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