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