null; 4470 } 4471 off += key.length(); 4472 if (child != null && off != end) { 4473 PrefixTree c = child; 4474 do { 4475 if (isEqual(c.c0, text.charAt(off))) { 4476 pos.setIndex(off); 4477 String found = c.match(text, pos); 4478 if (found != null) { 4479 return found; 4480 } 4481 break; 4482 } 4483 c = c.sibling; 4484 } while (c != null); 4485 } 4486 pos.setIndex(off); 4487 return value; 4488 } 4489 4490 protected String toKey(String k) { 4491 return k; 4492 } 4493 4494 protected PrefixTree newNode(String k, String v, PrefixTree child) { 4495 return new PrefixTree(k, v, child); 4496 } 4497 4498 protected boolean isEqual(char c1, char c2) { 4499 return c1 == c2; 4500 } 4501 4502 protected boolean prefixOf(CharSequence text, int off, int end) { 4503 if (text instanceof String) { 4504 return ((String)text).startsWith(key, off); 4505 } 4506 int len = key.length(); 4507 if (len > end - off) { 4508 return false; 4509 } 4510 int off0 = 0; 4511 while (len-- > 0) { 4512 if (!isEqual(key.charAt(off0++), text.charAt(off++))) { 4513 return false; 4514 } 4515 } 4516 return true; 4517 } 4518 4519 private int prefixLength(String k) { 4520 int off = 0; 4521 while (off < k.length() && off < key.length()) { 4522 if (!isEqual(k.charAt(off), key.charAt(off))) { 4523 return off; 4524 } 4525 off++; 4526 } 4527 return off; 4528 } 4529 4530 /** 4531 * Case Insensitive prefix tree. 4532 */ 4533 private static class CI extends PrefixTree { 4534 4535 private CI(String k, String v, PrefixTree child) { 4536 super(k, v, child); 4537 } 4538 4539 @Override 4540 protected CI newNode(String k, String v, PrefixTree child) { 4541 return new CI(k, v, child); 4542 } 4543 4544 @Override 4545 protected boolean isEqual(char c1, char c2) { 4546 return DateTimeParseContext.charEqualsIgnoreCase(c1, c2); 4547 } 4548 4549 @Override 4550 protected boolean prefixOf(CharSequence text, int off, int end) { 4551 int len = key.length(); 4552 if (len > end - off) { 4553 return false; 4554 } 4555 int off0 = 0; 4556 while (len-- > 0) { 4557 if (!isEqual(key.charAt(off0++), text.charAt(off++))) { 4558 return false; 4559 } 4560 } 4561 return true; 4562 } 4563 } 4564 4565 /** 4566 * Lenient prefix tree. Case insensitive and ignores characters 4567 * like space, underscore and slash. 4568 */ 4569 private static class LENIENT extends CI { 4570 4571 private LENIENT(String k, String v, PrefixTree child) { 4572 super(k, v, child); 4573 } 4574 4575 @Override 4576 protected CI newNode(String k, String v, PrefixTree child) { 4577 return new LENIENT(k, v, child); 4578 } 4579 4580 private boolean isLenientChar(char c) { 4581 return c == ' ' || c == '_' || c == '/'; 4582 } 4583 4584 protected String toKey(String k) { 4585 for (int i = 0; i < k.length(); i++) { 4586 if (isLenientChar(k.charAt(i))) { 4587 StringBuilder sb = new StringBuilder(k.length()); 4588 sb.append(k, 0, i); 4589 i++; 4590 while (i < k.length()) { 4591 if (!isLenientChar(k.charAt(i))) { 4592 sb.append(k.charAt(i)); 4593 } 4594 i++; 4595 } 4596 return sb.toString(); 4597 } 4598 } 4599 return k; 4600 } 4601 4602 @Override 4603 public String match(CharSequence text, ParsePosition pos) { 4604 int off = pos.getIndex(); 4605 int end = text.length(); 4606 int len = key.length(); 4607 int koff = 0; 4608 while (koff < len && off < end) { 4609 if (isLenientChar(text.charAt(off))) { 4610 off++; 4611 continue; 4612 } 4613 if (!isEqual(key.charAt(koff++), text.charAt(off++))) { 4614 return null; 4615 } 4616 } 4617 if (koff != len) { 4618 return null; 4619 } 4620 if (child != null && off != end) { 4621 int off0 = off; 4622 while (off0 < end && isLenientChar(text.charAt(off0))) { 4623 off0++; 4624 } 4625 if (off0 < end) { 4626 PrefixTree c = child; 4627 do { 4628 if (isEqual(c.c0, text.charAt(off0))) { 4629 pos.setIndex(off0); 4630 String found = c.match(text, pos); 4631 if (found != null) { 4632 return found; 4633 } 4634 break; 4635 } 4636 c = c.sibling; 4637 } while (c != null); 4638 } 4639 } 4640 pos.setIndex(off); 4641 return value; 4642 } 4643 } 4644 } 4645 4646 //----------------------------------------------------------------------- 4647 /** 4648 * Prints or parses a chronology. 4649 */ 4650 static final class ChronoPrinterParser implements DateTimePrinterParser { 4651 /** The text style to output, null means the ID. */ 4652 private final TextStyle textStyle; 4653 4654 ChronoPrinterParser(TextStyle textStyle) { 4655 // validated by caller 4656 this.textStyle = textStyle; 4657 } 4658 4659 @Override 4660 public boolean format(DateTimePrintContext context, StringBuilder buf) { 4661 Chronology chrono = context.getValue(TemporalQueries.chronology()); 4662 if (chrono == null) { 4663 return false; 4664 } 4665 if (textStyle == null) { 4666 buf.append(chrono.getId()); 4667 } else { 4668 buf.append(getChronologyName(chrono, context.getLocale())); 4669 } 4670 return true; 4671 } 4672 4673 @Override 4674 public int parse(DateTimeParseContext context, CharSequence text, int position) { 4675 // simple looping parser to find the chronology 4676 if (position < 0 || position > text.length()) { 4677 throw new IndexOutOfBoundsException(); 4678 } 4679 Set<Chronology> chronos = Chronology.getAvailableChronologies(); 4680 Chronology bestMatch = null; 4681 int matchLen = -1; 4682 for (Chronology chrono : chronos) { 4683 String name; 4684 if (textStyle == null) { 4685 name = chrono.getId(); 4686 } else { 4687 name = getChronologyName(chrono, context.getLocale()); 4688 } 4689 int nameLen = name.length(); 4690 if (nameLen > matchLen && context.subSequenceEquals(text, position, name, 0, nameLen)) { 4691 bestMatch = chrono; 4692 matchLen = nameLen; 4693 } 4694 } 4695 if (bestMatch == null) { 4696 return ~position; 4697 } 4698 context.setParsed(bestMatch); 4699 return position + matchLen; 4700 } 4701 4702 /** 4703 * Returns the chronology name of the given chrono in the given locale 4704 * if available, or the chronology Id otherwise. The regular ResourceBundle 4705 * search path is used for looking up the chronology name. 4706 * 4707 * @param chrono the chronology, not null 4708 * @param locale the locale, not null 4709 * @return the chronology name of chrono in locale, or the id if no name is available 4710 * @throws NullPointerException if chrono or locale is null 4711 */ 4712 private String getChronologyName(Chronology chrono, Locale locale) { 4713 String key = "calendarname." + chrono.getCalendarType(); 4714 String name = DateTimeTextProvider.getLocalizedResource(key, locale); 4715 return Objects.requireNonNullElseGet(name, () -> chrono.getId()); 4716 } 4717 } 4718 4719 //----------------------------------------------------------------------- 4720 /** 4721 * Prints or parses a localized pattern. 4722 */ 4723 static final class LocalizedPrinterParser implements DateTimePrinterParser { 4724 /** Cache of formatters. */ 4725 private static final ConcurrentMap<String, DateTimeFormatter> FORMATTER_CACHE = new ConcurrentHashMap<>(16, 0.75f, 2); 4726 4727 private final FormatStyle dateStyle; 4728 private final FormatStyle timeStyle; 4729 4730 /** 4731 * Constructor. 4732 * 4733 * @param dateStyle the date style to use, may be null 4734 * @param timeStyle the time style to use, may be null 4735 */ 4736 LocalizedPrinterParser(FormatStyle dateStyle, FormatStyle timeStyle) { 4737 // validated by caller 4738 this.dateStyle = dateStyle; 4739 this.timeStyle = timeStyle; 4740 } 4741 4742 @Override 4743 public boolean format(DateTimePrintContext context, StringBuilder buf) { 4744 Chronology chrono = Chronology.from(context.getTemporal()); 4745 return formatter(context.getLocale(), chrono).toPrinterParser(false).format(context, buf); 4746 } 4747 4748 @Override 4749 public int parse(DateTimeParseContext context, CharSequence text, int position) { 4750 Chronology chrono = context.getEffectiveChronology(); 4751 return formatter(context.getLocale(), chrono).toPrinterParser(false).parse(context, text, position); 4752 } 4753 4754 /** 4755 * Gets the formatter to use. 4756 * <p> 4757 * The formatter will be the most appropriate to use for the date and time style in the locale. 4758 * For example, some locales will use the month name while others will use the number. 4759 * 4760 * @param locale the locale to use, not null 4761 * @param chrono the chronology to use, not null 4762 * @return the formatter, not null 4763 * @throws IllegalArgumentException if the formatter cannot be found 4764 */ 4765 private DateTimeFormatter formatter(Locale locale, Chronology chrono) { 4766 String key = chrono.getId() + '|' + locale.toString() + '|' + dateStyle + timeStyle; 4767 DateTimeFormatter formatter = FORMATTER_CACHE.get(key); 4768 if (formatter == null) { 4769 String pattern = getLocalizedDateTimePattern(dateStyle, timeStyle, chrono, locale); 4770 formatter = new DateTimeFormatterBuilder().appendPattern(pattern).toFormatter(locale); 4771 DateTimeFormatter old = FORMATTER_CACHE.putIfAbsent(key, formatter); 4772 if (old != null) { 4773 formatter = old; 4774 } 4775 } 4776 return formatter; 4777 } 4778 4779 @Override 4780 public String toString() { 4781 return "Localized(" + (dateStyle != null ? dateStyle : "") + "," + 4782 (timeStyle != null ? timeStyle : "") + ")"; 4783 } 4784 } 4785 4786 //----------------------------------------------------------------------- 4787 /** 4788 * Prints or parses a localized pattern from a localized field. 4789 * The specific formatter and parameters is not selected until 4790 * the field is to be printed or parsed. 4791 * The locale is needed to select the proper WeekFields from which 4792 * the field for day-of-week, week-of-month, or week-of-year is selected. 4793 * Hence the inherited field NumberPrinterParser.field is unused. 4794 */ 4795 static final class WeekBasedFieldPrinterParser extends NumberPrinterParser { 4796 private char chr; 4797 private int count; 4798 4799 /** 4800 * Constructor. 4801 * 4802 * @param chr the pattern format letter that added this PrinterParser. 4803 * @param count the repeat count of the format letter 4804 * @param minWidth the minimum field width, from 1 to 19 4805 * @param maxWidth the maximum field width, from minWidth to 19 4806 */ 4807 WeekBasedFieldPrinterParser(char chr, int count, int minWidth, int maxWidth) { 4808 this(chr, count, minWidth, maxWidth, 0); 4809 } 4810 4811 /** 4812 * Constructor. 4813 * 4814 * @param chr the pattern format letter that added this PrinterParser. 4815 * @param count the repeat count of the format letter 4816 * @param minWidth the minimum field width, from 1 to 19 4817 * @param maxWidth the maximum field width, from minWidth to 19 4818 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater, 4819 * -1 if fixed width due to active adjacent parsing 4820 */ 4821 WeekBasedFieldPrinterParser(char chr, int count, int minWidth, int maxWidth, 4822 int subsequentWidth) { 4823 super(null, minWidth, maxWidth, SignStyle.NOT_NEGATIVE, subsequentWidth); 4824 this.chr = chr; 4825 this.count = count; 4826 } 4827 4828 /** 4829 * Returns a new instance with fixed width flag set. 4830 * 4831 * @return a new updated printer-parser, not null 4832 */ 4833 @Override 4834 WeekBasedFieldPrinterParser withFixedWidth() { 4835 if (subsequentWidth == -1) { 4836 return this; 4837 } 4838 return new WeekBasedFieldPrinterParser(chr, count, minWidth, maxWidth, -1); 4839 } 4840 4841 /** 4842 * Returns a new instance with an updated subsequent width. 4843 * 4844 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater 4845 * @return a new updated printer-parser, not null 4846 */ 4847 @Override 4848 WeekBasedFieldPrinterParser withSubsequentWidth(int subsequentWidth) { 4849 return new WeekBasedFieldPrinterParser(chr, count, minWidth, maxWidth, 4850 this.subsequentWidth + subsequentWidth); 4851 } 4852 4853 @Override 4854 public boolean format(DateTimePrintContext context, StringBuilder buf) { 4855 return printerParser(context.getLocale()).format(context, buf); 4856 } 4857 4858 @Override 4859 public int parse(DateTimeParseContext context, CharSequence text, int position) { 4860 return printerParser(context.getLocale()).parse(context, text, position); 4861 } 4862 4863 /** 4864 * Gets the printerParser to use based on the field and the locale. 4865 * 4866 * @param locale the locale to use, not null 4867 * @return the formatter, not null 4868 * @throws IllegalArgumentException if the formatter cannot be found 4869 */ 4870 private DateTimePrinterParser printerParser(Locale locale) { 4871 WeekFields weekDef = WeekFields.of(locale); 4872 TemporalField field = null; 4873 switch (chr) { 4874 case 'Y': 4875 field = weekDef.weekBasedYear(); 4876 if (count == 2) { 4877 return new ReducedPrinterParser(field, 2, 2, 0, ReducedPrinterParser.BASE_DATE, 4878 this.subsequentWidth); 4879 } else { 4880 return new NumberPrinterParser(field, count, 19, 4881 (count < 4) ? SignStyle.NORMAL : SignStyle.EXCEEDS_PAD, 4882 this.subsequentWidth); 4883 } 4884 case 'e': 4885 case 'c': 4886 field = weekDef.dayOfWeek(); 4887 break; 4888 case 'w': 4889 field = weekDef.weekOfWeekBasedYear(); 4890 break; 4891 case 'W': 4892 field = weekDef.weekOfMonth(); 4893 break; 4894 default: 4895 throw new IllegalStateException("unreachable"); 4896 } 4897 return new NumberPrinterParser(field, minWidth, maxWidth, SignStyle.NOT_NEGATIVE, 4898 this.subsequentWidth); 4899 } 4900 4901 @Override 4902 public String toString() { 4903 StringBuilder sb = new StringBuilder(30); 4904 sb.append("Localized("); 4905 if (chr == 'Y') { 4906 if (count == 1) { 4907 sb.append("WeekBasedYear"); 4908 } else if (count == 2) { 4909 sb.append("ReducedValue(WeekBasedYear,2,2,2000-01-01)"); 4910 } else { 4911 sb.append("WeekBasedYear,").append(count).append(",") 4912 .append(19).append(",") 4913 .append((count < 4) ? SignStyle.NORMAL : SignStyle.EXCEEDS_PAD); 4914 } 4915 } else { 4916 switch (chr) { 4917 case 'c': 4918 case 'e': 4919 sb.append("DayOfWeek"); 4920 break; 4921 case 'w': 4922 sb.append("WeekOfWeekBasedYear"); 4923 break; 4924 case 'W': 4925 sb.append("WeekOfMonth"); 4926 break; 4927 default: 4928 break; 4929 } 4930 sb.append(","); 4931 sb.append(count); 4932 } 4933 sb.append(")"); 4934 return sb.toString(); 4935 } 4936 } 4937 4938 //------------------------------------------------------------------------- 4939 /** 4940 * Length comparator. 4941 */ 4942 static final Comparator<String> LENGTH_SORT = new Comparator<String>() { 4943 @Override 4944 public int compare(String str1, String str2) { 4945 return str1.length() == str2.length() ? str1.compareTo(str2) : str1.length() - str2.length(); 4946 } 4947 }; 4948 }