SimpleDateFormat.java revision 12745:f068a4ffddd2
1/* 2 * Copyright (c) 1996, 2013, 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 39package java.text; 40 41import java.io.IOException; 42import java.io.InvalidObjectException; 43import java.io.ObjectInputStream; 44import static java.text.DateFormatSymbols.*; 45import java.util.Calendar; 46import java.util.Date; 47import java.util.GregorianCalendar; 48import java.util.Locale; 49import java.util.Map; 50import java.util.SimpleTimeZone; 51import java.util.SortedMap; 52import java.util.TimeZone; 53import java.util.concurrent.ConcurrentHashMap; 54import java.util.concurrent.ConcurrentMap; 55import sun.util.calendar.CalendarUtils; 56import sun.util.calendar.ZoneInfoFile; 57import sun.util.locale.provider.LocaleProviderAdapter; 58 59/** 60 * <code>SimpleDateFormat</code> is a concrete class for formatting and 61 * parsing dates in a locale-sensitive manner. It allows for formatting 62 * (date → text), parsing (text → date), and normalization. 63 * 64 * <p> 65 * <code>SimpleDateFormat</code> allows you to start by choosing 66 * any user-defined patterns for date-time formatting. However, you 67 * are encouraged to create a date-time formatter with either 68 * <code>getTimeInstance</code>, <code>getDateInstance</code>, or 69 * <code>getDateTimeInstance</code> in <code>DateFormat</code>. Each 70 * of these class methods can return a date/time formatter initialized 71 * with a default format pattern. You may modify the format pattern 72 * using the <code>applyPattern</code> methods as desired. 73 * For more information on using these methods, see 74 * {@link DateFormat}. 75 * 76 * <h3>Date and Time Patterns</h3> 77 * <p> 78 * Date and time formats are specified by <em>date and time pattern</em> 79 * strings. 80 * Within date and time pattern strings, unquoted letters from 81 * <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to 82 * <code>'z'</code> are interpreted as pattern letters representing the 83 * components of a date or time string. 84 * Text can be quoted using single quotes (<code>'</code>) to avoid 85 * interpretation. 86 * <code>"''"</code> represents a single quote. 87 * All other characters are not interpreted; they're simply copied into the 88 * output string during formatting or matched against the input string 89 * during parsing. 90 * <p> 91 * The following pattern letters are defined (all other characters from 92 * <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to 93 * <code>'z'</code> are reserved): 94 * <blockquote> 95 * <table border=0 cellspacing=3 cellpadding=0 summary="Chart shows pattern letters, date/time component, presentation, and examples."> 96 * <tr style="background-color: rgb(204, 204, 255);"> 97 * <th align=left>Letter 98 * <th align=left>Date or Time Component 99 * <th align=left>Presentation 100 * <th align=left>Examples 101 * <tr> 102 * <td><code>G</code> 103 * <td>Era designator 104 * <td><a href="#text">Text</a> 105 * <td><code>AD</code> 106 * <tr style="background-color: rgb(238, 238, 255);"> 107 * <td><code>y</code> 108 * <td>Year 109 * <td><a href="#year">Year</a> 110 * <td><code>1996</code>; <code>96</code> 111 * <tr> 112 * <td><code>Y</code> 113 * <td>Week year 114 * <td><a href="#year">Year</a> 115 * <td><code>2009</code>; <code>09</code> 116 * <tr style="background-color: rgb(238, 238, 255);"> 117 * <td><code>M</code> 118 * <td>Month in year (context sensitive) 119 * <td><a href="#month">Month</a> 120 * <td><code>July</code>; <code>Jul</code>; <code>07</code> 121 * <tr> 122 * <td><code>L</code> 123 * <td>Month in year (standalone form) 124 * <td><a href="#month">Month</a> 125 * <td><code>July</code>; <code>Jul</code>; <code>07</code> 126 * <tr style="background-color: rgb(238, 238, 255);"> 127 * <td><code>w</code> 128 * <td>Week in year 129 * <td><a href="#number">Number</a> 130 * <td><code>27</code> 131 * <tr> 132 * <td><code>W</code> 133 * <td>Week in month 134 * <td><a href="#number">Number</a> 135 * <td><code>2</code> 136 * <tr style="background-color: rgb(238, 238, 255);"> 137 * <td><code>D</code> 138 * <td>Day in year 139 * <td><a href="#number">Number</a> 140 * <td><code>189</code> 141 * <tr> 142 * <td><code>d</code> 143 * <td>Day in month 144 * <td><a href="#number">Number</a> 145 * <td><code>10</code> 146 * <tr style="background-color: rgb(238, 238, 255);"> 147 * <td><code>F</code> 148 * <td>Day of week in month 149 * <td><a href="#number">Number</a> 150 * <td><code>2</code> 151 * <tr> 152 * <td><code>E</code> 153 * <td>Day name in week 154 * <td><a href="#text">Text</a> 155 * <td><code>Tuesday</code>; <code>Tue</code> 156 * <tr style="background-color: rgb(238, 238, 255);"> 157 * <td><code>u</code> 158 * <td>Day number of week (1 = Monday, ..., 7 = Sunday) 159 * <td><a href="#number">Number</a> 160 * <td><code>1</code> 161 * <tr> 162 * <td><code>a</code> 163 * <td>Am/pm marker 164 * <td><a href="#text">Text</a> 165 * <td><code>PM</code> 166 * <tr style="background-color: rgb(238, 238, 255);"> 167 * <td><code>H</code> 168 * <td>Hour in day (0-23) 169 * <td><a href="#number">Number</a> 170 * <td><code>0</code> 171 * <tr> 172 * <td><code>k</code> 173 * <td>Hour in day (1-24) 174 * <td><a href="#number">Number</a> 175 * <td><code>24</code> 176 * <tr style="background-color: rgb(238, 238, 255);"> 177 * <td><code>K</code> 178 * <td>Hour in am/pm (0-11) 179 * <td><a href="#number">Number</a> 180 * <td><code>0</code> 181 * <tr> 182 * <td><code>h</code> 183 * <td>Hour in am/pm (1-12) 184 * <td><a href="#number">Number</a> 185 * <td><code>12</code> 186 * <tr style="background-color: rgb(238, 238, 255);"> 187 * <td><code>m</code> 188 * <td>Minute in hour 189 * <td><a href="#number">Number</a> 190 * <td><code>30</code> 191 * <tr> 192 * <td><code>s</code> 193 * <td>Second in minute 194 * <td><a href="#number">Number</a> 195 * <td><code>55</code> 196 * <tr style="background-color: rgb(238, 238, 255);"> 197 * <td><code>S</code> 198 * <td>Millisecond 199 * <td><a href="#number">Number</a> 200 * <td><code>978</code> 201 * <tr> 202 * <td><code>z</code> 203 * <td>Time zone 204 * <td><a href="#timezone">General time zone</a> 205 * <td><code>Pacific Standard Time</code>; <code>PST</code>; <code>GMT-08:00</code> 206 * <tr style="background-color: rgb(238, 238, 255);"> 207 * <td><code>Z</code> 208 * <td>Time zone 209 * <td><a href="#rfc822timezone">RFC 822 time zone</a> 210 * <td><code>-0800</code> 211 * <tr> 212 * <td><code>X</code> 213 * <td>Time zone 214 * <td><a href="#iso8601timezone">ISO 8601 time zone</a> 215 * <td><code>-08</code>; <code>-0800</code>; <code>-08:00</code> 216 * </table> 217 * </blockquote> 218 * Pattern letters are usually repeated, as their number determines the 219 * exact presentation: 220 * <ul> 221 * <li><strong><a name="text">Text:</a></strong> 222 * For formatting, if the number of pattern letters is 4 or more, 223 * the full form is used; otherwise a short or abbreviated form 224 * is used if available. 225 * For parsing, both forms are accepted, independent of the number 226 * of pattern letters.<br><br></li> 227 * <li><strong><a name="number">Number:</a></strong> 228 * For formatting, the number of pattern letters is the minimum 229 * number of digits, and shorter numbers are zero-padded to this amount. 230 * For parsing, the number of pattern letters is ignored unless 231 * it's needed to separate two adjacent fields.<br><br></li> 232 * <li><strong><a name="year">Year:</a></strong> 233 * If the formatter's {@link #getCalendar() Calendar} is the Gregorian 234 * calendar, the following rules are applied.<br> 235 * <ul> 236 * <li>For formatting, if the number of pattern letters is 2, the year 237 * is truncated to 2 digits; otherwise it is interpreted as a 238 * <a href="#number">number</a>. 239 * <li>For parsing, if the number of pattern letters is more than 2, 240 * the year is interpreted literally, regardless of the number of 241 * digits. So using the pattern "MM/dd/yyyy", "01/11/12" parses to 242 * Jan 11, 12 A.D. 243 * <li>For parsing with the abbreviated year pattern ("y" or "yy"), 244 * <code>SimpleDateFormat</code> must interpret the abbreviated year 245 * relative to some century. It does this by adjusting dates to be 246 * within 80 years before and 20 years after the time the <code>SimpleDateFormat</code> 247 * instance is created. For example, using a pattern of "MM/dd/yy" and a 248 * <code>SimpleDateFormat</code> instance created on Jan 1, 1997, the string 249 * "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64" 250 * would be interpreted as May 4, 1964. 251 * During parsing, only strings consisting of exactly two digits, as defined by 252 * {@link Character#isDigit(char)}, will be parsed into the default century. 253 * Any other numeric string, such as a one digit string, a three or more digit 254 * string, or a two digit string that isn't all digits (for example, "-1"), is 255 * interpreted literally. So "01/02/3" or "01/02/003" are parsed, using the 256 * same pattern, as Jan 2, 3 AD. Likewise, "01/02/-3" is parsed as Jan 2, 4 BC. 257 * </ul> 258 * Otherwise, calendar system specific forms are applied. 259 * For both formatting and parsing, if the number of pattern 260 * letters is 4 or more, a calendar specific {@linkplain 261 * Calendar#LONG long form} is used. Otherwise, a calendar 262 * specific {@linkplain Calendar#SHORT short or abbreviated form} 263 * is used.<br> 264 * <br> 265 * If week year {@code 'Y'} is specified and the {@linkplain 266 * #getCalendar() calendar} doesn't support any <a 267 * href="../util/GregorianCalendar.html#week_year"> week 268 * years</a>, the calendar year ({@code 'y'}) is used instead. The 269 * support of week years can be tested with a call to {@link 270 * DateFormat#getCalendar() getCalendar()}.{@link 271 * java.util.Calendar#isWeekDateSupported() 272 * isWeekDateSupported()}.<br><br></li> 273 * <li><strong><a name="month">Month:</a></strong> 274 * If the number of pattern letters is 3 or more, the month is 275 * interpreted as <a href="#text">text</a>; otherwise, 276 * it is interpreted as a <a href="#number">number</a>.<br> 277 * <ul> 278 * <li>Letter <em>M</em> produces context-sensitive month names, such as the 279 * embedded form of names. If a {@code DateFormatSymbols} has been set 280 * explicitly with constructor {@link #SimpleDateFormat(String, 281 * DateFormatSymbols)} or method {@link 282 * #setDateFormatSymbols(DateFormatSymbols)}, the month names given by 283 * the {@code DateFormatSymbols} are used.</li> 284 * <li>Letter <em>L</em> produces the standalone form of month names.</li> 285 * </ul> 286 * <br></li> 287 * <li><strong><a name="timezone">General time zone:</a></strong> 288 * Time zones are interpreted as <a href="#text">text</a> if they have 289 * names. For time zones representing a GMT offset value, the 290 * following syntax is used: 291 * <pre> 292 * <a name="GMTOffsetTimeZone"><i>GMTOffsetTimeZone:</i></a> 293 * <code>GMT</code> <i>Sign</i> <i>Hours</i> <code>:</code> <i>Minutes</i> 294 * <i>Sign:</i> one of 295 * <code>+ -</code> 296 * <i>Hours:</i> 297 * <i>Digit</i> 298 * <i>Digit</i> <i>Digit</i> 299 * <i>Minutes:</i> 300 * <i>Digit</i> <i>Digit</i> 301 * <i>Digit:</i> one of 302 * <code>0 1 2 3 4 5 6 7 8 9</code></pre> 303 * <i>Hours</i> must be between 0 and 23, and <i>Minutes</i> must be between 304 * 00 and 59. The format is locale independent and digits must be taken 305 * from the Basic Latin block of the Unicode standard. 306 * <p>For parsing, <a href="#rfc822timezone">RFC 822 time zones</a> are also 307 * accepted.<br><br></li> 308 * <li><strong><a name="rfc822timezone">RFC 822 time zone:</a></strong> 309 * For formatting, the RFC 822 4-digit time zone format is used: 310 * 311 * <pre> 312 * <i>RFC822TimeZone:</i> 313 * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i> 314 * <i>TwoDigitHours:</i> 315 * <i>Digit Digit</i></pre> 316 * <i>TwoDigitHours</i> must be between 00 and 23. Other definitions 317 * are as for <a href="#timezone">general time zones</a>. 318 * 319 * <p>For parsing, <a href="#timezone">general time zones</a> are also 320 * accepted. 321 * <li><strong><a name="iso8601timezone">ISO 8601 Time zone:</a></strong> 322 * The number of pattern letters designates the format for both formatting 323 * and parsing as follows: 324 * <pre> 325 * <i>ISO8601TimeZone:</i> 326 * <i>OneLetterISO8601TimeZone</i> 327 * <i>TwoLetterISO8601TimeZone</i> 328 * <i>ThreeLetterISO8601TimeZone</i> 329 * <i>OneLetterISO8601TimeZone:</i> 330 * <i>Sign</i> <i>TwoDigitHours</i> 331 * {@code Z} 332 * <i>TwoLetterISO8601TimeZone:</i> 333 * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i> 334 * {@code Z} 335 * <i>ThreeLetterISO8601TimeZone:</i> 336 * <i>Sign</i> <i>TwoDigitHours</i> {@code :} <i>Minutes</i> 337 * {@code Z}</pre> 338 * Other definitions are as for <a href="#timezone">general time zones</a> or 339 * <a href="#rfc822timezone">RFC 822 time zones</a>. 340 * 341 * <p>For formatting, if the offset value from GMT is 0, {@code "Z"} is 342 * produced. If the number of pattern letters is 1, any fraction of an hour 343 * is ignored. For example, if the pattern is {@code "X"} and the time zone is 344 * {@code "GMT+05:30"}, {@code "+05"} is produced. 345 * 346 * <p>For parsing, {@code "Z"} is parsed as the UTC time zone designator. 347 * <a href="#timezone">General time zones</a> are <em>not</em> accepted. 348 * 349 * <p>If the number of pattern letters is 4 or more, {@link 350 * IllegalArgumentException} is thrown when constructing a {@code 351 * SimpleDateFormat} or {@linkplain #applyPattern(String) applying a 352 * pattern}. 353 * </ul> 354 * <code>SimpleDateFormat</code> also supports <em>localized date and time 355 * pattern</em> strings. In these strings, the pattern letters described above 356 * may be replaced with other, locale dependent, pattern letters. 357 * <code>SimpleDateFormat</code> does not deal with the localization of text 358 * other than the pattern letters; that's up to the client of the class. 359 * 360 * <h4>Examples</h4> 361 * 362 * The following examples show how date and time patterns are interpreted in 363 * the U.S. locale. The given date and time are 2001-07-04 12:08:56 local time 364 * in the U.S. Pacific Time time zone. 365 * <blockquote> 366 * <table border=0 cellspacing=3 cellpadding=0 summary="Examples of date and time patterns interpreted in the U.S. locale"> 367 * <tr style="background-color: rgb(204, 204, 255);"> 368 * <th align=left>Date and Time Pattern 369 * <th align=left>Result 370 * <tr> 371 * <td><code>"yyyy.MM.dd G 'at' HH:mm:ss z"</code> 372 * <td><code>2001.07.04 AD at 12:08:56 PDT</code> 373 * <tr style="background-color: rgb(238, 238, 255);"> 374 * <td><code>"EEE, MMM d, ''yy"</code> 375 * <td><code>Wed, Jul 4, '01</code> 376 * <tr> 377 * <td><code>"h:mm a"</code> 378 * <td><code>12:08 PM</code> 379 * <tr style="background-color: rgb(238, 238, 255);"> 380 * <td><code>"hh 'o''clock' a, zzzz"</code> 381 * <td><code>12 o'clock PM, Pacific Daylight Time</code> 382 * <tr> 383 * <td><code>"K:mm a, z"</code> 384 * <td><code>0:08 PM, PDT</code> 385 * <tr style="background-color: rgb(238, 238, 255);"> 386 * <td><code>"yyyyy.MMMMM.dd GGG hh:mm aaa"</code> 387 * <td><code>02001.July.04 AD 12:08 PM</code> 388 * <tr> 389 * <td><code>"EEE, d MMM yyyy HH:mm:ss Z"</code> 390 * <td><code>Wed, 4 Jul 2001 12:08:56 -0700</code> 391 * <tr style="background-color: rgb(238, 238, 255);"> 392 * <td><code>"yyMMddHHmmssZ"</code> 393 * <td><code>010704120856-0700</code> 394 * <tr> 395 * <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSZ"</code> 396 * <td><code>2001-07-04T12:08:56.235-0700</code> 397 * <tr style="background-color: rgb(238, 238, 255);"> 398 * <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSXXX"</code> 399 * <td><code>2001-07-04T12:08:56.235-07:00</code> 400 * <tr> 401 * <td><code>"YYYY-'W'ww-u"</code> 402 * <td><code>2001-W27-3</code> 403 * </table> 404 * </blockquote> 405 * 406 * <h4><a name="synchronization">Synchronization</a></h4> 407 * 408 * <p> 409 * Date formats are not synchronized. 410 * It is recommended to create separate format instances for each thread. 411 * If multiple threads access a format concurrently, it must be synchronized 412 * externally. 413 * 414 * @see <a href="http://docs.oracle.com/javase/tutorial/i18n/format/simpleDateFormat.html">Java Tutorial</a> 415 * @see java.util.Calendar 416 * @see java.util.TimeZone 417 * @see DateFormat 418 * @see DateFormatSymbols 419 * @author Mark Davis, Chen-Lieh Huang, Alan Liu 420 */ 421public class SimpleDateFormat extends DateFormat { 422 423 // the official serial version ID which says cryptically 424 // which version we're compatible with 425 static final long serialVersionUID = 4774881970558875024L; 426 427 // the internal serial version which says which version was written 428 // - 0 (default) for version up to JDK 1.1.3 429 // - 1 for version from JDK 1.1.4, which includes a new field 430 static final int currentSerialVersion = 1; 431 432 /** 433 * The version of the serialized data on the stream. Possible values: 434 * <ul> 435 * <li><b>0</b> or not present on stream: JDK 1.1.3. This version 436 * has no <code>defaultCenturyStart</code> on stream. 437 * <li><b>1</b> JDK 1.1.4 or later. This version adds 438 * <code>defaultCenturyStart</code>. 439 * </ul> 440 * When streaming out this class, the most recent format 441 * and the highest allowable <code>serialVersionOnStream</code> 442 * is written. 443 * @serial 444 * @since 1.1.4 445 */ 446 private int serialVersionOnStream = currentSerialVersion; 447 448 /** 449 * The pattern string of this formatter. This is always a non-localized 450 * pattern. May not be null. See class documentation for details. 451 * @serial 452 */ 453 private String pattern; 454 455 /** 456 * Saved numberFormat and pattern. 457 * @see SimpleDateFormat#checkNegativeNumberExpression 458 */ 459 private transient NumberFormat originalNumberFormat; 460 private transient String originalNumberPattern; 461 462 /** 463 * The minus sign to be used with format and parse. 464 */ 465 private transient char minusSign = '-'; 466 467 /** 468 * True when a negative sign follows a number. 469 * (True as default in Arabic.) 470 */ 471 private transient boolean hasFollowingMinusSign = false; 472 473 /** 474 * True if standalone form needs to be used. 475 */ 476 private transient boolean forceStandaloneForm = false; 477 478 /** 479 * The compiled pattern. 480 */ 481 private transient char[] compiledPattern; 482 483 /** 484 * Tags for the compiled pattern. 485 */ 486 private static final int TAG_QUOTE_ASCII_CHAR = 100; 487 private static final int TAG_QUOTE_CHARS = 101; 488 489 /** 490 * Locale dependent digit zero. 491 * @see #zeroPaddingNumber 492 * @see java.text.DecimalFormatSymbols#getZeroDigit 493 */ 494 private transient char zeroDigit; 495 496 /** 497 * The symbols used by this formatter for week names, month names, 498 * etc. May not be null. 499 * @serial 500 * @see java.text.DateFormatSymbols 501 */ 502 private DateFormatSymbols formatData; 503 504 /** 505 * We map dates with two-digit years into the century starting at 506 * <code>defaultCenturyStart</code>, which may be any date. May 507 * not be null. 508 * @serial 509 * @since 1.1.4 510 */ 511 private Date defaultCenturyStart; 512 513 private transient int defaultCenturyStartYear; 514 515 private static final int MILLIS_PER_MINUTE = 60 * 1000; 516 517 // For time zones that have no names, use strings GMT+minutes and 518 // GMT-minutes. For instance, in France the time zone is GMT+60. 519 private static final String GMT = "GMT"; 520 521 /** 522 * Cache NumberFormat instances with Locale key. 523 */ 524 private static final ConcurrentMap<Locale, NumberFormat> cachedNumberFormatData 525 = new ConcurrentHashMap<>(3); 526 527 /** 528 * The Locale used to instantiate this 529 * <code>SimpleDateFormat</code>. The value may be null if this object 530 * has been created by an older <code>SimpleDateFormat</code> and 531 * deserialized. 532 * 533 * @serial 534 * @since 1.6 535 */ 536 private Locale locale; 537 538 /** 539 * Indicates whether this <code>SimpleDateFormat</code> should use 540 * the DateFormatSymbols. If true, the format and parse methods 541 * use the DateFormatSymbols values. If false, the format and 542 * parse methods call Calendar.getDisplayName or 543 * Calendar.getDisplayNames. 544 */ 545 transient boolean useDateFormatSymbols; 546 547 /** 548 * Constructs a <code>SimpleDateFormat</code> using the default pattern and 549 * date format symbols for the default 550 * {@link java.util.Locale.Category#FORMAT FORMAT} locale. 551 * <b>Note:</b> This constructor may not support all locales. 552 * For full coverage, use the factory methods in the {@link DateFormat} 553 * class. 554 */ 555 public SimpleDateFormat() { 556 this("", Locale.getDefault(Locale.Category.FORMAT)); 557 applyPatternImpl(LocaleProviderAdapter.getResourceBundleBased().getLocaleResources(locale) 558 .getDateTimePattern(SHORT, SHORT, calendar)); 559 } 560 561 /** 562 * Constructs a <code>SimpleDateFormat</code> using the given pattern and 563 * the default date format symbols for the default 564 * {@link java.util.Locale.Category#FORMAT FORMAT} locale. 565 * <b>Note:</b> This constructor may not support all locales. 566 * For full coverage, use the factory methods in the {@link DateFormat} 567 * class. 568 * <p>This is equivalent to calling 569 * {@link #SimpleDateFormat(String, Locale) 570 * SimpleDateFormat(pattern, Locale.getDefault(Locale.Category.FORMAT))}. 571 * 572 * @see java.util.Locale#getDefault(java.util.Locale.Category) 573 * @see java.util.Locale.Category#FORMAT 574 * @param pattern the pattern describing the date and time format 575 * @exception NullPointerException if the given pattern is null 576 * @exception IllegalArgumentException if the given pattern is invalid 577 */ 578 public SimpleDateFormat(String pattern) 579 { 580 this(pattern, Locale.getDefault(Locale.Category.FORMAT)); 581 } 582 583 /** 584 * Constructs a <code>SimpleDateFormat</code> using the given pattern and 585 * the default date format symbols for the given locale. 586 * <b>Note:</b> This constructor may not support all locales. 587 * For full coverage, use the factory methods in the {@link DateFormat} 588 * class. 589 * 590 * @param pattern the pattern describing the date and time format 591 * @param locale the locale whose date format symbols should be used 592 * @exception NullPointerException if the given pattern or locale is null 593 * @exception IllegalArgumentException if the given pattern is invalid 594 */ 595 public SimpleDateFormat(String pattern, Locale locale) 596 { 597 if (pattern == null || locale == null) { 598 throw new NullPointerException(); 599 } 600 601 initializeCalendar(locale); 602 this.pattern = pattern; 603 this.formatData = DateFormatSymbols.getInstanceRef(locale); 604 this.locale = locale; 605 initialize(locale); 606 } 607 608 /** 609 * Constructs a <code>SimpleDateFormat</code> using the given pattern and 610 * date format symbols. 611 * 612 * @param pattern the pattern describing the date and time format 613 * @param formatSymbols the date format symbols to be used for formatting 614 * @exception NullPointerException if the given pattern or formatSymbols is null 615 * @exception IllegalArgumentException if the given pattern is invalid 616 */ 617 public SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols) 618 { 619 if (pattern == null || formatSymbols == null) { 620 throw new NullPointerException(); 621 } 622 623 this.pattern = pattern; 624 this.formatData = (DateFormatSymbols) formatSymbols.clone(); 625 this.locale = Locale.getDefault(Locale.Category.FORMAT); 626 initializeCalendar(this.locale); 627 initialize(this.locale); 628 useDateFormatSymbols = true; 629 } 630 631 /* Initialize compiledPattern and numberFormat fields */ 632 private void initialize(Locale loc) { 633 // Verify and compile the given pattern. 634 compiledPattern = compile(pattern); 635 636 /* try the cache first */ 637 numberFormat = cachedNumberFormatData.get(loc); 638 if (numberFormat == null) { /* cache miss */ 639 numberFormat = NumberFormat.getIntegerInstance(loc); 640 numberFormat.setGroupingUsed(false); 641 642 /* update cache */ 643 cachedNumberFormatData.putIfAbsent(loc, numberFormat); 644 } 645 numberFormat = (NumberFormat) numberFormat.clone(); 646 647 initializeDefaultCentury(); 648 } 649 650 private void initializeCalendar(Locale loc) { 651 if (calendar == null) { 652 assert loc != null; 653 // The format object must be constructed using the symbols for this zone. 654 // However, the calendar should use the current default TimeZone. 655 // If this is not contained in the locale zone strings, then the zone 656 // will be formatted using generic GMT+/-H:MM nomenclature. 657 calendar = Calendar.getInstance(TimeZone.getDefault(), loc); 658 } 659 } 660 661 /** 662 * Returns the compiled form of the given pattern. The syntax of 663 * the compiled pattern is: 664 * <blockquote> 665 * CompiledPattern: 666 * EntryList 667 * EntryList: 668 * Entry 669 * EntryList Entry 670 * Entry: 671 * TagField 672 * TagField data 673 * TagField: 674 * Tag Length 675 * TaggedData 676 * Tag: 677 * pattern_char_index 678 * TAG_QUOTE_CHARS 679 * Length: 680 * short_length 681 * long_length 682 * TaggedData: 683 * TAG_QUOTE_ASCII_CHAR ascii_char 684 * 685 * </blockquote> 686 * 687 * where `short_length' is an 8-bit unsigned integer between 0 and 688 * 254. `long_length' is a sequence of an 8-bit integer 255 and a 689 * 32-bit signed integer value which is split into upper and lower 690 * 16-bit fields in two char's. `pattern_char_index' is an 8-bit 691 * integer between 0 and 18. `ascii_char' is an 7-bit ASCII 692 * character value. `data' depends on its Tag value. 693 * <p> 694 * If Length is short_length, Tag and short_length are packed in a 695 * single char, as illustrated below. 696 * <blockquote> 697 * char[0] = (Tag << 8) | short_length; 698 * </blockquote> 699 * 700 * If Length is long_length, Tag and 255 are packed in the first 701 * char and a 32-bit integer, as illustrated below. 702 * <blockquote> 703 * char[0] = (Tag << 8) | 255; 704 * char[1] = (char) (long_length >>> 16); 705 * char[2] = (char) (long_length & 0xffff); 706 * </blockquote> 707 * <p> 708 * If Tag is a pattern_char_index, its Length is the number of 709 * pattern characters. For example, if the given pattern is 710 * "yyyy", Tag is 1 and Length is 4, followed by no data. 711 * <p> 712 * If Tag is TAG_QUOTE_CHARS, its Length is the number of char's 713 * following the TagField. For example, if the given pattern is 714 * "'o''clock'", Length is 7 followed by a char sequence of 715 * <code>o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k</code>. 716 * <p> 717 * TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII 718 * character in place of Length. For example, if the given pattern 719 * is "'o'", the TaggedData entry is 720 * <code>((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o')</code>. 721 * 722 * @exception NullPointerException if the given pattern is null 723 * @exception IllegalArgumentException if the given pattern is invalid 724 */ 725 private char[] compile(String pattern) { 726 int length = pattern.length(); 727 boolean inQuote = false; 728 StringBuilder compiledCode = new StringBuilder(length * 2); 729 StringBuilder tmpBuffer = null; 730 int count = 0, tagcount = 0; 731 int lastTag = -1, prevTag = -1; 732 733 for (int i = 0; i < length; i++) { 734 char c = pattern.charAt(i); 735 736 if (c == '\'') { 737 // '' is treated as a single quote regardless of being 738 // in a quoted section. 739 if ((i + 1) < length) { 740 c = pattern.charAt(i + 1); 741 if (c == '\'') { 742 i++; 743 if (count != 0) { 744 encode(lastTag, count, compiledCode); 745 tagcount++; 746 prevTag = lastTag; 747 lastTag = -1; 748 count = 0; 749 } 750 if (inQuote) { 751 tmpBuffer.append(c); 752 } else { 753 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c)); 754 } 755 continue; 756 } 757 } 758 if (!inQuote) { 759 if (count != 0) { 760 encode(lastTag, count, compiledCode); 761 tagcount++; 762 prevTag = lastTag; 763 lastTag = -1; 764 count = 0; 765 } 766 if (tmpBuffer == null) { 767 tmpBuffer = new StringBuilder(length); 768 } else { 769 tmpBuffer.setLength(0); 770 } 771 inQuote = true; 772 } else { 773 int len = tmpBuffer.length(); 774 if (len == 1) { 775 char ch = tmpBuffer.charAt(0); 776 if (ch < 128) { 777 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | ch)); 778 } else { 779 compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | 1)); 780 compiledCode.append(ch); 781 } 782 } else { 783 encode(TAG_QUOTE_CHARS, len, compiledCode); 784 compiledCode.append(tmpBuffer); 785 } 786 inQuote = false; 787 } 788 continue; 789 } 790 if (inQuote) { 791 tmpBuffer.append(c); 792 continue; 793 } 794 if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')) { 795 if (count != 0) { 796 encode(lastTag, count, compiledCode); 797 tagcount++; 798 prevTag = lastTag; 799 lastTag = -1; 800 count = 0; 801 } 802 if (c < 128) { 803 // In most cases, c would be a delimiter, such as ':'. 804 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c)); 805 } else { 806 // Take any contiguous non-ASCII alphabet characters and 807 // put them in a single TAG_QUOTE_CHARS. 808 int j; 809 for (j = i + 1; j < length; j++) { 810 char d = pattern.charAt(j); 811 if (d == '\'' || (d >= 'a' && d <= 'z' || d >= 'A' && d <= 'Z')) { 812 break; 813 } 814 } 815 compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | (j - i))); 816 for (; i < j; i++) { 817 compiledCode.append(pattern.charAt(i)); 818 } 819 i--; 820 } 821 continue; 822 } 823 824 int tag; 825 if ((tag = DateFormatSymbols.patternChars.indexOf(c)) == -1) { 826 throw new IllegalArgumentException("Illegal pattern character " + 827 "'" + c + "'"); 828 } 829 if (lastTag == -1 || lastTag == tag) { 830 lastTag = tag; 831 count++; 832 continue; 833 } 834 encode(lastTag, count, compiledCode); 835 tagcount++; 836 prevTag = lastTag; 837 lastTag = tag; 838 count = 1; 839 } 840 841 if (inQuote) { 842 throw new IllegalArgumentException("Unterminated quote"); 843 } 844 845 if (count != 0) { 846 encode(lastTag, count, compiledCode); 847 tagcount++; 848 prevTag = lastTag; 849 } 850 851 forceStandaloneForm = (tagcount == 1 && prevTag == PATTERN_MONTH); 852 853 // Copy the compiled pattern to a char array 854 int len = compiledCode.length(); 855 char[] r = new char[len]; 856 compiledCode.getChars(0, len, r, 0); 857 return r; 858 } 859 860 /** 861 * Encodes the given tag and length and puts encoded char(s) into buffer. 862 */ 863 private static void encode(int tag, int length, StringBuilder buffer) { 864 if (tag == PATTERN_ISO_ZONE && length >= 4) { 865 throw new IllegalArgumentException("invalid ISO 8601 format: length=" + length); 866 } 867 if (length < 255) { 868 buffer.append((char)(tag << 8 | length)); 869 } else { 870 buffer.append((char)((tag << 8) | 0xff)); 871 buffer.append((char)(length >>> 16)); 872 buffer.append((char)(length & 0xffff)); 873 } 874 } 875 876 /* Initialize the fields we use to disambiguate ambiguous years. Separate 877 * so we can call it from readObject(). 878 */ 879 private void initializeDefaultCentury() { 880 calendar.setTimeInMillis(System.currentTimeMillis()); 881 calendar.add( Calendar.YEAR, -80 ); 882 parseAmbiguousDatesAsAfter(calendar.getTime()); 883 } 884 885 /* Define one-century window into which to disambiguate dates using 886 * two-digit years. 887 */ 888 private void parseAmbiguousDatesAsAfter(Date startDate) { 889 defaultCenturyStart = startDate; 890 calendar.setTime(startDate); 891 defaultCenturyStartYear = calendar.get(Calendar.YEAR); 892 } 893 894 /** 895 * Sets the 100-year period 2-digit years will be interpreted as being in 896 * to begin on the date the user specifies. 897 * 898 * @param startDate During parsing, two digit years will be placed in the range 899 * <code>startDate</code> to <code>startDate + 100 years</code>. 900 * @see #get2DigitYearStart 901 * @since 1.2 902 */ 903 public void set2DigitYearStart(Date startDate) { 904 parseAmbiguousDatesAsAfter(new Date(startDate.getTime())); 905 } 906 907 /** 908 * Returns the beginning date of the 100-year period 2-digit years are interpreted 909 * as being within. 910 * 911 * @return the start of the 100-year period into which two digit years are 912 * parsed 913 * @see #set2DigitYearStart 914 * @since 1.2 915 */ 916 public Date get2DigitYearStart() { 917 return (Date) defaultCenturyStart.clone(); 918 } 919 920 /** 921 * Formats the given <code>Date</code> into a date/time string and appends 922 * the result to the given <code>StringBuffer</code>. 923 * 924 * @param date the date-time value to be formatted into a date-time string. 925 * @param toAppendTo where the new date-time text is to be appended. 926 * @param pos the formatting position. On input: an alignment field, 927 * if desired. On output: the offsets of the alignment field. 928 * @return the formatted date-time string. 929 * @exception NullPointerException if the given {@code date} is {@code null}. 930 */ 931 @Override 932 public StringBuffer format(Date date, StringBuffer toAppendTo, 933 FieldPosition pos) 934 { 935 pos.beginIndex = pos.endIndex = 0; 936 return format(date, toAppendTo, pos.getFieldDelegate()); 937 } 938 939 // Called from Format after creating a FieldDelegate 940 private StringBuffer format(Date date, StringBuffer toAppendTo, 941 FieldDelegate delegate) { 942 // Convert input date to time field list 943 calendar.setTime(date); 944 945 boolean useDateFormatSymbols = useDateFormatSymbols(); 946 947 for (int i = 0; i < compiledPattern.length; ) { 948 int tag = compiledPattern[i] >>> 8; 949 int count = compiledPattern[i++] & 0xff; 950 if (count == 255) { 951 count = compiledPattern[i++] << 16; 952 count |= compiledPattern[i++]; 953 } 954 955 switch (tag) { 956 case TAG_QUOTE_ASCII_CHAR: 957 toAppendTo.append((char)count); 958 break; 959 960 case TAG_QUOTE_CHARS: 961 toAppendTo.append(compiledPattern, i, count); 962 i += count; 963 break; 964 965 default: 966 subFormat(tag, count, delegate, toAppendTo, useDateFormatSymbols); 967 break; 968 } 969 } 970 return toAppendTo; 971 } 972 973 /** 974 * Formats an Object producing an <code>AttributedCharacterIterator</code>. 975 * You can use the returned <code>AttributedCharacterIterator</code> 976 * to build the resulting String, as well as to determine information 977 * about the resulting String. 978 * <p> 979 * Each attribute key of the AttributedCharacterIterator will be of type 980 * <code>DateFormat.Field</code>, with the corresponding attribute value 981 * being the same as the attribute key. 982 * 983 * @exception NullPointerException if obj is null. 984 * @exception IllegalArgumentException if the Format cannot format the 985 * given object, or if the Format's pattern string is invalid. 986 * @param obj The object to format 987 * @return AttributedCharacterIterator describing the formatted value. 988 * @since 1.4 989 */ 990 @Override 991 public AttributedCharacterIterator formatToCharacterIterator(Object obj) { 992 StringBuffer sb = new StringBuffer(); 993 CharacterIteratorFieldDelegate delegate = new 994 CharacterIteratorFieldDelegate(); 995 996 if (obj instanceof Date) { 997 format((Date)obj, sb, delegate); 998 } 999 else if (obj instanceof Number) { 1000 format(new Date(((Number)obj).longValue()), sb, delegate); 1001 } 1002 else if (obj == null) { 1003 throw new NullPointerException( 1004 "formatToCharacterIterator must be passed non-null object"); 1005 } 1006 else { 1007 throw new IllegalArgumentException( 1008 "Cannot format given Object as a Date"); 1009 } 1010 return delegate.getIterator(sb.toString()); 1011 } 1012 1013 // Map index into pattern character string to Calendar field number 1014 private static final int[] PATTERN_INDEX_TO_CALENDAR_FIELD = { 1015 Calendar.ERA, 1016 Calendar.YEAR, 1017 Calendar.MONTH, 1018 Calendar.DATE, 1019 Calendar.HOUR_OF_DAY, 1020 Calendar.HOUR_OF_DAY, 1021 Calendar.MINUTE, 1022 Calendar.SECOND, 1023 Calendar.MILLISECOND, 1024 Calendar.DAY_OF_WEEK, 1025 Calendar.DAY_OF_YEAR, 1026 Calendar.DAY_OF_WEEK_IN_MONTH, 1027 Calendar.WEEK_OF_YEAR, 1028 Calendar.WEEK_OF_MONTH, 1029 Calendar.AM_PM, 1030 Calendar.HOUR, 1031 Calendar.HOUR, 1032 Calendar.ZONE_OFFSET, 1033 Calendar.ZONE_OFFSET, 1034 CalendarBuilder.WEEK_YEAR, // Pseudo Calendar field 1035 CalendarBuilder.ISO_DAY_OF_WEEK, // Pseudo Calendar field 1036 Calendar.ZONE_OFFSET, 1037 Calendar.MONTH 1038 }; 1039 1040 // Map index into pattern character string to DateFormat field number 1041 private static final int[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD = { 1042 DateFormat.ERA_FIELD, 1043 DateFormat.YEAR_FIELD, 1044 DateFormat.MONTH_FIELD, 1045 DateFormat.DATE_FIELD, 1046 DateFormat.HOUR_OF_DAY1_FIELD, 1047 DateFormat.HOUR_OF_DAY0_FIELD, 1048 DateFormat.MINUTE_FIELD, 1049 DateFormat.SECOND_FIELD, 1050 DateFormat.MILLISECOND_FIELD, 1051 DateFormat.DAY_OF_WEEK_FIELD, 1052 DateFormat.DAY_OF_YEAR_FIELD, 1053 DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD, 1054 DateFormat.WEEK_OF_YEAR_FIELD, 1055 DateFormat.WEEK_OF_MONTH_FIELD, 1056 DateFormat.AM_PM_FIELD, 1057 DateFormat.HOUR1_FIELD, 1058 DateFormat.HOUR0_FIELD, 1059 DateFormat.TIMEZONE_FIELD, 1060 DateFormat.TIMEZONE_FIELD, 1061 DateFormat.YEAR_FIELD, 1062 DateFormat.DAY_OF_WEEK_FIELD, 1063 DateFormat.TIMEZONE_FIELD, 1064 DateFormat.MONTH_FIELD 1065 }; 1066 1067 // Maps from DecimalFormatSymbols index to Field constant 1068 private static final Field[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID = { 1069 Field.ERA, 1070 Field.YEAR, 1071 Field.MONTH, 1072 Field.DAY_OF_MONTH, 1073 Field.HOUR_OF_DAY1, 1074 Field.HOUR_OF_DAY0, 1075 Field.MINUTE, 1076 Field.SECOND, 1077 Field.MILLISECOND, 1078 Field.DAY_OF_WEEK, 1079 Field.DAY_OF_YEAR, 1080 Field.DAY_OF_WEEK_IN_MONTH, 1081 Field.WEEK_OF_YEAR, 1082 Field.WEEK_OF_MONTH, 1083 Field.AM_PM, 1084 Field.HOUR1, 1085 Field.HOUR0, 1086 Field.TIME_ZONE, 1087 Field.TIME_ZONE, 1088 Field.YEAR, 1089 Field.DAY_OF_WEEK, 1090 Field.TIME_ZONE, 1091 Field.MONTH 1092 }; 1093 1094 /** 1095 * Private member function that does the real date/time formatting. 1096 */ 1097 private void subFormat(int patternCharIndex, int count, 1098 FieldDelegate delegate, StringBuffer buffer, 1099 boolean useDateFormatSymbols) 1100 { 1101 int maxIntCount = Integer.MAX_VALUE; 1102 String current = null; 1103 int beginOffset = buffer.length(); 1104 1105 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1106 int value; 1107 if (field == CalendarBuilder.WEEK_YEAR) { 1108 if (calendar.isWeekDateSupported()) { 1109 value = calendar.getWeekYear(); 1110 } else { 1111 // use calendar year 'y' instead 1112 patternCharIndex = PATTERN_YEAR; 1113 field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1114 value = calendar.get(field); 1115 } 1116 } else if (field == CalendarBuilder.ISO_DAY_OF_WEEK) { 1117 value = CalendarBuilder.toISODayOfWeek(calendar.get(Calendar.DAY_OF_WEEK)); 1118 } else { 1119 value = calendar.get(field); 1120 } 1121 1122 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT; 1123 if (!useDateFormatSymbols && field < Calendar.ZONE_OFFSET 1124 && patternCharIndex != PATTERN_MONTH_STANDALONE) { 1125 current = calendar.getDisplayName(field, style, locale); 1126 } 1127 1128 // Note: zeroPaddingNumber() assumes that maxDigits is either 1129 // 2 or maxIntCount. If we make any changes to this, 1130 // zeroPaddingNumber() must be fixed. 1131 1132 switch (patternCharIndex) { 1133 case PATTERN_ERA: // 'G' 1134 if (useDateFormatSymbols) { 1135 String[] eras = formatData.getEras(); 1136 if (value < eras.length) { 1137 current = eras[value]; 1138 } 1139 } 1140 if (current == null) { 1141 current = ""; 1142 } 1143 break; 1144 1145 case PATTERN_WEEK_YEAR: // 'Y' 1146 case PATTERN_YEAR: // 'y' 1147 if (calendar instanceof GregorianCalendar) { 1148 if (count != 2) { 1149 zeroPaddingNumber(value, count, maxIntCount, buffer); 1150 } else { 1151 zeroPaddingNumber(value, 2, 2, buffer); 1152 } // clip 1996 to 96 1153 } else { 1154 if (current == null) { 1155 zeroPaddingNumber(value, style == Calendar.LONG ? 1 : count, 1156 maxIntCount, buffer); 1157 } 1158 } 1159 break; 1160 1161 case PATTERN_MONTH: // 'M' (context seinsive) 1162 if (useDateFormatSymbols) { 1163 String[] months; 1164 if (count >= 4) { 1165 months = formatData.getMonths(); 1166 current = months[value]; 1167 } else if (count == 3) { 1168 months = formatData.getShortMonths(); 1169 current = months[value]; 1170 } 1171 } else { 1172 if (count < 3) { 1173 current = null; 1174 } else if (forceStandaloneForm) { 1175 current = calendar.getDisplayName(field, style | 0x8000, locale); 1176 if (current == null) { 1177 current = calendar.getDisplayName(field, style, locale); 1178 } 1179 } 1180 } 1181 if (current == null) { 1182 zeroPaddingNumber(value+1, count, maxIntCount, buffer); 1183 } 1184 break; 1185 1186 case PATTERN_MONTH_STANDALONE: // 'L' 1187 assert current == null; 1188 if (locale == null) { 1189 String[] months; 1190 if (count >= 4) { 1191 months = formatData.getMonths(); 1192 current = months[value]; 1193 } else if (count == 3) { 1194 months = formatData.getShortMonths(); 1195 current = months[value]; 1196 } 1197 } else { 1198 if (count >= 3) { 1199 current = calendar.getDisplayName(field, style | 0x8000, locale); 1200 } 1201 } 1202 if (current == null) { 1203 zeroPaddingNumber(value+1, count, maxIntCount, buffer); 1204 } 1205 break; 1206 1207 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59 1208 if (current == null) { 1209 if (value == 0) { 1210 zeroPaddingNumber(calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1, 1211 count, maxIntCount, buffer); 1212 } else { 1213 zeroPaddingNumber(value, count, maxIntCount, buffer); 1214 } 1215 } 1216 break; 1217 1218 case PATTERN_DAY_OF_WEEK: // 'E' 1219 if (useDateFormatSymbols) { 1220 String[] weekdays; 1221 if (count >= 4) { 1222 weekdays = formatData.getWeekdays(); 1223 current = weekdays[value]; 1224 } else { // count < 4, use abbreviated form if exists 1225 weekdays = formatData.getShortWeekdays(); 1226 current = weekdays[value]; 1227 } 1228 } 1229 break; 1230 1231 case PATTERN_AM_PM: // 'a' 1232 if (useDateFormatSymbols) { 1233 String[] ampm = formatData.getAmPmStrings(); 1234 current = ampm[value]; 1235 } 1236 break; 1237 1238 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM 1239 if (current == null) { 1240 if (value == 0) { 1241 zeroPaddingNumber(calendar.getLeastMaximum(Calendar.HOUR) + 1, 1242 count, maxIntCount, buffer); 1243 } else { 1244 zeroPaddingNumber(value, count, maxIntCount, buffer); 1245 } 1246 } 1247 break; 1248 1249 case PATTERN_ZONE_NAME: // 'z' 1250 if (current == null) { 1251 if (formatData.locale == null || formatData.isZoneStringsSet) { 1252 int zoneIndex = 1253 formatData.getZoneIndex(calendar.getTimeZone().getID()); 1254 if (zoneIndex == -1) { 1255 value = calendar.get(Calendar.ZONE_OFFSET) + 1256 calendar.get(Calendar.DST_OFFSET); 1257 buffer.append(ZoneInfoFile.toCustomID(value)); 1258 } else { 1259 int index = (calendar.get(Calendar.DST_OFFSET) == 0) ? 1: 3; 1260 if (count < 4) { 1261 // Use the short name 1262 index++; 1263 } 1264 String[][] zoneStrings = formatData.getZoneStringsWrapper(); 1265 buffer.append(zoneStrings[zoneIndex][index]); 1266 } 1267 } else { 1268 TimeZone tz = calendar.getTimeZone(); 1269 boolean daylight = (calendar.get(Calendar.DST_OFFSET) != 0); 1270 int tzstyle = (count < 4 ? TimeZone.SHORT : TimeZone.LONG); 1271 buffer.append(tz.getDisplayName(daylight, tzstyle, formatData.locale)); 1272 } 1273 } 1274 break; 1275 1276 case PATTERN_ZONE_VALUE: // 'Z' ("-/+hhmm" form) 1277 value = (calendar.get(Calendar.ZONE_OFFSET) + 1278 calendar.get(Calendar.DST_OFFSET)) / 60000; 1279 1280 int width = 4; 1281 if (value >= 0) { 1282 buffer.append('+'); 1283 } else { 1284 width++; 1285 } 1286 1287 int num = (value / 60) * 100 + (value % 60); 1288 CalendarUtils.sprintf0d(buffer, num, width); 1289 break; 1290 1291 case PATTERN_ISO_ZONE: // 'X' 1292 value = calendar.get(Calendar.ZONE_OFFSET) 1293 + calendar.get(Calendar.DST_OFFSET); 1294 1295 if (value == 0) { 1296 buffer.append('Z'); 1297 break; 1298 } 1299 1300 value /= 60000; 1301 if (value >= 0) { 1302 buffer.append('+'); 1303 } else { 1304 buffer.append('-'); 1305 value = -value; 1306 } 1307 1308 CalendarUtils.sprintf0d(buffer, value / 60, 2); 1309 if (count == 1) { 1310 break; 1311 } 1312 1313 if (count == 3) { 1314 buffer.append(':'); 1315 } 1316 CalendarUtils.sprintf0d(buffer, value % 60, 2); 1317 break; 1318 1319 default: 1320 // case PATTERN_DAY_OF_MONTH: // 'd' 1321 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59 1322 // case PATTERN_MINUTE: // 'm' 1323 // case PATTERN_SECOND: // 's' 1324 // case PATTERN_MILLISECOND: // 'S' 1325 // case PATTERN_DAY_OF_YEAR: // 'D' 1326 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F' 1327 // case PATTERN_WEEK_OF_YEAR: // 'w' 1328 // case PATTERN_WEEK_OF_MONTH: // 'W' 1329 // case PATTERN_HOUR0: // 'K' eg, 11PM + 1 hour =>> 0 AM 1330 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' pseudo field, Monday = 1, ..., Sunday = 7 1331 if (current == null) { 1332 zeroPaddingNumber(value, count, maxIntCount, buffer); 1333 } 1334 break; 1335 } // switch (patternCharIndex) 1336 1337 if (current != null) { 1338 buffer.append(current); 1339 } 1340 1341 int fieldID = PATTERN_INDEX_TO_DATE_FORMAT_FIELD[patternCharIndex]; 1342 Field f = PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID[patternCharIndex]; 1343 1344 delegate.formatted(fieldID, f, f, beginOffset, buffer.length(), buffer); 1345 } 1346 1347 /** 1348 * Formats a number with the specified minimum and maximum number of digits. 1349 */ 1350 private void zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer) 1351 { 1352 // Optimization for 1, 2 and 4 digit numbers. This should 1353 // cover most cases of formatting date/time related items. 1354 // Note: This optimization code assumes that maxDigits is 1355 // either 2 or Integer.MAX_VALUE (maxIntCount in format()). 1356 try { 1357 if (zeroDigit == 0) { 1358 zeroDigit = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getZeroDigit(); 1359 } 1360 if (value >= 0) { 1361 if (value < 100 && minDigits >= 1 && minDigits <= 2) { 1362 if (value < 10) { 1363 if (minDigits == 2) { 1364 buffer.append(zeroDigit); 1365 } 1366 buffer.append((char)(zeroDigit + value)); 1367 } else { 1368 buffer.append((char)(zeroDigit + value / 10)); 1369 buffer.append((char)(zeroDigit + value % 10)); 1370 } 1371 return; 1372 } else if (value >= 1000 && value < 10000) { 1373 if (minDigits == 4) { 1374 buffer.append((char)(zeroDigit + value / 1000)); 1375 value %= 1000; 1376 buffer.append((char)(zeroDigit + value / 100)); 1377 value %= 100; 1378 buffer.append((char)(zeroDigit + value / 10)); 1379 buffer.append((char)(zeroDigit + value % 10)); 1380 return; 1381 } 1382 if (minDigits == 2 && maxDigits == 2) { 1383 zeroPaddingNumber(value % 100, 2, 2, buffer); 1384 return; 1385 } 1386 } 1387 } 1388 } catch (Exception e) { 1389 } 1390 1391 numberFormat.setMinimumIntegerDigits(minDigits); 1392 numberFormat.setMaximumIntegerDigits(maxDigits); 1393 numberFormat.format((long)value, buffer, DontCareFieldPosition.INSTANCE); 1394 } 1395 1396 1397 /** 1398 * Parses text from a string to produce a <code>Date</code>. 1399 * <p> 1400 * The method attempts to parse text starting at the index given by 1401 * <code>pos</code>. 1402 * If parsing succeeds, then the index of <code>pos</code> is updated 1403 * to the index after the last character used (parsing does not necessarily 1404 * use all characters up to the end of the string), and the parsed 1405 * date is returned. The updated <code>pos</code> can be used to 1406 * indicate the starting point for the next call to this method. 1407 * If an error occurs, then the index of <code>pos</code> is not 1408 * changed, the error index of <code>pos</code> is set to the index of 1409 * the character where the error occurred, and null is returned. 1410 * 1411 * <p>This parsing operation uses the {@link DateFormat#calendar 1412 * calendar} to produce a {@code Date}. All of the {@code 1413 * calendar}'s date-time fields are {@linkplain Calendar#clear() 1414 * cleared} before parsing, and the {@code calendar}'s default 1415 * values of the date-time fields are used for any missing 1416 * date-time information. For example, the year value of the 1417 * parsed {@code Date} is 1970 with {@link GregorianCalendar} if 1418 * no year value is given from the parsing operation. The {@code 1419 * TimeZone} value may be overwritten, depending on the given 1420 * pattern and the time zone value in {@code text}. Any {@code 1421 * TimeZone} value that has previously been set by a call to 1422 * {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need 1423 * to be restored for further operations. 1424 * 1425 * @param text A <code>String</code>, part of which should be parsed. 1426 * @param pos A <code>ParsePosition</code> object with index and error 1427 * index information as described above. 1428 * @return A <code>Date</code> parsed from the string. In case of 1429 * error, returns null. 1430 * @exception NullPointerException if <code>text</code> or <code>pos</code> is null. 1431 */ 1432 @Override 1433 public Date parse(String text, ParsePosition pos) 1434 { 1435 checkNegativeNumberExpression(); 1436 1437 int start = pos.index; 1438 int oldStart = start; 1439 int textLength = text.length(); 1440 1441 boolean[] ambiguousYear = {false}; 1442 1443 CalendarBuilder calb = new CalendarBuilder(); 1444 1445 for (int i = 0; i < compiledPattern.length; ) { 1446 int tag = compiledPattern[i] >>> 8; 1447 int count = compiledPattern[i++] & 0xff; 1448 if (count == 255) { 1449 count = compiledPattern[i++] << 16; 1450 count |= compiledPattern[i++]; 1451 } 1452 1453 switch (tag) { 1454 case TAG_QUOTE_ASCII_CHAR: 1455 if (start >= textLength || text.charAt(start) != (char)count) { 1456 pos.index = oldStart; 1457 pos.errorIndex = start; 1458 return null; 1459 } 1460 start++; 1461 break; 1462 1463 case TAG_QUOTE_CHARS: 1464 while (count-- > 0) { 1465 if (start >= textLength || text.charAt(start) != compiledPattern[i++]) { 1466 pos.index = oldStart; 1467 pos.errorIndex = start; 1468 return null; 1469 } 1470 start++; 1471 } 1472 break; 1473 1474 default: 1475 // Peek the next pattern to determine if we need to 1476 // obey the number of pattern letters for 1477 // parsing. It's required when parsing contiguous 1478 // digit text (e.g., "20010704") with a pattern which 1479 // has no delimiters between fields, like "yyyyMMdd". 1480 boolean obeyCount = false; 1481 1482 // In Arabic, a minus sign for a negative number is put after 1483 // the number. Even in another locale, a minus sign can be 1484 // put after a number using DateFormat.setNumberFormat(). 1485 // If both the minus sign and the field-delimiter are '-', 1486 // subParse() needs to determine whether a '-' after a number 1487 // in the given text is a delimiter or is a minus sign for the 1488 // preceding number. We give subParse() a clue based on the 1489 // information in compiledPattern. 1490 boolean useFollowingMinusSignAsDelimiter = false; 1491 1492 if (i < compiledPattern.length) { 1493 int nextTag = compiledPattern[i] >>> 8; 1494 if (!(nextTag == TAG_QUOTE_ASCII_CHAR || 1495 nextTag == TAG_QUOTE_CHARS)) { 1496 obeyCount = true; 1497 } 1498 1499 if (hasFollowingMinusSign && 1500 (nextTag == TAG_QUOTE_ASCII_CHAR || 1501 nextTag == TAG_QUOTE_CHARS)) { 1502 int c; 1503 if (nextTag == TAG_QUOTE_ASCII_CHAR) { 1504 c = compiledPattern[i] & 0xff; 1505 } else { 1506 c = compiledPattern[i+1]; 1507 } 1508 1509 if (c == minusSign) { 1510 useFollowingMinusSignAsDelimiter = true; 1511 } 1512 } 1513 } 1514 start = subParse(text, start, tag, count, obeyCount, 1515 ambiguousYear, pos, 1516 useFollowingMinusSignAsDelimiter, calb); 1517 if (start < 0) { 1518 pos.index = oldStart; 1519 return null; 1520 } 1521 } 1522 } 1523 1524 // At this point the fields of Calendar have been set. Calendar 1525 // will fill in default values for missing fields when the time 1526 // is computed. 1527 1528 pos.index = start; 1529 1530 Date parsedDate; 1531 try { 1532 parsedDate = calb.establish(calendar).getTime(); 1533 // If the year value is ambiguous, 1534 // then the two-digit year == the default start year 1535 if (ambiguousYear[0]) { 1536 if (parsedDate.before(defaultCenturyStart)) { 1537 parsedDate = calb.addYear(100).establish(calendar).getTime(); 1538 } 1539 } 1540 } 1541 // An IllegalArgumentException will be thrown by Calendar.getTime() 1542 // if any fields are out of range, e.g., MONTH == 17. 1543 catch (IllegalArgumentException e) { 1544 pos.errorIndex = start; 1545 pos.index = oldStart; 1546 return null; 1547 } 1548 1549 return parsedDate; 1550 } 1551 1552 /** 1553 * Private code-size reduction function used by subParse. 1554 * @param text the time text being parsed. 1555 * @param start where to start parsing. 1556 * @param field the date field being parsed. 1557 * @param data the string array to parsed. 1558 * @return the new start position if matching succeeded; a negative number 1559 * indicating matching failure, otherwise. 1560 */ 1561 private int matchString(String text, int start, int field, String[] data, CalendarBuilder calb) 1562 { 1563 int i = 0; 1564 int count = data.length; 1565 1566 if (field == Calendar.DAY_OF_WEEK) { 1567 i = 1; 1568 } 1569 1570 // There may be multiple strings in the data[] array which begin with 1571 // the same prefix (e.g., Cerven and Cervenec (June and July) in Czech). 1572 // We keep track of the longest match, and return that. Note that this 1573 // unfortunately requires us to test all array elements. 1574 int bestMatchLength = 0, bestMatch = -1; 1575 for (; i<count; ++i) 1576 { 1577 int length = data[i].length(); 1578 // Always compare if we have no match yet; otherwise only compare 1579 // against potentially better matches (longer strings). 1580 if (length > bestMatchLength && 1581 text.regionMatches(true, start, data[i], 0, length)) 1582 { 1583 bestMatch = i; 1584 bestMatchLength = length; 1585 } 1586 } 1587 if (bestMatch >= 0) 1588 { 1589 calb.set(field, bestMatch); 1590 return start + bestMatchLength; 1591 } 1592 return -start; 1593 } 1594 1595 /** 1596 * Performs the same thing as matchString(String, int, int, 1597 * String[]). This method takes a Map<String, Integer> instead of 1598 * String[]. 1599 */ 1600 private int matchString(String text, int start, int field, 1601 Map<String,Integer> data, CalendarBuilder calb) { 1602 if (data != null) { 1603 // TODO: make this default when it's in the spec. 1604 if (data instanceof SortedMap) { 1605 for (String name : data.keySet()) { 1606 if (text.regionMatches(true, start, name, 0, name.length())) { 1607 calb.set(field, data.get(name)); 1608 return start + name.length(); 1609 } 1610 } 1611 return -start; 1612 } 1613 1614 String bestMatch = null; 1615 1616 for (String name : data.keySet()) { 1617 int length = name.length(); 1618 if (bestMatch == null || length > bestMatch.length()) { 1619 if (text.regionMatches(true, start, name, 0, length)) { 1620 bestMatch = name; 1621 } 1622 } 1623 } 1624 1625 if (bestMatch != null) { 1626 calb.set(field, data.get(bestMatch)); 1627 return start + bestMatch.length(); 1628 } 1629 } 1630 return -start; 1631 } 1632 1633 private int matchZoneString(String text, int start, String[] zoneNames) { 1634 for (int i = 1; i <= 4; ++i) { 1635 // Checking long and short zones [1 & 2], 1636 // and long and short daylight [3 & 4]. 1637 String zoneName = zoneNames[i]; 1638 if (text.regionMatches(true, start, 1639 zoneName, 0, zoneName.length())) { 1640 return i; 1641 } 1642 } 1643 return -1; 1644 } 1645 1646 private boolean matchDSTString(String text, int start, int zoneIndex, int standardIndex, 1647 String[][] zoneStrings) { 1648 int index = standardIndex + 2; 1649 String zoneName = zoneStrings[zoneIndex][index]; 1650 if (text.regionMatches(true, start, 1651 zoneName, 0, zoneName.length())) { 1652 return true; 1653 } 1654 return false; 1655 } 1656 1657 /** 1658 * find time zone 'text' matched zoneStrings and set to internal 1659 * calendar. 1660 */ 1661 private int subParseZoneString(String text, int start, CalendarBuilder calb) { 1662 boolean useSameName = false; // true if standard and daylight time use the same abbreviation. 1663 TimeZone currentTimeZone = getTimeZone(); 1664 1665 // At this point, check for named time zones by looking through 1666 // the locale data from the TimeZoneNames strings. 1667 // Want to be able to parse both short and long forms. 1668 int zoneIndex = formatData.getZoneIndex(currentTimeZone.getID()); 1669 TimeZone tz = null; 1670 String[][] zoneStrings = formatData.getZoneStringsWrapper(); 1671 String[] zoneNames = null; 1672 int nameIndex = 0; 1673 if (zoneIndex != -1) { 1674 zoneNames = zoneStrings[zoneIndex]; 1675 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1676 if (nameIndex <= 2) { 1677 // Check if the standard name (abbr) and the daylight name are the same. 1678 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1679 } 1680 tz = TimeZone.getTimeZone(zoneNames[0]); 1681 } 1682 } 1683 if (tz == null) { 1684 zoneIndex = formatData.getZoneIndex(TimeZone.getDefault().getID()); 1685 if (zoneIndex != -1) { 1686 zoneNames = zoneStrings[zoneIndex]; 1687 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1688 if (nameIndex <= 2) { 1689 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1690 } 1691 tz = TimeZone.getTimeZone(zoneNames[0]); 1692 } 1693 } 1694 } 1695 1696 if (tz == null) { 1697 int len = zoneStrings.length; 1698 for (int i = 0; i < len; i++) { 1699 zoneNames = zoneStrings[i]; 1700 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { 1701 if (nameIndex <= 2) { 1702 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); 1703 } 1704 tz = TimeZone.getTimeZone(zoneNames[0]); 1705 break; 1706 } 1707 } 1708 } 1709 if (tz != null) { // Matched any ? 1710 if (!tz.equals(currentTimeZone)) { 1711 setTimeZone(tz); 1712 } 1713 // If the time zone matched uses the same name 1714 // (abbreviation) for both standard and daylight time, 1715 // let the time zone in the Calendar decide which one. 1716 // 1717 // Also if tz.getDSTSaving() returns 0 for DST, use tz to 1718 // determine the local time. (6645292) 1719 int dstAmount = (nameIndex >= 3) ? tz.getDSTSavings() : 0; 1720 if (!(useSameName || (nameIndex >= 3 && dstAmount == 0))) { 1721 calb.clear(Calendar.ZONE_OFFSET).set(Calendar.DST_OFFSET, dstAmount); 1722 } 1723 return (start + zoneNames[nameIndex].length()); 1724 } 1725 return 0; 1726 } 1727 1728 /** 1729 * Parses numeric forms of time zone offset, such as "hh:mm", and 1730 * sets calb to the parsed value. 1731 * 1732 * @param text the text to be parsed 1733 * @param start the character position to start parsing 1734 * @param sign 1: positive; -1: negative 1735 * @param count 0: 'Z' or "GMT+hh:mm" parsing; 1 - 3: the number of 'X's 1736 * @param colon true - colon required between hh and mm; false - no colon required 1737 * @param calb a CalendarBuilder in which the parsed value is stored 1738 * @return updated parsed position, or its negative value to indicate a parsing error 1739 */ 1740 private int subParseNumericZone(String text, int start, int sign, int count, 1741 boolean colon, CalendarBuilder calb) { 1742 int index = start; 1743 1744 parse: 1745 try { 1746 char c = text.charAt(index++); 1747 // Parse hh 1748 int hours; 1749 if (!isDigit(c)) { 1750 break parse; 1751 } 1752 hours = c - '0'; 1753 c = text.charAt(index++); 1754 if (isDigit(c)) { 1755 hours = hours * 10 + (c - '0'); 1756 } else { 1757 // If no colon in RFC 822 or 'X' (ISO), two digits are 1758 // required. 1759 if (count > 0 || !colon) { 1760 break parse; 1761 } 1762 --index; 1763 } 1764 if (hours > 23) { 1765 break parse; 1766 } 1767 int minutes = 0; 1768 if (count != 1) { 1769 // Proceed with parsing mm 1770 c = text.charAt(index++); 1771 if (colon) { 1772 if (c != ':') { 1773 break parse; 1774 } 1775 c = text.charAt(index++); 1776 } 1777 if (!isDigit(c)) { 1778 break parse; 1779 } 1780 minutes = c - '0'; 1781 c = text.charAt(index++); 1782 if (!isDigit(c)) { 1783 break parse; 1784 } 1785 minutes = minutes * 10 + (c - '0'); 1786 if (minutes > 59) { 1787 break parse; 1788 } 1789 } 1790 minutes += hours * 60; 1791 calb.set(Calendar.ZONE_OFFSET, minutes * MILLIS_PER_MINUTE * sign) 1792 .set(Calendar.DST_OFFSET, 0); 1793 return index; 1794 } catch (IndexOutOfBoundsException e) { 1795 } 1796 return 1 - index; // -(index - 1) 1797 } 1798 1799 private boolean isDigit(char c) { 1800 return c >= '0' && c <= '9'; 1801 } 1802 1803 /** 1804 * Private member function that converts the parsed date strings into 1805 * timeFields. Returns -start (for ParsePosition) if failed. 1806 * @param text the time text to be parsed. 1807 * @param start where to start parsing. 1808 * @param patternCharIndex the index of the pattern character. 1809 * @param count the count of a pattern character. 1810 * @param obeyCount if true, then the next field directly abuts this one, 1811 * and we should use the count to know when to stop parsing. 1812 * @param ambiguousYear return parameter; upon return, if ambiguousYear[0] 1813 * is true, then a two-digit year was parsed and may need to be readjusted. 1814 * @param origPos origPos.errorIndex is used to return an error index 1815 * at which a parse error occurred, if matching failure occurs. 1816 * @return the new start position if matching succeeded; -1 indicating 1817 * matching failure, otherwise. In case matching failure occurred, 1818 * an error index is set to origPos.errorIndex. 1819 */ 1820 private int subParse(String text, int start, int patternCharIndex, int count, 1821 boolean obeyCount, boolean[] ambiguousYear, 1822 ParsePosition origPos, 1823 boolean useFollowingMinusSignAsDelimiter, CalendarBuilder calb) { 1824 Number number; 1825 int value = 0; 1826 ParsePosition pos = new ParsePosition(0); 1827 pos.index = start; 1828 if (patternCharIndex == PATTERN_WEEK_YEAR && !calendar.isWeekDateSupported()) { 1829 // use calendar year 'y' instead 1830 patternCharIndex = PATTERN_YEAR; 1831 } 1832 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; 1833 1834 // If there are any spaces here, skip over them. If we hit the end 1835 // of the string, then fail. 1836 for (;;) { 1837 if (pos.index >= text.length()) { 1838 origPos.errorIndex = start; 1839 return -1; 1840 } 1841 char c = text.charAt(pos.index); 1842 if (c != ' ' && c != '\t') { 1843 break; 1844 } 1845 ++pos.index; 1846 } 1847 // Remember the actual start index 1848 int actualStart = pos.index; 1849 1850 parsing: 1851 { 1852 // We handle a few special cases here where we need to parse 1853 // a number value. We handle further, more generic cases below. We need 1854 // to handle some of them here because some fields require extra processing on 1855 // the parsed value. 1856 if (patternCharIndex == PATTERN_HOUR_OF_DAY1 || 1857 patternCharIndex == PATTERN_HOUR1 || 1858 (patternCharIndex == PATTERN_MONTH && count <= 2) || 1859 patternCharIndex == PATTERN_YEAR || 1860 patternCharIndex == PATTERN_WEEK_YEAR) { 1861 // It would be good to unify this with the obeyCount logic below, 1862 // but that's going to be difficult. 1863 if (obeyCount) { 1864 if ((start+count) > text.length()) { 1865 break parsing; 1866 } 1867 number = numberFormat.parse(text.substring(0, start+count), pos); 1868 } else { 1869 number = numberFormat.parse(text, pos); 1870 } 1871 if (number == null) { 1872 if (patternCharIndex != PATTERN_YEAR || calendar instanceof GregorianCalendar) { 1873 break parsing; 1874 } 1875 } else { 1876 value = number.intValue(); 1877 1878 if (useFollowingMinusSignAsDelimiter && (value < 0) && 1879 (((pos.index < text.length()) && 1880 (text.charAt(pos.index) != minusSign)) || 1881 ((pos.index == text.length()) && 1882 (text.charAt(pos.index-1) == minusSign)))) { 1883 value = -value; 1884 pos.index--; 1885 } 1886 } 1887 } 1888 1889 boolean useDateFormatSymbols = useDateFormatSymbols(); 1890 1891 int index; 1892 switch (patternCharIndex) { 1893 case PATTERN_ERA: // 'G' 1894 if (useDateFormatSymbols) { 1895 if ((index = matchString(text, start, Calendar.ERA, formatData.getEras(), calb)) > 0) { 1896 return index; 1897 } 1898 } else { 1899 Map<String, Integer> map = getDisplayNamesMap(field, locale); 1900 if ((index = matchString(text, start, field, map, calb)) > 0) { 1901 return index; 1902 } 1903 } 1904 break parsing; 1905 1906 case PATTERN_WEEK_YEAR: // 'Y' 1907 case PATTERN_YEAR: // 'y' 1908 if (!(calendar instanceof GregorianCalendar)) { 1909 // calendar might have text representations for year values, 1910 // such as "\u5143" in JapaneseImperialCalendar. 1911 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT; 1912 Map<String, Integer> map = calendar.getDisplayNames(field, style, locale); 1913 if (map != null) { 1914 if ((index = matchString(text, start, field, map, calb)) > 0) { 1915 return index; 1916 } 1917 } 1918 calb.set(field, value); 1919 return pos.index; 1920 } 1921 1922 // If there are 3 or more YEAR pattern characters, this indicates 1923 // that the year value is to be treated literally, without any 1924 // two-digit year adjustments (e.g., from "01" to 2001). Otherwise 1925 // we made adjustments to place the 2-digit year in the proper 1926 // century, for parsed strings from "00" to "99". Any other string 1927 // is treated literally: "2250", "-1", "1", "002". 1928 if (count <= 2 && (pos.index - actualStart) == 2 1929 && Character.isDigit(text.charAt(actualStart)) 1930 && Character.isDigit(text.charAt(actualStart + 1))) { 1931 // Assume for example that the defaultCenturyStart is 6/18/1903. 1932 // This means that two-digit years will be forced into the range 1933 // 6/18/1903 to 6/17/2003. As a result, years 00, 01, and 02 1934 // correspond to 2000, 2001, and 2002. Years 04, 05, etc. correspond 1935 // to 1904, 1905, etc. If the year is 03, then it is 2003 if the 1936 // other fields specify a date before 6/18, or 1903 if they specify a 1937 // date afterwards. As a result, 03 is an ambiguous year. All other 1938 // two-digit years are unambiguous. 1939 int ambiguousTwoDigitYear = defaultCenturyStartYear % 100; 1940 ambiguousYear[0] = value == ambiguousTwoDigitYear; 1941 value += (defaultCenturyStartYear/100)*100 + 1942 (value < ambiguousTwoDigitYear ? 100 : 0); 1943 } 1944 calb.set(field, value); 1945 return pos.index; 1946 1947 case PATTERN_MONTH: // 'M' 1948 if (count <= 2) // i.e., M or MM. 1949 { 1950 // Don't want to parse the month if it is a string 1951 // while pattern uses numeric style: M or MM. 1952 // [We computed 'value' above.] 1953 calb.set(Calendar.MONTH, value - 1); 1954 return pos.index; 1955 } 1956 1957 if (useDateFormatSymbols) { 1958 // count >= 3 // i.e., MMM or MMMM 1959 // Want to be able to parse both short and long forms. 1960 // Try count == 4 first: 1961 int newStart; 1962 if ((newStart = matchString(text, start, Calendar.MONTH, 1963 formatData.getMonths(), calb)) > 0) { 1964 return newStart; 1965 } 1966 // count == 4 failed, now try count == 3 1967 if ((index = matchString(text, start, Calendar.MONTH, 1968 formatData.getShortMonths(), calb)) > 0) { 1969 return index; 1970 } 1971 } else { 1972 Map<String, Integer> map = getDisplayNamesMap(field, locale); 1973 if ((index = matchString(text, start, field, map, calb)) > 0) { 1974 return index; 1975 } 1976 } 1977 break parsing; 1978 1979 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59 1980 if (!isLenient()) { 1981 // Validate the hour value in non-lenient 1982 if (value < 1 || value > 24) { 1983 break parsing; 1984 } 1985 } 1986 // [We computed 'value' above.] 1987 if (value == calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1) { 1988 value = 0; 1989 } 1990 calb.set(Calendar.HOUR_OF_DAY, value); 1991 return pos.index; 1992 1993 case PATTERN_DAY_OF_WEEK: // 'E' 1994 { 1995 if (useDateFormatSymbols) { 1996 // Want to be able to parse both short and long forms. 1997 // Try count == 4 (DDDD) first: 1998 int newStart; 1999 if ((newStart=matchString(text, start, Calendar.DAY_OF_WEEK, 2000 formatData.getWeekdays(), calb)) > 0) { 2001 return newStart; 2002 } 2003 // DDDD failed, now try DDD 2004 if ((index = matchString(text, start, Calendar.DAY_OF_WEEK, 2005 formatData.getShortWeekdays(), calb)) > 0) { 2006 return index; 2007 } 2008 } else { 2009 int[] styles = { Calendar.LONG, Calendar.SHORT }; 2010 for (int style : styles) { 2011 Map<String,Integer> map = calendar.getDisplayNames(field, style, locale); 2012 if ((index = matchString(text, start, field, map, calb)) > 0) { 2013 return index; 2014 } 2015 } 2016 } 2017 } 2018 break parsing; 2019 2020 case PATTERN_AM_PM: // 'a' 2021 if (useDateFormatSymbols) { 2022 if ((index = matchString(text, start, Calendar.AM_PM, 2023 formatData.getAmPmStrings(), calb)) > 0) { 2024 return index; 2025 } 2026 } else { 2027 Map<String,Integer> map = getDisplayNamesMap(field, locale); 2028 if ((index = matchString(text, start, field, map, calb)) > 0) { 2029 return index; 2030 } 2031 } 2032 break parsing; 2033 2034 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM 2035 if (!isLenient()) { 2036 // Validate the hour value in non-lenient 2037 if (value < 1 || value > 12) { 2038 break parsing; 2039 } 2040 } 2041 // [We computed 'value' above.] 2042 if (value == calendar.getLeastMaximum(Calendar.HOUR) + 1) { 2043 value = 0; 2044 } 2045 calb.set(Calendar.HOUR, value); 2046 return pos.index; 2047 2048 case PATTERN_ZONE_NAME: // 'z' 2049 case PATTERN_ZONE_VALUE: // 'Z' 2050 { 2051 int sign = 0; 2052 try { 2053 char c = text.charAt(pos.index); 2054 if (c == '+') { 2055 sign = 1; 2056 } else if (c == '-') { 2057 sign = -1; 2058 } 2059 if (sign == 0) { 2060 // Try parsing a custom time zone "GMT+hh:mm" or "GMT". 2061 if ((c == 'G' || c == 'g') 2062 && (text.length() - start) >= GMT.length() 2063 && text.regionMatches(true, start, GMT, 0, GMT.length())) { 2064 pos.index = start + GMT.length(); 2065 2066 if ((text.length() - pos.index) > 0) { 2067 c = text.charAt(pos.index); 2068 if (c == '+') { 2069 sign = 1; 2070 } else if (c == '-') { 2071 sign = -1; 2072 } 2073 } 2074 2075 if (sign == 0) { /* "GMT" without offset */ 2076 calb.set(Calendar.ZONE_OFFSET, 0) 2077 .set(Calendar.DST_OFFSET, 0); 2078 return pos.index; 2079 } 2080 2081 // Parse the rest as "hh:mm" 2082 int i = subParseNumericZone(text, ++pos.index, 2083 sign, 0, true, calb); 2084 if (i > 0) { 2085 return i; 2086 } 2087 pos.index = -i; 2088 } else { 2089 // Try parsing the text as a time zone 2090 // name or abbreviation. 2091 int i = subParseZoneString(text, pos.index, calb); 2092 if (i > 0) { 2093 return i; 2094 } 2095 pos.index = -i; 2096 } 2097 } else { 2098 // Parse the rest as "hhmm" (RFC 822) 2099 int i = subParseNumericZone(text, ++pos.index, 2100 sign, 0, false, calb); 2101 if (i > 0) { 2102 return i; 2103 } 2104 pos.index = -i; 2105 } 2106 } catch (IndexOutOfBoundsException e) { 2107 } 2108 } 2109 break parsing; 2110 2111 case PATTERN_ISO_ZONE: // 'X' 2112 { 2113 if ((text.length() - pos.index) <= 0) { 2114 break parsing; 2115 } 2116 2117 int sign; 2118 char c = text.charAt(pos.index); 2119 if (c == 'Z') { 2120 calb.set(Calendar.ZONE_OFFSET, 0).set(Calendar.DST_OFFSET, 0); 2121 return ++pos.index; 2122 } 2123 2124 // parse text as "+/-hh[[:]mm]" based on count 2125 if (c == '+') { 2126 sign = 1; 2127 } else if (c == '-') { 2128 sign = -1; 2129 } else { 2130 ++pos.index; 2131 break parsing; 2132 } 2133 int i = subParseNumericZone(text, ++pos.index, sign, count, 2134 count == 3, calb); 2135 if (i > 0) { 2136 return i; 2137 } 2138 pos.index = -i; 2139 } 2140 break parsing; 2141 2142 default: 2143 // case PATTERN_DAY_OF_MONTH: // 'd' 2144 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59 2145 // case PATTERN_MINUTE: // 'm' 2146 // case PATTERN_SECOND: // 's' 2147 // case PATTERN_MILLISECOND: // 'S' 2148 // case PATTERN_DAY_OF_YEAR: // 'D' 2149 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F' 2150 // case PATTERN_WEEK_OF_YEAR: // 'w' 2151 // case PATTERN_WEEK_OF_MONTH: // 'W' 2152 // case PATTERN_HOUR0: // 'K' 0-based. eg, 11PM + 1 hour =>> 0 AM 2153 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' (pseudo field); 2154 2155 // Handle "generic" fields 2156 if (obeyCount) { 2157 if ((start+count) > text.length()) { 2158 break parsing; 2159 } 2160 number = numberFormat.parse(text.substring(0, start+count), pos); 2161 } else { 2162 number = numberFormat.parse(text, pos); 2163 } 2164 if (number != null) { 2165 value = number.intValue(); 2166 2167 if (useFollowingMinusSignAsDelimiter && (value < 0) && 2168 (((pos.index < text.length()) && 2169 (text.charAt(pos.index) != minusSign)) || 2170 ((pos.index == text.length()) && 2171 (text.charAt(pos.index-1) == minusSign)))) { 2172 value = -value; 2173 pos.index--; 2174 } 2175 2176 calb.set(field, value); 2177 return pos.index; 2178 } 2179 break parsing; 2180 } 2181 } 2182 2183 // Parsing failed. 2184 origPos.errorIndex = pos.index; 2185 return -1; 2186 } 2187 2188 /** 2189 * Returns true if the DateFormatSymbols has been set explicitly or locale 2190 * is null. 2191 */ 2192 private boolean useDateFormatSymbols() { 2193 return useDateFormatSymbols || locale == null; 2194 } 2195 2196 /** 2197 * Translates a pattern, mapping each character in the from string to the 2198 * corresponding character in the to string. 2199 * 2200 * @exception IllegalArgumentException if the given pattern is invalid 2201 */ 2202 private String translatePattern(String pattern, String from, String to) { 2203 StringBuilder result = new StringBuilder(); 2204 boolean inQuote = false; 2205 for (int i = 0; i < pattern.length(); ++i) { 2206 char c = pattern.charAt(i); 2207 if (inQuote) { 2208 if (c == '\'') { 2209 inQuote = false; 2210 } 2211 } 2212 else { 2213 if (c == '\'') { 2214 inQuote = true; 2215 } else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) { 2216 int ci = from.indexOf(c); 2217 if (ci >= 0) { 2218 // patternChars is longer than localPatternChars due 2219 // to serialization compatibility. The pattern letters 2220 // unsupported by localPatternChars pass through. 2221 if (ci < to.length()) { 2222 c = to.charAt(ci); 2223 } 2224 } else { 2225 throw new IllegalArgumentException("Illegal pattern " + 2226 " character '" + 2227 c + "'"); 2228 } 2229 } 2230 } 2231 result.append(c); 2232 } 2233 if (inQuote) { 2234 throw new IllegalArgumentException("Unfinished quote in pattern"); 2235 } 2236 return result.toString(); 2237 } 2238 2239 /** 2240 * Returns a pattern string describing this date format. 2241 * 2242 * @return a pattern string describing this date format. 2243 */ 2244 public String toPattern() { 2245 return pattern; 2246 } 2247 2248 /** 2249 * Returns a localized pattern string describing this date format. 2250 * 2251 * @return a localized pattern string describing this date format. 2252 */ 2253 public String toLocalizedPattern() { 2254 return translatePattern(pattern, 2255 DateFormatSymbols.patternChars, 2256 formatData.getLocalPatternChars()); 2257 } 2258 2259 /** 2260 * Applies the given pattern string to this date format. 2261 * 2262 * @param pattern the new date and time pattern for this date format 2263 * @exception NullPointerException if the given pattern is null 2264 * @exception IllegalArgumentException if the given pattern is invalid 2265 */ 2266 public void applyPattern(String pattern) 2267 { 2268 applyPatternImpl(pattern); 2269 } 2270 2271 private void applyPatternImpl(String pattern) { 2272 compiledPattern = compile(pattern); 2273 this.pattern = pattern; 2274 } 2275 2276 /** 2277 * Applies the given localized pattern string to this date format. 2278 * 2279 * @param pattern a String to be mapped to the new date and time format 2280 * pattern for this format 2281 * @exception NullPointerException if the given pattern is null 2282 * @exception IllegalArgumentException if the given pattern is invalid 2283 */ 2284 public void applyLocalizedPattern(String pattern) { 2285 String p = translatePattern(pattern, 2286 formatData.getLocalPatternChars(), 2287 DateFormatSymbols.patternChars); 2288 compiledPattern = compile(p); 2289 this.pattern = p; 2290 } 2291 2292 /** 2293 * Gets a copy of the date and time format symbols of this date format. 2294 * 2295 * @return the date and time format symbols of this date format 2296 * @see #setDateFormatSymbols 2297 */ 2298 public DateFormatSymbols getDateFormatSymbols() 2299 { 2300 return (DateFormatSymbols)formatData.clone(); 2301 } 2302 2303 /** 2304 * Sets the date and time format symbols of this date format. 2305 * 2306 * @param newFormatSymbols the new date and time format symbols 2307 * @exception NullPointerException if the given newFormatSymbols is null 2308 * @see #getDateFormatSymbols 2309 */ 2310 public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols) 2311 { 2312 this.formatData = (DateFormatSymbols)newFormatSymbols.clone(); 2313 useDateFormatSymbols = true; 2314 } 2315 2316 /** 2317 * Creates a copy of this <code>SimpleDateFormat</code>. This also 2318 * clones the format's date format symbols. 2319 * 2320 * @return a clone of this <code>SimpleDateFormat</code> 2321 */ 2322 @Override 2323 public Object clone() { 2324 SimpleDateFormat other = (SimpleDateFormat) super.clone(); 2325 other.formatData = (DateFormatSymbols) formatData.clone(); 2326 return other; 2327 } 2328 2329 /** 2330 * Returns the hash code value for this <code>SimpleDateFormat</code> object. 2331 * 2332 * @return the hash code value for this <code>SimpleDateFormat</code> object. 2333 */ 2334 @Override 2335 public int hashCode() 2336 { 2337 return pattern.hashCode(); 2338 // just enough fields for a reasonable distribution 2339 } 2340 2341 /** 2342 * Compares the given object with this <code>SimpleDateFormat</code> for 2343 * equality. 2344 * 2345 * @return true if the given object is equal to this 2346 * <code>SimpleDateFormat</code> 2347 */ 2348 @Override 2349 public boolean equals(Object obj) 2350 { 2351 if (!super.equals(obj)) { 2352 return false; // super does class check 2353 } 2354 SimpleDateFormat that = (SimpleDateFormat) obj; 2355 return (pattern.equals(that.pattern) 2356 && formatData.equals(that.formatData)); 2357 } 2358 2359 private static final int[] REST_OF_STYLES = { 2360 Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT, Calendar.LONG_STANDALONE, 2361 }; 2362 private Map<String, Integer> getDisplayNamesMap(int field, Locale locale) { 2363 Map<String, Integer> map = calendar.getDisplayNames(field, Calendar.SHORT_FORMAT, locale); 2364 // Get all SHORT and LONG styles (avoid NARROW styles). 2365 for (int style : REST_OF_STYLES) { 2366 Map<String, Integer> m = calendar.getDisplayNames(field, style, locale); 2367 if (m != null) { 2368 map.putAll(m); 2369 } 2370 } 2371 return map; 2372 } 2373 2374 /** 2375 * After reading an object from the input stream, the format 2376 * pattern in the object is verified. 2377 * 2378 * @exception InvalidObjectException if the pattern is invalid 2379 */ 2380 private void readObject(ObjectInputStream stream) 2381 throws IOException, ClassNotFoundException { 2382 stream.defaultReadObject(); 2383 2384 try { 2385 compiledPattern = compile(pattern); 2386 } catch (Exception e) { 2387 throw new InvalidObjectException("invalid pattern"); 2388 } 2389 2390 if (serialVersionOnStream < 1) { 2391 // didn't have defaultCenturyStart field 2392 initializeDefaultCentury(); 2393 } 2394 else { 2395 // fill in dependent transient field 2396 parseAmbiguousDatesAsAfter(defaultCenturyStart); 2397 } 2398 serialVersionOnStream = currentSerialVersion; 2399 2400 // If the deserialized object has a SimpleTimeZone, try 2401 // to replace it with a ZoneInfo equivalent in order to 2402 // be compatible with the SimpleTimeZone-based 2403 // implementation as much as possible. 2404 TimeZone tz = getTimeZone(); 2405 if (tz instanceof SimpleTimeZone) { 2406 String id = tz.getID(); 2407 TimeZone zi = TimeZone.getTimeZone(id); 2408 if (zi != null && zi.hasSameRules(tz) && zi.getID().equals(id)) { 2409 setTimeZone(zi); 2410 } 2411 } 2412 } 2413 2414 /** 2415 * Analyze the negative subpattern of DecimalFormat and set/update values 2416 * as necessary. 2417 */ 2418 private void checkNegativeNumberExpression() { 2419 if ((numberFormat instanceof DecimalFormat) && 2420 !numberFormat.equals(originalNumberFormat)) { 2421 String numberPattern = ((DecimalFormat)numberFormat).toPattern(); 2422 if (!numberPattern.equals(originalNumberPattern)) { 2423 hasFollowingMinusSign = false; 2424 2425 int separatorIndex = numberPattern.indexOf(';'); 2426 // If the negative subpattern is not absent, we have to analayze 2427 // it in order to check if it has a following minus sign. 2428 if (separatorIndex > -1) { 2429 int minusIndex = numberPattern.indexOf('-', separatorIndex); 2430 if ((minusIndex > numberPattern.lastIndexOf('0')) && 2431 (minusIndex > numberPattern.lastIndexOf('#'))) { 2432 hasFollowingMinusSign = true; 2433 minusSign = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getMinusSign(); 2434 } 2435 } 2436 originalNumberPattern = numberPattern; 2437 } 2438 originalNumberFormat = numberFormat; 2439 } 2440 } 2441 2442} 2443