1 /* 2 * Copyright (c) 1996, 2021, 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 * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved 28 * (C) Copyright IBM Corp. 1996-1998 - All Rights Reserved 29 * 30 * The original version of this source code and documentation is copyrighted 31 * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These 32 * materials are provided under terms of a License Agreement between Taligent 33 * and Sun. This technology is protected by multiple US and International 34 * patents. This notice and attribution to Taligent may not be removed. 35 * Taligent is a registered trademark of Taligent, Inc. 36 * 37 */ 38 39 package java.text; 40 41 import java.io.IOException; 42 import java.io.InvalidObjectException; 43 import java.io.ObjectInputStream; 44 import static java.text.DateFormatSymbols.*; 45 import java.util.Calendar; 46 import java.util.Date; 47 import java.util.GregorianCalendar; 48 import java.util.Locale; 49 import java.util.Map; 50 import java.util.SimpleTimeZone; 51 import java.util.SortedMap; 52 import java.util.TimeZone; 53 import java.util.concurrent.ConcurrentHashMap; 54 import java.util.concurrent.ConcurrentMap; 55 import sun.util.calendar.CalendarUtils; 56 import sun.util.calendar.ZoneInfoFile; 57 import sun.util.locale.provider.LocaleProviderAdapter; 58 import sun.util.locale.provider.TimeZoneNameUtility; 59 60 /** 61 * {@code SimpleDateFormat} is a concrete class for formatting and 62 * parsing dates in a locale-sensitive manner. It allows for formatting 63 * (date → text), parsing (text → date), and normalization. 64 * 65 * <p> 66 * {@code SimpleDateFormat} allows you to start by choosing 67 * any user-defined patterns for date-time formatting. However, you 68 * are encouraged to create a date-time formatter with either 69 * {@code getTimeInstance}, {@code getDateInstance}, or 70 * {@code getDateTimeInstance} in {@code DateFormat}. Each 71 * of these class methods can return a date/time formatter initialized 72 * with a default format pattern. You may modify the format pattern 73 * using the {@code applyPattern} methods as desired. 74 * For more information on using these methods, see 75 * {@link DateFormat}. 76 * 77 * <h2>Date and Time Patterns</h2> 78 * <p> 79 * Date and time formats are specified by <em>date and time pattern</em> 80 * strings. 81 * Within date and time pattern strings, unquoted letters from 82 * {@code 'A'} to {@code 'Z'} and from {@code 'a'} to 83 * {@code 'z'} are interpreted as pattern letters representing the 84 * components of a date or time string. 85 * Text can be quoted using single quotes ({@code '}) to avoid 86 * interpretation. 87 * {@code "''"} represents a single quote. 88 * All other characters are not interpreted; they're simply copied into the 89 * output string during formatting or matched against the input string 90 * during parsing. 91 * <p> 92 * The following pattern letters are defined (all other characters from 93 * {@code 'A'} to {@code 'Z'} and from {@code 'a'} to 94 * {@code 'z'} are reserved): 95 * <blockquote> 96 * <table class="striped"> 97 * <caption style="display:none">Chart shows pattern letters, date/time component, presentation, and examples.</caption> 98 * <thead> 99 * <tr> 100 * <th scope="col" style="text-align:left">Letter 101 * <th scope="col" style="text-align:left">Date or Time Component 102 * <th scope="col" style="text-align:left">Presentation 103 * <th scope="col" style="text-align:left">Examples 104 * </thead> 105 * <tbody> 106 * <tr> 107 * <th scope="row">{@code G} 108 * <td>Era designator 109 * <td><a href="#text">Text</a> 110 * <td>{@code AD} 111 * <tr> 112 * <th scope="row">{@code y} 113 * <td>Year 114 * <td><a href="#year">Year</a> 115 * <td>{@code 1996}; {@code 96} 116 * <tr> 117 * <th scope="row">{@code Y} 118 * <td>Week year 119 * <td><a href="#year">Year</a> 120 * <td>{@code 2009}; {@code 09} 121 * <tr> 122 * <th scope="row">{@code M} 123 * <td>Month in year (context sensitive) 124 * <td><a href="#month">Month</a> 125 * <td>{@code July}; {@code Jul}; {@code 07} 126 * <tr> 127 * <th scope="row">{@code L} 128 * <td>Month in year (standalone form) 129 * <td><a href="#month">Month</a> 130 * <td>{@code July}; {@code Jul}; {@code 07} 131 * <tr> 132 * <th scope="row">{@code w} 133 * <td>Week in year 134 * <td><a href="#number">Number</a> 135 * <td>{@code 27} 136 * <tr> 137 * <th scope="row">{@code W} 138 * <td>Week in month 139 * <td><a href="#number">Number</a> 140 * <td>{@code 2} 141 * <tr> 142 * <th scope="row">{@code D} 143 * <td>Day in year 144 * <td><a href="#number">Number</a> 145 * <td>{@code 189} 146 * <tr> 147 * <th scope="row">{@code d} 148 * <td>Day in month 149 * <td><a href="#number">Number</a> 150 * <td>{@code 10} 151 * <tr> 152 * <th scope="row">{@code F} 153 * <td>Day of week in month 154 * <td><a href="#number">Number</a> 155 * <td>{@code 2} 156 * <tr> 157 * <th scope="row">{@code E} 158 * <td>Day name in week 159 * <td><a href="#text">Text</a> 160 * <td>{@code Tuesday}; {@code Tue} 161 * <tr> 162 * <th scope="row">{@code u} 163 * <td>Day number of week (1 = Monday, ..., 7 = Sunday) 164 * <td><a href="#number">Number</a> 165 * <td>{@code 1} 166 * <tr> 167 * <th scope="row">{@code a} 168 * <td>Am/pm marker 169 * <td><a href="#text">Text</a> 170 * <td>{@code PM} 171 * <tr> 172 * <th scope="row">{@code H} 173 * <td>Hour in day (0-23) 174 * <td><a href="#number">Number</a> 175 * <td>{@code 0} 176 * <tr> 177 * <th scope="row">{@code k} 178 * <td>Hour in day (1-24) 179 * <td><a href="#number">Number</a> 180 * <td>{@code 24} 181 * <tr> 182 * <th scope="row">{@code K} 183 * <td>Hour in am/pm (0-11) 184 * <td><a href="#number">Number</a> 185 * <td>{@code 0} 186 * <tr> 187 * <th scope="row">{@code h} 188 * <td>Hour in am/pm (1-12) 189 * <td><a href="#number">Number</a> 190 * <td>{@code 12} 191 * <tr> 192 * <th scope="row">{@code m} 193 * <td>Minute in hour 194 * <td><a href="#number">Number</a> 195 * <td>{@code 30} 196 * <tr> 197 * <th scope="row">{@code s} 198 * <td>Second in minute 199 * <td><a href="#number">Number</a> 200 * <td>{@code 55} 201 * <tr> 202 * <th scope="row">{@code S} 203 * <td>Millisecond 204 * <td><a href="#number">Number</a> 205 * <td>{@code 978} 206 * <tr> 207 * <th scope="row">{@code z} 208 * <td>Time zone 209 * <td><a href="#timezone">General time zone</a> 210 * <td>{@code Pacific Standard Time}; {@code PST}; {@code GMT-08:00} 211 * <tr> 212 * <th scope="row">{@code Z} 213 * <td>Time zone 214 * <td><a href="#rfc822timezone">RFC 822 time zone</a> 215 * <td>{@code -0800} 216 * <tr> 217 * <th scope="row">{@code X} 218 * <td>Time zone 219 * <td><a href="#iso8601timezone">ISO 8601 time zone</a> 220 * <td>{@code -08}; {@code -0800}; {@code -08:00} 221 * </tbody> 222 * </table> 223 * </blockquote> 224 * Pattern letters are usually repeated, as their number determines the 225 * exact presentation: 226 * <ul> 227 * <li><strong><a id="text">Text:</a></strong> 228 * For formatting, if the number of pattern letters is 4 or more, 229 * the full form is used; otherwise a short or abbreviated form 230 * is used if available. 231 * For parsing, both forms are accepted, independent of the number 232 * of pattern letters.<br><br></li> 233 * <li><strong><a id="number">Number:</a></strong> 234 * For formatting, the number of pattern letters is the minimum 235 * number of digits, and shorter numbers are zero-padded to this amount. 236 * For parsing, the number of pattern letters is ignored unless 237 * it's needed to separate two adjacent fields.<br><br></li> 238 * <li><strong><a id="year">Year:</a></strong> 239 * If the formatter's {@link #getCalendar() Calendar} is the Gregorian 240 * calendar, the following rules are applied.<br> 241 * <ul> 242 * <li>For formatting, if the number of pattern letters is 2, the year 243 * is truncated to 2 digits; otherwise it is interpreted as a 244 * <a href="#number">number</a>. 245 * <li>For parsing, if the number of pattern letters is more than 2, 246 * the year is interpreted literally, regardless of the number of 247 * digits. So using the pattern "MM/dd/yyyy", "01/11/12" parses to 248 * Jan 11, 12 A.D. 249 * <li>For parsing with the abbreviated year pattern ("y" or "yy"), 250 * {@code SimpleDateFormat} must interpret the abbreviated year 251 * relative to some century. It does this by adjusting dates to be 252 * within 80 years before and 20 years after the time the {@code SimpleDateFormat} 253 * instance is created. For example, using a pattern of "MM/dd/yy" and a 254 * {@code SimpleDateFormat} instance created on Jan 1, 1997, the string 255 * "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64" 256 * would be interpreted as May 4, 1964. 257 * During parsing, only strings consisting of exactly two digits, as defined by 258 * {@link Character#isDigit(char)}, will be parsed into the default century. 259 * Any other numeric string, such as a one digit string, a three or more digit 260 * string, or a two digit string that isn't all digits (for example, "-1"), is 261 * interpreted literally. So "01/02/3" or "01/02/003" are parsed, using the 262 * same pattern, as Jan 2, 3 AD. Likewise, "01/02/-3" is parsed as Jan 2, 4 BC. 263 * </ul> 264 * Otherwise, calendar system specific forms are applied. 265 * For both formatting and parsing, if the number of pattern 266 * letters is 4 or more, a calendar specific {@linkplain 267 * Calendar#LONG long form} is used. Otherwise, a calendar 268 * specific {@linkplain Calendar#SHORT short or abbreviated form} 269 * is used.<br> 270 * <br> 271 * If week year {@code 'Y'} is specified and the {@linkplain 272 * #getCalendar() calendar} doesn't support any <a 273 * href="../util/GregorianCalendar.html#week_year"> week 274 * years</a>, the calendar year ({@code 'y'}) is used instead. The 275 * support of week years can be tested with a call to {@link 276 * DateFormat#getCalendar() getCalendar()}.{@link 277 * java.util.Calendar#isWeekDateSupported() 278 * isWeekDateSupported()}.<br><br></li> 279 * <li><strong><a id="month">Month:</a></strong> 280 * If the number of pattern letters is 3 or more, the month is 281 * interpreted as <a href="#text">text</a>; otherwise, 282 * it is interpreted as a <a href="#number">number</a>.<br> 283 * <ul> 284 * <li>Letter <em>M</em> produces context-sensitive month names, such as the 285 * embedded form of names. Letter <em>M</em> is context-sensitive in the 286 * sense that when it is used in the standalone pattern, for example, 287 * "MMMM", it gives the standalone form of a month name and when it is 288 * used in the pattern containing other field(s), for example, "d MMMM", 289 * it gives the format form of a month name. For example, January in the 290 * Catalan language is "de gener" in the format form while it is "gener" 291 * in the standalone form. In this case, "MMMM" will produce "gener" and 292 * the month part of the "d MMMM" will produce "de gener". If a 293 * {@code DateFormatSymbols} has been set explicitly with constructor 294 * {@link #SimpleDateFormat(String,DateFormatSymbols)} or method {@link 295 * #setDateFormatSymbols(DateFormatSymbols)}, the month names given by 296 * the {@code DateFormatSymbols} are used.</li> 297 * <li>Letter <em>L</em> produces the standalone form of month names.</li> 298 * </ul> 299 * <br></li> 300 * <li><strong><a id="timezone">General time zone:</a></strong> 301 * Time zones are interpreted as <a href="#text">text</a> if they have 302 * names. For time zones representing a GMT offset value, the 303 * following syntax is used: 304 * <pre> 305 * <a id="GMTOffsetTimeZone"><i>GMTOffsetTimeZone:</i></a> 306 * {@code GMT} <i>Sign</i> <i>Hours</i> {@code :} <i>Minutes</i> 307 * <i>Sign:</i> one of 308 * {@code + -} 309 * <i>Hours:</i> 310 * <i>Digit</i> 311 * <i>Digit</i> <i>Digit</i> 312 * <i>Minutes:</i> 313 * <i>Digit</i> <i>Digit</i> 314 * <i>Digit:</i> one of 315 * {@code 0 1 2 3 4 5 6 7 8 9}</pre> 316 * <i>Hours</i> must be between 0 and 23, and <i>Minutes</i> must be between 317 * 00 and 59. The format is locale independent and digits must be taken 318 * from the Basic Latin block of the Unicode standard. 319 * <p>For parsing, <a href="#rfc822timezone">RFC 822 time zones</a> are also 320 * accepted.<br><br></li> 321 * <li><strong><a id="rfc822timezone">RFC 822 time zone:</a></strong> 322 * For formatting, the RFC 822 4-digit time zone format is used: 323 * 324 * <pre> 325 * <i>RFC822TimeZone:</i> 326 * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i> 327 * <i>TwoDigitHours:</i> 328 * <i>Digit Digit</i></pre> 329 * <i>TwoDigitHours</i> must be between 00 and 23. Other definitions 330 * are as for <a href="#timezone">general time zones</a>. 331 * 332 * <p>For parsing, <a href="#timezone">general time zones</a> are also 333 * accepted. 334 * <li><strong><a id="iso8601timezone">ISO 8601 Time zone:</a></strong> 335 * The number of pattern letters designates the format for both formatting 336 * and parsing as follows: 337 * <pre> 338 * <i>ISO8601TimeZone:</i> 339 * <i>OneLetterISO8601TimeZone</i> 340 * <i>TwoLetterISO8601TimeZone</i> 341 * <i>ThreeLetterISO8601TimeZone</i> 342 * <i>OneLetterISO8601TimeZone:</i> 343 * <i>Sign</i> <i>TwoDigitHours</i> 344 * {@code Z} 345 * <i>TwoLetterISO8601TimeZone:</i> 346 * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i> 347 * {@code Z} 348 * <i>ThreeLetterISO8601TimeZone:</i> 349 * <i>Sign</i> <i>TwoDigitHours</i> {@code :} <i>Minutes</i> 350 * {@code Z}</pre> 351 * Other definitions are as for <a href="#timezone">general time zones</a> or 352 * <a href="#rfc822timezone">RFC 822 time zones</a>. 353 * 354 * <p>For formatting, if the offset value from GMT is 0, {@code "Z"} is 355 * produced. If the number of pattern letters is 1, any fraction of an hour 356 * is ignored. For example, if the pattern is {@code "X"} and the time zone is 357 * {@code "GMT+05:30"}, {@code "+05"} is produced. 358 * 359 * <p>For parsing, {@code "Z"} is parsed as the UTC time zone designator. 360 * <a href="#timezone">General time zones</a> are <em>not</em> accepted. 361 * 362 * <p>If the number of pattern letters is 4 or more, {@link 363 * IllegalArgumentException} is thrown when constructing a {@code 364 * SimpleDateFormat} or {@linkplain #applyPattern(String) applying a 365 * pattern}. 366 * </ul> 367 * {@code SimpleDateFormat} also supports <em>localized date and time 368 * pattern</em> strings. In these strings, the pattern letters described above 369 * may be replaced with other, locale dependent, pattern letters. 370 * {@code SimpleDateFormat} does not deal with the localization of text 371 * other than the pattern letters; that's up to the client of the class. 372 * 373 * <h3>Examples</h3> 374 * 375 * The following examples show how date and time patterns are interpreted in 376 * the U.S. locale. The given date and time are 2001-07-04 12:08:56 local time 377 * in the U.S. Pacific Time time zone. 378 * <blockquote> 379 * <table class="striped"> 380 * <caption style="display:none">Examples of date and time patterns interpreted in the U.S. locale</caption> 381 * <thead> 382 * <tr> 383 * <th scope="col" style="text-align:left">Date and Time Pattern 384 * <th scope="col" style="text-align:left">Result 385 * </thead> 386 * <tbody> 387 * <tr> 388 * <th scope="row">{@code "yyyy.MM.dd G 'at' HH:mm:ss z"} 389 * <td>{@code 2001.07.04 AD at 12:08:56 PDT} 390 * <tr> 391 * <th scope="row">{@code "EEE, MMM d, ''yy"} 392 * <td>{@code Wed, Jul 4, '01} 393 * <tr> 394 * <th scope="row">{@code "h:mm a"} 395 * <td>{@code 12:08 PM} 396 * <tr> 397 * <th scope="row">{@code "hh 'o''clock' a, zzzz"} 398 * <td>{@code 12 o'clock PM, Pacific Daylight Time} 399 * <tr> 400 * <th scope="row">{@code "K:mm a, z"} 401 * <td>{@code 0:08 PM, PDT} 402 * <tr> 403 * <th scope="row">{@code "yyyyy.MMMMM.dd GGG hh:mm aaa"} 404 * <td>{@code 02001.July.04 AD 12:08 PM} 405 * <tr> 406 * <th scope="row">{@code "EEE, d MMM yyyy HH:mm:ss Z"} 407 * <td>{@code Wed, 4 Jul 2001 12:08:56 -0700} 408 * <tr> 409 * <th scope="row">{@code "yyMMddHHmmssZ"} 410 * <td>{@code 010704120856-0700} 411 * <tr> 412 * <th scope="row">{@code "yyyy-MM-dd'T'HH:mm:ss.SSSZ"} 413 * <td>{@code 2001-07-04T12:08:56.235-0700} 414 * <tr> 415 * <th scope="row">{@code "yyyy-MM-dd'T'HH:mm:ss.SSSXXX"} 416 * <td>{@code 2001-07-04T12:08:56.235-07:00} 417 * <tr> 418 * <th scope="row">{@code "YYYY-'W'ww-u"} 419 * <td>{@code 2001-W27-3} 420 * </tbody> 421 * </table> 422 * </blockquote> 423 * 424 * <h3><a id="synchronization">Synchronization</a></h3> 425 * 426 * <p> 427 * Date formats are not synchronized. 428 * It is recommended to create separate format instances for each thread. 429 * If multiple threads access a format concurrently, it must be synchronized 430 * externally. 431 * @apiNote Consider using {@link java.time.format.DateTimeFormatter} as an 432 * immutable and thread-safe alternative. 433 * 434 * @see <a href="http://docs.oracle.com/javase/tutorial/i18n/format/simpleDateFormat.html">Java Tutorial</a> 435 * @see java.util.Calendar 436 * @see java.util.TimeZone 437 * @see DateFormat 438 * @see DateFormatSymbols 439 * @see java.time.format.DateTimeFormatter 440 * @author Mark Davis, Chen-Lieh Huang, Alan Liu 441 * @since 1.1 442 */ 443 public class SimpleDateFormat extends DateFormat { 444 445 // the official serial version ID which says cryptically 446 // which version we're compatible with 447 @java.io.Serial 448 static final long serialVersionUID = 4774881970558875024L; 449 450 // the internal serial version which says which version was written 451 // - 0 (default) for version up to JDK 1.1.3 452 // - 1 for version from JDK 1.1.4, which includes a new field 453 static final int currentSerialVersion = 1; 454 455 /** 456 * The version of the serialized data on the stream. Possible values: 457 * <ul> 458 * <li><b>0</b> or not present on stream: JDK 1.1.3. This version 459 * has no {@code defaultCenturyStart} on stream. 460 * <li><b>1</b> JDK 1.1.4 or later. This version adds 461 * {@code defaultCenturyStart}. 462 * </ul> 463 * When streaming out this class, the most recent format 464 * and the highest allowable {@code serialVersionOnStream} 465 * is written. 466 * @serial 467 * @since 1.1.4 468 */ 469 private int serialVersionOnStream = currentSerialVersion; 470 471 /** 472 * The pattern string of this formatter. This is always a non-localized 473 * pattern. May not be null. See class documentation for details. 474 * @serial 475 */ 476 private String pattern; 477 478 /** 479 * Saved numberFormat and pattern. 480 * @see SimpleDateFormat#checkNegativeNumberExpression 481 */ 482 private transient NumberFormat originalNumberFormat; 483 private transient String originalNumberPattern; 484 485 /** 486 * The minus sign to be used with format and parse. 487 */ 488 private transient char minusSign = '-'; 489 490 /** 491 * True when a negative sign follows a number. 492 * (True as default in Arabic.) 493 */ 494 private transient boolean hasFollowingMinusSign = false; 495 496 /** 497 * True if standalone form needs to be used. 498 */ 499 private transient boolean forceStandaloneForm = false; 500 501 /** 502 * The compiled pattern. 503 */ 504 private transient char[] compiledPattern; 505 506 /** 507 * Tags for the compiled pattern. 508 */ 509 private static final int TAG_QUOTE_ASCII_CHAR = 100; 510 private static final int TAG_QUOTE_CHARS = 101; 511 512 /** 513 * Locale dependent digit zero. 514 * @see #zeroPaddingNumber 515 * @see java.text.DecimalFormatSymbols#getZeroDigit 516 */ 517 private transient char zeroDigit; 518 519 /** 520 * The symbols used by this formatter for week names, month names, 521 * etc. May not be null. 522 * @serial 523 * @see java.text.DateFormatSymbols 524 */ 525 private DateFormatSymbols formatData; 526 527 /** 528 * We map dates with two-digit years into the century starting at 529 * {@code defaultCenturyStart}, which may be any date. May 530 * not be null. 531 * @serial 532 * @since 1.1.4 533 */ 534 private Date defaultCenturyStart; 535 536 private transient int defaultCenturyStartYear; 537 538 private static final int MILLIS_PER_MINUTE = 60 * 1000; 539 540 // For time zones that have no names, use strings GMT+minutes and 541 // GMT-minutes. For instance, in France the time zone is GMT+60. 542 private static final String GMT = "GMT"; 543 544 /** 545 * Cache NumberFormat instances with Locale key. 546 */ 547 private static final ConcurrentMap<Locale, NumberFormat> cachedNumberFormatData 548 = new ConcurrentHashMap<>(3); 549 550 /** 551 * The Locale used to instantiate this 552 * {@code SimpleDateFormat}. The value may be null if this object 553 * has been created by an older {@code SimpleDateFormat} and 554 * deserialized. 555 * 556 * @serial 557 * @since 1.6 558 */ 559 private Locale locale; 560 561 /** 562 * Indicates whether this {@code SimpleDateFormat} should use 563 * the DateFormatSymbols. If true, the format and parse methods 564 * use the DateFormatSymbols values. If false, the format and 565 * parse methods call Calendar.getDisplayName or 566 * Calendar.getDisplayNames. 567 */ 568 transient boolean useDateFormatSymbols; 569 570 /** 571 * Constructs a {@code SimpleDateFormat} using the default pattern and 572 * date format symbols for the default 573 * {@link java.util.Locale.Category#FORMAT FORMAT} locale. 574 * <b>Note:</b> This constructor may not support all locales. 575 * For full coverage, use the factory methods in the {@link DateFormat} 576 * class. 577 */ SimpleDateFormat()578 public SimpleDateFormat() { 579 this("", Locale.getDefault(Locale.Category.FORMAT)); 580 applyPatternImpl(LocaleProviderAdapter.getResourceBundleBased().getLocaleResources(locale) 581 .getDateTimePattern(SHORT, SHORT, calendar)); 582 } 583 584 /** 585 * Constructs a {@code SimpleDateFormat} using the given pattern and 586 * the default date format symbols for the default 587 * {@link java.util.Locale.Category#FORMAT FORMAT} locale. 588 * <b>Note:</b> This constructor may not support all locales. 589 * For full coverage, use the factory methods in the {@link DateFormat} 590 * class. 591 * <p>This is equivalent to calling 592 * {@link #SimpleDateFormat(String, Locale) 593 * SimpleDateFormat(pattern, Locale.getDefault(Locale.Category.FORMAT))}. 594 * 595 * @see java.util.Locale#getDefault(java.util.Locale.Category) 596 * @see java.util.Locale.Category#FORMAT 597 * @param pattern the pattern describing the date and time format 598 * @throws NullPointerException if the given pattern is null 599 * @throws IllegalArgumentException if the given pattern is invalid 600 */ SimpleDateFormat(String pattern)601 public SimpleDateFormat(String pattern) 602 { 603 this(pattern, Locale.getDefault(Locale.Category.FORMAT)); 604 } 605 606 /** 607 * Constructs a {@code SimpleDateFormat} using the given pattern and 608 * the default date format symbols for the given locale. 609 * <b>Note:</b> This constructor may not support all locales. 610 * For full coverage, use the factory methods in the {@link DateFormat} 611 * class. 612 * 613 * @param pattern the pattern describing the date and time format 614 * @param locale the locale whose date format symbols should be used 615 * @throws NullPointerException if the given pattern or locale is null 616 * @throws IllegalArgumentException if the given pattern is invalid 617 */ SimpleDateFormat(String pattern, Locale locale)618 public SimpleDateFormat(String pattern, Locale locale) 619 { 620 if (pattern == null || locale == null) { 621 throw new NullPointerException(); 622 } 623 624 initializeCalendar(locale); 625 this.pattern = pattern; 626 this.formatData = DateFormatSymbols.getInstanceRef(locale); 627 this.locale = locale; 628 initialize(locale); 629 } 630 631 /** 632 * Constructs a {@code SimpleDateFormat} using the given pattern and 633 * date format symbols. 634 * 635 * @param pattern the pattern describing the date and time format 636 * @param formatSymbols the date format symbols to be used for formatting 637 * @throws NullPointerException if the given pattern or formatSymbols is null 638 * @throws IllegalArgumentException if the given pattern is invalid 639 */ SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols)640 public SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols) 641 { 642 if (pattern == null || formatSymbols == null) { 643 throw new NullPointerException(); 644 } 645 646 this.pattern = pattern; 647 this.formatData = (DateFormatSymbols) formatSymbols.clone(); 648 this.locale = Locale.getDefault(Locale.Category.FORMAT); 649 initializeCalendar(this.locale); 650 initialize(this.locale); 651 useDateFormatSymbols = true; 652 } 653 654 /* Initialize compiledPattern and numberFormat fields */ initialize(Locale loc)655 private void initialize(Locale loc) { 656 // Verify and compile the given pattern. 657 compiledPattern = compile(pattern); 658 659 /* try the cache first */ 660 numberFormat = cachedNumberFormatData.get(loc); 661 if (numberFormat == null) { /* cache miss */ 662 numberFormat = NumberFormat.getIntegerInstance(loc); 663 numberFormat.setGroupingUsed(false); 664 665 /* update cache */ 666 cachedNumberFormatData.putIfAbsent(loc, numberFormat); 667 } 668 numberFormat = (NumberFormat) numberFormat.clone(); 669 670 initializeDefaultCentury(); 671 } 672 initializeCalendar(Locale loc)673 private void initializeCalendar(Locale loc) { 674 if (calendar == null) { 675 assert loc != null; 676 // The format object must be constructed using the symbols for this zone. 677 // However, the calendar should use the current default TimeZone. 678 // If this is not contained in the locale zone strings, then the zone 679 // will be formatted using generic GMT+/-H:MM nomenclature. 680 calendar = Calendar.getInstance(loc); 681 } 682 } 683 684 /** 685 * Returns the compiled form of the given pattern. The syntax of 686 * the compiled pattern is: 687 * <blockquote> 688 * CompiledPattern: 689 * EntryList 690 * EntryList: 691 * Entry 692 * EntryList Entry 693 * Entry: 694 * TagField 695 * TagField data 696 * TagField: 697 * Tag Length 698 * TaggedData 699 * Tag: 700 * pattern_char_index 701 * TAG_QUOTE_CHARS 702 * Length: 703 * short_length 704 * long_length 705 * TaggedData: 706 * TAG_QUOTE_ASCII_CHAR ascii_char 707 * 708 * </blockquote> 709 * 710 * where `short_length' is an 8-bit unsigned integer between 0 and 711 * 254. `long_length' is a sequence of an 8-bit integer 255 and a 712 * 32-bit signed integer value which is split into upper and lower 713 * 16-bit fields in two char's. `pattern_char_index' is an 8-bit 714 * integer between 0 and 18. `ascii_char' is an 7-bit ASCII 715 * character value. `data' depends on its Tag value. 716 * <p> 717 * If Length is short_length, Tag and short_length are packed in a 718 * single char, as illustrated below. 719 * <blockquote> 720 * char[0] = (Tag << 8) | short_length; 721 * </blockquote> 722 * 723 * If Length is long_length, Tag and 255 are packed in the first 724 * char and a 32-bit integer, as illustrated below. 725 * <blockquote> 726 * char[0] = (Tag << 8) | 255; 727 * char[1] = (char) (long_length >>> 16); 728 * char[2] = (char) (long_length & 0xffff); 729 * </blockquote> 730 * <p> 731 * If Tag is a pattern_char_index, its Length is the number of 732 * pattern characters. For example, if the given pattern is 733 * "yyyy", Tag is 1 and Length is 4, followed by no data. 734 * <p> 735 * If Tag is TAG_QUOTE_CHARS, its Length is the number of char's 736 * following the TagField. For example, if the given pattern is 737 * "'o''clock'", Length is 7 followed by a char sequence of 738 * <code>o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k</code>. 739 * <p> 740 * TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII 741 * character in place of Length. For example, if the given pattern 742 * is "'o'", the TaggedData entry is 743 * <code>((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o')</code>. 744 * 745 * @throws NullPointerException if the given pattern is null 746 * @throws IllegalArgumentException if the given pattern is invalid 747 */ compile(String pattern)748 private char[] compile(String pattern) { 749 int length = pattern.length(); 750 boolean inQuote = false; 751 StringBuilder compiledCode = new StringBuilder(length * 2); 752 StringBuilder tmpBuffer = null; 753 int count = 0, tagcount = 0; 754 int lastTag = -1, prevTag = -1; 755 756 for (int i = 0; i < length; i++) { 757 char c = pattern.charAt(i); 758 759 if (c == '\'') { 760 // '' is treated as a single quote regardless of being 761 // in a quoted section. 762 if ((i + 1) < length) { 763 c = pattern.charAt(i + 1); 764 if (c == '\'') { 765 i++; 766 if (count != 0) { 767 encode(lastTag, count, compiledCode); 768 tagcount++; 769 prevTag = lastTag; 770 lastTag = -1; 771 count = 0; 772 } 773 if (inQuote) { 774 tmpBuffer.append(c); 775 } else { 776 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c)); 777 } 778 continue; 779 } 780 } 781 if (!inQuote) { 782 if (count != 0) { 783 encode(lastTag, count, compiledCode); 784 tagcount++; 785 prevTag = lastTag; 786 lastTag = -1; 787 count = 0; 788 } 789 if (tmpBuffer == null) { 790 tmpBuffer = new StringBuilder(length); 791 } else { 792 tmpBuffer.setLength(0); 793 } 794 inQuote = true; 795 } else { 796 int len = tmpBuffer.length(); 797 if (len == 1) { 798 char ch = tmpBuffer.charAt(0); 799 if (ch < 128) { 800 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | ch)); 801 } else { 802 compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | 1)); 803 compiledCode.append(ch); 804 } 805 } else { 806 encode(TAG_QUOTE_CHARS, len, compiledCode); 807 compiledCode.append(tmpBuffer); 808 } 809 inQuote = false; 810 } 811 continue; 812 } 813 if (inQuote) { 814 tmpBuffer.append(c); 815 continue; 816 } 817 if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')) { 818 if (count != 0) { 819 encode(lastTag, count, compiledCode); 820 tagcount++; 821 prevTag = lastTag; 822 lastTag = -1; 823 count = 0; 824 } 825 if (c < 128) { 826 // In most cases, c would be a delimiter, such as ':'. 827 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c)); 828 } else { 829 // Take any contiguous non-ASCII alphabet characters and 830 // put them in a single TAG_QUOTE_CHARS. 831 int j; 832 for (j = i + 1; j < length; j++) { 833 char d = pattern.charAt(j); 834 if (d == '\'' || (d >= 'a' && d <= 'z' || d >= 'A' && d <= 'Z')) { 835 break; 836 } 837 } 838 encode(TAG_QUOTE_CHARS, j - i, compiledCode); 839 for (; i < j; i++) { 840 compiledCode.append(pattern.charAt(i)); 841 } 842 i--; 843 } 844 continue; 845 } 846 847 int tag; 848 if ((tag = DateFormatSymbols.patternChars.indexOf(c)) == -1) { 849 throw new IllegalArgumentException("Illegal pattern character " + 850 "'" + c + "'"); 851 } 852 if (lastTag == -1 || lastTag == tag) { 853 lastTag = tag; 854 count++; 855 continue; 856 } 857 encode(lastTag, count, compiledCode); 858 tagcount++; 859 prevTag = lastTag; 860 lastTag = tag; 861 count = 1; 862 } 863 864 if (inQuote) { 865 throw new IllegalArgumentException("Unterminated quote"); 866 } 867 868 if (count != 0) { 869 encode(lastTag, count, compiledCode); 870 tagcount++; 871 prevTag = lastTag; 872 } 873 874 forceStandaloneForm = (tagcount == 1 && prevTag == PATTERN_MONTH); 875 876 // Copy the compiled pattern to a char array 877 int len = compiledCode.length(); 878 char[] r = new char[len]; 879 compiledCode.getChars(0, len, r, 0); 880 return r; 881 } 882 883 /** 884 * Encodes the given tag and length and puts encoded char(s) into buffer. 885 */ encode(int tag, int length, StringBuilder buffer)886 private static void encode(int tag, int length, StringBuilder buffer) { 887 if (tag == PATTERN_ISO_ZONE && length >= 4) { 888 throw new IllegalArgumentException("invalid ISO 8601 format: length=" + length); 889 } 890 if (length < 255) { 891 buffer.append((char)(tag << 8 | length)); 892 } else { 893 buffer.append((char)((tag << 8) | 0xff)); 894 buffer.append((char)(length >>> 16)); 895 buffer.append((char)(length & 0xffff)); 896 } 897 } 898 899 /* Initialize the fields we use to disambiguate ambiguous years. Separate 900 * so we can call it from readObject(). 901 */ initializeDefaultCentury()902 private void initializeDefaultCentury() { 903 calendar.setTimeInMillis(System.currentTimeMillis()); 904 calendar.add( Calendar.YEAR, -80 ); 905 parseAmbiguousDatesAsAfter(calendar.getTime()); 906 } 907 908 /* Define one-century window into which to disambiguate dates using 909 * two-digit years. 910 */ parseAmbiguousDatesAsAfter(Date startDate)911 private void parseAmbiguousDatesAsAfter(Date startDate) { 912 defaultCenturyStart = startDate; 913 calendar.setTime(startDate); 914 defaultCenturyStartYear = calendar.get(Calendar.YEAR); 915 } 916 917 /** 918 * Sets the 100-year period 2-digit years will be interpreted as being in 919 * to begin on the date the user specifies. 920 * 921 * @param startDate During parsing, two digit years will be placed in the range 922 * {@code startDate} to {@code startDate + 100 years}. 923 * @see #get2DigitYearStart 924 * @throws NullPointerException if {@code startDate} is {@code null}. 925 * @since 1.2 926 */ set2DigitYearStart(Date startDate)927 public void set2DigitYearStart(Date startDate) { 928 parseAmbiguousDatesAsAfter(new Date(startDate.getTime())); 929 } 930 931 /** 932 * Returns the beginning date of the 100-year period 2-digit years are interpreted 933 * as being within. 934 * 935 * @return the start of the 100-year period into which two digit years are 936 * parsed 937 * @see #set2DigitYearStart 938 * @since 1.2 939 */ get2DigitYearStart()940 public Date get2DigitYearStart() { 941 return (Date) defaultCenturyStart.clone(); 942 } 943 944 /** 945 * Formats the given {@code Date} into a date/time string and appends 946 * the result to the given {@code StringBuffer}. 947 * 948 * @param date the date-time value to be formatted into a date-time string. 949 * @param toAppendTo where the new date-time text is to be appended. 950 * @param pos keeps track on the position of the field within 951 * the returned string. For example, given a date-time text 952 * {@code "1996.07.10 AD at 15:08:56 PDT"}, if the given {@code fieldPosition} 953 * is {@link DateFormat#YEAR_FIELD}, the begin index and end index of 954 * {@code fieldPosition} will be set to 0 and 4, respectively. 955 * Notice that if the same date-time field appears more than once in a 956 * pattern, the {@code fieldPosition} will be set for the first occurrence 957 * of that date-time field. For instance, formatting a {@code Date} to the 958 * date-time string {@code "1 PM PDT (Pacific Daylight Time)"} using the 959 * pattern {@code "h a z (zzzz)"} and the alignment field 960 * {@link DateFormat#TIMEZONE_FIELD}, the begin index and end index of 961 * {@code fieldPosition} will be set to 5 and 8, respectively, for the 962 * first occurrence of the timezone pattern character {@code 'z'}. 963 * @return the formatted date-time string. 964 * @throws NullPointerException if any of the parameters is {@code null}. 965 */ 966 @Override format(Date date, StringBuffer toAppendTo, FieldPosition pos)967 public StringBuffer format(Date date, StringBuffer toAppendTo, 968 FieldPosition pos) 969 { 970 pos.beginIndex = pos.endIndex = 0; 971 return format(date, toAppendTo, pos.getFieldDelegate()); 972 } 973 974 // Called from Format after creating a FieldDelegate format(Date date, StringBuffer toAppendTo, FieldDelegate delegate)975 private StringBuffer format(Date date, StringBuffer toAppendTo, 976 FieldDelegate delegate) { 977 // Convert input date to time field list 978 calendar.setTime(date); 979 980 boolean useDateFormatSymbols = useDateFormatSymbols(); 981 982 for (int i = 0; i < compiledPattern.length; ) { 983 int tag = compiledPattern[i] >>> 8; 984 int count = compiledPattern[i++] & 0xff; 985 if (count == 255) { 986 count = compiledPattern[i++] << 16; 987 count |= compiledPattern[i++]; 988 } 989 990 switch (tag) { 991 case TAG_QUOTE_ASCII_CHAR: 992 toAppendTo.append((char)count); 993 break; 994 995 case TAG_QUOTE_CHARS: 996 toAppendTo.append(compiledPattern, i, count); 997 i += count; 998 break; 999 1000 default: 1001 subFormat(tag, count, delegate, toAppendTo, useDateFormatSymbols); 1002 break; 1003 } 1004 } 1005 return toAppendTo; 1006 } 1007 1008 /** 1009 * Formats an Object producing an {@code AttributedCharacterIterator}. 1010 * You can use the returned {@code AttributedCharacterIterator} 1011 * to build the resulting String, as well as to determine information 1012 * about the resulting String. 1013 * <p> 1014 * Each attribute key of the AttributedCharacterIterator will be of type 1015 * {@code DateFormat.Field}, with the corresponding attribute value 1016 * being the same as the attribute key. 1017 * 1018 * @throws NullPointerException if obj is null. 1019 * @throws IllegalArgumentException if the Format cannot format the 1020 * given object, or if the Format's pattern string is invalid. 1021 * @param obj The object to format 1022 * @return AttributedCharacterIterator describing the formatted value. 1023 * @since 1.4 1024 */ 1025 @Override formatToCharacterIterator(Object obj)1026 public AttributedCharacterIterator formatToCharacterIterator(Object obj) { 1027 StringBuffer sb = new StringBuffer(); 1028 CharacterIteratorFieldDelegate delegate = new 1029 CharacterIteratorFieldDelegate(); 1030 1031 if (obj instanceof Date) { 1032 format((Date)obj, sb, delegate); 1033 } 1034 else if (obj instanceof Number) { 1035 format(new Date(((Number)obj).longValue()), sb, delegate); 1036 } 1037 else if (obj == null) { 1038 throw new NullPointerException( 1039 "formatToCharacterIterator must be passed non-null object"); 1040 } 1041 else { 1042 throw new IllegalArgumentException( 1043 "Cannot format given Object as a Date"); 1044 } 1045 return delegate.getIterator(sb.toString()); 1046 } 1047 1048 // Map index into pattern character string to Calendar field number 1049 private static final int[] PATTERN_INDEX_TO_CALENDAR_FIELD = { 1050 Calendar.ERA, 1051 Calendar.YEAR, 1052 Calendar.MONTH, 1053 Calendar.DATE, 1054 Calendar.HOUR_OF_DAY, 1055 Calendar.HOUR_OF_DAY, 1056 Calendar.MINUTE, 1057 Calendar.SECOND, 1058 Calendar.MILLISECOND, 1059 Calendar.DAY_OF_WEEK, 1060 Calendar.DAY_OF_YEAR, 1061 Calendar.DAY_OF_WEEK_IN_MONTH, 1062 Calendar.WEEK_OF_YEAR, 1063 Calendar.WEEK_OF_MONTH, 1064 Calendar.AM_PM, 1065 Calendar.HOUR, 1066 Calendar.HOUR, 1067 Calendar.ZONE_OFFSET, 1068 Calendar.ZONE_OFFSET, 1069 CalendarBuilder.WEEK_YEAR, // Pseudo Calendar field 1070 CalendarBuilder.ISO_DAY_OF_WEEK, // Pseudo Calendar field 1071 Calendar.ZONE_OFFSET, 1072 Calendar.MONTH 1073 }; 1074 1075 // Map index into pattern character string to DateFormat field number 1076 private static final int[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD = { 1077 DateFormat.ERA_FIELD, 1078 DateFormat.YEAR_FIELD, 1079 DateFormat.MONTH_FIELD, 1080 DateFormat.DATE_FIELD, 1081 DateFormat.HOUR_OF_DAY1_FIELD, 1082 DateFormat.HOUR_OF_DAY0_FIELD, 1083 DateFormat.MINUTE_FIELD, 1084 DateFormat.SECOND_FIELD, 1085 DateFormat.MILLISECOND_FIELD, 1086 DateFormat.DAY_OF_WEEK_FIELD, 1087 DateFormat.DAY_OF_YEAR_FIELD, 1088 DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD, 1089 DateFormat.WEEK_OF_YEAR_FIELD, 1090 DateFormat.WEEK_OF_MONTH_FIELD, 1091 DateFormat.AM_PM_FIELD, 1092 DateFormat.HOUR1_FIELD, 1093 DateFormat.HOUR0_FIELD, 1094 DateFormat.TIMEZONE_FIELD, 1095 DateFormat.TIMEZONE_FIELD, 1096 DateFormat.YEAR_FIELD, 1097 DateFormat.DAY_OF_WEEK_FIELD, 1098 DateFormat.TIMEZONE_FIELD, 1099 DateFormat.MONTH_FIELD 1100 }; 1101 1102 // Maps from DecimalFormatSymbols index to Field constant 1103 private static final Field[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID = { 1104 Field.ERA, 1105 Field.YEAR, 1106 Field.MONTH, 1107 Field.DAY_OF_MONTH, 1108 Field.HOUR_OF_DAY1, 1109 Field.HOUR_OF_DAY0, 1110 Field.MINUTE, 1111 Field.SECOND, 1112 Field.MILLISECOND, 1113 Field.DAY_OF_WEEK, 1114 Field.DAY_OF_YEAR, 1115 Field.DAY_OF_WEEK_IN_MONTH, 1116 Field.WEEK_OF_YEAR, 1117 Field.WEEK_OF_MONTH, 1118 Field.AM_PM, 1119 Field.HOUR1, 1120 Field.HOUR0, 1121 Field.TIME_ZONE, 1122 Field.TIME_ZONE, 1123 Field.YEAR, 1124 Field.DAY_OF_WEEK, 1125 Field.TIME_ZONE, 1126 Field.MONTH 1127 }; 1128 1129 /** 1130 * Private member function that does the real date/time formatting. 1131 */ subFormat(int patternCharIndex, int count, FieldDelegate delegate, StringBuffer buffer, boolean useDateFormatSymbols)1132 private void subFormat(int patternCharIndex, int count, 1133 FieldDelegate delegate, StringBuffer buffer, 1134 boolean useDateFormatSymbols) 1135 { 1136 int maxIntCount = Integer.MAX_VALUE; 1137 String current = null; 1138 int beginOffset = buffer.length(); 1139 1140 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1141 int value; 1142 if (field == CalendarBuilder.WEEK_YEAR) { 1143 if (calendar.isWeekDateSupported()) { 1144 value = calendar.getWeekYear(); 1145 } else { 1146 // use calendar year 'y' instead 1147 patternCharIndex = PATTERN_YEAR; 1148 field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1149 value = calendar.get(field); 1150 } 1151 } else if (field == CalendarBuilder.ISO_DAY_OF_WEEK) { 1152 value = CalendarBuilder.toISODayOfWeek(calendar.get(Calendar.DAY_OF_WEEK)); 1153 } else { 1154 value = calendar.get(field); 1155 } 1156 1157 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT; 1158 if (!useDateFormatSymbols && field < Calendar.ZONE_OFFSET 1159 && patternCharIndex != PATTERN_MONTH_STANDALONE) { 1160 current = calendar.getDisplayName(field, style, locale); 1161 } 1162 1163 // Note: zeroPaddingNumber() assumes that maxDigits is either 1164 // 2 or maxIntCount. If we make any changes to this, 1165 // zeroPaddingNumber() must be fixed. 1166 1167 switch (patternCharIndex) { 1168 case PATTERN_ERA: // 'G' 1169 if (useDateFormatSymbols) { 1170 String[] eras = formatData.getEras(); 1171 if (value < eras.length) { 1172 current = eras[value]; 1173 } 1174 } 1175 if (current == null) { 1176 current = ""; 1177 } 1178 break; 1179 1180 case PATTERN_WEEK_YEAR: // 'Y' 1181 case PATTERN_YEAR: // 'y' 1182 if (calendar instanceof GregorianCalendar) { 1183 if (count != 2) { 1184 zeroPaddingNumber(value, count, maxIntCount, buffer); 1185 } else { 1186 zeroPaddingNumber(value, 2, 2, buffer); 1187 } // clip 1996 to 96 1188 } else { 1189 if (current == null) { 1190 zeroPaddingNumber(value, style == Calendar.LONG ? 1 : count, 1191 maxIntCount, buffer); 1192 } 1193 } 1194 break; 1195 1196 case PATTERN_MONTH: // 'M' (context sensitive) 1197 if (useDateFormatSymbols) { 1198 String[] months; 1199 if (count >= 4) { 1200 months = formatData.getMonths(); 1201 current = months[value]; 1202 } else if (count == 3) { 1203 months = formatData.getShortMonths(); 1204 current = months[value]; 1205 } 1206 } else { 1207 if (count < 3) { 1208 current = null; 1209 } else if (forceStandaloneForm) { 1210 current = calendar.getDisplayName(field, style | 0x8000, locale); 1211 if (current == null) { 1212 current = calendar.getDisplayName(field, style, locale); 1213 } 1214 } 1215 } 1216 if (current == null) { 1217 zeroPaddingNumber(value+1, count, maxIntCount, buffer); 1218 } 1219 break; 1220 1221 case PATTERN_MONTH_STANDALONE: // 'L' 1222 assert current == null; 1223 if (locale == null) { 1224 String[] months; 1225 if (count >= 4) { 1226 months = formatData.getMonths(); 1227 current = months[value]; 1228 } else if (count == 3) { 1229 months = formatData.getShortMonths(); 1230 current = months[value]; 1231 } 1232 } else { 1233 if (count >= 3) { 1234 current = calendar.getDisplayName(field, style | 0x8000, locale); 1235 } 1236 } 1237 if (current == null) { 1238 zeroPaddingNumber(value+1, count, maxIntCount, buffer); 1239 } 1240 break; 1241 1242 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59 1243 if (current == null) { 1244 if (value == 0) { 1245 zeroPaddingNumber(calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1, 1246 count, maxIntCount, buffer); 1247 } else { 1248 zeroPaddingNumber(value, count, maxIntCount, buffer); 1249 } 1250 } 1251 break; 1252 1253 case PATTERN_DAY_OF_WEEK: // 'E' 1254 if (useDateFormatSymbols) { 1255 String[] weekdays; 1256 if (count >= 4) { 1257 weekdays = formatData.getWeekdays(); 1258 current = weekdays[value]; 1259 } else { // count < 4, use abbreviated form if exists 1260 weekdays = formatData.getShortWeekdays(); 1261 current = weekdays[value]; 1262 } 1263 } 1264 break; 1265 1266 case PATTERN_AM_PM: // 'a' 1267 if (useDateFormatSymbols) { 1268 String[] ampm = formatData.getAmPmStrings(); 1269 current = ampm[value]; 1270 } 1271 break; 1272 1273 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM 1274 if (current == null) { 1275 if (value == 0) { 1276 zeroPaddingNumber(calendar.getLeastMaximum(Calendar.HOUR) + 1, 1277 count, maxIntCount, buffer); 1278 } else { 1279 zeroPaddingNumber(value, count, maxIntCount, buffer); 1280 } 1281 } 1282 break; 1283 1284 case PATTERN_ZONE_NAME: // 'z' 1285 if (current == null) { 1286 if (formatData.locale == null || formatData.isZoneStringsSet) { 1287 int zoneIndex = 1288 formatData.getZoneIndex(calendar.getTimeZone().getID()); 1289 if (zoneIndex == -1) { 1290 value = calendar.get(Calendar.ZONE_OFFSET) + 1291 calendar.get(Calendar.DST_OFFSET); 1292 buffer.append(ZoneInfoFile.toCustomID(value)); 1293 } else { 1294 int index = (calendar.get(Calendar.DST_OFFSET) == 0) ? 1: 3; 1295 if (count < 4) { 1296 // Use the short name 1297 index++; 1298 } 1299 String[][] zoneStrings = formatData.getZoneStringsWrapper(); 1300 buffer.append(zoneStrings[zoneIndex][index]); 1301 } 1302 } else { 1303 TimeZone tz = calendar.getTimeZone(); 1304 boolean daylight = (calendar.get(Calendar.DST_OFFSET) != 0); 1305 int tzstyle = (count < 4 ? TimeZone.SHORT : TimeZone.LONG); 1306 buffer.append(tz.getDisplayName(daylight, tzstyle, formatData.locale)); 1307 } 1308 } 1309 break; 1310 1311 case PATTERN_ZONE_VALUE: // 'Z' ("-/+hhmm" form) 1312 value = (calendar.get(Calendar.ZONE_OFFSET) + 1313 calendar.get(Calendar.DST_OFFSET)) / 60000; 1314 1315 int width = 4; 1316 if (value >= 0) { 1317 buffer.append('+'); 1318 } else { 1319 width++; 1320 } 1321 1322 int num = (value / 60) * 100 + (value % 60); 1323 CalendarUtils.sprintf0d(buffer, num, width); 1324 break; 1325 1326 case PATTERN_ISO_ZONE: // 'X' 1327 value = calendar.get(Calendar.ZONE_OFFSET) 1328 + calendar.get(Calendar.DST_OFFSET); 1329 1330 if (value == 0) { 1331 buffer.append('Z'); 1332 break; 1333 } 1334 1335 value /= 60000; 1336 if (value >= 0) { 1337 buffer.append('+'); 1338 } else { 1339 buffer.append('-'); 1340 value = -value; 1341 } 1342 1343 CalendarUtils.sprintf0d(buffer, value / 60, 2); 1344 if (count == 1) { 1345 break; 1346 } 1347 1348 if (count == 3) { 1349 buffer.append(':'); 1350 } 1351 CalendarUtils.sprintf0d(buffer, value % 60, 2); 1352 break; 1353 1354 default: 1355 // case PATTERN_DAY_OF_MONTH: // 'd' 1356 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59 1357 // case PATTERN_MINUTE: // 'm' 1358 // case PATTERN_SECOND: // 's' 1359 // case PATTERN_MILLISECOND: // 'S' 1360 // case PATTERN_DAY_OF_YEAR: // 'D' 1361 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F' 1362 // case PATTERN_WEEK_OF_YEAR: // 'w' 1363 // case PATTERN_WEEK_OF_MONTH: // 'W' 1364 // case PATTERN_HOUR0: // 'K' eg, 11PM + 1 hour =>> 0 AM 1365 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' pseudo field, Monday = 1, ..., Sunday = 7 1366 if (current == null) { 1367 zeroPaddingNumber(value, count, maxIntCount, buffer); 1368 } 1369 break; 1370 } // switch (patternCharIndex) 1371 1372 if (current != null) { 1373 buffer.append(current); 1374 } 1375 1376 int fieldID = PATTERN_INDEX_TO_DATE_FORMAT_FIELD[patternCharIndex]; 1377 Field f = PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID[patternCharIndex]; 1378 1379 delegate.formatted(fieldID, f, f, beginOffset, buffer.length(), buffer); 1380 } 1381 1382 /** 1383 * Formats a number with the specified minimum and maximum number of digits. 1384 */ zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer)1385 private void zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer) 1386 { 1387 // Optimization for 1, 2 and 4 digit numbers. This should 1388 // cover most cases of formatting date/time related items. 1389 // Note: This optimization code assumes that maxDigits is 1390 // either 2 or Integer.MAX_VALUE (maxIntCount in format()). 1391 try { 1392 if (zeroDigit == 0) { 1393 zeroDigit = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getZeroDigit(); 1394 } 1395 if (value >= 0) { 1396 if (value < 100 && minDigits >= 1 && minDigits <= 2) { 1397 if (value < 10) { 1398 if (minDigits == 2) { 1399 buffer.append(zeroDigit); 1400 } 1401 buffer.append((char)(zeroDigit + value)); 1402 } else { 1403 buffer.append((char)(zeroDigit + value / 10)); 1404 buffer.append((char)(zeroDigit + value % 10)); 1405 } 1406 return; 1407 } else if (value >= 1000 && value < 10000) { 1408 if (minDigits == 4) { 1409 buffer.append((char)(zeroDigit + value / 1000)); 1410 value %= 1000; 1411 buffer.append((char)(zeroDigit + value / 100)); 1412 value %= 100; 1413 buffer.append((char)(zeroDigit + value / 10)); 1414 buffer.append((char)(zeroDigit + value % 10)); 1415 return; 1416 } 1417 if (minDigits == 2 && maxDigits == 2) { 1418 zeroPaddingNumber(value % 100, 2, 2, buffer); 1419 return; 1420 } 1421 } 1422 } 1423 } catch (Exception e) { 1424 } 1425 1426 numberFormat.setMinimumIntegerDigits(minDigits); 1427 numberFormat.setMaximumIntegerDigits(maxDigits); 1428 numberFormat.format((long)value, buffer, DontCareFieldPosition.INSTANCE); 1429 } 1430 1431 1432 /** 1433 * Parses text from a string to produce a {@code Date}. 1434 * <p> 1435 * The method attempts to parse text starting at the index given by 1436 * {@code pos}. 1437 * If parsing succeeds, then the index of {@code pos} is updated 1438 * to the index after the last character used (parsing does not necessarily 1439 * use all characters up to the end of the string), and the parsed 1440 * date is returned. The updated {@code pos} can be used to 1441 * indicate the starting point for the next call to this method. 1442 * If an error occurs, then the index of {@code pos} is not 1443 * changed, the error index of {@code pos} is set to the index of 1444 * the character where the error occurred, and null is returned. 1445 * 1446 * <p>This parsing operation uses the {@link DateFormat#calendar 1447 * calendar} to produce a {@code Date}. All of the {@code 1448 * calendar}'s date-time fields are {@linkplain Calendar#clear() 1449 * cleared} before parsing, and the {@code calendar}'s default 1450 * values of the date-time fields are used for any missing 1451 * date-time information. For example, the year value of the 1452 * parsed {@code Date} is 1970 with {@link GregorianCalendar} if 1453 * no year value is given from the parsing operation. The {@code 1454 * TimeZone} value may be overwritten, depending on the given 1455 * pattern and the time zone value in {@code text}. Any {@code 1456 * TimeZone} value that has previously been set by a call to 1457 * {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need 1458 * to be restored for further operations. 1459 * 1460 * @param text A {@code String}, part of which should be parsed. 1461 * @param pos A {@code ParsePosition} object with index and error 1462 * index information as described above. 1463 * @return A {@code Date} parsed from the string. In case of 1464 * error, returns null. 1465 * @throws NullPointerException if {@code text} or {@code pos} is null. 1466 */ 1467 @Override parse(String text, ParsePosition pos)1468 public Date parse(String text, ParsePosition pos) 1469 { 1470 checkNegativeNumberExpression(); 1471 1472 int start = pos.index; 1473 int oldStart = start; 1474 int textLength = text.length(); 1475 1476 boolean[] ambiguousYear = {false}; 1477 1478 CalendarBuilder calb = new CalendarBuilder(); 1479 1480 for (int i = 0; i < compiledPattern.length; ) { 1481 int tag = compiledPattern[i] >>> 8; 1482 int count = compiledPattern[i++] & 0xff; 1483 if (count == 255) { 1484 count = compiledPattern[i++] << 16; 1485 count |= compiledPattern[i++]; 1486 } 1487 1488 switch (tag) { 1489 case TAG_QUOTE_ASCII_CHAR: 1490 if (start >= textLength || text.charAt(start) != (char)count) { 1491 pos.index = oldStart; 1492 pos.errorIndex = start; 1493 return null; 1494 } 1495 start++; 1496 break; 1497 1498 case TAG_QUOTE_CHARS: 1499 while (count-- > 0) { 1500 if (start >= textLength || text.charAt(start) != compiledPattern[i++]) { 1501 pos.index = oldStart; 1502 pos.errorIndex = start; 1503 return null; 1504 } 1505 start++; 1506 } 1507 break; 1508 1509 default: 1510 // Peek the next pattern to determine if we need to 1511 // obey the number of pattern letters for 1512 // parsing. It's required when parsing contiguous 1513 // digit text (e.g., "20010704") with a pattern which 1514 // has no delimiters between fields, like "yyyyMMdd". 1515 boolean obeyCount = false; 1516 1517 // In Arabic, a minus sign for a negative number is put after 1518 // the number. Even in another locale, a minus sign can be 1519 // put after a number using DateFormat.setNumberFormat(). 1520 // If both the minus sign and the field-delimiter are '-', 1521 // subParse() needs to determine whether a '-' after a number 1522 // in the given text is a delimiter or is a minus sign for the 1523 // preceding number. We give subParse() a clue based on the 1524 // information in compiledPattern. 1525 boolean useFollowingMinusSignAsDelimiter = false; 1526 1527 if (i < compiledPattern.length) { 1528 int nextTag = compiledPattern[i] >>> 8; 1529 int nextCount = compiledPattern[i] & 0xff; 1530 obeyCount = shouldObeyCount(nextTag, nextCount); 1531 1532 if (hasFollowingMinusSign && 1533 (nextTag == TAG_QUOTE_ASCII_CHAR || 1534 nextTag == TAG_QUOTE_CHARS)) { 1535 1536 if (nextTag != TAG_QUOTE_ASCII_CHAR) { 1537 nextCount = compiledPattern[i+1]; 1538 } 1539 1540 if (nextCount == minusSign) { 1541 useFollowingMinusSignAsDelimiter = true; 1542 } 1543 } 1544 } 1545 start = subParse(text, start, tag, count, obeyCount, 1546 ambiguousYear, pos, 1547 useFollowingMinusSignAsDelimiter, calb); 1548 if (start < 0) { 1549 pos.index = oldStart; 1550 return null; 1551 } 1552 } 1553 } 1554 1555 // At this point the fields of Calendar have been set. Calendar 1556 // will fill in default values for missing fields when the time 1557 // is computed. 1558 1559 pos.index = start; 1560 1561 Date parsedDate; 1562 try { 1563 parsedDate = calb.establish(calendar).getTime(); 1564 // If the year value is ambiguous, 1565 // then the two-digit year == the default start year 1566 if (ambiguousYear[0]) { 1567 if (parsedDate.before(defaultCenturyStart)) { 1568 parsedDate = calb.addYear(100).establish(calendar).getTime(); 1569 } 1570 } 1571 } 1572 // An IllegalArgumentException will be thrown by Calendar.getTime() 1573 // if any fields are out of range, e.g., MONTH == 17. 1574 catch (IllegalArgumentException e) { 1575 pos.errorIndex = start; 1576 pos.index = oldStart; 1577 return null; 1578 } 1579 1580 return parsedDate; 1581 } 1582 1583 /* If the next tag/pattern is a <Numeric_Field> then the parser 1584 * should consider the count of digits while parsing the contigous digits 1585 * for the current tag/pattern 1586 */ shouldObeyCount(int tag, int count)1587 private boolean shouldObeyCount(int tag, int count) { 1588 switch (tag) { 1589 case PATTERN_MONTH: 1590 case PATTERN_MONTH_STANDALONE: 1591 return count <= 2; 1592 case PATTERN_YEAR: 1593 case PATTERN_DAY_OF_MONTH: 1594 case PATTERN_HOUR_OF_DAY1: 1595 case PATTERN_HOUR_OF_DAY0: 1596 case PATTERN_MINUTE: 1597 case PATTERN_SECOND: 1598 case PATTERN_MILLISECOND: 1599 case PATTERN_DAY_OF_YEAR: 1600 case PATTERN_DAY_OF_WEEK_IN_MONTH: 1601 case PATTERN_WEEK_OF_YEAR: 1602 case PATTERN_WEEK_OF_MONTH: 1603 case PATTERN_HOUR1: 1604 case PATTERN_HOUR0: 1605 case PATTERN_WEEK_YEAR: 1606 case PATTERN_ISO_DAY_OF_WEEK: 1607 return true; 1608 default: 1609 return false; 1610 } 1611 } 1612 1613 /** 1614 * Private code-size reduction function used by subParse. 1615 * @param text the time text being parsed. 1616 * @param start where to start parsing. 1617 * @param field the date field being parsed. 1618 * @param data the string array to parsed. 1619 * @return the new start position if matching succeeded; a negative number 1620 * indicating matching failure, otherwise. 1621 */ matchString(String text, int start, int field, String[] data, CalendarBuilder calb)1622 private int matchString(String text, int start, int field, String[] data, CalendarBuilder calb) 1623 { 1624 int i = 0; 1625 int count = data.length; 1626 1627 if (field == Calendar.DAY_OF_WEEK) { 1628 i = 1; 1629 } 1630 1631 // There may be multiple strings in the data[] array which begin with 1632 // the same prefix (e.g., Cerven and Cervenec (June and July) in Czech). 1633 // We keep track of the longest match, and return that. Note that this 1634 // unfortunately requires us to test all array elements. 1635 int bestMatchLength = 0, bestMatch = -1; 1636 for (; i<count; ++i) 1637 { 1638 int length = data[i].length(); 1639 // Always compare if we have no match yet; otherwise only compare 1640 // against potentially better matches (longer strings). 1641 if (length > bestMatchLength && 1642 text.regionMatches(true, start, data[i], 0, length)) 1643 { 1644 bestMatch = i; 1645 bestMatchLength = length; 1646 } 1647 } 1648 if (bestMatch >= 0) 1649 { 1650 calb.set(field, bestMatch); 1651 return start + bestMatchLength; 1652 } 1653 return -start; 1654 } 1655 1656 /** 1657 * Performs the same thing as matchString(String, int, int, 1658 * String[]). This method takes a Map<String, Integer> instead of 1659 * String[]. 1660 */ matchString(String text, int start, int field, Map<String,Integer> data, CalendarBuilder calb)1661 private int matchString(String text, int start, int field, 1662 Map<String,Integer> data, CalendarBuilder calb) { 1663 if (data != null) { 1664 // TODO: make this default when it's in the spec. 1665 if (data instanceof SortedMap) { 1666 for (String name : data.keySet()) { 1667 if (text.regionMatches(true, start, name, 0, name.length())) { 1668 calb.set(field, data.get(name)); 1669 return start + name.length(); 1670 } 1671 } 1672 return -start; 1673 } 1674 1675 String bestMatch = null; 1676 1677 for (String name : data.keySet()) { 1678 int length = name.length(); 1679 if (bestMatch == null || length > bestMatch.length()) { 1680 if (text.regionMatches(true, start, name, 0, length)) { 1681 bestMatch = name; 1682 } 1683 } 1684 } 1685 1686 if (bestMatch != null) { 1687 calb.set(field, data.get(bestMatch)); 1688 return start + bestMatch.length(); 1689 } 1690 } 1691 return -start; 1692 } 1693 matchZoneString(String text, int start, String[] zoneNames)1694 private int matchZoneString(String text, int start, String[] zoneNames) { 1695 for (int i = 1; i <= 4; ++i) { 1696 // Checking long and short zones [1 & 2], 1697 // and long and short daylight [3 & 4]. 1698 String zoneName = zoneNames[i]; 1699 if (zoneName.isEmpty()) { 1700 // fill in by retrieving single name 1701 zoneName = TimeZoneNameUtility.retrieveDisplayName( 1702 zoneNames[0], i >= 3, i % 2, locale); 1703 zoneNames[i] = zoneName; 1704 } 1705 if (text.regionMatches(true, start, 1706 zoneName, 0, zoneName.length())) { 1707 return i; 1708 } 1709 } 1710 return -1; 1711 } 1712 matchDSTString(String text, int start, int zoneIndex, int standardIndex, String[][] zoneStrings)1713 private boolean matchDSTString(String text, int start, int zoneIndex, int standardIndex, 1714 String[][] zoneStrings) { 1715 int index = standardIndex + 2; 1716 String zoneName = zoneStrings[zoneIndex][index]; 1717 if (text.regionMatches(true, start, 1718 zoneName, 0, zoneName.length())) { 1719 return true; 1720 } 1721 return false; 1722 } 1723 1724 /** 1725 * find time zone 'text' matched zoneStrings and set to internal 1726 * calendar. 1727 */ subParseZoneString(String text, int start, CalendarBuilder calb)1728 private int subParseZoneString(String text, int start, CalendarBuilder calb) { 1729 boolean useSameName = false; // true if standard and daylight time use the same abbreviation. 1730 TimeZone currentTimeZone = getTimeZone(); 1731 1732 // At this point, check for named time zones by looking through 1733 // the locale data from the TimeZoneNames strings. 1734 // Want to be able to parse both short and long forms. 1735 int zoneIndex = formatData.getZoneIndex(currentTimeZone.getID()); 1736 TimeZone tz = null; 1737 String[][] zoneStrings = formatData.getZoneStringsWrapper(); 1738 String[] zoneNames = null; 1739 int nameIndex = 0; 1740 if (zoneIndex != -1) { 1741 zoneNames = zoneStrings[zoneIndex]; 1742 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1743 if (nameIndex <= 2) { 1744 // Check if the standard name (abbr) and the daylight name are the same. 1745 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1746 } 1747 tz = TimeZone.getTimeZone(zoneNames[0]); 1748 } 1749 } 1750 if (tz == null) { 1751 zoneIndex = formatData.getZoneIndex(TimeZone.getDefault().getID()); 1752 if (zoneIndex != -1) { 1753 zoneNames = zoneStrings[zoneIndex]; 1754 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1755 if (nameIndex <= 2) { 1756 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1757 } 1758 tz = TimeZone.getTimeZone(zoneNames[0]); 1759 } 1760 } 1761 } 1762 1763 if (tz == null) { 1764 int len = zoneStrings.length; 1765 for (int i = 0; i < len; i++) { 1766 zoneNames = zoneStrings[i]; 1767 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1768 if (nameIndex <= 2) { 1769 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1770 } 1771 tz = TimeZone.getTimeZone(zoneNames[0]); 1772 break; 1773 } 1774 } 1775 } 1776 if (tz != null) { // Matched any ? 1777 if (!tz.equals(currentTimeZone)) { 1778 setTimeZone(tz); 1779 } 1780 // If the time zone matched uses the same name 1781 // (abbreviation) for both standard and daylight time, 1782 // let the time zone in the Calendar decide which one. 1783 // 1784 // Also if tz.getDSTSaving() returns 0 for DST, use tz to 1785 // determine the local time. (6645292) 1786 int dstAmount = (nameIndex >= 3) ? tz.getDSTSavings() : 0; 1787 if (!(useSameName || (nameIndex >= 3 && dstAmount == 0))) { 1788 calb.clear(Calendar.ZONE_OFFSET).set(Calendar.DST_OFFSET, dstAmount); 1789 } 1790 return (start + zoneNames[nameIndex].length()); 1791 } 1792 return -start; 1793 } 1794 1795 /** 1796 * Parses numeric forms of time zone offset, such as "hh:mm", and 1797 * sets calb to the parsed value. 1798 * 1799 * @param text the text to be parsed 1800 * @param start the character position to start parsing 1801 * @param sign 1: positive; -1: negative 1802 * @param count 0: 'Z' or "GMT+hh:mm" parsing; 1 - 3: the number of 'X's 1803 * @param colon true - colon required between hh and mm; false - no colon required 1804 * @param calb a CalendarBuilder in which the parsed value is stored 1805 * @return updated parsed position, or its negative value to indicate a parsing error 1806 */ subParseNumericZone(String text, int start, int sign, int count, boolean colon, CalendarBuilder calb)1807 private int subParseNumericZone(String text, int start, int sign, int count, 1808 boolean colon, CalendarBuilder calb) { 1809 int index = start; 1810 1811 parse: 1812 try { 1813 char c = text.charAt(index++); 1814 // Parse hh 1815 int hours; 1816 if (!isDigit(c)) { 1817 break parse; 1818 } 1819 hours = c - '0'; 1820 c = text.charAt(index++); 1821 if (isDigit(c)) { 1822 hours = hours * 10 + (c - '0'); 1823 } else { 1824 // If no colon in RFC 822 or 'X' (ISO), two digits are 1825 // required. 1826 if (count > 0 || !colon) { 1827 break parse; 1828 } 1829 --index; 1830 } 1831 if (hours > 23) { 1832 break parse; 1833 } 1834 int minutes = 0; 1835 if (count != 1) { 1836 // Proceed with parsing mm 1837 c = text.charAt(index++); 1838 if (colon) { 1839 if (c != ':') { 1840 break parse; 1841 } 1842 c = text.charAt(index++); 1843 } 1844 if (!isDigit(c)) { 1845 break parse; 1846 } 1847 minutes = c - '0'; 1848 c = text.charAt(index++); 1849 if (!isDigit(c)) { 1850 break parse; 1851 } 1852 minutes = minutes * 10 + (c - '0'); 1853 if (minutes > 59) { 1854 break parse; 1855 } 1856 } 1857 minutes += hours * 60; 1858 calb.set(Calendar.ZONE_OFFSET, minutes * MILLIS_PER_MINUTE * sign) 1859 .set(Calendar.DST_OFFSET, 0); 1860 return index; 1861 } catch (IndexOutOfBoundsException e) { 1862 } 1863 return 1 - index; // -(index - 1) 1864 } 1865 isDigit(char c)1866 private boolean isDigit(char c) { 1867 return c >= '0' && c <= '9'; 1868 } 1869 1870 /** 1871 * Private member function that converts the parsed date strings into 1872 * timeFields. Returns -start (for ParsePosition) if failed. 1873 * @param text the time text to be parsed. 1874 * @param start where to start parsing. 1875 * @param patternCharIndex the index of the pattern character. 1876 * @param count the count of a pattern character. 1877 * @param obeyCount if true, then the next field directly abuts this one, 1878 * and we should use the count to know when to stop parsing. 1879 * @param ambiguousYear return parameter; upon return, if ambiguousYear[0] 1880 * is true, then a two-digit year was parsed and may need to be readjusted. 1881 * @param origPos origPos.errorIndex is used to return an error index 1882 * at which a parse error occurred, if matching failure occurs. 1883 * @return the new start position if matching succeeded; -1 indicating 1884 * matching failure, otherwise. In case matching failure occurred, 1885 * an error index is set to origPos.errorIndex. 1886 */ subParse(String text, int start, int patternCharIndex, int count, boolean obeyCount, boolean[] ambiguousYear, ParsePosition origPos, boolean useFollowingMinusSignAsDelimiter, CalendarBuilder calb)1887 private int subParse(String text, int start, int patternCharIndex, int count, 1888 boolean obeyCount, boolean[] ambiguousYear, 1889 ParsePosition origPos, 1890 boolean useFollowingMinusSignAsDelimiter, CalendarBuilder calb) { 1891 Number number; 1892 int value = 0; 1893 ParsePosition pos = new ParsePosition(0); 1894 pos.index = start; 1895 if (patternCharIndex == PATTERN_WEEK_YEAR && !calendar.isWeekDateSupported()) { 1896 // use calendar year 'y' instead 1897 patternCharIndex = PATTERN_YEAR; 1898 } 1899 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1900 1901 // If there are any spaces here, skip over them. If we hit the end 1902 // of the string, then fail. 1903 for (;;) { 1904 if (pos.index >= text.length()) { 1905 origPos.errorIndex = start; 1906 return -1; 1907 } 1908 char c = text.charAt(pos.index); 1909 if (c != ' ' && c != '\t') { 1910 break; 1911 } 1912 ++pos.index; 1913 } 1914 // Remember the actual start index 1915 int actualStart = pos.index; 1916 1917 parsing: 1918 { 1919 // We handle a few special cases here where we need to parse 1920 // a number value. We handle further, more generic cases below. We need 1921 // to handle some of them here because some fields require extra processing on 1922 // the parsed value. 1923 if (patternCharIndex == PATTERN_HOUR_OF_DAY1 || 1924 patternCharIndex == PATTERN_HOUR1 || 1925 (patternCharIndex == PATTERN_MONTH && count <= 2) || 1926 (patternCharIndex == PATTERN_MONTH_STANDALONE && count <= 2) || 1927 patternCharIndex == PATTERN_YEAR || 1928 patternCharIndex == PATTERN_WEEK_YEAR) { 1929 // It would be good to unify this with the obeyCount logic below, 1930 // but that's going to be difficult. 1931 if (obeyCount) { 1932 if ((start+count) > text.length()) { 1933 break parsing; 1934 } 1935 number = numberFormat.parse(text.substring(0, start+count), pos); 1936 } else { 1937 number = numberFormat.parse(text, pos); 1938 } 1939 if (number == null) { 1940 if (patternCharIndex != PATTERN_YEAR || calendar instanceof GregorianCalendar) { 1941 break parsing; 1942 } 1943 } else { 1944 value = number.intValue(); 1945 1946 if (useFollowingMinusSignAsDelimiter && (value < 0) && 1947 (((pos.index < text.length()) && 1948 (text.charAt(pos.index) != minusSign)) || 1949 ((pos.index == text.length()) && 1950 (text.charAt(pos.index-1) == minusSign)))) { 1951 value = -value; 1952 pos.index--; 1953 } 1954 } 1955 } 1956 1957 boolean useDateFormatSymbols = useDateFormatSymbols(); 1958 1959 int index; 1960 switch (patternCharIndex) { 1961 case PATTERN_ERA: // 'G' 1962 if (useDateFormatSymbols) { 1963 if ((index = matchString(text, start, Calendar.ERA, formatData.getEras(), calb)) > 0) { 1964 return index; 1965 } 1966 } else { 1967 Map<String, Integer> map = getDisplayNamesMap(field, locale); 1968 if ((index = matchString(text, start, field, map, calb)) > 0) { 1969 return index; 1970 } 1971 } 1972 break parsing; 1973 1974 case PATTERN_WEEK_YEAR: // 'Y' 1975 case PATTERN_YEAR: // 'y' 1976 if (!(calendar instanceof GregorianCalendar)) { 1977 // calendar might have text representations for year values, 1978 // such as "\u5143" in JapaneseImperialCalendar. 1979 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT; 1980 Map<String, Integer> map = calendar.getDisplayNames(field, style, locale); 1981 if (map != null) { 1982 if ((index = matchString(text, start, field, map, calb)) > 0) { 1983 return index; 1984 } 1985 } 1986 calb.set(field, value); 1987 return pos.index; 1988 } 1989 1990 // If there are 3 or more YEAR pattern characters, this indicates 1991 // that the year value is to be treated literally, without any 1992 // two-digit year adjustments (e.g., from "01" to 2001). Otherwise 1993 // we made adjustments to place the 2-digit year in the proper 1994 // century, for parsed strings from "00" to "99". Any other string 1995 // is treated literally: "2250", "-1", "1", "002". 1996 if (count <= 2 && (pos.index - actualStart) == 2 1997 && Character.isDigit(text.charAt(actualStart)) 1998 && Character.isDigit(text.charAt(actualStart + 1))) { 1999 // Assume for example that the defaultCenturyStart is 6/18/1903. 2000 // This means that two-digit years will be forced into the range 2001 // 6/18/1903 to 6/17/2003. As a result, years 00, 01, and 02 2002 // correspond to 2000, 2001, and 2002. Years 04, 05, etc. correspond 2003 // to 1904, 1905, etc. If the year is 03, then it is 2003 if the 2004 // other fields specify a date before 6/18, or 1903 if they specify a 2005 // date afterwards. As a result, 03 is an ambiguous year. All other 2006 // two-digit years are unambiguous. 2007 int ambiguousTwoDigitYear = defaultCenturyStartYear % 100; 2008 ambiguousYear[0] = value == ambiguousTwoDigitYear; 2009 value += (defaultCenturyStartYear/100)*100 + 2010 (value < ambiguousTwoDigitYear ? 100 : 0); 2011 } 2012 calb.set(field, value); 2013 return pos.index; 2014 2015 case PATTERN_MONTH: // 'M' 2016 if (count <= 2) // i.e., M or MM. 2017 { 2018 // Don't want to parse the month if it is a string 2019 // while pattern uses numeric style: M or MM. 2020 // [We computed 'value' above.] 2021 calb.set(Calendar.MONTH, value - 1); 2022 return pos.index; 2023 } 2024 2025 if (useDateFormatSymbols) { 2026 // count >= 3 // i.e., MMM or MMMM 2027 // Want to be able to parse both short and long forms. 2028 // Try count == 4 first: 2029 int newStart; 2030 if ((newStart = matchString(text, start, Calendar.MONTH, 2031 formatData.getMonths(), calb)) > 0) { 2032 return newStart; 2033 } 2034 // count == 4 failed, now try count == 3 2035 if ((index = matchString(text, start, Calendar.MONTH, 2036 formatData.getShortMonths(), calb)) > 0) { 2037 return index; 2038 } 2039 } else { 2040 Map<String, Integer> map = getDisplayContextNamesMap(field, locale); 2041 if ((index = matchString(text, start, field, map, calb)) > 0) { 2042 return index; 2043 } 2044 } 2045 break parsing; 2046 2047 case PATTERN_MONTH_STANDALONE: // 'L' 2048 if (count <= 2) { 2049 // Don't want to parse the month if it is a string 2050 // while pattern uses numeric style: L or LL 2051 //[we computed 'value' above.] 2052 calb.set(Calendar.MONTH, value - 1); 2053 return pos.index; 2054 } 2055 Map<String, Integer> maps = getDisplayNamesMap(field, locale); 2056 if ((index = matchString(text, start, field, maps, calb)) > 0) { 2057 return index; 2058 } 2059 break parsing; 2060 2061 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59 2062 if (!isLenient()) { 2063 // Validate the hour value in non-lenient 2064 if (value < 1 || value > 24) { 2065 break parsing; 2066 } 2067 } 2068 // [We computed 'value' above.] 2069 if (value == calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1) { 2070 value = 0; 2071 } 2072 calb.set(Calendar.HOUR_OF_DAY, value); 2073 return pos.index; 2074 2075 case PATTERN_DAY_OF_WEEK: // 'E' 2076 { 2077 if (useDateFormatSymbols) { 2078 // Want to be able to parse both short and long forms. 2079 // Try count == 4 (DDDD) first: 2080 int newStart; 2081 if ((newStart=matchString(text, start, Calendar.DAY_OF_WEEK, 2082 formatData.getWeekdays(), calb)) > 0) { 2083 return newStart; 2084 } 2085 // DDDD failed, now try DDD 2086 if ((index = matchString(text, start, Calendar.DAY_OF_WEEK, 2087 formatData.getShortWeekdays(), calb)) > 0) { 2088 return index; 2089 } 2090 } else { 2091 int[] styles = { Calendar.LONG, Calendar.SHORT }; 2092 for (int style : styles) { 2093 Map<String,Integer> map = calendar.getDisplayNames(field, style, locale); 2094 if ((index = matchString(text, start, field, map, calb)) > 0) { 2095 return index; 2096 } 2097 } 2098 } 2099 } 2100 break parsing; 2101 2102 case PATTERN_AM_PM: // 'a' 2103 if (useDateFormatSymbols) { 2104 if ((index = matchString(text, start, Calendar.AM_PM, 2105 formatData.getAmPmStrings(), calb)) > 0) { 2106 return index; 2107 } 2108 } else { 2109 Map<String,Integer> map = getDisplayNamesMap(field, locale); 2110 if ((index = matchString(text, start, field, map, calb)) > 0) { 2111 return index; 2112 } 2113 } 2114 break parsing; 2115 2116 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM 2117 if (!isLenient()) { 2118 // Validate the hour value in non-lenient 2119 if (value < 1 || value > 12) { 2120 break parsing; 2121 } 2122 } 2123 // [We computed 'value' above.] 2124 if (value == calendar.getLeastMaximum(Calendar.HOUR) + 1) { 2125 value = 0; 2126 } 2127 calb.set(Calendar.HOUR, value); 2128 return pos.index; 2129 2130 case PATTERN_ZONE_NAME: // 'z' 2131 case PATTERN_ZONE_VALUE: // 'Z' 2132 { 2133 int sign = 0; 2134 try { 2135 char c = text.charAt(pos.index); 2136 if (c == '+') { 2137 sign = 1; 2138 } else if (c == '-') { 2139 sign = -1; 2140 } 2141 if (sign == 0) { 2142 // Try parsing a custom time zone "GMT+hh:mm" or "GMT". 2143 if ((c == 'G' || c == 'g') 2144 && (text.length() - start) >= GMT.length() 2145 && text.regionMatches(true, start, GMT, 0, GMT.length())) { 2146 pos.index = start + GMT.length(); 2147 2148 if ((text.length() - pos.index) > 0) { 2149 c = text.charAt(pos.index); 2150 if (c == '+') { 2151 sign = 1; 2152 } else if (c == '-') { 2153 sign = -1; 2154 } 2155 } 2156 2157 if (sign == 0) { /* "GMT" without offset */ 2158 calb.set(Calendar.ZONE_OFFSET, 0) 2159 .set(Calendar.DST_OFFSET, 0); 2160 return pos.index; 2161 } 2162 2163 // Parse the rest as "hh:mm" 2164 int i = subParseNumericZone(text, ++pos.index, 2165 sign, 0, true, calb); 2166 if (i > 0) { 2167 return i; 2168 } 2169 pos.index = -i; 2170 } else { 2171 // Try parsing the text as a time zone 2172 // name or abbreviation. 2173 int i = subParseZoneString(text, pos.index, calb); 2174 if (i > 0) { 2175 return i; 2176 } 2177 pos.index = -i; 2178 } 2179 } else { 2180 // Parse the rest as "hhmm" (RFC 822) 2181 int i = subParseNumericZone(text, ++pos.index, 2182 sign, 0, false, calb); 2183 if (i > 0) { 2184 return i; 2185 } 2186 pos.index = -i; 2187 } 2188 } catch (IndexOutOfBoundsException e) { 2189 } 2190 } 2191 break parsing; 2192 2193 case PATTERN_ISO_ZONE: // 'X' 2194 { 2195 if ((text.length() - pos.index) <= 0) { 2196 break parsing; 2197 } 2198 2199 int sign; 2200 char c = text.charAt(pos.index); 2201 if (c == 'Z') { 2202 calb.set(Calendar.ZONE_OFFSET, 0).set(Calendar.DST_OFFSET, 0); 2203 return ++pos.index; 2204 } 2205 2206 // parse text as "+/-hh[[:]mm]" based on count 2207 if (c == '+') { 2208 sign = 1; 2209 } else if (c == '-') { 2210 sign = -1; 2211 } else { 2212 ++pos.index; 2213 break parsing; 2214 } 2215 int i = subParseNumericZone(text, ++pos.index, sign, count, 2216 count == 3, calb); 2217 if (i > 0) { 2218 return i; 2219 } 2220 pos.index = -i; 2221 } 2222 break parsing; 2223 2224 default: 2225 // case PATTERN_DAY_OF_MONTH: // 'd' 2226 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59 2227 // case PATTERN_MINUTE: // 'm' 2228 // case PATTERN_SECOND: // 's' 2229 // case PATTERN_MILLISECOND: // 'S' 2230 // case PATTERN_DAY_OF_YEAR: // 'D' 2231 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F' 2232 // case PATTERN_WEEK_OF_YEAR: // 'w' 2233 // case PATTERN_WEEK_OF_MONTH: // 'W' 2234 // case PATTERN_HOUR0: // 'K' 0-based. eg, 11PM + 1 hour =>> 0 AM 2235 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' (pseudo field); 2236 2237 // Handle "generic" fields 2238 if (obeyCount) { 2239 if ((start+count) > text.length()) { 2240 break parsing; 2241 } 2242 number = numberFormat.parse(text.substring(0, start+count), pos); 2243 } else { 2244 number = numberFormat.parse(text, pos); 2245 } 2246 if (number != null) { 2247 value = number.intValue(); 2248 2249 if (useFollowingMinusSignAsDelimiter && (value < 0) && 2250 (((pos.index < text.length()) && 2251 (text.charAt(pos.index) != minusSign)) || 2252 ((pos.index == text.length()) && 2253 (text.charAt(pos.index-1) == minusSign)))) { 2254 value = -value; 2255 pos.index--; 2256 } 2257 2258 calb.set(field, value); 2259 return pos.index; 2260 } 2261 break parsing; 2262 } 2263 } 2264 2265 // Parsing failed. 2266 origPos.errorIndex = pos.index; 2267 return -1; 2268 } 2269 2270 /** 2271 * Returns true if the DateFormatSymbols has been set explicitly or locale 2272 * is null. 2273 */ useDateFormatSymbols()2274 private boolean useDateFormatSymbols() { 2275 return useDateFormatSymbols || locale == null; 2276 } 2277 2278 /** 2279 * Translates a pattern, mapping each character in the from string to the 2280 * corresponding character in the to string. 2281 * 2282 * @throws IllegalArgumentException if the given pattern is invalid 2283 */ translatePattern(String pattern, String from, String to)2284 private String translatePattern(String pattern, String from, String to) { 2285 StringBuilder result = new StringBuilder(); 2286 boolean inQuote = false; 2287 for (int i = 0; i < pattern.length(); ++i) { 2288 char c = pattern.charAt(i); 2289 if (inQuote) { 2290 if (c == '\'') { 2291 inQuote = false; 2292 } 2293 } 2294 else { 2295 if (c == '\'') { 2296 inQuote = true; 2297 } else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) { 2298 int ci = from.indexOf(c); 2299 if (ci >= 0) { 2300 // patternChars is longer than localPatternChars due 2301 // to serialization compatibility. The pattern letters 2302 // unsupported by localPatternChars pass through. 2303 if (ci < to.length()) { 2304 c = to.charAt(ci); 2305 } 2306 } else { 2307 throw new IllegalArgumentException("Illegal pattern " + 2308 " character '" + 2309 c + "'"); 2310 } 2311 } 2312 } 2313 result.append(c); 2314 } 2315 if (inQuote) { 2316 throw new IllegalArgumentException("Unfinished quote in pattern"); 2317 } 2318 return result.toString(); 2319 } 2320 2321 /** 2322 * Returns a pattern string describing this date format. 2323 * 2324 * @return a pattern string describing this date format. 2325 */ toPattern()2326 public String toPattern() { 2327 return pattern; 2328 } 2329 2330 /** 2331 * Returns a localized pattern string describing this date format. 2332 * 2333 * @return a localized pattern string describing this date format. 2334 */ toLocalizedPattern()2335 public String toLocalizedPattern() { 2336 return translatePattern(pattern, 2337 DateFormatSymbols.patternChars, 2338 formatData.getLocalPatternChars()); 2339 } 2340 2341 /** 2342 * Applies the given pattern string to this date format. 2343 * 2344 * @param pattern the new date and time pattern for this date format 2345 * @throws NullPointerException if the given pattern is null 2346 * @throws IllegalArgumentException if the given pattern is invalid 2347 */ applyPattern(String pattern)2348 public void applyPattern(String pattern) 2349 { 2350 applyPatternImpl(pattern); 2351 } 2352 applyPatternImpl(String pattern)2353 private void applyPatternImpl(String pattern) { 2354 compiledPattern = compile(pattern); 2355 this.pattern = pattern; 2356 } 2357 2358 /** 2359 * Applies the given localized pattern string to this date format. 2360 * 2361 * @param pattern a String to be mapped to the new date and time format 2362 * pattern for this format 2363 * @throws NullPointerException if the given pattern is null 2364 * @throws IllegalArgumentException if the given pattern is invalid 2365 */ applyLocalizedPattern(String pattern)2366 public void applyLocalizedPattern(String pattern) { 2367 String p = translatePattern(pattern, 2368 formatData.getLocalPatternChars(), 2369 DateFormatSymbols.patternChars); 2370 compiledPattern = compile(p); 2371 this.pattern = p; 2372 } 2373 2374 /** 2375 * Gets a copy of the date and time format symbols of this date format. 2376 * 2377 * @return the date and time format symbols of this date format 2378 * @see #setDateFormatSymbols 2379 */ getDateFormatSymbols()2380 public DateFormatSymbols getDateFormatSymbols() 2381 { 2382 return (DateFormatSymbols)formatData.clone(); 2383 } 2384 2385 /** 2386 * Sets the date and time format symbols of this date format. 2387 * 2388 * @param newFormatSymbols the new date and time format symbols 2389 * @throws NullPointerException if the given newFormatSymbols is null 2390 * @see #getDateFormatSymbols 2391 */ setDateFormatSymbols(DateFormatSymbols newFormatSymbols)2392 public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols) 2393 { 2394 this.formatData = (DateFormatSymbols)newFormatSymbols.clone(); 2395 useDateFormatSymbols = true; 2396 } 2397 2398 /** 2399 * Creates a copy of this {@code SimpleDateFormat}. This also 2400 * clones the format's date format symbols. 2401 * 2402 * @return a clone of this {@code SimpleDateFormat} 2403 */ 2404 @Override clone()2405 public Object clone() { 2406 SimpleDateFormat other = (SimpleDateFormat) super.clone(); 2407 other.formatData = (DateFormatSymbols) formatData.clone(); 2408 return other; 2409 } 2410 2411 /** 2412 * Returns the hash code value for this {@code SimpleDateFormat} object. 2413 * 2414 * @return the hash code value for this {@code SimpleDateFormat} object. 2415 */ 2416 @Override hashCode()2417 public int hashCode() 2418 { 2419 return pattern.hashCode(); 2420 // just enough fields for a reasonable distribution 2421 } 2422 2423 /** 2424 * Compares the given object with this {@code SimpleDateFormat} for 2425 * equality. 2426 * 2427 * @return true if the given object is equal to this 2428 * {@code SimpleDateFormat} 2429 */ 2430 @Override equals(Object obj)2431 public boolean equals(Object obj) 2432 { 2433 if (!super.equals(obj)) { 2434 return false; // super does class check 2435 } 2436 SimpleDateFormat that = (SimpleDateFormat) obj; 2437 return (pattern.equals(that.pattern) 2438 && formatData.equals(that.formatData)); 2439 } 2440 2441 private static final int[] REST_OF_STYLES = { 2442 Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT, Calendar.LONG_STANDALONE, 2443 }; getDisplayNamesMap(int field, Locale locale)2444 private Map<String, Integer> getDisplayNamesMap(int field, Locale locale) { 2445 Map<String, Integer> map = calendar.getDisplayNames(field, Calendar.SHORT_FORMAT, locale); 2446 // Get all SHORT and LONG styles (avoid NARROW styles). 2447 for (int style : REST_OF_STYLES) { 2448 Map<String, Integer> m = calendar.getDisplayNames(field, style, locale); 2449 if (m != null) { 2450 map.putAll(m); 2451 } 2452 } 2453 return map; 2454 } 2455 2456 /** 2457 * Obtains display names map, taking the context into account. Currently only 2458 * the month name pattern 'M' is context dependent. 2459 */ getDisplayContextNamesMap(int field, Locale locale)2460 private Map<String, Integer> getDisplayContextNamesMap(int field, Locale locale) { 2461 Map<String, Integer> map = calendar.getDisplayNames(field, 2462 forceStandaloneForm ? Calendar.SHORT_STANDALONE : Calendar.SHORT_FORMAT, locale); 2463 // Get the LONG style 2464 Map<String, Integer> m = calendar.getDisplayNames(field, 2465 forceStandaloneForm ? Calendar.LONG_STANDALONE : Calendar.LONG_FORMAT, locale); 2466 if (m != null) { 2467 map.putAll(m); 2468 } 2469 return map; 2470 } 2471 2472 /** 2473 * After reading an object from the input stream, the format 2474 * pattern in the object is verified. 2475 * 2476 * @throws InvalidObjectException if the pattern is invalid 2477 */ 2478 @java.io.Serial readObject(ObjectInputStream stream)2479 private void readObject(ObjectInputStream stream) 2480 throws IOException, ClassNotFoundException { 2481 stream.defaultReadObject(); 2482 2483 try { 2484 compiledPattern = compile(pattern); 2485 } catch (Exception e) { 2486 throw new InvalidObjectException("invalid pattern"); 2487 } 2488 2489 if (serialVersionOnStream < 1) { 2490 // didn't have defaultCenturyStart field 2491 initializeDefaultCentury(); 2492 } 2493 else { 2494 // fill in dependent transient field 2495 parseAmbiguousDatesAsAfter(defaultCenturyStart); 2496 } 2497 serialVersionOnStream = currentSerialVersion; 2498 2499 // If the deserialized object has a SimpleTimeZone, try 2500 // to replace it with a ZoneInfo equivalent in order to 2501 // be compatible with the SimpleTimeZone-based 2502 // implementation as much as possible. 2503 TimeZone tz = getTimeZone(); 2504 if (tz instanceof SimpleTimeZone) { 2505 String id = tz.getID(); 2506 TimeZone zi = TimeZone.getTimeZone(id); 2507 if (zi != null && zi.hasSameRules(tz) && zi.getID().equals(id)) { 2508 setTimeZone(zi); 2509 } 2510 } 2511 } 2512 2513 /** 2514 * Analyze the negative subpattern of DecimalFormat and set/update values 2515 * as necessary. 2516 */ checkNegativeNumberExpression()2517 private void checkNegativeNumberExpression() { 2518 if ((numberFormat instanceof DecimalFormat) && 2519 !numberFormat.equals(originalNumberFormat)) { 2520 String numberPattern = ((DecimalFormat)numberFormat).toPattern(); 2521 if (!numberPattern.equals(originalNumberPattern)) { 2522 hasFollowingMinusSign = false; 2523 2524 int separatorIndex = numberPattern.indexOf(';'); 2525 // If the negative subpattern is not absent, we have to analayze 2526 // it in order to check if it has a following minus sign. 2527 if (separatorIndex > -1) { 2528 int minusIndex = numberPattern.indexOf('-', separatorIndex); 2529 if ((minusIndex > numberPattern.lastIndexOf('0')) && 2530 (minusIndex > numberPattern.lastIndexOf('#'))) { 2531 hasFollowingMinusSign = true; 2532 minusSign = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getMinusSign(); 2533 } 2534 } 2535 originalNumberPattern = numberPattern; 2536 } 2537 originalNumberFormat = numberFormat; 2538 } 2539 } 2540 2541 } 2542