1 /* 2 * Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* 27 * (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</code> 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</code> 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>, <code>getDateInstance</code>, or 70 * <code>getDateTimeInstance</code> in <code>DateFormat</code>. 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</code> methods as desired. 74 * For more information on using these methods, see 75 * {@link DateFormat}. 76 * 77 * <h3>Date and Time Patterns</h3> 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'</code> to <code>'Z'</code> and from <code>'a'</code> to 83 * <code>'z'</code> are interpreted as pattern letters representing the 84 * components of a date or time string. 85 * Text can be quoted using single quotes (<code>'</code>) to avoid 86 * interpretation. 87 * <code>"''"</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'</code> to <code>'Z'</code> and from <code>'a'</code> to 94 * <code>'z'</code> 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</code> 108 * <td>Era designator 109 * <td><a href="#text">Text</a> 110 * <td><code>AD</code> 111 * <tr> 112 * <th scope="row"><code>y</code> 113 * <td>Year 114 * <td><a href="#year">Year</a> 115 * <td><code>1996</code>; <code>96</code> 116 * <tr> 117 * <th scope="row"><code>Y</code> 118 * <td>Week year 119 * <td><a href="#year">Year</a> 120 * <td><code>2009</code>; <code>09</code> 121 * <tr> 122 * <th scope="row"><code>M</code> 123 * <td>Month in year (context sensitive) 124 * <td><a href="#month">Month</a> 125 * <td><code>July</code>; <code>Jul</code>; <code>07</code> 126 * <tr> 127 * <th scope="row"><code>L</code> 128 * <td>Month in year (standalone form) 129 * <td><a href="#month">Month</a> 130 * <td><code>July</code>; <code>Jul</code>; <code>07</code> 131 * <tr> 132 * <th scope="row"><code>w</code> 133 * <td>Week in year 134 * <td><a href="#number">Number</a> 135 * <td><code>27</code> 136 * <tr> 137 * <th scope="row"><code>W</code> 138 * <td>Week in month 139 * <td><a href="#number">Number</a> 140 * <td><code>2</code> 141 * <tr> 142 * <th scope="row"><code>D</code> 143 * <td>Day in year 144 * <td><a href="#number">Number</a> 145 * <td><code>189</code> 146 * <tr> 147 * <th scope="row"><code>d</code> 148 * <td>Day in month 149 * <td><a href="#number">Number</a> 150 * <td><code>10</code> 151 * <tr> 152 * <th scope="row"><code>F</code> 153 * <td>Day of week in month 154 * <td><a href="#number">Number</a> 155 * <td><code>2</code> 156 * <tr> 157 * <th scope="row"><code>E</code> 158 * <td>Day name in week 159 * <td><a href="#text">Text</a> 160 * <td><code>Tuesday</code>; <code>Tue</code> 161 * <tr> 162 * <th scope="row"><code>u</code> 163 * <td>Day number of week (1 = Monday, ..., 7 = Sunday) 164 * <td><a href="#number">Number</a> 165 * <td><code>1</code> 166 * <tr> 167 * <th scope="row"><code>a</code> 168 * <td>Am/pm marker 169 * <td><a href="#text">Text</a> 170 * <td><code>PM</code> 171 * <tr> 172 * <th scope="row"><code>H</code> 173 * <td>Hour in day (0-23) 174 * <td><a href="#number">Number</a> 175 * <td><code>0</code> 176 * <tr> 177 * <th scope="row"><code>k</code> 178 * <td>Hour in day (1-24) 179 * <td><a href="#number">Number</a> 180 * <td><code>24</code> 181 * <tr> 182 * <th scope="row"><code>K</code> 183 * <td>Hour in am/pm (0-11) 184 * <td><a href="#number">Number</a> 185 * <td><code>0</code> 186 * <tr> 187 * <th scope="row"><code>h</code> 188 * <td>Hour in am/pm (1-12) 189 * <td><a href="#number">Number</a> 190 * <td><code>12</code> 191 * <tr> 192 * <th scope="row"><code>m</code> 193 * <td>Minute in hour 194 * <td><a href="#number">Number</a> 195 * <td><code>30</code> 196 * <tr> 197 * <th scope="row"><code>s</code> 198 * <td>Second in minute 199 * <td><a href="#number">Number</a> 200 * <td><code>55</code> 201 * <tr> 202 * <th scope="row"><code>S</code> 203 * <td>Millisecond 204 * <td><a href="#number">Number</a> 205 * <td><code>978</code> 206 * <tr> 207 * <th scope="row"><code>z</code> 208 * <td>Time zone 209 * <td><a href="#timezone">General time zone</a> 210 * <td><code>Pacific Standard Time</code>; <code>PST</code>; <code>GMT-08:00</code> 211 * <tr> 212 * <th scope="row"><code>Z</code> 213 * <td>Time zone 214 * <td><a href="#rfc822timezone">RFC 822 time zone</a> 215 * <td><code>-0800</code> 216 * <tr> 217 * <th scope="row"><code>X</code> 218 * <td>Time zone 219 * <td><a href="#iso8601timezone">ISO 8601 time zone</a> 220 * <td><code>-08</code>; <code>-0800</code>; <code>-08:00</code> 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</code> 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</code> 253 * instance is created. For example, using a pattern of "MM/dd/yy" and a 254 * <code>SimpleDateFormat</code> 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</code> <i>Sign</i> <i>Hours</i> <code>:</code> <i>Minutes</i> 307 * <i>Sign:</i> one of 308 * <code>+ -</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</code></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</code> 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</code> 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 * <h4>Examples</h4> 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"</code> 389 * <td><code>2001.07.04 AD at 12:08:56 PDT</code> 390 * <tr> 391 * <th scope="row"><code>"EEE, MMM d, ''yy"</code> 392 * <td><code>Wed, Jul 4, '01</code> 393 * <tr> 394 * <th scope="row"><code>"h:mm a"</code> 395 * <td><code>12:08 PM</code> 396 * <tr> 397 * <th scope="row"><code>"hh 'o''clock' a, zzzz"</code> 398 * <td><code>12 o'clock PM, Pacific Daylight Time</code> 399 * <tr> 400 * <th scope="row"><code>"K:mm a, z"</code> 401 * <td><code>0:08 PM, PDT</code> 402 * <tr> 403 * <th scope="row"><code>"yyyyy.MMMMM.dd GGG hh:mm aaa"</code> 404 * <td><code>02001.July.04 AD 12:08 PM</code> 405 * <tr> 406 * <th scope="row"><code>"EEE, d MMM yyyy HH:mm:ss Z"</code> 407 * <td><code>Wed, 4 Jul 2001 12:08:56 -0700</code> 408 * <tr> 409 * <th scope="row"><code>"yyMMddHHmmssZ"</code> 410 * <td><code>010704120856-0700</code> 411 * <tr> 412 * <th scope="row"><code>"yyyy-MM-dd'T'HH:mm:ss.SSSZ"</code> 413 * <td><code>2001-07-04T12:08:56.235-0700</code> 414 * <tr> 415 * <th scope="row"><code>"yyyy-MM-dd'T'HH:mm:ss.SSSXXX"</code> 416 * <td><code>2001-07-04T12:08:56.235-07:00</code> 417 * <tr> 418 * <th scope="row"><code>"YYYY-'W'ww-u"</code> 419 * <td><code>2001-W27-3</code> 420 * </tbody> 421 * </table> 422 * </blockquote> 423 * 424 * <h4><a id="synchronization">Synchronization</a></h4> 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 * 432 * @see <a href="http://docs.oracle.com/javase/tutorial/i18n/format/simpleDateFormat.html">Java Tutorial</a> 433 * @see java.util.Calendar 434 * @see java.util.TimeZone 435 * @see DateFormat 436 * @see DateFormatSymbols 437 * @author Mark Davis, Chen-Lieh Huang, Alan Liu 438 * @since 1.1 439 */ 440 public class SimpleDateFormat extends DateFormat { 441 442 // the official serial version ID which says cryptically 443 // which version we're compatible with 444 static final long serialVersionUID = 4774881970558875024L; 445 446 // the internal serial version which says which version was written 447 // - 0 (default) for version up to JDK 1.1.3 448 // - 1 for version from JDK 1.1.4, which includes a new field 449 static final int currentSerialVersion = 1; 450 451 /** 452 * The version of the serialized data on the stream. Possible values: 453 * <ul> 454 * <li><b>0</b> or not present on stream: JDK 1.1.3. This version 455 * has no <code>defaultCenturyStart</code> on stream. 456 * <li><b>1</b> JDK 1.1.4 or later. This version adds 457 * <code>defaultCenturyStart</code>. 458 * </ul> 459 * When streaming out this class, the most recent format 460 * and the highest allowable <code>serialVersionOnStream</code> 461 * is written. 462 * @serial 463 * @since 1.1.4 464 */ 465 private int serialVersionOnStream = currentSerialVersion; 466 467 /** 468 * The pattern string of this formatter. This is always a non-localized 469 * pattern. May not be null. See class documentation for details. 470 * @serial 471 */ 472 private String pattern; 473 474 /** 475 * Saved numberFormat and pattern. 476 * @see SimpleDateFormat#checkNegativeNumberExpression 477 */ 478 private transient NumberFormat originalNumberFormat; 479 private transient String originalNumberPattern; 480 481 /** 482 * The minus sign to be used with format and parse. 483 */ 484 private transient char minusSign = '-'; 485 486 /** 487 * True when a negative sign follows a number. 488 * (True as default in Arabic.) 489 */ 490 private transient boolean hasFollowingMinusSign = false; 491 492 /** 493 * True if standalone form needs to be used. 494 */ 495 private transient boolean forceStandaloneForm = false; 496 497 /** 498 * The compiled pattern. 499 */ 500 private transient char[] compiledPattern; 501 502 /** 503 * Tags for the compiled pattern. 504 */ 505 private static final int TAG_QUOTE_ASCII_CHAR = 100; 506 private static final int TAG_QUOTE_CHARS = 101; 507 508 /** 509 * Locale dependent digit zero. 510 * @see #zeroPaddingNumber 511 * @see java.text.DecimalFormatSymbols#getZeroDigit 512 */ 513 private transient char zeroDigit; 514 515 /** 516 * The symbols used by this formatter for week names, month names, 517 * etc. May not be null. 518 * @serial 519 * @see java.text.DateFormatSymbols 520 */ 521 private DateFormatSymbols formatData; 522 523 /** 524 * We map dates with two-digit years into the century starting at 525 * <code>defaultCenturyStart</code>, which may be any date. May 526 * not be null. 527 * @serial 528 * @since 1.1.4 529 */ 530 private Date defaultCenturyStart; 531 532 private transient int defaultCenturyStartYear; 533 534 private static final int MILLIS_PER_MINUTE = 60 * 1000; 535 536 // For time zones that have no names, use strings GMT+minutes and 537 // GMT-minutes. For instance, in France the time zone is GMT+60. 538 private static final String GMT = "GMT"; 539 540 /** 541 * Cache NumberFormat instances with Locale key. 542 */ 543 private static final ConcurrentMap<Locale, NumberFormat> cachedNumberFormatData 544 = new ConcurrentHashMap<>(3); 545 546 /** 547 * The Locale used to instantiate this 548 * <code>SimpleDateFormat</code>. The value may be null if this object 549 * has been created by an older <code>SimpleDateFormat</code> and 550 * deserialized. 551 * 552 * @serial 553 * @since 1.6 554 */ 555 private Locale locale; 556 557 /** 558 * Indicates whether this <code>SimpleDateFormat</code> should use 559 * the DateFormatSymbols. If true, the format and parse methods 560 * use the DateFormatSymbols values. If false, the format and 561 * parse methods call Calendar.getDisplayName or 562 * Calendar.getDisplayNames. 563 */ 564 transient boolean useDateFormatSymbols; 565 566 /** 567 * Constructs a <code>SimpleDateFormat</code> using the default pattern and 568 * date format symbols for the default 569 * {@link java.util.Locale.Category#FORMAT FORMAT} locale. 570 * <b>Note:</b> This constructor may not support all locales. 571 * For full coverage, use the factory methods in the {@link DateFormat} 572 * class. 573 */ 574 public SimpleDateFormat() { 575 this("", Locale.getDefault(Locale.Category.FORMAT)); 576 applyPatternImpl(LocaleProviderAdapter.getResourceBundleBased().getLocaleResources(locale) 577 .getDateTimePattern(SHORT, SHORT, calendar)); 578 } 579 580 /** 581 * Constructs a <code>SimpleDateFormat</code> using the given pattern and 582 * the default date format symbols for the default 583 * {@link java.util.Locale.Category#FORMAT FORMAT} locale. 584 * <b>Note:</b> This constructor may not support all locales. 585 * For full coverage, use the factory methods in the {@link DateFormat} 586 * class. 587 * <p>This is equivalent to calling 588 * {@link #SimpleDateFormat(String, Locale) 589 * SimpleDateFormat(pattern, Locale.getDefault(Locale.Category.FORMAT))}. 590 * 591 * @see java.util.Locale#getDefault(java.util.Locale.Category) 592 * @see java.util.Locale.Category#FORMAT 593 * @param pattern the pattern describing the date and time format 594 * @exception NullPointerException if the given pattern is null 595 * @exception IllegalArgumentException if the given pattern is invalid 596 */ 597 public SimpleDateFormat(String pattern) 598 { 599 this(pattern, Locale.getDefault(Locale.Category.FORMAT)); 600 } 601 602 /** 603 * Constructs a <code>SimpleDateFormat</code> using the given pattern and 604 * the default date format symbols for the given locale. 605 * <b>Note:</b> This constructor may not support all locales. 606 * For full coverage, use the factory methods in the {@link DateFormat} 607 * class. 608 * 609 * @param pattern the pattern describing the date and time format 610 * @param locale the locale whose date format symbols should be used 611 * @exception NullPointerException if the given pattern or locale is null 612 * @exception IllegalArgumentException if the given pattern is invalid 613 */ 614 public SimpleDateFormat(String pattern, Locale locale) 615 { 616 if (pattern == null || locale == null) { 617 throw new NullPointerException(); 618 } 619 620 initializeCalendar(locale); 621 this.pattern = pattern; 622 this.formatData = DateFormatSymbols.getInstanceRef(locale); 623 this.locale = locale; 624 initialize(locale); 625 } 626 627 /** 628 * Constructs a <code>SimpleDateFormat</code> using the given pattern and 629 * date format symbols. 630 * 631 * @param pattern the pattern describing the date and time format 632 * @param formatSymbols the date format symbols to be used for formatting 633 * @exception NullPointerException if the given pattern or formatSymbols is null 634 * @exception IllegalArgumentException if the given pattern is invalid 635 */ 636 public SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols) 637 { 638 if (pattern == null || formatSymbols == null) { 639 throw new NullPointerException(); 640 } 641 642 this.pattern = pattern; 643 this.formatData = (DateFormatSymbols) formatSymbols.clone(); 644 this.locale = Locale.getDefault(Locale.Category.FORMAT); 645 initializeCalendar(this.locale); 646 initialize(this.locale); 647 useDateFormatSymbols = true; 648 } 649 650 /* Initialize compiledPattern and numberFormat fields */ 651 private void initialize(Locale loc) { 652 // Verify and compile the given pattern. 653 compiledPattern = compile(pattern); 654 655 /* try the cache first */ 656 numberFormat = cachedNumberFormatData.get(loc); 657 if (numberFormat == null) { /* cache miss */ 658 numberFormat = NumberFormat.getIntegerInstance(loc); 659 numberFormat.setGroupingUsed(false); 660 661 /* update cache */ 662 cachedNumberFormatData.putIfAbsent(loc, numberFormat); 663 } 664 numberFormat = (NumberFormat) numberFormat.clone(); 665 666 initializeDefaultCentury(); 667 } 668 669 private void initializeCalendar(Locale loc) { 670 if (calendar == null) { 671 assert loc != null; 672 // The format object must be constructed using the symbols for this zone. 673 // However, the calendar should use the current default TimeZone. 674 // If this is not contained in the locale zone strings, then the zone 675 // will be formatted using generic GMT+/-H:MM nomenclature. 676 calendar = Calendar.getInstance(loc); 677 } 678 } 679 680 /** 681 * Returns the compiled form of the given pattern. The syntax of 682 * the compiled pattern is: 683 * <blockquote> 684 * CompiledPattern: 685 * EntryList 686 * EntryList: 687 * Entry 688 * EntryList Entry 689 * Entry: 690 * TagField 691 * TagField data 692 * TagField: 693 * Tag Length 694 * TaggedData 695 * Tag: 696 * pattern_char_index 697 * TAG_QUOTE_CHARS 698 * Length: 699 * short_length 700 * long_length 701 * TaggedData: 702 * TAG_QUOTE_ASCII_CHAR ascii_char 703 * 704 * </blockquote> 705 * 706 * where `short_length' is an 8-bit unsigned integer between 0 and 707 * 254. `long_length' is a sequence of an 8-bit integer 255 and a 708 * 32-bit signed integer value which is split into upper and lower 709 * 16-bit fields in two char's. `pattern_char_index' is an 8-bit 710 * integer between 0 and 18. `ascii_char' is an 7-bit ASCII 711 * character value. `data' depends on its Tag value. 712 * <p> 713 * If Length is short_length, Tag and short_length are packed in a 714 * single char, as illustrated below. 715 * <blockquote> 716 * char[0] = (Tag << 8) | short_length; 717 * </blockquote> 718 * 719 * If Length is long_length, Tag and 255 are packed in the first 720 * char and a 32-bit integer, as illustrated below. 721 * <blockquote> 722 * char[0] = (Tag << 8) | 255; 723 * char[1] = (char) (long_length >>> 16); 724 * char[2] = (char) (long_length & 0xffff); 725 * </blockquote> 726 * <p> 727 * If Tag is a pattern_char_index, its Length is the number of 728 * pattern characters. For example, if the given pattern is 729 * "yyyy", Tag is 1 and Length is 4, followed by no data. 730 * <p> 731 * If Tag is TAG_QUOTE_CHARS, its Length is the number of char's 732 * following the TagField. For example, if the given pattern is 733 * "'o''clock'", Length is 7 followed by a char sequence of 734 * <code>o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k</code>. 735 * <p> 736 * TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII 737 * character in place of Length. For example, if the given pattern 738 * is "'o'", the TaggedData entry is 739 * <code>((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o')</code>. 740 * 741 * @exception NullPointerException if the given pattern is null 742 * @exception IllegalArgumentException if the given pattern is invalid 743 */ 744 private char[] compile(String pattern) { 745 int length = pattern.length(); 746 boolean inQuote = false; 747 StringBuilder compiledCode = new StringBuilder(length * 2); 748 StringBuilder tmpBuffer = null; 749 int count = 0, tagcount = 0; 750 int lastTag = -1, prevTag = -1; 751 752 for (int i = 0; i < length; i++) { 753 char c = pattern.charAt(i); 754 755 if (c == '\'') { 756 // '' is treated as a single quote regardless of being 757 // in a quoted section. 758 if ((i + 1) < length) { 759 c = pattern.charAt(i + 1); 760 if (c == '\'') { 761 i++; 762 if (count != 0) { 763 encode(lastTag, count, compiledCode); 764 tagcount++; 765 prevTag = lastTag; 766 lastTag = -1; 767 count = 0; 768 } 769 if (inQuote) { 770 tmpBuffer.append(c); 771 } else { 772 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c)); 773 } 774 continue; 775 } 776 } 777 if (!inQuote) { 778 if (count != 0) { 779 encode(lastTag, count, compiledCode); 780 tagcount++; 781 prevTag = lastTag; 782 lastTag = -1; 783 count = 0; 784 } 785 if (tmpBuffer == null) { 786 tmpBuffer = new StringBuilder(length); 787 } else { 788 tmpBuffer.setLength(0); 789 } 790 inQuote = true; 791 } else { 792 int len = tmpBuffer.length(); 793 if (len == 1) { 794 char ch = tmpBuffer.charAt(0); 795 if (ch < 128) { 796 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | ch)); 797 } else { 798 compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | 1)); 799 compiledCode.append(ch); 800 } 801 } else { 802 encode(TAG_QUOTE_CHARS, len, compiledCode); 803 compiledCode.append(tmpBuffer); 804 } 805 inQuote = false; 806 } 807 continue; 808 } 809 if (inQuote) { 810 tmpBuffer.append(c); 811 continue; 812 } 813 if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')) { 814 if (count != 0) { 815 encode(lastTag, count, compiledCode); 816 tagcount++; 817 prevTag = lastTag; 818 lastTag = -1; 819 count = 0; 820 } 821 if (c < 128) { 822 // In most cases, c would be a delimiter, such as ':'. 823 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c)); 824 } else { 825 // Take any contiguous non-ASCII alphabet characters and 826 // put them in a single TAG_QUOTE_CHARS. 827 int j; 828 for (j = i + 1; j < length; j++) { 829 char d = pattern.charAt(j); 830 if (d == '\'' || (d >= 'a' && d <= 'z' || d >= 'A' && d <= 'Z')) { 831 break; 832 } 833 } 834 encode(TAG_QUOTE_CHARS, j - i, compiledCode); 835 for (; i < j; i++) { 836 compiledCode.append(pattern.charAt(i)); 837 } 838 i--; 839 } 840 continue; 841 } 842 843 int tag; 844 if ((tag = DateFormatSymbols.patternChars.indexOf(c)) == -1) { 845 throw new IllegalArgumentException("Illegal pattern character " + 846 "'" + c + "'"); 847 } 848 if (lastTag == -1 || lastTag == tag) { 849 lastTag = tag; 850 count++; 851 continue; 852 } 853 encode(lastTag, count, compiledCode); 854 tagcount++; 855 prevTag = lastTag; 856 lastTag = tag; 857 count = 1; 858 } 859 860 if (inQuote) { 861 throw new IllegalArgumentException("Unterminated quote"); 862 } 863 864 if (count != 0) { 865 encode(lastTag, count, compiledCode); 866 tagcount++; 867 prevTag = lastTag; 868 } 869 870 forceStandaloneForm = (tagcount == 1 && prevTag == PATTERN_MONTH); 871 872 // Copy the compiled pattern to a char array 873 int len = compiledCode.length(); 874 char[] r = new char[len]; 875 compiledCode.getChars(0, len, r, 0); 876 return r; 877 } 878 879 /** 880 * Encodes the given tag and length and puts encoded char(s) into buffer. 881 */ 882 private static void encode(int tag, int length, StringBuilder buffer) { 883 if (tag == PATTERN_ISO_ZONE && length >= 4) { 884 throw new IllegalArgumentException("invalid ISO 8601 format: length=" + length); 885 } 886 if (length < 255) { 887 buffer.append((char)(tag << 8 | length)); 888 } else { 889 buffer.append((char)((tag << 8) | 0xff)); 890 buffer.append((char)(length >>> 16)); 891 buffer.append((char)(length & 0xffff)); 892 } 893 } 894 895 /* Initialize the fields we use to disambiguate ambiguous years. Separate 896 * so we can call it from readObject(). 897 */ 898 private void initializeDefaultCentury() { 899 calendar.setTimeInMillis(System.currentTimeMillis()); 900 calendar.add( Calendar.YEAR, -80 ); 901 parseAmbiguousDatesAsAfter(calendar.getTime()); 902 } 903 904 /* Define one-century window into which to disambiguate dates using 905 * two-digit years. 906 */ 907 private void parseAmbiguousDatesAsAfter(Date startDate) { 908 defaultCenturyStart = startDate; 909 calendar.setTime(startDate); 910 defaultCenturyStartYear = calendar.get(Calendar.YEAR); 911 } 912 913 /** 914 * Sets the 100-year period 2-digit years will be interpreted as being in 915 * to begin on the date the user specifies. 916 * 917 * @param startDate During parsing, two digit years will be placed in the range 918 * <code>startDate</code> to <code>startDate + 100 years</code>. 919 * @see #get2DigitYearStart 920 * @throws NullPointerException if {@code startDate} is {@code null}. 921 * @since 1.2 922 */ 923 public void set2DigitYearStart(Date startDate) { 924 parseAmbiguousDatesAsAfter(new Date(startDate.getTime())); 925 } 926 927 /** 928 * Returns the beginning date of the 100-year period 2-digit years are interpreted 929 * as being within. 930 * 931 * @return the start of the 100-year period into which two digit years are 932 * parsed 933 * @see #set2DigitYearStart 934 * @since 1.2 935 */ 936 public Date get2DigitYearStart() { 937 return (Date) defaultCenturyStart.clone(); 938 } 939 940 /** 941 * Formats the given <code>Date</code> into a date/time string and appends 942 * the result to the given <code>StringBuffer</code>. 943 * 944 * @param date the date-time value to be formatted into a date-time string. 945 * @param toAppendTo where the new date-time text is to be appended. 946 * @param pos keeps track on the position of the field within 947 * the returned string. For example, given a date-time text 948 * {@code "1996.07.10 AD at 15:08:56 PDT"}, if the given {@code fieldPosition} 949 * is {@link DateFormat#YEAR_FIELD}, the begin index and end index of 950 * {@code fieldPosition} will be set to 0 and 4, respectively. 951 * Notice that if the same date-time field appears more than once in a 952 * pattern, the {@code fieldPosition} will be set for the first occurrence 953 * of that date-time field. For instance, formatting a {@code Date} to the 954 * date-time string {@code "1 PM PDT (Pacific Daylight Time)"} using the 955 * pattern {@code "h a z (zzzz)"} and the alignment field 956 * {@link DateFormat#TIMEZONE_FIELD}, the begin index and end index of 957 * {@code fieldPosition} will be set to 5 and 8, respectively, for the 958 * first occurrence of the timezone pattern character {@code 'z'}. 959 * @return the formatted date-time string. 960 * @exception NullPointerException if any of the parameters is {@code null}. 961 */ 962 @Override 963 public StringBuffer format(Date date, StringBuffer toAppendTo, 964 FieldPosition pos) 965 { 966 pos.beginIndex = pos.endIndex = 0; 967 return format(date, toAppendTo, pos.getFieldDelegate()); 968 } 969 970 // Called from Format after creating a FieldDelegate 971 private StringBuffer format(Date date, StringBuffer toAppendTo, 972 FieldDelegate delegate) { 973 // Convert input date to time field list 974 calendar.setTime(date); 975 976 boolean useDateFormatSymbols = useDateFormatSymbols(); 977 978 for (int i = 0; i < compiledPattern.length; ) { 979 int tag = compiledPattern[i] >>> 8; 980 int count = compiledPattern[i++] & 0xff; 981 if (count == 255) { 982 count = compiledPattern[i++] << 16; 983 count |= compiledPattern[i++]; 984 } 985 986 switch (tag) { 987 case TAG_QUOTE_ASCII_CHAR: 988 toAppendTo.append((char)count); 989 break; 990 991 case TAG_QUOTE_CHARS: 992 toAppendTo.append(compiledPattern, i, count); 993 i += count; 994 break; 995 996 default: 997 subFormat(tag, count, delegate, toAppendTo, useDateFormatSymbols); 998 break; 999 } 1000 } 1001 return toAppendTo; 1002 } 1003 1004 /** 1005 * Formats an Object producing an <code>AttributedCharacterIterator</code>. 1006 * You can use the returned <code>AttributedCharacterIterator</code> 1007 * to build the resulting String, as well as to determine information 1008 * about the resulting String. 1009 * <p> 1010 * Each attribute key of the AttributedCharacterIterator will be of type 1011 * <code>DateFormat.Field</code>, with the corresponding attribute value 1012 * being the same as the attribute key. 1013 * 1014 * @exception NullPointerException if obj is null. 1015 * @exception IllegalArgumentException if the Format cannot format the 1016 * given object, or if the Format's pattern string is invalid. 1017 * @param obj The object to format 1018 * @return AttributedCharacterIterator describing the formatted value. 1019 * @since 1.4 1020 */ 1021 @Override 1022 public AttributedCharacterIterator formatToCharacterIterator(Object obj) { 1023 StringBuffer sb = new StringBuffer(); 1024 CharacterIteratorFieldDelegate delegate = new 1025 CharacterIteratorFieldDelegate(); 1026 1027 if (obj instanceof Date) { 1028 format((Date)obj, sb, delegate); 1029 } 1030 else if (obj instanceof Number) { 1031 format(new Date(((Number)obj).longValue()), sb, delegate); 1032 } 1033 else if (obj == null) { 1034 throw new NullPointerException( 1035 "formatToCharacterIterator must be passed non-null object"); 1036 } 1037 else { 1038 throw new IllegalArgumentException( 1039 "Cannot format given Object as a Date"); 1040 } 1041 return delegate.getIterator(sb.toString()); 1042 } 1043 1044 // Map index into pattern character string to Calendar field number 1045 private static final int[] PATTERN_INDEX_TO_CALENDAR_FIELD = { 1046 Calendar.ERA, 1047 Calendar.YEAR, 1048 Calendar.MONTH, 1049 Calendar.DATE, 1050 Calendar.HOUR_OF_DAY, 1051 Calendar.HOUR_OF_DAY, 1052 Calendar.MINUTE, 1053 Calendar.SECOND, 1054 Calendar.MILLISECOND, 1055 Calendar.DAY_OF_WEEK, 1056 Calendar.DAY_OF_YEAR, 1057 Calendar.DAY_OF_WEEK_IN_MONTH, 1058 Calendar.WEEK_OF_YEAR, 1059 Calendar.WEEK_OF_MONTH, 1060 Calendar.AM_PM, 1061 Calendar.HOUR, 1062 Calendar.HOUR, 1063 Calendar.ZONE_OFFSET, 1064 Calendar.ZONE_OFFSET, 1065 CalendarBuilder.WEEK_YEAR, // Pseudo Calendar field 1066 CalendarBuilder.ISO_DAY_OF_WEEK, // Pseudo Calendar field 1067 Calendar.ZONE_OFFSET, 1068 Calendar.MONTH 1069 }; 1070 1071 // Map index into pattern character string to DateFormat field number 1072 private static final int[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD = { 1073 DateFormat.ERA_FIELD, 1074 DateFormat.YEAR_FIELD, 1075 DateFormat.MONTH_FIELD, 1076 DateFormat.DATE_FIELD, 1077 DateFormat.HOUR_OF_DAY1_FIELD, 1078 DateFormat.HOUR_OF_DAY0_FIELD, 1079 DateFormat.MINUTE_FIELD, 1080 DateFormat.SECOND_FIELD, 1081 DateFormat.MILLISECOND_FIELD, 1082 DateFormat.DAY_OF_WEEK_FIELD, 1083 DateFormat.DAY_OF_YEAR_FIELD, 1084 DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD, 1085 DateFormat.WEEK_OF_YEAR_FIELD, 1086 DateFormat.WEEK_OF_MONTH_FIELD, 1087 DateFormat.AM_PM_FIELD, 1088 DateFormat.HOUR1_FIELD, 1089 DateFormat.HOUR0_FIELD, 1090 DateFormat.TIMEZONE_FIELD, 1091 DateFormat.TIMEZONE_FIELD, 1092 DateFormat.YEAR_FIELD, 1093 DateFormat.DAY_OF_WEEK_FIELD, 1094 DateFormat.TIMEZONE_FIELD, 1095 DateFormat.MONTH_FIELD 1096 }; 1097 1098 // Maps from DecimalFormatSymbols index to Field constant 1099 private static final Field[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID = { 1100 Field.ERA, 1101 Field.YEAR, 1102 Field.MONTH, 1103 Field.DAY_OF_MONTH, 1104 Field.HOUR_OF_DAY1, 1105 Field.HOUR_OF_DAY0, 1106 Field.MINUTE, 1107 Field.SECOND, 1108 Field.MILLISECOND, 1109 Field.DAY_OF_WEEK, 1110 Field.DAY_OF_YEAR, 1111 Field.DAY_OF_WEEK_IN_MONTH, 1112 Field.WEEK_OF_YEAR, 1113 Field.WEEK_OF_MONTH, 1114 Field.AM_PM, 1115 Field.HOUR1, 1116 Field.HOUR0, 1117 Field.TIME_ZONE, 1118 Field.TIME_ZONE, 1119 Field.YEAR, 1120 Field.DAY_OF_WEEK, 1121 Field.TIME_ZONE, 1122 Field.MONTH 1123 }; 1124 1125 /** 1126 * Private member function that does the real date/time formatting. 1127 */ 1128 private void subFormat(int patternCharIndex, int count, 1129 FieldDelegate delegate, StringBuffer buffer, 1130 boolean useDateFormatSymbols) 1131 { 1132 int maxIntCount = Integer.MAX_VALUE; 1133 String current = null; 1134 int beginOffset = buffer.length(); 1135 1136 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1137 int value; 1138 if (field == CalendarBuilder.WEEK_YEAR) { 1139 if (calendar.isWeekDateSupported()) { 1140 value = calendar.getWeekYear(); 1141 } else { 1142 // use calendar year 'y' instead 1143 patternCharIndex = PATTERN_YEAR; 1144 field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1145 value = calendar.get(field); 1146 } 1147 } else if (field == CalendarBuilder.ISO_DAY_OF_WEEK) { 1148 value = CalendarBuilder.toISODayOfWeek(calendar.get(Calendar.DAY_OF_WEEK)); 1149 } else { 1150 value = calendar.get(field); 1151 } 1152 1153 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT; 1154 if (!useDateFormatSymbols && field < Calendar.ZONE_OFFSET 1155 && patternCharIndex != PATTERN_MONTH_STANDALONE) { 1156 current = calendar.getDisplayName(field, style, locale); 1157 } 1158 1159 // Note: zeroPaddingNumber() assumes that maxDigits is either 1160 // 2 or maxIntCount. If we make any changes to this, 1161 // zeroPaddingNumber() must be fixed. 1162 1163 switch (patternCharIndex) { 1164 case PATTERN_ERA: // 'G' 1165 if (useDateFormatSymbols) { 1166 String[] eras = formatData.getEras(); 1167 if (value < eras.length) { 1168 current = eras[value]; 1169 } 1170 } 1171 if (current == null) { 1172 current = ""; 1173 } 1174 break; 1175 1176 case PATTERN_WEEK_YEAR: // 'Y' 1177 case PATTERN_YEAR: // 'y' 1178 if (calendar instanceof GregorianCalendar) { 1179 if (count != 2) { 1180 zeroPaddingNumber(value, count, maxIntCount, buffer); 1181 } else { 1182 zeroPaddingNumber(value, 2, 2, buffer); 1183 } // clip 1996 to 96 1184 } else { 1185 if (current == null) { 1186 zeroPaddingNumber(value, style == Calendar.LONG ? 1 : count, 1187 maxIntCount, buffer); 1188 } 1189 } 1190 break; 1191 1192 case PATTERN_MONTH: // 'M' (context seinsive) 1193 if (useDateFormatSymbols) { 1194 String[] months; 1195 if (count >= 4) { 1196 months = formatData.getMonths(); 1197 current = months[value]; 1198 } else if (count == 3) { 1199 months = formatData.getShortMonths(); 1200 current = months[value]; 1201 } 1202 } else { 1203 if (count < 3) { 1204 current = null; 1205 } else if (forceStandaloneForm) { 1206 current = calendar.getDisplayName(field, style | 0x8000, locale); 1207 if (current == null) { 1208 current = calendar.getDisplayName(field, style, locale); 1209 } 1210 } 1211 } 1212 if (current == null) { 1213 zeroPaddingNumber(value+1, count, maxIntCount, buffer); 1214 } 1215 break; 1216 1217 case PATTERN_MONTH_STANDALONE: // 'L' 1218 assert current == null; 1219 if (locale == null) { 1220 String[] months; 1221 if (count >= 4) { 1222 months = formatData.getMonths(); 1223 current = months[value]; 1224 } else if (count == 3) { 1225 months = formatData.getShortMonths(); 1226 current = months[value]; 1227 } 1228 } else { 1229 if (count >= 3) { 1230 current = calendar.getDisplayName(field, style | 0x8000, locale); 1231 } 1232 } 1233 if (current == null) { 1234 zeroPaddingNumber(value+1, count, maxIntCount, buffer); 1235 } 1236 break; 1237 1238 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59 1239 if (current == null) { 1240 if (value == 0) { 1241 zeroPaddingNumber(calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1, 1242 count, maxIntCount, buffer); 1243 } else { 1244 zeroPaddingNumber(value, count, maxIntCount, buffer); 1245 } 1246 } 1247 break; 1248 1249 case PATTERN_DAY_OF_WEEK: // 'E' 1250 if (useDateFormatSymbols) { 1251 String[] weekdays; 1252 if (count >= 4) { 1253 weekdays = formatData.getWeekdays(); 1254 current = weekdays[value]; 1255 } else { // count < 4, use abbreviated form if exists 1256 weekdays = formatData.getShortWeekdays(); 1257 current = weekdays[value]; 1258 } 1259 } 1260 break; 1261 1262 case PATTERN_AM_PM: // 'a' 1263 if (useDateFormatSymbols) { 1264 String[] ampm = formatData.getAmPmStrings(); 1265 current = ampm[value]; 1266 } 1267 break; 1268 1269 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM 1270 if (current == null) { 1271 if (value == 0) { 1272 zeroPaddingNumber(calendar.getLeastMaximum(Calendar.HOUR) + 1, 1273 count, maxIntCount, buffer); 1274 } else { 1275 zeroPaddingNumber(value, count, maxIntCount, buffer); 1276 } 1277 } 1278 break; 1279 1280 case PATTERN_ZONE_NAME: // 'z' 1281 if (current == null) { 1282 if (formatData.locale == null || formatData.isZoneStringsSet) { 1283 int zoneIndex = 1284 formatData.getZoneIndex(calendar.getTimeZone().getID()); 1285 if (zoneIndex == -1) { 1286 value = calendar.get(Calendar.ZONE_OFFSET) + 1287 calendar.get(Calendar.DST_OFFSET); 1288 buffer.append(ZoneInfoFile.toCustomID(value)); 1289 } else { 1290 int index = (calendar.get(Calendar.DST_OFFSET) == 0) ? 1: 3; 1291 if (count < 4) { 1292 // Use the short name 1293 index++; 1294 } 1295 String[][] zoneStrings = formatData.getZoneStringsWrapper(); 1296 buffer.append(zoneStrings[zoneIndex][index]); 1297 } 1298 } else { 1299 TimeZone tz = calendar.getTimeZone(); 1300 boolean daylight = (calendar.get(Calendar.DST_OFFSET) != 0); 1301 int tzstyle = (count < 4 ? TimeZone.SHORT : TimeZone.LONG); 1302 buffer.append(tz.getDisplayName(daylight, tzstyle, formatData.locale)); 1303 } 1304 } 1305 break; 1306 1307 case PATTERN_ZONE_VALUE: // 'Z' ("-/+hhmm" form) 1308 value = (calendar.get(Calendar.ZONE_OFFSET) + 1309 calendar.get(Calendar.DST_OFFSET)) / 60000; 1310 1311 int width = 4; 1312 if (value >= 0) { 1313 buffer.append('+'); 1314 } else { 1315 width++; 1316 } 1317 1318 int num = (value / 60) * 100 + (value % 60); 1319 CalendarUtils.sprintf0d(buffer, num, width); 1320 break; 1321 1322 case PATTERN_ISO_ZONE: // 'X' 1323 value = calendar.get(Calendar.ZONE_OFFSET) 1324 + calendar.get(Calendar.DST_OFFSET); 1325 1326 if (value == 0) { 1327 buffer.append('Z'); 1328 break; 1329 } 1330 1331 value /= 60000; 1332 if (value >= 0) { 1333 buffer.append('+'); 1334 } else { 1335 buffer.append('-'); 1336 value = -value; 1337 } 1338 1339 CalendarUtils.sprintf0d(buffer, value / 60, 2); 1340 if (count == 1) { 1341 break; 1342 } 1343 1344 if (count == 3) { 1345 buffer.append(':'); 1346 } 1347 CalendarUtils.sprintf0d(buffer, value % 60, 2); 1348 break; 1349 1350 default: 1351 // case PATTERN_DAY_OF_MONTH: // 'd' 1352 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59 1353 // case PATTERN_MINUTE: // 'm' 1354 // case PATTERN_SECOND: // 's' 1355 // case PATTERN_MILLISECOND: // 'S' 1356 // case PATTERN_DAY_OF_YEAR: // 'D' 1357 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F' 1358 // case PATTERN_WEEK_OF_YEAR: // 'w' 1359 // case PATTERN_WEEK_OF_MONTH: // 'W' 1360 // case PATTERN_HOUR0: // 'K' eg, 11PM + 1 hour =>> 0 AM 1361 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' pseudo field, Monday = 1, ..., Sunday = 7 1362 if (current == null) { 1363 zeroPaddingNumber(value, count, maxIntCount, buffer); 1364 } 1365 break; 1366 } // switch (patternCharIndex) 1367 1368 if (current != null) { 1369 buffer.append(current); 1370 } 1371 1372 int fieldID = PATTERN_INDEX_TO_DATE_FORMAT_FIELD[patternCharIndex]; 1373 Field f = PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID[patternCharIndex]; 1374 1375 delegate.formatted(fieldID, f, f, beginOffset, buffer.length(), buffer); 1376 } 1377 1378 /** 1379 * Formats a number with the specified minimum and maximum number of digits. 1380 */ 1381 private void zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer) 1382 { 1383 // Optimization for 1, 2 and 4 digit numbers. This should 1384 // cover most cases of formatting date/time related items. 1385 // Note: This optimization code assumes that maxDigits is 1386 // either 2 or Integer.MAX_VALUE (maxIntCount in format()). 1387 try { 1388 if (zeroDigit == 0) { 1389 zeroDigit = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getZeroDigit(); 1390 } 1391 if (value >= 0) { 1392 if (value < 100 && minDigits >= 1 && minDigits <= 2) { 1393 if (value < 10) { 1394 if (minDigits == 2) { 1395 buffer.append(zeroDigit); 1396 } 1397 buffer.append((char)(zeroDigit + value)); 1398 } else { 1399 buffer.append((char)(zeroDigit + value / 10)); 1400 buffer.append((char)(zeroDigit + value % 10)); 1401 } 1402 return; 1403 } else if (value >= 1000 && value < 10000) { 1404 if (minDigits == 4) { 1405 buffer.append((char)(zeroDigit + value / 1000)); 1406 value %= 1000; 1407 buffer.append((char)(zeroDigit + value / 100)); 1408 value %= 100; 1409 buffer.append((char)(zeroDigit + value / 10)); 1410 buffer.append((char)(zeroDigit + value % 10)); 1411 return; 1412 } 1413 if (minDigits == 2 && maxDigits == 2) { 1414 zeroPaddingNumber(value % 100, 2, 2, buffer); 1415 return; 1416 } 1417 } 1418 } 1419 } catch (Exception e) { 1420 } 1421 1422 numberFormat.setMinimumIntegerDigits(minDigits); 1423 numberFormat.setMaximumIntegerDigits(maxDigits); 1424 numberFormat.format((long)value, buffer, DontCareFieldPosition.INSTANCE); 1425 } 1426 1427 1428 /** 1429 * Parses text from a string to produce a <code>Date</code>. 1430 * <p> 1431 * The method attempts to parse text starting at the index given by 1432 * <code>pos</code>. 1433 * If parsing succeeds, then the index of <code>pos</code> is updated 1434 * to the index after the last character used (parsing does not necessarily 1435 * use all characters up to the end of the string), and the parsed 1436 * date is returned. The updated <code>pos</code> can be used to 1437 * indicate the starting point for the next call to this method. 1438 * If an error occurs, then the index of <code>pos</code> is not 1439 * changed, the error index of <code>pos</code> is set to the index of 1440 * the character where the error occurred, and null is returned. 1441 * 1442 * <p>This parsing operation uses the {@link DateFormat#calendar 1443 * calendar} to produce a {@code Date}. All of the {@code 1444 * calendar}'s date-time fields are {@linkplain Calendar#clear() 1445 * cleared} before parsing, and the {@code calendar}'s default 1446 * values of the date-time fields are used for any missing 1447 * date-time information. For example, the year value of the 1448 * parsed {@code Date} is 1970 with {@link GregorianCalendar} if 1449 * no year value is given from the parsing operation. The {@code 1450 * TimeZone} value may be overwritten, depending on the given 1451 * pattern and the time zone value in {@code text}. Any {@code 1452 * TimeZone} value that has previously been set by a call to 1453 * {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need 1454 * to be restored for further operations. 1455 * 1456 * @param text A <code>String</code>, part of which should be parsed. 1457 * @param pos A <code>ParsePosition</code> object with index and error 1458 * index information as described above. 1459 * @return A <code>Date</code> parsed from the string. In case of 1460 * error, returns null. 1461 * @exception NullPointerException if <code>text</code> or <code>pos</code> is null. 1462 */ 1463 @Override 1464 public Date parse(String text, ParsePosition pos) 1465 { 1466 checkNegativeNumberExpression(); 1467 1468 int start = pos.index; 1469 int oldStart = start; 1470 int textLength = text.length(); 1471 1472 boolean[] ambiguousYear = {false}; 1473 1474 CalendarBuilder calb = new CalendarBuilder(); 1475 1476 for (int i = 0; i < compiledPattern.length; ) { 1477 int tag = compiledPattern[i] >>> 8; 1478 int count = compiledPattern[i++] & 0xff; 1479 if (count == 255) { 1480 count = compiledPattern[i++] << 16; 1481 count |= compiledPattern[i++]; 1482 } 1483 1484 switch (tag) { 1485 case TAG_QUOTE_ASCII_CHAR: 1486 if (start >= textLength || text.charAt(start) != (char)count) { 1487 pos.index = oldStart; 1488 pos.errorIndex = start; 1489 return null; 1490 } 1491 start++; 1492 break; 1493 1494 case TAG_QUOTE_CHARS: 1495 while (count-- > 0) { 1496 if (start >= textLength || text.charAt(start) != compiledPattern[i++]) { 1497 pos.index = oldStart; 1498 pos.errorIndex = start; 1499 return null; 1500 } 1501 start++; 1502 } 1503 break; 1504 1505 default: 1506 // Peek the next pattern to determine if we need to 1507 // obey the number of pattern letters for 1508 // parsing. It's required when parsing contiguous 1509 // digit text (e.g., "20010704") with a pattern which 1510 // has no delimiters between fields, like "yyyyMMdd". 1511 boolean obeyCount = false; 1512 1513 // In Arabic, a minus sign for a negative number is put after 1514 // the number. Even in another locale, a minus sign can be 1515 // put after a number using DateFormat.setNumberFormat(). 1516 // If both the minus sign and the field-delimiter are '-', 1517 // subParse() needs to determine whether a '-' after a number 1518 // in the given text is a delimiter or is a minus sign for the 1519 // preceding number. We give subParse() a clue based on the 1520 // information in compiledPattern. 1521 boolean useFollowingMinusSignAsDelimiter = false; 1522 1523 if (i < compiledPattern.length) { 1524 int nextTag = compiledPattern[i] >>> 8; 1525 int nextCount = compiledPattern[i] & 0xff; 1526 obeyCount = shouldObeyCount(nextTag, nextCount); 1527 1528 if (hasFollowingMinusSign && 1529 (nextTag == TAG_QUOTE_ASCII_CHAR || 1530 nextTag == TAG_QUOTE_CHARS)) { 1531 1532 if (nextTag != TAG_QUOTE_ASCII_CHAR) { 1533 nextCount = compiledPattern[i+1]; 1534 } 1535 1536 if (nextCount == minusSign) { 1537 useFollowingMinusSignAsDelimiter = true; 1538 } 1539 } 1540 } 1541 start = subParse(text, start, tag, count, obeyCount, 1542 ambiguousYear, pos, 1543 useFollowingMinusSignAsDelimiter, calb); 1544 if (start < 0) { 1545 pos.index = oldStart; 1546 return null; 1547 } 1548 } 1549 } 1550 1551 // At this point the fields of Calendar have been set. Calendar 1552 // will fill in default values for missing fields when the time 1553 // is computed. 1554 1555 pos.index = start; 1556 1557 Date parsedDate; 1558 try { 1559 parsedDate = calb.establish(calendar).getTime(); 1560 // If the year value is ambiguous, 1561 // then the two-digit year == the default start year 1562 if (ambiguousYear[0]) { 1563 if (parsedDate.before(defaultCenturyStart)) { 1564 parsedDate = calb.addYear(100).establish(calendar).getTime(); 1565 } 1566 } 1567 } 1568 // An IllegalArgumentException will be thrown by Calendar.getTime() 1569 // if any fields are out of range, e.g., MONTH == 17. 1570 catch (IllegalArgumentException e) { 1571 pos.errorIndex = start; 1572 pos.index = oldStart; 1573 return null; 1574 } 1575 1576 return parsedDate; 1577 } 1578 1579 /* If the next tag/pattern is a <Numeric_Field> then the parser 1580 * should consider the count of digits while parsing the contigous digits 1581 * for the current tag/pattern 1582 */ 1583 private boolean shouldObeyCount(int tag, int count) { 1584 switch (tag) { 1585 case PATTERN_MONTH: 1586 case PATTERN_MONTH_STANDALONE: 1587 return count <= 2; 1588 case PATTERN_YEAR: 1589 case PATTERN_DAY_OF_MONTH: 1590 case PATTERN_HOUR_OF_DAY1: 1591 case PATTERN_HOUR_OF_DAY0: 1592 case PATTERN_MINUTE: 1593 case PATTERN_SECOND: 1594 case PATTERN_MILLISECOND: 1595 case PATTERN_DAY_OF_YEAR: 1596 case PATTERN_DAY_OF_WEEK_IN_MONTH: 1597 case PATTERN_WEEK_OF_YEAR: 1598 case PATTERN_WEEK_OF_MONTH: 1599 case PATTERN_HOUR1: 1600 case PATTERN_HOUR0: 1601 case PATTERN_WEEK_YEAR: 1602 case PATTERN_ISO_DAY_OF_WEEK: 1603 return true; 1604 default: 1605 return false; 1606 } 1607 } 1608 1609 /** 1610 * Private code-size reduction function used by subParse. 1611 * @param text the time text being parsed. 1612 * @param start where to start parsing. 1613 * @param field the date field being parsed. 1614 * @param data the string array to parsed. 1615 * @return the new start position if matching succeeded; a negative number 1616 * indicating matching failure, otherwise. 1617 */ 1618 private int matchString(String text, int start, int field, String[] data, CalendarBuilder calb) 1619 { 1620 int i = 0; 1621 int count = data.length; 1622 1623 if (field == Calendar.DAY_OF_WEEK) { 1624 i = 1; 1625 } 1626 1627 // There may be multiple strings in the data[] array which begin with 1628 // the same prefix (e.g., Cerven and Cervenec (June and July) in Czech). 1629 // We keep track of the longest match, and return that. Note that this 1630 // unfortunately requires us to test all array elements. 1631 int bestMatchLength = 0, bestMatch = -1; 1632 for (; i<count; ++i) 1633 { 1634 int length = data[i].length(); 1635 // Always compare if we have no match yet; otherwise only compare 1636 // against potentially better matches (longer strings). 1637 if (length > bestMatchLength && 1638 text.regionMatches(true, start, data[i], 0, length)) 1639 { 1640 bestMatch = i; 1641 bestMatchLength = length; 1642 } 1643 } 1644 if (bestMatch >= 0) 1645 { 1646 calb.set(field, bestMatch); 1647 return start + bestMatchLength; 1648 } 1649 return -start; 1650 } 1651 1652 /** 1653 * Performs the same thing as matchString(String, int, int, 1654 * String[]). This method takes a Map<String, Integer> instead of 1655 * String[]. 1656 */ 1657 private int matchString(String text, int start, int field, 1658 Map<String,Integer> data, CalendarBuilder calb) { 1659 if (data != null) { 1660 // TODO: make this default when it's in the spec. 1661 if (data instanceof SortedMap) { 1662 for (String name : data.keySet()) { 1663 if (text.regionMatches(true, start, name, 0, name.length())) { 1664 calb.set(field, data.get(name)); 1665 return start + name.length(); 1666 } 1667 } 1668 return -start; 1669 } 1670 1671 String bestMatch = null; 1672 1673 for (String name : data.keySet()) { 1674 int length = name.length(); 1675 if (bestMatch == null || length > bestMatch.length()) { 1676 if (text.regionMatches(true, start, name, 0, length)) { 1677 bestMatch = name; 1678 } 1679 } 1680 } 1681 1682 if (bestMatch != null) { 1683 calb.set(field, data.get(bestMatch)); 1684 return start + bestMatch.length(); 1685 } 1686 } 1687 return -start; 1688 } 1689 1690 private int matchZoneString(String text, int start, String[] zoneNames) { 1691 for (int i = 1; i <= 4; ++i) { 1692 // Checking long and short zones [1 & 2], 1693 // and long and short daylight [3 & 4]. 1694 String zoneName = zoneNames[i]; 1695 if (zoneName.isEmpty()) { 1696 // fill in by retrieving single name 1697 zoneName = TimeZoneNameUtility.retrieveDisplayName( 1698 zoneNames[0], i >= 3, i % 2, locale); 1699 zoneNames[i] = zoneName; 1700 } 1701 if (text.regionMatches(true, start, 1702 zoneName, 0, zoneName.length())) { 1703 return i; 1704 } 1705 } 1706 return -1; 1707 } 1708 1709 private boolean matchDSTString(String text, int start, int zoneIndex, int standardIndex, 1710 String[][] zoneStrings) { 1711 int index = standardIndex + 2; 1712 String zoneName = zoneStrings[zoneIndex][index]; 1713 if (text.regionMatches(true, start, 1714 zoneName, 0, zoneName.length())) { 1715 return true; 1716 } 1717 return false; 1718 } 1719 1720 /** 1721 * find time zone 'text' matched zoneStrings and set to internal 1722 * calendar. 1723 */ 1724 private int subParseZoneString(String text, int start, CalendarBuilder calb) { 1725 boolean useSameName = false; // true if standard and daylight time use the same abbreviation. 1726 TimeZone currentTimeZone = getTimeZone(); 1727 1728 // At this point, check for named time zones by looking through 1729 // the locale data from the TimeZoneNames strings. 1730 // Want to be able to parse both short and long forms. 1731 int zoneIndex = formatData.getZoneIndex(currentTimeZone.getID()); 1732 TimeZone tz = null; 1733 String[][] zoneStrings = formatData.getZoneStringsWrapper(); 1734 String[] zoneNames = null; 1735 int nameIndex = 0; 1736 if (zoneIndex != -1) { 1737 zoneNames = zoneStrings[zoneIndex]; 1738 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1739 if (nameIndex <= 2) { 1740 // Check if the standard name (abbr) and the daylight name are the same. 1741 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1742 } 1743 tz = TimeZone.getTimeZone(zoneNames[0]); 1744 } 1745 } 1746 if (tz == null) { 1747 zoneIndex = formatData.getZoneIndex(TimeZone.getDefault().getID()); 1748 if (zoneIndex != -1) { 1749 zoneNames = zoneStrings[zoneIndex]; 1750 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1751 if (nameIndex <= 2) { 1752 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1753 } 1754 tz = TimeZone.getTimeZone(zoneNames[0]); 1755 } 1756 } 1757 } 1758 1759 if (tz == null) { 1760 int len = zoneStrings.length; 1761 for (int i = 0; i < len; i++) { 1762 zoneNames = zoneStrings[i]; 1763 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1764 if (nameIndex <= 2) { 1765 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1766 } 1767 tz = TimeZone.getTimeZone(zoneNames[0]); 1768 break; 1769 } 1770 } 1771 } 1772 if (tz != null) { // Matched any ? 1773 if (!tz.equals(currentTimeZone)) { 1774 setTimeZone(tz); 1775 } 1776 // If the time zone matched uses the same name 1777 // (abbreviation) for both standard and daylight time, 1778 // let the time zone in the Calendar decide which one. 1779 // 1780 // Also if tz.getDSTSaving() returns 0 for DST, use tz to 1781 // determine the local time. (6645292) 1782 int dstAmount = (nameIndex >= 3) ? tz.getDSTSavings() : 0; 1783 if (!(useSameName || (nameIndex >= 3 && dstAmount == 0))) { 1784 calb.clear(Calendar.ZONE_OFFSET).set(Calendar.DST_OFFSET, dstAmount); 1785 } 1786 return (start + zoneNames[nameIndex].length()); 1787 } 1788 return -start; 1789 } 1790 1791 /** 1792 * Parses numeric forms of time zone offset, such as "hh:mm", and 1793 * sets calb to the parsed value. 1794 * 1795 * @param text the text to be parsed 1796 * @param start the character position to start parsing 1797 * @param sign 1: positive; -1: negative 1798 * @param count 0: 'Z' or "GMT+hh:mm" parsing; 1 - 3: the number of 'X's 1799 * @param colon true - colon required between hh and mm; false - no colon required 1800 * @param calb a CalendarBuilder in which the parsed value is stored 1801 * @return updated parsed position, or its negative value to indicate a parsing error 1802 */ 1803 private int subParseNumericZone(String text, int start, int sign, int count, 1804 boolean colon, CalendarBuilder calb) { 1805 int index = start; 1806 1807 parse: 1808 try { 1809 char c = text.charAt(index++); 1810 // Parse hh 1811 int hours; 1812 if (!isDigit(c)) { 1813 break parse; 1814 } 1815 hours = c - '0'; 1816 c = text.charAt(index++); 1817 if (isDigit(c)) { 1818 hours = hours * 10 + (c - '0'); 1819 } else { 1820 // If no colon in RFC 822 or 'X' (ISO), two digits are 1821 // required. 1822 if (count > 0 || !colon) { 1823 break parse; 1824 } 1825 --index; 1826 } 1827 if (hours > 23) { 1828 break parse; 1829 } 1830 int minutes = 0; 1831 if (count != 1) { 1832 // Proceed with parsing mm 1833 c = text.charAt(index++); 1834 if (colon) { 1835 if (c != ':') { 1836 break parse; 1837 } 1838 c = text.charAt(index++); 1839 } 1840 if (!isDigit(c)) { 1841 break parse; 1842 } 1843 minutes = c - '0'; 1844 c = text.charAt(index++); 1845 if (!isDigit(c)) { 1846 break parse; 1847 } 1848 minutes = minutes * 10 + (c - '0'); 1849 if (minutes > 59) { 1850 break parse; 1851 } 1852 } 1853 minutes += hours * 60; 1854 calb.set(Calendar.ZONE_OFFSET, minutes * MILLIS_PER_MINUTE * sign) 1855 .set(Calendar.DST_OFFSET, 0); 1856 return index; 1857 } catch (IndexOutOfBoundsException e) { 1858 } 1859 return 1 - index; // -(index - 1) 1860 } 1861 1862 private boolean isDigit(char c) { 1863 return c >= '0' && c <= '9'; 1864 } 1865 1866 /** 1867 * Private member function that converts the parsed date strings into 1868 * timeFields. Returns -start (for ParsePosition) if failed. 1869 * @param text the time text to be parsed. 1870 * @param start where to start parsing. 1871 * @param patternCharIndex the index of the pattern character. 1872 * @param count the count of a pattern character. 1873 * @param obeyCount if true, then the next field directly abuts this one, 1874 * and we should use the count to know when to stop parsing. 1875 * @param ambiguousYear return parameter; upon return, if ambiguousYear[0] 1876 * is true, then a two-digit year was parsed and may need to be readjusted. 1877 * @param origPos origPos.errorIndex is used to return an error index 1878 * at which a parse error occurred, if matching failure occurs. 1879 * @return the new start position if matching succeeded; -1 indicating 1880 * matching failure, otherwise. In case matching failure occurred, 1881 * an error index is set to origPos.errorIndex. 1882 */ 1883 private int subParse(String text, int start, int patternCharIndex, int count, 1884 boolean obeyCount, boolean[] ambiguousYear, 1885 ParsePosition origPos, 1886 boolean useFollowingMinusSignAsDelimiter, CalendarBuilder calb) { 1887 Number number; 1888 int value = 0; 1889 ParsePosition pos = new ParsePosition(0); 1890 pos.index = start; 1891 if (patternCharIndex == PATTERN_WEEK_YEAR && !calendar.isWeekDateSupported()) { 1892 // use calendar year 'y' instead 1893 patternCharIndex = PATTERN_YEAR; 1894 } 1895 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1896 1897 // If there are any spaces here, skip over them. If we hit the end 1898 // of the string, then fail. 1899 for (;;) { 1900 if (pos.index >= text.length()) { 1901 origPos.errorIndex = start; 1902 return -1; 1903 } 1904 char c = text.charAt(pos.index); 1905 if (c != ' ' && c != '\t') { 1906 break; 1907 } 1908 ++pos.index; 1909 } 1910 // Remember the actual start index 1911 int actualStart = pos.index; 1912 1913 parsing: 1914 { 1915 // We handle a few special cases here where we need to parse 1916 // a number value. We handle further, more generic cases below. We need 1917 // to handle some of them here because some fields require extra processing on 1918 // the parsed value. 1919 if (patternCharIndex == PATTERN_HOUR_OF_DAY1 || 1920 patternCharIndex == PATTERN_HOUR1 || 1921 (patternCharIndex == PATTERN_MONTH && count <= 2) || 1922 (patternCharIndex == PATTERN_MONTH_STANDALONE && count <= 2) || 1923 patternCharIndex == PATTERN_YEAR || 1924 patternCharIndex == PATTERN_WEEK_YEAR) { 1925 // It would be good to unify this with the obeyCount logic below, 1926 // but that's going to be difficult. 1927 if (obeyCount) { 1928 if ((start+count) > text.length()) { 1929 break parsing; 1930 } 1931 number = numberFormat.parse(text.substring(0, start+count), pos); 1932 } else { 1933 number = numberFormat.parse(text, pos); 1934 } 1935 if (number == null) { 1936 if (patternCharIndex != PATTERN_YEAR || calendar instanceof GregorianCalendar) { 1937 break parsing; 1938 } 1939 } else { 1940 value = number.intValue(); 1941 1942 if (useFollowingMinusSignAsDelimiter && (value < 0) && 1943 (((pos.index < text.length()) && 1944 (text.charAt(pos.index) != minusSign)) || 1945 ((pos.index == text.length()) && 1946 (text.charAt(pos.index-1) == minusSign)))) { 1947 value = -value; 1948 pos.index--; 1949 } 1950 } 1951 } 1952 1953 boolean useDateFormatSymbols = useDateFormatSymbols(); 1954 1955 int index; 1956 switch (patternCharIndex) { 1957 case PATTERN_ERA: // 'G' 1958 if (useDateFormatSymbols) { 1959 if ((index = matchString(text, start, Calendar.ERA, formatData.getEras(), calb)) > 0) { 1960 return index; 1961 } 1962 } else { 1963 Map<String, Integer> map = getDisplayNamesMap(field, locale); 1964 if ((index = matchString(text, start, field, map, calb)) > 0) { 1965 return index; 1966 } 1967 } 1968 break parsing; 1969 1970 case PATTERN_WEEK_YEAR: // 'Y' 1971 case PATTERN_YEAR: // 'y' 1972 if (!(calendar instanceof GregorianCalendar)) { 1973 // calendar might have text representations for year values, 1974 // such as "\u5143" in JapaneseImperialCalendar. 1975 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT; 1976 Map<String, Integer> map = calendar.getDisplayNames(field, style, locale); 1977 if (map != null) { 1978 if ((index = matchString(text, start, field, map, calb)) > 0) { 1979 return index; 1980 } 1981 } 1982 calb.set(field, value); 1983 return pos.index; 1984 } 1985 1986 // If there are 3 or more YEAR pattern characters, this indicates 1987 // that the year value is to be treated literally, without any 1988 // two-digit year adjustments (e.g., from "01" to 2001). Otherwise 1989 // we made adjustments to place the 2-digit year in the proper 1990 // century, for parsed strings from "00" to "99". Any other string 1991 // is treated literally: "2250", "-1", "1", "002". 1992 if (count <= 2 && (pos.index - actualStart) == 2 1993 && Character.isDigit(text.charAt(actualStart)) 1994 && Character.isDigit(text.charAt(actualStart + 1))) { 1995 // Assume for example that the defaultCenturyStart is 6/18/1903. 1996 // This means that two-digit years will be forced into the range 1997 // 6/18/1903 to 6/17/2003. As a result, years 00, 01, and 02 1998 // correspond to 2000, 2001, and 2002. Years 04, 05, etc. correspond 1999 // to 1904, 1905, etc. If the year is 03, then it is 2003 if the 2000 // other fields specify a date before 6/18, or 1903 if they specify a 2001 // date afterwards. As a result, 03 is an ambiguous year. All other 2002 // two-digit years are unambiguous. 2003 int ambiguousTwoDigitYear = defaultCenturyStartYear % 100; 2004 ambiguousYear[0] = value == ambiguousTwoDigitYear; 2005 value += (defaultCenturyStartYear/100)*100 + 2006 (value < ambiguousTwoDigitYear ? 100 : 0); 2007 } 2008 calb.set(field, value); 2009 return pos.index; 2010 2011 case PATTERN_MONTH: // 'M' 2012 if (count <= 2) // i.e., M or MM. 2013 { 2014 // Don't want to parse the month if it is a string 2015 // while pattern uses numeric style: M or MM. 2016 // [We computed 'value' above.] 2017 calb.set(Calendar.MONTH, value - 1); 2018 return pos.index; 2019 } 2020 2021 if (useDateFormatSymbols) { 2022 // count >= 3 // i.e., MMM or MMMM 2023 // Want to be able to parse both short and long forms. 2024 // Try count == 4 first: 2025 int newStart; 2026 if ((newStart = matchString(text, start, Calendar.MONTH, 2027 formatData.getMonths(), calb)) > 0) { 2028 return newStart; 2029 } 2030 // count == 4 failed, now try count == 3 2031 if ((index = matchString(text, start, Calendar.MONTH, 2032 formatData.getShortMonths(), calb)) > 0) { 2033 return index; 2034 } 2035 } else { 2036 Map<String, Integer> map = getDisplayNamesMap(field, locale); 2037 if ((index = matchString(text, start, field, map, calb)) > 0) { 2038 return index; 2039 } 2040 } 2041 break parsing; 2042 2043 case PATTERN_MONTH_STANDALONE: // 'L' 2044 if (count <= 2) { 2045 // Don't want to parse the month if it is a string 2046 // while pattern uses numeric style: L or LL 2047 //[we computed 'value' above.] 2048 calb.set(Calendar.MONTH, value - 1); 2049 return pos.index; 2050 } 2051 Map<String, Integer> maps = getDisplayNamesMap(field, locale); 2052 if ((index = matchString(text, start, field, maps, calb)) > 0) { 2053 return index; 2054 } 2055 break parsing; 2056 2057 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59 2058 if (!isLenient()) { 2059 // Validate the hour value in non-lenient 2060 if (value < 1 || value > 24) { 2061 break parsing; 2062 } 2063 } 2064 // [We computed 'value' above.] 2065 if (value == calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1) { 2066 value = 0; 2067 } 2068 calb.set(Calendar.HOUR_OF_DAY, value); 2069 return pos.index; 2070 2071 case PATTERN_DAY_OF_WEEK: // 'E' 2072 { 2073 if (useDateFormatSymbols) { 2074 // Want to be able to parse both short and long forms. 2075 // Try count == 4 (DDDD) first: 2076 int newStart; 2077 if ((newStart=matchString(text, start, Calendar.DAY_OF_WEEK, 2078 formatData.getWeekdays(), calb)) > 0) { 2079 return newStart; 2080 } 2081 // DDDD failed, now try DDD 2082 if ((index = matchString(text, start, Calendar.DAY_OF_WEEK, 2083 formatData.getShortWeekdays(), calb)) > 0) { 2084 return index; 2085 } 2086 } else { 2087 int[] styles = { Calendar.LONG, Calendar.SHORT }; 2088 for (int style : styles) { 2089 Map<String,Integer> map = calendar.getDisplayNames(field, style, locale); 2090 if ((index = matchString(text, start, field, map, calb)) > 0) { 2091 return index; 2092 } 2093 } 2094 } 2095 } 2096 break parsing; 2097 2098 case PATTERN_AM_PM: // 'a' 2099 if (useDateFormatSymbols) { 2100 if ((index = matchString(text, start, Calendar.AM_PM, 2101 formatData.getAmPmStrings(), calb)) > 0) { 2102 return index; 2103 } 2104 } else { 2105 Map<String,Integer> map = getDisplayNamesMap(field, locale); 2106 if ((index = matchString(text, start, field, map, calb)) > 0) { 2107 return index; 2108 } 2109 } 2110 break parsing; 2111 2112 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM 2113 if (!isLenient()) { 2114 // Validate the hour value in non-lenient 2115 if (value < 1 || value > 12) { 2116 break parsing; 2117 } 2118 } 2119 // [We computed 'value' above.] 2120 if (value == calendar.getLeastMaximum(Calendar.HOUR) + 1) { 2121 value = 0; 2122 } 2123 calb.set(Calendar.HOUR, value); 2124 return pos.index; 2125 2126 case PATTERN_ZONE_NAME: // 'z' 2127 case PATTERN_ZONE_VALUE: // 'Z' 2128 { 2129 int sign = 0; 2130 try { 2131 char c = text.charAt(pos.index); 2132 if (c == '+') { 2133 sign = 1; 2134 } else if (c == '-') { 2135 sign = -1; 2136 } 2137 if (sign == 0) { 2138 // Try parsing a custom time zone "GMT+hh:mm" or "GMT". 2139 if ((c == 'G' || c == 'g') 2140 && (text.length() - start) >= GMT.length() 2141 && text.regionMatches(true, start, GMT, 0, GMT.length())) { 2142 pos.index = start + GMT.length(); 2143 2144 if ((text.length() - pos.index) > 0) { 2145 c = text.charAt(pos.index); 2146 if (c == '+') { 2147 sign = 1; 2148 } else if (c == '-') { 2149 sign = -1; 2150 } 2151 } 2152 2153 if (sign == 0) { /* "GMT" without offset */ 2154 calb.set(Calendar.ZONE_OFFSET, 0) 2155 .set(Calendar.DST_OFFSET, 0); 2156 return pos.index; 2157 } 2158 2159 // Parse the rest as "hh:mm" 2160 int i = subParseNumericZone(text, ++pos.index, 2161 sign, 0, true, calb); 2162 if (i > 0) { 2163 return i; 2164 } 2165 pos.index = -i; 2166 } else { 2167 // Try parsing the text as a time zone 2168 // name or abbreviation. 2169 int i = subParseZoneString(text, pos.index, calb); 2170 if (i > 0) { 2171 return i; 2172 } 2173 pos.index = -i; 2174 } 2175 } else { 2176 // Parse the rest as "hhmm" (RFC 822) 2177 int i = subParseNumericZone(text, ++pos.index, 2178 sign, 0, false, calb); 2179 if (i > 0) { 2180 return i; 2181 } 2182 pos.index = -i; 2183 } 2184 } catch (IndexOutOfBoundsException e) { 2185 } 2186 } 2187 break parsing; 2188 2189 case PATTERN_ISO_ZONE: // 'X' 2190 { 2191 if ((text.length() - pos.index) <= 0) { 2192 break parsing; 2193 } 2194 2195 int sign; 2196 char c = text.charAt(pos.index); 2197 if (c == 'Z') { 2198 calb.set(Calendar.ZONE_OFFSET, 0).set(Calendar.DST_OFFSET, 0); 2199 return ++pos.index; 2200 } 2201 2202 // parse text as "+/-hh[[:]mm]" based on count 2203 if (c == '+') { 2204 sign = 1; 2205 } else if (c == '-') { 2206 sign = -1; 2207 } else { 2208 ++pos.index; 2209 break parsing; 2210 } 2211 int i = subParseNumericZone(text, ++pos.index, sign, count, 2212 count == 3, calb); 2213 if (i > 0) { 2214 return i; 2215 } 2216 pos.index = -i; 2217 } 2218 break parsing; 2219 2220 default: 2221 // case PATTERN_DAY_OF_MONTH: // 'd' 2222 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59 2223 // case PATTERN_MINUTE: // 'm' 2224 // case PATTERN_SECOND: // 's' 2225 // case PATTERN_MILLISECOND: // 'S' 2226 // case PATTERN_DAY_OF_YEAR: // 'D' 2227 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F' 2228 // case PATTERN_WEEK_OF_YEAR: // 'w' 2229 // case PATTERN_WEEK_OF_MONTH: // 'W' 2230 // case PATTERN_HOUR0: // 'K' 0-based. eg, 11PM + 1 hour =>> 0 AM 2231 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' (pseudo field); 2232 2233 // Handle "generic" fields 2234 if (obeyCount) { 2235 if ((start+count) > text.length()) { 2236 break parsing; 2237 } 2238 number = numberFormat.parse(text.substring(0, start+count), pos); 2239 } else { 2240 number = numberFormat.parse(text, pos); 2241 } 2242 if (number != null) { 2243 value = number.intValue(); 2244 2245 if (useFollowingMinusSignAsDelimiter && (value < 0) && 2246 (((pos.index < text.length()) && 2247 (text.charAt(pos.index) != minusSign)) || 2248 ((pos.index == text.length()) && 2249 (text.charAt(pos.index-1) == minusSign)))) { 2250 value = -value; 2251 pos.index--; 2252 } 2253 2254 calb.set(field, value); 2255 return pos.index; 2256 } 2257 break parsing; 2258 } 2259 } 2260 2261 // Parsing failed. 2262 origPos.errorIndex = pos.index; 2263 return -1; 2264 } 2265 2266 /** 2267 * Returns true if the DateFormatSymbols has been set explicitly or locale 2268 * is null. 2269 */ 2270 private boolean useDateFormatSymbols() { 2271 return useDateFormatSymbols || locale == null; 2272 } 2273 2274 /** 2275 * Translates a pattern, mapping each character in the from string to the 2276 * corresponding character in the to string. 2277 * 2278 * @exception IllegalArgumentException if the given pattern is invalid 2279 */ 2280 private String translatePattern(String pattern, String from, String to) { 2281 StringBuilder result = new StringBuilder(); 2282 boolean inQuote = false; 2283 for (int i = 0; i < pattern.length(); ++i) { 2284 char c = pattern.charAt(i); 2285 if (inQuote) { 2286 if (c == '\'') { 2287 inQuote = false; 2288 } 2289 } 2290 else { 2291 if (c == '\'') { 2292 inQuote = true; 2293 } else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) { 2294 int ci = from.indexOf(c); 2295 if (ci >= 0) { 2296 // patternChars is longer than localPatternChars due 2297 // to serialization compatibility. The pattern letters 2298 // unsupported by localPatternChars pass through. 2299 if (ci < to.length()) { 2300 c = to.charAt(ci); 2301 } 2302 } else { 2303 throw new IllegalArgumentException("Illegal pattern " + 2304 " character '" + 2305 c + "'"); 2306 } 2307 } 2308 } 2309 result.append(c); 2310 } 2311 if (inQuote) { 2312 throw new IllegalArgumentException("Unfinished quote in pattern"); 2313 } 2314 return result.toString(); 2315 } 2316 2317 /** 2318 * Returns a pattern string describing this date format. 2319 * 2320 * @return a pattern string describing this date format. 2321 */ 2322 public String toPattern() { 2323 return pattern; 2324 } 2325 2326 /** 2327 * Returns a localized pattern string describing this date format. 2328 * 2329 * @return a localized pattern string describing this date format. 2330 */ 2331 public String toLocalizedPattern() { 2332 return translatePattern(pattern, 2333 DateFormatSymbols.patternChars, 2334 formatData.getLocalPatternChars()); 2335 } 2336 2337 /** 2338 * Applies the given pattern string to this date format. 2339 * 2340 * @param pattern the new date and time pattern for this date format 2341 * @exception NullPointerException if the given pattern is null 2342 * @exception IllegalArgumentException if the given pattern is invalid 2343 */ 2344 public void applyPattern(String pattern) 2345 { 2346 applyPatternImpl(pattern); 2347 } 2348 2349 private void applyPatternImpl(String pattern) { 2350 compiledPattern = compile(pattern); 2351 this.pattern = pattern; 2352 } 2353 2354 /** 2355 * Applies the given localized pattern string to this date format. 2356 * 2357 * @param pattern a String to be mapped to the new date and time format 2358 * pattern for this format 2359 * @exception NullPointerException if the given pattern is null 2360 * @exception IllegalArgumentException if the given pattern is invalid 2361 */ 2362 public void applyLocalizedPattern(String pattern) { 2363 String p = translatePattern(pattern, 2364 formatData.getLocalPatternChars(), 2365 DateFormatSymbols.patternChars); 2366 compiledPattern = compile(p); 2367 this.pattern = p; 2368 } 2369 2370 /** 2371 * Gets a copy of the date and time format symbols of this date format. 2372 * 2373 * @return the date and time format symbols of this date format 2374 * @see #setDateFormatSymbols 2375 */ 2376 public DateFormatSymbols getDateFormatSymbols() 2377 { 2378 return (DateFormatSymbols)formatData.clone(); 2379 } 2380 2381 /** 2382 * Sets the date and time format symbols of this date format. 2383 * 2384 * @param newFormatSymbols the new date and time format symbols 2385 * @exception NullPointerException if the given newFormatSymbols is null 2386 * @see #getDateFormatSymbols 2387 */ 2388 public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols) 2389 { 2390 this.formatData = (DateFormatSymbols)newFormatSymbols.clone(); 2391 useDateFormatSymbols = true; 2392 } 2393 2394 /** 2395 * Creates a copy of this <code>SimpleDateFormat</code>. This also 2396 * clones the format's date format symbols. 2397 * 2398 * @return a clone of this <code>SimpleDateFormat</code> 2399 */ 2400 @Override 2401 public Object clone() { 2402 SimpleDateFormat other = (SimpleDateFormat) super.clone(); 2403 other.formatData = (DateFormatSymbols) formatData.clone(); 2404 return other; 2405 } 2406 2407 /** 2408 * Returns the hash code value for this <code>SimpleDateFormat</code> object. 2409 * 2410 * @return the hash code value for this <code>SimpleDateFormat</code> object. 2411 */ 2412 @Override 2413 public int hashCode() 2414 { 2415 return pattern.hashCode(); 2416 // just enough fields for a reasonable distribution 2417 } 2418 2419 /** 2420 * Compares the given object with this <code>SimpleDateFormat</code> for 2421 * equality. 2422 * 2423 * @return true if the given object is equal to this 2424 * <code>SimpleDateFormat</code> 2425 */ 2426 @Override 2427 public boolean equals(Object obj) 2428 { 2429 if (!super.equals(obj)) { 2430 return false; // super does class check 2431 } 2432 SimpleDateFormat that = (SimpleDateFormat) obj; 2433 return (pattern.equals(that.pattern) 2434 && formatData.equals(that.formatData)); 2435 } 2436 2437 private static final int[] REST_OF_STYLES = { 2438 Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT, Calendar.LONG_STANDALONE, 2439 }; 2440 private Map<String, Integer> getDisplayNamesMap(int field, Locale locale) { 2441 Map<String, Integer> map = calendar.getDisplayNames(field, Calendar.SHORT_FORMAT, locale); 2442 // Get all SHORT and LONG styles (avoid NARROW styles). 2443 for (int style : REST_OF_STYLES) { 2444 Map<String, Integer> m = calendar.getDisplayNames(field, style, locale); 2445 if (m != null) { 2446 map.putAll(m); 2447 } 2448 } 2449 return map; 2450 } 2451 2452 /** 2453 * After reading an object from the input stream, the format 2454 * pattern in the object is verified. 2455 * 2456 * @exception InvalidObjectException if the pattern is invalid 2457 */ 2458 private void readObject(ObjectInputStream stream) 2459 throws IOException, ClassNotFoundException { 2460 stream.defaultReadObject(); 2461 2462 try { 2463 compiledPattern = compile(pattern); 2464 } catch (Exception e) { 2465 throw new InvalidObjectException("invalid pattern"); 2466 } 2467 2468 if (serialVersionOnStream < 1) { 2469 // didn't have defaultCenturyStart field 2470 initializeDefaultCentury(); 2471 } 2472 else { 2473 // fill in dependent transient field 2474 parseAmbiguousDatesAsAfter(defaultCenturyStart); 2475 } 2476 serialVersionOnStream = currentSerialVersion; 2477 2478 // If the deserialized object has a SimpleTimeZone, try 2479 // to replace it with a ZoneInfo equivalent in order to 2480 // be compatible with the SimpleTimeZone-based 2481 // implementation as much as possible. 2482 TimeZone tz = getTimeZone(); 2483 if (tz instanceof SimpleTimeZone) { 2484 String id = tz.getID(); 2485 TimeZone zi = TimeZone.getTimeZone(id); 2486 if (zi != null && zi.hasSameRules(tz) && zi.getID().equals(id)) { 2487 setTimeZone(zi); 2488 } 2489 } 2490 } 2491 2492 /** 2493 * Analyze the negative subpattern of DecimalFormat and set/update values 2494 * as necessary. 2495 */ 2496 private void checkNegativeNumberExpression() { 2497 if ((numberFormat instanceof DecimalFormat) && 2498 !numberFormat.equals(originalNumberFormat)) { 2499 String numberPattern = ((DecimalFormat)numberFormat).toPattern(); 2500 if (!numberPattern.equals(originalNumberPattern)) { 2501 hasFollowingMinusSign = false; 2502 2503 int separatorIndex = numberPattern.indexOf(';'); 2504 // If the negative subpattern is not absent, we have to analayze 2505 // it in order to check if it has a following minus sign. 2506 if (separatorIndex > -1) { 2507 int minusIndex = numberPattern.indexOf('-', separatorIndex); 2508 if ((minusIndex > numberPattern.lastIndexOf('0')) && 2509 (minusIndex > numberPattern.lastIndexOf('#'))) { 2510 hasFollowingMinusSign = true; 2511 minusSign = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getMinusSign(); 2512 } 2513 } 2514 originalNumberPattern = numberPattern; 2515 } 2516 originalNumberFormat = numberFormat; 2517 } 2518 } 2519 2520 }