1 /*
2 * Copyright (c) 1996, 2012, 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.TimeZone;
52 import java.util.concurrent.ConcurrentHashMap;
53 import java.util.concurrent.ConcurrentMap;
54 import sun.util.locale.provider.LocaleProviderAdapter;
55 import sun.util.calendar.CalendarUtils;
56 import sun.util.calendar.ZoneInfoFile;
57
58 /**
59 * <code>SimpleDateFormat</code> is a concrete class for formatting and
60 * parsing dates in a locale-sensitive manner. It allows for formatting
61 * (date -> text), parsing (text -> date), and normalization.
62 *
63 * <p>
64 * <code>SimpleDateFormat</code> allows you to start by choosing
65 * any user-defined patterns for date-time formatting. However, you
66 * are encouraged to create a date-time formatter with either
67 * <code>getTimeInstance</code>, <code>getDateInstance</code>, or
68 * <code>getDateTimeInstance</code> in <code>DateFormat</code>. Each
69 * of these class methods can return a date/time formatter initialized
70 * with a default format pattern. You may modify the format pattern
71 * using the <code>applyPattern</code> methods as desired.
72 * For more information on using these methods, see
73 * {@link DateFormat}.
74 *
75 * <h4>Date and Time Patterns</h4>
76 * <p>
77 * Date and time formats are specified by <em>date and time pattern</em>
78 * strings.
79 * Within date and time pattern strings, unquoted letters from
80 * <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to
81 * <code>'z'</code> are interpreted as pattern letters representing the
82 * components of a date or time string.
83 * Text can be quoted using single quotes (<code>'</code>) to avoid
84 * interpretation.
85 * <code>"''"</code> represents a single quote.
86 * All other characters are not interpreted; they're simply copied into the
87 * output string during formatting or matched against the input string
88 * during parsing.
89 * <p>
90 * The following pattern letters are defined (all other characters from
91 * <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to
92 * <code>'z'</code> are reserved):
93 * <blockquote>
94 * <table border=0 cellspacing=3 cellpadding=0 summary="Chart shows pattern letters, date/time component, presentation, and examples.">
95 * <tr bgcolor="#ccccff">
96 * <th align=left>Letter
97 * <th align=left>Date or Time Component
98 * <th align=left>Presentation
99 * <th align=left>Examples
100 * <tr>
101 * <td><code>G</code>
102 * <td>Era designator
103 * <td><a href="#text">Text</a>
104 * <td><code>AD</code>
105 * <tr bgcolor="#eeeeff">
106 * <td><code>y</code>
107 * <td>Year
108 * <td><a href="#year">Year</a>
109 * <td><code>1996</code>; <code>96</code>
110 * <tr>
111 * <td><code>Y</code>
112 * <td>Week year
113 * <td><a href="#year">Year</a>
114 * <td><code>2009</code>; <code>09</code>
115 * <tr bgcolor="#eeeeff">
116 * <td><code>M</code>
117 * <td>Month in year (context sensitive)
118 * <td><a href="#month">Month</a>
119 * <td><code>July</code>; <code>Jul</code>; <code>07</code>
120 * <tr>
121 * <td><code>L</code>
122 * <td>Month in year (standalone form)
123 * <td><a href="#month">Month</a>
124 * <td><code>July</code>; <code>Jul</code>; <code>07</code>
125 * <tr bgcolor="#eeeeff">
126 * <td><code>w</code>
127 * <td>Week in year
128 * <td><a href="#number">Number</a>
129 * <td><code>27</code>
130 * <tr>
131 * <td><code>W</code>
132 * <td>Week in month
133 * <td><a href="#number">Number</a>
134 * <td><code>2</code>
135 * <tr bgcolor="#eeeeff">
136 * <td><code>D</code>
137 * <td>Day in year
138 * <td><a href="#number">Number</a>
139 * <td><code>189</code>
140 * <tr>
141 * <td><code>d</code>
142 * <td>Day in month
143 * <td><a href="#number">Number</a>
144 * <td><code>10</code>
145 * <tr bgcolor="#eeeeff">
146 * <td><code>F</code>
147 * <td>Day of week in month
148 * <td><a href="#number">Number</a>
149 * <td><code>2</code>
150 * <tr>
151 * <td><code>E</code>
152 * <td>Day name in week
153 * <td><a href="#text">Text</a>
154 * <td><code>Tuesday</code>; <code>Tue</code>
155 * <tr bgcolor="#eeeeff">
156 * <td><code>u</code>
157 * <td>Day number of week (1 = Monday, ..., 7 = Sunday)
158 * <td><a href="#number">Number</a>
159 * <td><code>1</code>
160 * <tr>
161 * <td><code>a</code>
162 * <td>Am/pm marker
163 * <td><a href="#text">Text</a>
164 * <td><code>PM</code>
165 * <tr bgcolor="#eeeeff">
166 * <td><code>H</code>
167 * <td>Hour in day (0-23)
168 * <td><a href="#number">Number</a>
169 * <td><code>0</code>
170 * <tr>
171 * <td><code>k</code>
172 * <td>Hour in day (1-24)
173 * <td><a href="#number">Number</a>
174 * <td><code>24</code>
175 * <tr bgcolor="#eeeeff">
176 * <td><code>K</code>
177 * <td>Hour in am/pm (0-11)
178 * <td><a href="#number">Number</a>
179 * <td><code>0</code>
180 * <tr>
181 * <td><code>h</code>
182 * <td>Hour in am/pm (1-12)
183 * <td><a href="#number">Number</a>
184 * <td><code>12</code>
185 * <tr bgcolor="#eeeeff">
186 * <td><code>m</code>
187 * <td>Minute in hour
188 * <td><a href="#number">Number</a>
189 * <td><code>30</code>
190 * <tr>
191 * <td><code>s</code>
192 * <td>Second in minute
193 * <td><a href="#number">Number</a>
194 * <td><code>55</code>
195 * <tr bgcolor="#eeeeff">
196 * <td><code>S</code>
197 * <td>Millisecond
198 * <td><a href="#number">Number</a>
199 * <td><code>978</code>
200 * <tr>
201 * <td><code>z</code>
202 * <td>Time zone
203 * <td><a href="#timezone">General time zone</a>
204 * <td><code>Pacific Standard Time</code>; <code>PST</code>; <code>GMT-08:00</code>
205 * <tr bgcolor="#eeeeff">
206 * <td><code>Z</code>
207 * <td>Time zone
208 * <td><a href="#rfc822timezone">RFC 822 time zone</a>
209 * <td><code>-0800</code>
210 * <tr>
211 * <td><code>X</code>
212 * <td>Time zone
213 * <td><a href="#iso8601timezone">ISO 8601 time zone</a>
214 * <td><code>-08</code>; <code>-0800</code>; <code>-08:00</code>
215 * </table>
216 * </blockquote>
217 * Pattern letters are usually repeated, as their number determines the
218 * exact presentation:
219 * <ul>
220 * <li><strong><a name="text">Text:</a></strong>
221 * For formatting, if the number of pattern letters is 4 or more,
222 * the full form is used; otherwise a short or abbreviated form
223 * is used if available.
224 * For parsing, both forms are accepted, independent of the number
225 * of pattern letters.<br><br></li>
226 * <li><strong><a name="number">Number:</a></strong>
227 * For formatting, the number of pattern letters is the minimum
228 * number of digits, and shorter numbers are zero-padded to this amount.
229 * For parsing, the number of pattern letters is ignored unless
230 * it's needed to separate two adjacent fields.<br><br></li>
231 * <li><strong><a name="year">Year:</a></strong>
232 * If the formatter's {@link #getCalendar() Calendar} is the Gregorian
233 * calendar, the following rules are applied.<br>
234 * <ul>
235 * <li>For formatting, if the number of pattern letters is 2, the year
236 * is truncated to 2 digits; otherwise it is interpreted as a
237 * <a href="#number">number</a>.
238 * <li>For parsing, if the number of pattern letters is more than 2,
239 * the year is interpreted literally, regardless of the number of
240 * digits. So using the pattern "MM/dd/yyyy", "01/11/12" parses to
241 * Jan 11, 12 A.D.
242 * <li>For parsing with the abbreviated year pattern ("y" or "yy"),
243 * <code>SimpleDateFormat</code> must interpret the abbreviated year
244 * relative to some century. It does this by adjusting dates to be
245 * within 80 years before and 20 years after the time the <code>SimpleDateFormat</code>
246 * instance is created. For example, using a pattern of "MM/dd/yy" and a
247 * <code>SimpleDateFormat</code> instance created on Jan 1, 1997, the string
248 * "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64"
249 * would be interpreted as May 4, 1964.
250 * During parsing, only strings consisting of exactly two digits, as defined by
251 * {@link Character#isDigit(char)}, will be parsed into the default century.
252 * Any other numeric string, such as a one digit string, a three or more digit
253 * string, or a two digit string that isn't all digits (for example, "-1"), is
254 * interpreted literally. So "01/02/3" or "01/02/003" are parsed, using the
255 * same pattern, as Jan 2, 3 AD. Likewise, "01/02/-3" is parsed as Jan 2, 4 BC.
256 * </ul>
257 * Otherwise, calendar system specific forms are applied.
258 * For both formatting and parsing, if the number of pattern
259 * letters is 4 or more, a calendar specific {@linkplain
260 * Calendar#LONG long form} is used. Otherwise, a calendar
261 * specific {@linkplain Calendar#SHORT short or abbreviated form}
262 * is used.<br>
263 * <br>
264 * If week year {@code 'Y'} is specified and the {@linkplain
265 * #getCalendar() calendar} doesn't support any <a
266 * href="../util/GregorianCalendar.html#week_year"> week
267 * years</a>, the calendar year ({@code 'y'}) is used instead. The
268 * support of week years can be tested with a call to {@link
269 * DateFormat#getCalendar() getCalendar()}.{@link
270 * java.util.Calendar#isWeekDateSupported()
271 * isWeekDateSupported()}.<br><br></li>
272 * <li><strong><a name="month">Month:</a></strong>
273 * If the number of pattern letters is 3 or more, the month is
274 * interpreted as <a href="#text">text</a>; otherwise,
275 * it is interpreted as a <a href="#number">number</a>.<br>
276 * <ul>
277 * <li>Letter <em>M</em> produces context-sensitive month names, such as the
278 * embedded form of names. If a {@code DateFormatSymbols} has been set
279 * explicitly with constructor {@link #SimpleDateFormat(String,
280 * DateFormatSymbols)} or method {@link
281 * #setDateFormatSymbols(DateFormatSymbols)}, the month names given by
282 * the {@code DateFormatSymbols} are used.</li>
283 * <li>Letter <em>L</em> produces the standalone form of month names.</li>
284 * </ul>
285 * <br></li>
286 * <li><strong><a name="timezone">General time zone:</a></strong>
287 * Time zones are interpreted as <a href="#text">text</a> if they have
288 * names. For time zones representing a GMT offset value, the
289 * following syntax is used:
290 * <pre>
291 * <a name="GMTOffsetTimeZone"><i>GMTOffsetTimeZone:</i></a>
292 * <code>GMT</code> <i>Sign</i> <i>Hours</i> <code>:</code> <i>Minutes</i>
293 * <i>Sign:</i> one of
294 * <code>+ -</code>
295 * <i>Hours:</i>
296 * <i>Digit</i>
297 * <i>Digit</i> <i>Digit</i>
298 * <i>Minutes:</i>
299 * <i>Digit</i> <i>Digit</i>
300 * <i>Digit:</i> one of
301 * <code>0 1 2 3 4 5 6 7 8 9</code></pre>
302 * <i>Hours</i> must be between 0 and 23, and <i>Minutes</i> must be between
303 * 00 and 59. The format is locale independent and digits must be taken
304 * from the Basic Latin block of the Unicode standard.
305 * <p>For parsing, <a href="#rfc822timezone">RFC 822 time zones</a> are also
306 * accepted.<br><br></li>
307 * <li><strong><a name="rfc822timezone">RFC 822 time zone:</a></strong>
308 * For formatting, the RFC 822 4-digit time zone format is used:
309 *
310 * <pre>
311 * <i>RFC822TimeZone:</i>
312 * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i>
313 * <i>TwoDigitHours:</i>
314 * <i>Digit Digit</i></pre>
315 * <i>TwoDigitHours</i> must be between 00 and 23. Other definitions
316 * are as for <a href="#timezone">general time zones</a>.
317 *
318 * <p>For parsing, <a href="#timezone">general time zones</a> are also
319 * accepted.
320 * <li><strong><a name="iso8601timezone">ISO 8601 Time zone:</a></strong>
321 * The number of pattern letters designates the format for both formatting
322 * and parsing as follows:
323 * <pre>
324 * <i>ISO8601TimeZone:</i>
325 * <i>OneLetterISO8601TimeZone</i>
326 * <i>TwoLetterISO8601TimeZone</i>
327 * <i>ThreeLetterISO8601TimeZone</i>
328 * <i>OneLetterISO8601TimeZone:</i>
329 * <i>Sign</i> <i>TwoDigitHours</i>
330 * {@code Z}
331 * <i>TwoLetterISO8601TimeZone:</i>
332 * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i>
333 * {@code Z}
334 * <i>ThreeLetterISO8601TimeZone:</i>
335 * <i>Sign</i> <i>TwoDigitHours</i> {@code :} <i>Minutes</i>
336 * {@code Z}</pre>
337 * Other definitions are as for <a href="#timezone">general time zones</a> or
338 * <a href="#rfc822timezone">RFC 822 time zones</a>.
339 *
340 * <p>For formatting, if the offset value from GMT is 0, {@code "Z"} is
341 * produced. If the number of pattern letters is 1, any fraction of an hour
342 * is ignored. For example, if the pattern is {@code "X"} and the time zone is
343 * {@code "GMT+05:30"}, {@code "+05"} is produced.
344 *
345 * <p>For parsing, {@code "Z"} is parsed as the UTC time zone designator.
346 * <a href="#timezone">General time zones</a> are <em>not</em> accepted.
347 *
348 * <p>If the number of pattern letters is 4 or more, {@link
349 * IllegalArgumentException} is thrown when constructing a {@code
350 * SimpleDateFormat} or {@linkplain #applyPattern(String) applying a
351 * pattern}.
352 * </ul>
353 * <code>SimpleDateFormat</code> also supports <em>localized date and time
354 * pattern</em> strings. In these strings, the pattern letters described above
355 * may be replaced with other, locale dependent, pattern letters.
356 * <code>SimpleDateFormat</code> does not deal with the localization of text
357 * other than the pattern letters; that's up to the client of the class.
358 * <p>
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 bgcolor="#ccccff">
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 bgcolor="#eeeeff">
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 bgcolor="#eeeeff">
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 bgcolor="#eeeeff">
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 bgcolor="#eeeeff">
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 bgcolor="#eeeeff">
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://java.sun.com/docs/books/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 */
421 public 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 JDK1.1.4
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 transient private NumberFormat originalNumberFormat;
460 transient private String originalNumberPattern;
461
462 /**
463 * The minus sign to be used with format and parse.
464 */
465 transient private char minusSign = '-';
466
467 /**
468 * True when a negative sign follows a number.
469 * (True as default in Arabic.)
470 */
471 transient private boolean hasFollowingMinusSign = false;
472
473 /**
474 * True if standalone form needs to be used.
475 */
476 transient private boolean forceStandaloneForm = false;
477
478 /**
479 * The compiled pattern.
480 */
481 transient private char[] compiledPattern;
482
483 /**
484 * Tags for the compiled pattern.
485 */
486 private final static int TAG_QUOTE_ASCII_CHAR = 100;
487 private final static int TAG_QUOTE_CHARS = 101;
488
489 /**
490 * Locale dependent digit zero.
491 * @see #zeroPaddingNumber
492 * @see java.text.DecimalFormatSymbols#getZeroDigit
493 */
494 transient private 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 JDK1.1.4
510 */
511 private Date defaultCenturyStart;
512
513 transient private 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 locale.
550 * <b>Note:</b> This constructor may not support all locales.
551 * For full coverage, use the factory methods in the {@link DateFormat}
552 * class.
553 */
554 public SimpleDateFormat() {
555 this("", Locale.getDefault(Locale.Category.FORMAT));
556 applyPatternImpl(LocaleProviderAdapter.getResourceBundleBased().getLocaleResources(locale)
557 .getDateTimePattern(SHORT, SHORT, calendar));
558 }
559
560 /**
561 * Constructs a <code>SimpleDateFormat</code> using the given pattern and
562 * the default date format symbols for the default locale.
563 * <b>Note:</b> This constructor may not support all locales.
564 * For full coverage, use the factory methods in the {@link DateFormat}
565 * class.
566 *
567 * @param pattern the pattern describing the date and time format
568 * @exception NullPointerException if the given pattern is null
569 * @exception IllegalArgumentException if the given pattern is invalid
570 */
571 public SimpleDateFormat(String pattern)
572 {
573 this(pattern, Locale.getDefault(Locale.Category.FORMAT));
574 }
575
576 /**
577 * Constructs a <code>SimpleDateFormat</code> using the given pattern and
578 * the default date format symbols for the given locale.
579 * <b>Note:</b> This constructor may not support all locales.
580 * For full coverage, use the factory methods in the {@link DateFormat}
581 * class.
582 *
583 * @param pattern the pattern describing the date and time format
584 * @param locale the locale whose date format symbols should be used
585 * @exception NullPointerException if the given pattern or locale is null
586 * @exception IllegalArgumentException if the given pattern is invalid
587 */
588 public SimpleDateFormat(String pattern, Locale locale)
589 {
590 if (pattern == null || locale == null) {
591 throw new NullPointerException();
592 }
593
594 initializeCalendar(locale);
595 this.pattern = pattern;
596 this.formatData = DateFormatSymbols.getInstanceRef(locale);
597 this.locale = locale;
598 initialize(locale);
599 }
600
601 /**
602 * Constructs a <code>SimpleDateFormat</code> using the given pattern and
603 * date format symbols.
604 *
605 * @param pattern the pattern describing the date and time format
606 * @param formatSymbols the date format symbols to be used for formatting
607 * @exception NullPointerException if the given pattern or formatSymbols is null
608 * @exception IllegalArgumentException if the given pattern is invalid
609 */
610 public SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols)
611 {
612 if (pattern == null || formatSymbols == null) {
613 throw new NullPointerException();
614 }
615
616 this.pattern = pattern;
617 this.formatData = (DateFormatSymbols) formatSymbols.clone();
618 this.locale = Locale.getDefault(Locale.Category.FORMAT);
619 initializeCalendar(this.locale);
620 initialize(this.locale);
621 useDateFormatSymbols = true;
622 }
623
624 /* Initialize compiledPattern and numberFormat fields */
625 private void initialize(Locale loc) {
626 // Verify and compile the given pattern.
627 compiledPattern = compile(pattern);
628
629 /* try the cache first */
630 numberFormat = cachedNumberFormatData.get(loc);
631 if (numberFormat == null) { /* cache miss */
632 numberFormat = NumberFormat.getIntegerInstance(loc);
633 numberFormat.setGroupingUsed(false);
634
635 /* update cache */
636 cachedNumberFormatData.putIfAbsent(loc, numberFormat);
637 }
638 numberFormat = (NumberFormat) numberFormat.clone();
639
640 initializeDefaultCentury();
641 }
642
643 private void initializeCalendar(Locale loc) {
644 if (calendar == null) {
645 assert loc != null;
646 // The format object must be constructed using the symbols for this zone.
647 // However, the calendar should use the current default TimeZone.
648 // If this is not contained in the locale zone strings, then the zone
649 // will be formatted using generic GMT+/-H:MM nomenclature.
650 calendar = Calendar.getInstance(TimeZone.getDefault(), loc);
651 }
652 }
653
654 /**
655 * Returns the compiled form of the given pattern. The syntax of
656 * the compiled pattern is:
657 * <blockquote>
658 * CompiledPattern:
659 * EntryList
660 * EntryList:
661 * Entry
662 * EntryList Entry
663 * Entry:
664 * TagField
665 * TagField data
666 * TagField:
667 * Tag Length
668 * TaggedData
669 * Tag:
670 * pattern_char_index
671 * TAG_QUOTE_CHARS
672 * Length:
673 * short_length
674 * long_length
675 * TaggedData:
676 * TAG_QUOTE_ASCII_CHAR ascii_char
677 *
678 * </blockquote>
679 *
680 * where `short_length' is an 8-bit unsigned integer between 0 and
681 * 254. `long_length' is a sequence of an 8-bit integer 255 and a
682 * 32-bit signed integer value which is split into upper and lower
683 * 16-bit fields in two char's. `pattern_char_index' is an 8-bit
684 * integer between 0 and 18. `ascii_char' is an 7-bit ASCII
685 * character value. `data' depends on its Tag value.
686 * <p>
687 * If Length is short_length, Tag and short_length are packed in a
688 * single char, as illustrated below.
689 * <blockquote>
690 * char[0] = (Tag << 8) | short_length;
691 * </blockquote>
692 *
693 * If Length is long_length, Tag and 255 are packed in the first
694 * char and a 32-bit integer, as illustrated below.
695 * <blockquote>
696 * char[0] = (Tag << 8) | 255;
697 * char[1] = (char) (long_length >>> 16);
698 * char[2] = (char) (long_length & 0xffff);
699 * </blockquote>
700 * <p>
701 * If Tag is a pattern_char_index, its Length is the number of
702 * pattern characters. For example, if the given pattern is
703 * "yyyy", Tag is 1 and Length is 4, followed by no data.
704 * <p>
705 * If Tag is TAG_QUOTE_CHARS, its Length is the number of char's
706 * following the TagField. For example, if the given pattern is
707 * "'o''clock'", Length is 7 followed by a char sequence of
708 * <code>o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k</code>.
709 * <p>
710 * TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII
711 * character in place of Length. For example, if the given pattern
712 * is "'o'", the TaggedData entry is
713 * <code>((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o')</code>.
714 *
715 * @exception NullPointerException if the given pattern is null
716 * @exception IllegalArgumentException if the given pattern is invalid
717 */
718 private char[] compile(String pattern) {
719 int length = pattern.length();
720 boolean inQuote = false;
721 StringBuilder compiledCode = new StringBuilder(length * 2);
722 StringBuilder tmpBuffer = null;
723 int count = 0, tagcount = 0;
724 int lastTag = -1, prevTag = -1;
725
726 for (int i = 0; i < length; i++) {
727 char c = pattern.charAt(i);
728
729 if (c == '\'') {
730 // '' is treated as a single quote regardless of being
731 // in a quoted section.
732 if ((i + 1) < length) {
733 c = pattern.charAt(i + 1);
734 if (c == '\'') {
735 i++;
736 if (count != 0) {
737 encode(lastTag, count, compiledCode);
738 tagcount++;
739 prevTag = lastTag;
740 lastTag = -1;
741 count = 0;
742 }
743 if (inQuote) {
744 tmpBuffer.append(c);
745 } else {
746 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c));
747 }
748 continue;
749 }
750 }
751 if (!inQuote) {
752 if (count != 0) {
753 encode(lastTag, count, compiledCode);
754 tagcount++;
755 prevTag = lastTag;
756 lastTag = -1;
757 count = 0;
758 }
759 if (tmpBuffer == null) {
760 tmpBuffer = new StringBuilder(length);
761 } else {
762 tmpBuffer.setLength(0);
763 }
764 inQuote = true;
765 } else {
766 int len = tmpBuffer.length();
767 if (len == 1) {
768 char ch = tmpBuffer.charAt(0);
769 if (ch < 128) {
770 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | ch));
771 } else {
772 compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | 1));
773 compiledCode.append(ch);
774 }
775 } else {
776 encode(TAG_QUOTE_CHARS, len, compiledCode);
777 compiledCode.append(tmpBuffer);
778 }
779 inQuote = false;
780 }
781 continue;
782 }
783 if (inQuote) {
784 tmpBuffer.append(c);
785 continue;
786 }
787 if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')) {
788 if (count != 0) {
789 encode(lastTag, count, compiledCode);
790 tagcount++;
791 prevTag = lastTag;
792 lastTag = -1;
793 count = 0;
794 }
795 if (c < 128) {
796 // In most cases, c would be a delimiter, such as ':'.
797 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c));
798 } else {
799 // Take any contiguous non-ASCII alphabet characters and
800 // put them in a single TAG_QUOTE_CHARS.
801 int j;
802 for (j = i + 1; j < length; j++) {
803 char d = pattern.charAt(j);
804 if (d == '\'' || (d >= 'a' && d <= 'z' || d >= 'A' && d <= 'Z')) {
805 break;
806 }
807 }
808 compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | (j - i)));
809 for (; i < j; i++) {
810 compiledCode.append(pattern.charAt(i));
811 }
812 i--;
813 }
814 continue;
815 }
816
817 int tag;
818 if ((tag = DateFormatSymbols.patternChars.indexOf(c)) == -1) {
819 throw new IllegalArgumentException("Illegal pattern character " +
820 "'" + c + "'");
821 }
822 if (lastTag == -1 || lastTag == tag) {
823 lastTag = tag;
824 count++;
825 continue;
826 }
827 encode(lastTag, count, compiledCode);
828 tagcount++;
829 prevTag = lastTag;
830 lastTag = tag;
831 count = 1;
832 }
833
834 if (inQuote) {
835 throw new IllegalArgumentException("Unterminated quote");
836 }
837
838 if (count != 0) {
839 encode(lastTag, count, compiledCode);
840 tagcount++;
841 prevTag = lastTag;
842 }
843
844 forceStandaloneForm = (tagcount == 1 && prevTag == PATTERN_MONTH);
845
846 // Copy the compiled pattern to a char array
847 int len = compiledCode.length();
848 char[] r = new char[len];
849 compiledCode.getChars(0, len, r, 0);
850 return r;
851 }
852
853 /**
854 * Encodes the given tag and length and puts encoded char(s) into buffer.
855 */
856 private static void encode(int tag, int length, StringBuilder buffer) {
857 if (tag == PATTERN_ISO_ZONE && length >= 4) {
858 throw new IllegalArgumentException("invalid ISO 8601 format: length=" + length);
859 }
860 if (length < 255) {
861 buffer.append((char)(tag << 8 | length));
862 } else {
863 buffer.append((char)((tag << 8) | 0xff));
864 buffer.append((char)(length >>> 16));
865 buffer.append((char)(length & 0xffff));
866 }
867 }
868
869 /* Initialize the fields we use to disambiguate ambiguous years. Separate
870 * so we can call it from readObject().
871 */
872 private void initializeDefaultCentury() {
873 calendar.setTimeInMillis(System.currentTimeMillis());
874 calendar.add( Calendar.YEAR, -80 );
875 parseAmbiguousDatesAsAfter(calendar.getTime());
876 }
877
878 /* Define one-century window into which to disambiguate dates using
879 * two-digit years.
880 */
881 private void parseAmbiguousDatesAsAfter(Date startDate) {
882 defaultCenturyStart = startDate;
883 calendar.setTime(startDate);
884 defaultCenturyStartYear = calendar.get(Calendar.YEAR);
885 }
886
887 /**
888 * Sets the 100-year period 2-digit years will be interpreted as being in
889 * to begin on the date the user specifies.
890 *
891 * @param startDate During parsing, two digit years will be placed in the range
892 * <code>startDate</code> to <code>startDate + 100 years</code>.
893 * @see #get2DigitYearStart
894 * @since 1.2
895 */
896 public void set2DigitYearStart(Date startDate) {
897 parseAmbiguousDatesAsAfter(new Date(startDate.getTime()));
898 }
899
900 /**
901 * Returns the beginning date of the 100-year period 2-digit years are interpreted
902 * as being within.
903 *
904 * @return the start of the 100-year period into which two digit years are
905 * parsed
906 * @see #set2DigitYearStart
907 * @since 1.2
908 */
909 public Date get2DigitYearStart() {
910 return (Date) defaultCenturyStart.clone();
911 }
912
913 /**
914 * Formats the given <code>Date</code> into a date/time string and appends
915 * the result to the given <code>StringBuffer</code>.
916 *
917 * @param date the date-time value to be formatted into a date-time string.
918 * @param toAppendTo where the new date-time text is to be appended.
919 * @param pos the formatting position. On input: an alignment field,
920 * if desired. On output: the offsets of the alignment field.
921 * @return the formatted date-time string.
922 * @exception NullPointerException if the given {@code date} is {@code null}.
923 */
924 @Override
925 public StringBuffer format(Date date, StringBuffer toAppendTo,
926 FieldPosition pos)
927 {
928 pos.beginIndex = pos.endIndex = 0;
929 return format(date, toAppendTo, pos.getFieldDelegate());
930 }
931
932 // Called from Format after creating a FieldDelegate
933 private StringBuffer format(Date date, StringBuffer toAppendTo,
934 FieldDelegate delegate) {
935 // Convert input date to time field list
936 calendar.setTime(date);
937
938 boolean useDateFormatSymbols = useDateFormatSymbols();
939
940 for (int i = 0; i < compiledPattern.length; ) {
941 int tag = compiledPattern[i] >>> 8;
942 int count = compiledPattern[i++] & 0xff;
943 if (count == 255) {
944 count = compiledPattern[i++] << 16;
945 count |= compiledPattern[i++];
946 }
947
948 switch (tag) {
949 case TAG_QUOTE_ASCII_CHAR:
950 toAppendTo.append((char)count);
951 break;
952
953 case TAG_QUOTE_CHARS:
954 toAppendTo.append(compiledPattern, i, count);
955 i += count;
956 break;
957
958 default:
959 subFormat(tag, count, delegate, toAppendTo, useDateFormatSymbols);
960 break;
961 }
962 }
963 return toAppendTo;
964 }
965
966 /**
967 * Formats an Object producing an <code>AttributedCharacterIterator</code>.
968 * You can use the returned <code>AttributedCharacterIterator</code>
969 * to build the resulting String, as well as to determine information
970 * about the resulting String.
971 * <p>
972 * Each attribute key of the AttributedCharacterIterator will be of type
973 * <code>DateFormat.Field</code>, with the corresponding attribute value
974 * being the same as the attribute key.
975 *
976 * @exception NullPointerException if obj is null.
977 * @exception IllegalArgumentException if the Format cannot format the
978 * given object, or if the Format's pattern string is invalid.
979 * @param obj The object to format
980 * @return AttributedCharacterIterator describing the formatted value.
981 * @since 1.4
982 */
983 @Override
984 public AttributedCharacterIterator formatToCharacterIterator(Object obj) {
985 StringBuffer sb = new StringBuffer();
986 CharacterIteratorFieldDelegate delegate = new
987 CharacterIteratorFieldDelegate();
988
989 if (obj instanceof Date) {
990 format((Date)obj, sb, delegate);
991 }
992 else if (obj instanceof Number) {
993 format(new Date(((Number)obj).longValue()), sb, delegate);
994 }
995 else if (obj == null) {
996 throw new NullPointerException(
997 "formatToCharacterIterator must be passed non-null object");
998 }
999 else {
1000 throw new IllegalArgumentException(
1001 "Cannot format given Object as a Date");
1002 }
1003 return delegate.getIterator(sb.toString());
1004 }
1005
1006 // Map index into pattern character string to Calendar field number
1007 private static final int[] PATTERN_INDEX_TO_CALENDAR_FIELD = {
1008 Calendar.ERA,
1009 Calendar.YEAR,
1010 Calendar.MONTH,
1011 Calendar.DATE,
1012 Calendar.HOUR_OF_DAY,
1013 Calendar.HOUR_OF_DAY,
1014 Calendar.MINUTE,
1015 Calendar.SECOND,
1016 Calendar.MILLISECOND,
1017 Calendar.DAY_OF_WEEK,
1018 Calendar.DAY_OF_YEAR,
1019 Calendar.DAY_OF_WEEK_IN_MONTH,
1020 Calendar.WEEK_OF_YEAR,
1021 Calendar.WEEK_OF_MONTH,
1022 Calendar.AM_PM,
1023 Calendar.HOUR,
1024 Calendar.HOUR,
1025 Calendar.ZONE_OFFSET,
1026 Calendar.ZONE_OFFSET,
1027 CalendarBuilder.WEEK_YEAR, // Pseudo Calendar field
1028 CalendarBuilder.ISO_DAY_OF_WEEK, // Pseudo Calendar field
1029 Calendar.ZONE_OFFSET,
1030 Calendar.MONTH
1031 };
1032
1033 // Map index into pattern character string to DateFormat field number
1034 private static final int[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD = {
1035 DateFormat.ERA_FIELD,
1036 DateFormat.YEAR_FIELD,
1037 DateFormat.MONTH_FIELD,
1038 DateFormat.DATE_FIELD,
1039 DateFormat.HOUR_OF_DAY1_FIELD,
1040 DateFormat.HOUR_OF_DAY0_FIELD,
1041 DateFormat.MINUTE_FIELD,
1042 DateFormat.SECOND_FIELD,
1043 DateFormat.MILLISECOND_FIELD,
1044 DateFormat.DAY_OF_WEEK_FIELD,
1045 DateFormat.DAY_OF_YEAR_FIELD,
1046 DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD,
1047 DateFormat.WEEK_OF_YEAR_FIELD,
1048 DateFormat.WEEK_OF_MONTH_FIELD,
1049 DateFormat.AM_PM_FIELD,
1050 DateFormat.HOUR1_FIELD,
1051 DateFormat.HOUR0_FIELD,
1052 DateFormat.TIMEZONE_FIELD,
1053 DateFormat.TIMEZONE_FIELD,
1054 DateFormat.YEAR_FIELD,
1055 DateFormat.DAY_OF_WEEK_FIELD,
1056 DateFormat.TIMEZONE_FIELD,
1057 DateFormat.MONTH_FIELD
1058 };
1059
1060 // Maps from DecimalFormatSymbols index to Field constant
1061 private static final Field[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID = {
1062 Field.ERA,
1063 Field.YEAR,
1064 Field.MONTH,
1065 Field.DAY_OF_MONTH,
1066 Field.HOUR_OF_DAY1,
1067 Field.HOUR_OF_DAY0,
1068 Field.MINUTE,
1069 Field.SECOND,
1070 Field.MILLISECOND,
1071 Field.DAY_OF_WEEK,
1072 Field.DAY_OF_YEAR,
1073 Field.DAY_OF_WEEK_IN_MONTH,
1074 Field.WEEK_OF_YEAR,
1075 Field.WEEK_OF_MONTH,
1076 Field.AM_PM,
1077 Field.HOUR1,
1078 Field.HOUR0,
1079 Field.TIME_ZONE,
1080 Field.TIME_ZONE,
1081 Field.YEAR,
1082 Field.DAY_OF_WEEK,
1083 Field.TIME_ZONE,
1084 Field.MONTH
1085 };
1086
1087 /**
1088 * Private member function that does the real date/time formatting.
1089 */
1090 private void subFormat(int patternCharIndex, int count,
1091 FieldDelegate delegate, StringBuffer buffer,
1092 boolean useDateFormatSymbols)
1093 {
1094 int maxIntCount = Integer.MAX_VALUE;
1095 String current = null;
1096 int beginOffset = buffer.length();
1097
1098 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1099 int value;
1100 if (field == CalendarBuilder.WEEK_YEAR) {
1101 if (calendar.isWeekDateSupported()) {
1102 value = calendar.getWeekYear();
1103 } else {
1104 // use calendar year 'y' instead
1105 patternCharIndex = PATTERN_YEAR;
1106 field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1107 value = calendar.get(field);
1108 }
1109 } else if (field == CalendarBuilder.ISO_DAY_OF_WEEK) {
1110 value = CalendarBuilder.toISODayOfWeek(calendar.get(Calendar.DAY_OF_WEEK));
1111 } else {
1112 value = calendar.get(field);
1113 }
1114
1115 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT;
1116 if (!useDateFormatSymbols && field < Calendar.ZONE_OFFSET
1117 && patternCharIndex != PATTERN_MONTH_STANDALONE) {
1118 current = calendar.getDisplayName(field, style, locale);
1119 }
1120
1121 // Note: zeroPaddingNumber() assumes that maxDigits is either
1122 // 2 or maxIntCount. If we make any changes to this,
1123 // zeroPaddingNumber() must be fixed.
1124
1125 switch (patternCharIndex) {
1126 case PATTERN_ERA: // 'G'
1127 if (useDateFormatSymbols) {
1128 String[] eras = formatData.getEras();
1129 if (value < eras.length) {
1130 current = eras[value];
1131 }
1132 }
1133 if (current == null) {
1134 current = "";
1135 }
1136 break;
1137
1138 case PATTERN_WEEK_YEAR: // 'Y'
1139 case PATTERN_YEAR: // 'y'
1140 if (calendar instanceof GregorianCalendar) {
1141 if (count != 2) {
1142 zeroPaddingNumber(value, count, maxIntCount, buffer);
1143 } else {
1144 zeroPaddingNumber(value, 2, 2, buffer);
1145 } // clip 1996 to 96
1146 } else {
1147 if (current == null) {
1148 zeroPaddingNumber(value, style == Calendar.LONG ? 1 : count,
1149 maxIntCount, buffer);
1150 }
1151 }
1152 break;
1153
1154 case PATTERN_MONTH: // 'M' (context seinsive)
1155 if (useDateFormatSymbols) {
1156 String[] months;
1157 if (count >= 4) {
1158 months = formatData.getMonths();
1159 current = months[value];
1160 } else if (count == 3) {
1161 months = formatData.getShortMonths();
1162 current = months[value];
1163 }
1164 } else {
1165 if (count < 3) {
1166 current = null;
1167 } else if (forceStandaloneForm) {
1168 current = calendar.getDisplayName(field, style | 0x8000, locale);
1169 if (current == null) {
1170 current = calendar.getDisplayName(field, style, locale);
1171 }
1172 }
1173 }
1174 if (current == null) {
1175 zeroPaddingNumber(value+1, count, maxIntCount, buffer);
1176 }
1177 break;
1178
1179 case PATTERN_MONTH_STANDALONE: // 'L'
1180 assert current == null;
1181 if (locale == null) {
1182 String[] months;
1183 if (count >= 4) {
1184 months = formatData.getMonths();
1185 current = months[value];
1186 } else if (count == 3) {
1187 months = formatData.getShortMonths();
1188 current = months[value];
1189 }
1190 } else {
1191 if (count >= 3) {
1192 current = calendar.getDisplayName(field, style | 0x8000, locale);
1193 }
1194 }
1195 if (current == null) {
1196 zeroPaddingNumber(value+1, count, maxIntCount, buffer);
1197 }
1198 break;
1199
1200 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59
1201 if (current == null) {
1202 if (value == 0) {
1203 zeroPaddingNumber(calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1,
1204 count, maxIntCount, buffer);
1205 } else {
1206 zeroPaddingNumber(value, count, maxIntCount, buffer);
1207 }
1208 }
1209 break;
1210
1211 case PATTERN_DAY_OF_WEEK: // 'E'
1212 if (useDateFormatSymbols) {
1213 String[] weekdays;
1214 if (count >= 4) {
1215 weekdays = formatData.getWeekdays();
1216 current = weekdays[value];
1217 } else { // count < 4, use abbreviated form if exists
1218 weekdays = formatData.getShortWeekdays();
1219 current = weekdays[value];
1220 }
1221 }
1222 break;
1223
1224 case PATTERN_AM_PM: // 'a'
1225 if (useDateFormatSymbols) {
1226 String[] ampm = formatData.getAmPmStrings();
1227 current = ampm[value];
1228 }
1229 break;
1230
1231 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM
1232 if (current == null) {
1233 if (value == 0) {
1234 zeroPaddingNumber(calendar.getLeastMaximum(Calendar.HOUR) + 1,
1235 count, maxIntCount, buffer);
1236 } else {
1237 zeroPaddingNumber(value, count, maxIntCount, buffer);
1238 }
1239 }
1240 break;
1241
1242 case PATTERN_ZONE_NAME: // 'z'
1243 if (current == null) {
1244 if (formatData.locale == null || formatData.isZoneStringsSet) {
1245 int zoneIndex =
1246 formatData.getZoneIndex(calendar.getTimeZone().getID());
1247 if (zoneIndex == -1) {
1248 value = calendar.get(Calendar.ZONE_OFFSET) +
1249 calendar.get(Calendar.DST_OFFSET);
1250 buffer.append(ZoneInfoFile.toCustomID(value));
1251 } else {
1252 int index = (calendar.get(Calendar.DST_OFFSET) == 0) ? 1: 3;
1253 if (count < 4) {
1254 // Use the short name
1255 index++;
1256 }
1257 String[][] zoneStrings = formatData.getZoneStringsWrapper();
1258 buffer.append(zoneStrings[zoneIndex][index]);
1259 }
1260 } else {
1261 TimeZone tz = calendar.getTimeZone();
1262 boolean daylight = (calendar.get(Calendar.DST_OFFSET) != 0);
1263 int tzstyle = (count < 4 ? TimeZone.SHORT : TimeZone.LONG);
1264 buffer.append(tz.getDisplayName(daylight, tzstyle, formatData.locale));
1265 }
1266 }
1267 break;
1268
1269 case PATTERN_ZONE_VALUE: // 'Z' ("-/+hhmm" form)
1270 value = (calendar.get(Calendar.ZONE_OFFSET) +
1271 calendar.get(Calendar.DST_OFFSET)) / 60000;
1272
1273 int width = 4;
1274 if (value >= 0) {
1275 buffer.append('+');
1276 } else {
1277 width++;
1278 }
1279
1280 int num = (value / 60) * 100 + (value % 60);
1281 CalendarUtils.sprintf0d(buffer, num, width);
1282 break;
1283
1284 case PATTERN_ISO_ZONE: // 'X'
1285 value = calendar.get(Calendar.ZONE_OFFSET)
1286 + calendar.get(Calendar.DST_OFFSET);
1287
1288 if (value == 0) {
1289 buffer.append('Z');
1290 break;
1291 }
1292
1293 value /= 60000;
1294 if (value >= 0) {
1295 buffer.append('+');
1296 } else {
1297 buffer.append('-');
1298 value = -value;
1299 }
1300
1301 CalendarUtils.sprintf0d(buffer, value / 60, 2);
1302 if (count == 1) {
1303 break;
1304 }
1305
1306 if (count == 3) {
1307 buffer.append(':');
1308 }
1309 CalendarUtils.sprintf0d(buffer, value % 60, 2);
1310 break;
1311
1312 default:
1313 // case PATTERN_DAY_OF_MONTH: // 'd'
1314 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59
1315 // case PATTERN_MINUTE: // 'm'
1316 // case PATTERN_SECOND: // 's'
1317 // case PATTERN_MILLISECOND: // 'S'
1318 // case PATTERN_DAY_OF_YEAR: // 'D'
1319 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F'
1320 // case PATTERN_WEEK_OF_YEAR: // 'w'
1321 // case PATTERN_WEEK_OF_MONTH: // 'W'
1322 // case PATTERN_HOUR0: // 'K' eg, 11PM + 1 hour =>> 0 AM
1323 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' pseudo field, Monday = 1, ..., Sunday = 7
1324 if (current == null) {
1325 zeroPaddingNumber(value, count, maxIntCount, buffer);
1326 }
1327 break;
1328 } // switch (patternCharIndex)
1329
1330 if (current != null) {
1331 buffer.append(current);
1332 }
1333
1334 int fieldID = PATTERN_INDEX_TO_DATE_FORMAT_FIELD[patternCharIndex];
1335 Field f = PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID[patternCharIndex];
1336
1337 delegate.formatted(fieldID, f, f, beginOffset, buffer.length(), buffer);
1338 }
1339
1340 /**
1341 * Formats a number with the specified minimum and maximum number of digits.
1342 */
1343 private void zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer)
1344 {
1345 // Optimization for 1, 2 and 4 digit numbers. This should
1346 // cover most cases of formatting date/time related items.
1347 // Note: This optimization code assumes that maxDigits is
1348 // either 2 or Integer.MAX_VALUE (maxIntCount in format()).
1349 try {
1350 if (zeroDigit == 0) {
1351 zeroDigit = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getZeroDigit();
1352 }
1353 if (value >= 0) {
1354 if (value < 100 && minDigits >= 1 && minDigits <= 2) {
1355 if (value < 10) {
1356 if (minDigits == 2) {
1357 buffer.append(zeroDigit);
1358 }
1359 buffer.append((char)(zeroDigit + value));
1360 } else {
1361 buffer.append((char)(zeroDigit + value / 10));
1362 buffer.append((char)(zeroDigit + value % 10));
1363 }
1364 return;
1365 } else if (value >= 1000 && value < 10000) {
1366 if (minDigits == 4) {
1367 buffer.append((char)(zeroDigit + value / 1000));
1368 value %= 1000;
1369 buffer.append((char)(zeroDigit + value / 100));
1370 value %= 100;
1371 buffer.append((char)(zeroDigit + value / 10));
1372 buffer.append((char)(zeroDigit + value % 10));
1373 return;
1374 }
1375 if (minDigits == 2 && maxDigits == 2) {
1376 zeroPaddingNumber(value % 100, 2, 2, buffer);
1377 return;
1378 }
1379 }
1380 }
1381 } catch (Exception e) {
1382 }
1383
1384 numberFormat.setMinimumIntegerDigits(minDigits);
1385 numberFormat.setMaximumIntegerDigits(maxDigits);
1386 numberFormat.format((long)value, buffer, DontCareFieldPosition.INSTANCE);
1387 }
1388
1389
1390 /**
1391 * Parses text from a string to produce a <code>Date</code>.
1392 * <p>
1393 * The method attempts to parse text starting at the index given by
1394 * <code>pos</code>.
1395 * If parsing succeeds, then the index of <code>pos</code> is updated
1396 * to the index after the last character used (parsing does not necessarily
1397 * use all characters up to the end of the string), and the parsed
1398 * date is returned. The updated <code>pos</code> can be used to
1399 * indicate the starting point for the next call to this method.
1400 * If an error occurs, then the index of <code>pos</code> is not
1401 * changed, the error index of <code>pos</code> is set to the index of
1402 * the character where the error occurred, and null is returned.
1403 *
1404 * <p>This parsing operation uses the {@link DateFormat#calendar
1405 * calendar} to produce a {@code Date}. All of the {@code
1406 * calendar}'s date-time fields are {@linkplain Calendar#clear()
1407 * cleared} before parsing, and the {@code calendar}'s default
1408 * values of the date-time fields are used for any missing
1409 * date-time information. For example, the year value of the
1410 * parsed {@code Date} is 1970 with {@link GregorianCalendar} if
1411 * no year value is given from the parsing operation. The {@code
1412 * TimeZone} value may be overwritten, depending on the given
1413 * pattern and the time zone value in {@code text}. Any {@code
1414 * TimeZone} value that has previously been set by a call to
1415 * {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need
1416 * to be restored for further operations.
1417 *
1418 * @param text A <code>String</code>, part of which should be parsed.
1419 * @param pos A <code>ParsePosition</code> object with index and error
1420 * index information as described above.
1421 * @return A <code>Date</code> parsed from the string. In case of
1422 * error, returns null.
1423 * @exception NullPointerException if <code>text</code> or <code>pos</code> is null.
1424 */
1425 @Override
1426 public Date parse(String text, ParsePosition pos)
1427 {
1428 checkNegativeNumberExpression();
1429
1430 int start = pos.index;
1431 int oldStart = start;
1432 int textLength = text.length();
1433
1434 boolean[] ambiguousYear = {false};
1435
1436 CalendarBuilder calb = new CalendarBuilder();
1437
1438 for (int i = 0; i < compiledPattern.length; ) {
1439 int tag = compiledPattern[i] >>> 8;
1440 int count = compiledPattern[i++] & 0xff;
1441 if (count == 255) {
1442 count = compiledPattern[i++] << 16;
1443 count |= compiledPattern[i++];
1444 }
1445
1446 switch (tag) {
1447 case TAG_QUOTE_ASCII_CHAR:
1448 if (start >= textLength || text.charAt(start) != (char)count) {
1449 pos.index = oldStart;
1450 pos.errorIndex = start;
1451 return null;
1452 }
1453 start++;
1454 break;
1455
1456 case TAG_QUOTE_CHARS:
1457 while (count-- > 0) {
1458 if (start >= textLength || text.charAt(start) != compiledPattern[i++]) {
1459 pos.index = oldStart;
1460 pos.errorIndex = start;
1461 return null;
1462 }
1463 start++;
1464 }
1465 break;
1466
1467 default:
1468 // Peek the next pattern to determine if we need to
1469 // obey the number of pattern letters for
1470 // parsing. It's required when parsing contiguous
1471 // digit text (e.g., "20010704") with a pattern which
1472 // has no delimiters between fields, like "yyyyMMdd".
1473 boolean obeyCount = false;
1474
1475 // In Arabic, a minus sign for a negative number is put after
1476 // the number. Even in another locale, a minus sign can be
1477 // put after a number using DateFormat.setNumberFormat().
1478 // If both the minus sign and the field-delimiter are '-',
1479 // subParse() needs to determine whether a '-' after a number
1480 // in the given text is a delimiter or is a minus sign for the
1481 // preceding number. We give subParse() a clue based on the
1482 // information in compiledPattern.
1483 boolean useFollowingMinusSignAsDelimiter = false;
1484
1485 if (i < compiledPattern.length) {
1486 int nextTag = compiledPattern[i] >>> 8;
1487 if (!(nextTag == TAG_QUOTE_ASCII_CHAR ||
1488 nextTag == TAG_QUOTE_CHARS)) {
1489 obeyCount = true;
1490 }
1491
1492 if (hasFollowingMinusSign &&
1493 (nextTag == TAG_QUOTE_ASCII_CHAR ||
1494 nextTag == TAG_QUOTE_CHARS)) {
1495 int c;
1496 if (nextTag == TAG_QUOTE_ASCII_CHAR) {
1497 c = compiledPattern[i] & 0xff;
1498 } else {
1499 c = compiledPattern[i+1];
1500 }
1501
1502 if (c == minusSign) {
1503 useFollowingMinusSignAsDelimiter = true;
1504 }
1505 }
1506 }
1507 start = subParse(text, start, tag, count, obeyCount,
1508 ambiguousYear, pos,
1509 useFollowingMinusSignAsDelimiter, calb);
1510 if (start < 0) {
1511 pos.index = oldStart;
1512 return null;
1513 }
1514 }
1515 }
1516
1517 // At this point the fields of Calendar have been set. Calendar
1518 // will fill in default values for missing fields when the time
1519 // is computed.
1520
1521 pos.index = start;
1522
1523 Date parsedDate;
1524 try {
1525 parsedDate = calb.establish(calendar).getTime();
1526 // If the year value is ambiguous,
1527 // then the two-digit year == the default start year
1528 if (ambiguousYear[0]) {
1529 if (parsedDate.before(defaultCenturyStart)) {
1530 parsedDate = calb.addYear(100).establish(calendar).getTime();
1531 }
1532 }
1533 }
1534 // An IllegalArgumentException will be thrown by Calendar.getTime()
1535 // if any fields are out of range, e.g., MONTH == 17.
1536 catch (IllegalArgumentException e) {
1537 pos.errorIndex = start;
1538 pos.index = oldStart;
1539 return null;
1540 }
1541
1542 return parsedDate;
1543 }
1544
1545 /**
1546 * Private code-size reduction function used by subParse.
1547 * @param text the time text being parsed.
1548 * @param start where to start parsing.
1549 * @param field the date field being parsed.
1550 * @param data the string array to parsed.
1551 * @return the new start position if matching succeeded; a negative number
1552 * indicating matching failure, otherwise.
1553 */
1554 private int matchString(String text, int start, int field, String[] data, CalendarBuilder calb)
1555 {
1556 int i = 0;
1557 int count = data.length;
1558
1559 if (field == Calendar.DAY_OF_WEEK) {
1560 i = 1;
1561 }
1562
1563 // There may be multiple strings in the data[] array which begin with
1564 // the same prefix (e.g., Cerven and Cervenec (June and July) in Czech).
1565 // We keep track of the longest match, and return that. Note that this
1566 // unfortunately requires us to test all array elements.
1567 int bestMatchLength = 0, bestMatch = -1;
1568 for (; i<count; ++i)
1569 {
1570 int length = data[i].length();
1571 // Always compare if we have no match yet; otherwise only compare
1572 // against potentially better matches (longer strings).
1573 if (length > bestMatchLength &&
1574 text.regionMatches(true, start, data[i], 0, length))
1575 {
1576 bestMatch = i;
1577 bestMatchLength = length;
1578 }
1579 }
1580 if (bestMatch >= 0)
1581 {
1582 calb.set(field, bestMatch);
1583 return start + bestMatchLength;
1584 }
1585 return -start;
1586 }
1587
1588 /**
1589 * Performs the same thing as matchString(String, int, int,
1590 * String[]). This method takes a Map<String, Integer> instead of
1591 * String[].
1592 */
1593 private int matchString(String text, int start, int field,
1594 Map<String,Integer> data, CalendarBuilder calb) {
1595 if (data != null) {
1596 String bestMatch = null;
1597
1598 for (String name : data.keySet()) {
1599 int length = name.length();
1600 if (bestMatch == null || length > bestMatch.length()) {
1601 if (text.regionMatches(true, start, name, 0, length)) {
1602 bestMatch = name;
1603 }
1604 }
1605 }
1606
1607 if (bestMatch != null) {
1608 calb.set(field, data.get(bestMatch));
1609 return start + bestMatch.length();
1610 }
1611 }
1612 return -start;
1613 }
1614
1615 private int matchZoneString(String text, int start, String[] zoneNames) {
1616 for (int i = 1; i <= 4; ++i) {
1617 // Checking long and short zones [1 & 2],
1618 // and long and short daylight [3 & 4].
1619 String zoneName = zoneNames[i];
1620 if (text.regionMatches(true, start,
1621 zoneName, 0, zoneName.length())) {
1622 return i;
1623 }
1624 }
1625 return -1;
1626 }
1627
1628 private boolean matchDSTString(String text, int start, int zoneIndex, int standardIndex,
1629 String[][] zoneStrings) {
1630 int index = standardIndex + 2;
1631 String zoneName = zoneStrings[zoneIndex][index];
1632 if (text.regionMatches(true, start,
1633 zoneName, 0, zoneName.length())) {
1634 return true;
1635 }
1636 return false;
1637 }
1638
1639 /**
1640 * find time zone 'text' matched zoneStrings and set to internal
1641 * calendar.
1642 */
1643 private int subParseZoneString(String text, int start, CalendarBuilder calb) {
1644 boolean useSameName = false; // true if standard and daylight time use the same abbreviation.
1645 TimeZone currentTimeZone = getTimeZone();
1646
1647 // At this point, check for named time zones by looking through
1648 // the locale data from the TimeZoneNames strings.
1649 // Want to be able to parse both short and long forms.
1650 int zoneIndex = formatData.getZoneIndex(currentTimeZone.getID());
1651 TimeZone tz = null;
1652 String[][] zoneStrings = formatData.getZoneStringsWrapper();
1653 String[] zoneNames = null;
1654 int nameIndex = 0;
1655 if (zoneIndex != -1) {
1656 zoneNames = zoneStrings[zoneIndex];
1657 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1658 if (nameIndex <= 2) {
1659 // Check if the standard name (abbr) and the daylight name are the same.
1660 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1661 }
1662 tz = TimeZone.getTimeZone(zoneNames[0]);
1663 }
1664 }
1665 if (tz == null) {
1666 zoneIndex = formatData.getZoneIndex(TimeZone.getDefault().getID());
1667 if (zoneIndex != -1) {
1668 zoneNames = zoneStrings[zoneIndex];
1669 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1670 if (nameIndex <= 2) {
1671 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1672 }
1673 tz = TimeZone.getTimeZone(zoneNames[0]);
1674 }
1675 }
1676 }
1677
1678 if (tz == null) {
1679 int len = zoneStrings.length;
1680 for (int i = 0; i < len; i++) {
1681 zoneNames = zoneStrings[i];
1682 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1683 if (nameIndex <= 2) {
1684 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1685 }
1686 tz = TimeZone.getTimeZone(zoneNames[0]);
1687 break;
1688 }
1689 }
1690 }
1691 if (tz != null) { // Matched any ?
1692 if (!tz.equals(currentTimeZone)) {
1693 setTimeZone(tz);
1694 }
1695 // If the time zone matched uses the same name
1696 // (abbreviation) for both standard and daylight time,
1697 // let the time zone in the Calendar decide which one.
1698 //
1699 // Also if tz.getDSTSaving() returns 0 for DST, use tz to
1700 // determine the local time. (6645292)
1701 int dstAmount = (nameIndex >= 3) ? tz.getDSTSavings() : 0;
1702 if (!(useSameName || (nameIndex >= 3 && dstAmount == 0))) {
1703 calb.set(Calendar.DST_OFFSET, dstAmount);
1704 }
1705 return (start + zoneNames[nameIndex].length());
1706 }
1707 return 0;
1708 }
1709
1710 /**
1711 * Parses numeric forms of time zone offset, such as "hh:mm", and
1712 * sets calb to the parsed value.
1713 *
1714 * @param text the text to be parsed
1715 * @param start the character position to start parsing
1716 * @param sign 1: positive; -1: negative
1717 * @param count 0: 'Z' or "GMT+hh:mm" parsing; 1 - 3: the number of 'X's
1718 * @param colon true - colon required between hh and mm; false - no colon required
1719 * @param calb a CalendarBuilder in which the parsed value is stored
1720 * @return updated parsed position, or its negative value to indicate a parsing error
1721 */
1722 private int subParseNumericZone(String text, int start, int sign, int count,
1723 boolean colon, CalendarBuilder calb) {
1724 int index = start;
1725
1726 parse:
1727 try {
1728 char c = text.charAt(index++);
1729 // Parse hh
1730 int hours;
1731 if (!isDigit(c)) {
1732 break parse;
1733 }
1734 hours = c - '0';
1735 c = text.charAt(index++);
1736 if (isDigit(c)) {
1737 hours = hours * 10 + (c - '0');
1738 } else {
1739 // If no colon in RFC 822 or 'X' (ISO), two digits are
1740 // required.
1741 if (count > 0 || !colon) {
1742 break parse;
1743 }
1744 --index;
1745 }
1746 if (hours > 23) {
1747 break parse;
1748 }
1749 int minutes = 0;
1750 if (count != 1) {
1751 // Proceed with parsing mm
1752 c = text.charAt(index++);
1753 if (colon) {
1754 if (c != ':') {
1755 break parse;
1756 }
1757 c = text.charAt(index++);
1758 }
1759 if (!isDigit(c)) {
1760 break parse;
1761 }
1762 minutes = c - '0';
1763 c = text.charAt(index++);
1764 if (!isDigit(c)) {
1765 break parse;
1766 }
1767 minutes = minutes * 10 + (c - '0');
1768 if (minutes > 59) {
1769 break parse;
1770 }
1771 }
1772 minutes += hours * 60;
1773 calb.set(Calendar.ZONE_OFFSET, minutes * MILLIS_PER_MINUTE * sign)
1774 .set(Calendar.DST_OFFSET, 0);
1775 return index;
1776 } catch (IndexOutOfBoundsException e) {
1777 }
1778 return 1 - index; // -(index - 1)
1779 }
1780
1781 private boolean isDigit(char c) {
1782 return c >= '0' && c <= '9';
1783 }
1784
1785 /**
1786 * Private member function that converts the parsed date strings into
1787 * timeFields. Returns -start (for ParsePosition) if failed.
1788 * @param text the time text to be parsed.
1789 * @param start where to start parsing.
1790 * @param patternCharIndex the index of the pattern character.
1791 * @param count the count of a pattern character.
1792 * @param obeyCount if true, then the next field directly abuts this one,
1793 * and we should use the count to know when to stop parsing.
1794 * @param ambiguousYear return parameter; upon return, if ambiguousYear[0]
1795 * is true, then a two-digit year was parsed and may need to be readjusted.
1796 * @param origPos origPos.errorIndex is used to return an error index
1797 * at which a parse error occurred, if matching failure occurs.
1798 * @return the new start position if matching succeeded; -1 indicating
1799 * matching failure, otherwise. In case matching failure occurred,
1800 * an error index is set to origPos.errorIndex.
1801 */
1802 private int subParse(String text, int start, int patternCharIndex, int count,
1803 boolean obeyCount, boolean[] ambiguousYear,
1804 ParsePosition origPos,
1805 boolean useFollowingMinusSignAsDelimiter, CalendarBuilder calb) {
1806 Number number = null;
1807 int value = 0;
1808 ParsePosition pos = new ParsePosition(0);
1809 pos.index = start;
1810 if (patternCharIndex == PATTERN_WEEK_YEAR && !calendar.isWeekDateSupported()) {
1811 // use calendar year 'y' instead
1812 patternCharIndex = PATTERN_YEAR;
1813 }
1814 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1815
1816 // If there are any spaces here, skip over them. If we hit the end
1817 // of the string, then fail.
1818 for (;;) {
1819 if (pos.index >= text.length()) {
1820 origPos.errorIndex = start;
1821 return -1;
1822 }
1823 char c = text.charAt(pos.index);
1824 if (c != ' ' && c != '\t') {
1825 break;
1826 }
1827 ++pos.index;
1828 }
1829
1830 parsing:
1831 {
1832 // We handle a few special cases here where we need to parse
1833 // a number value. We handle further, more generic cases below. We need
1834 // to handle some of them here because some fields require extra processing on
1835 // the parsed value.
1836 if (patternCharIndex == PATTERN_HOUR_OF_DAY1 ||
1837 patternCharIndex == PATTERN_HOUR1 ||
1838 (patternCharIndex == PATTERN_MONTH && count <= 2) ||
1839 patternCharIndex == PATTERN_YEAR ||
1840 patternCharIndex == PATTERN_WEEK_YEAR) {
1841 // It would be good to unify this with the obeyCount logic below,
1842 // but that's going to be difficult.
1843 if (obeyCount) {
1844 if ((start+count) > text.length()) {
1845 break parsing;
1846 }
1847 number = numberFormat.parse(text.substring(0, start+count), pos);
1848 } else {
1849 number = numberFormat.parse(text, pos);
1850 }
1851 if (number == null) {
1852 if (patternCharIndex != PATTERN_YEAR || calendar instanceof GregorianCalendar) {
1853 break parsing;
1854 }
1855 } else {
1856 value = number.intValue();
1857
1858 if (useFollowingMinusSignAsDelimiter && (value < 0) &&
1859 (((pos.index < text.length()) &&
1860 (text.charAt(pos.index) != minusSign)) ||
1861 ((pos.index == text.length()) &&
1862 (text.charAt(pos.index-1) == minusSign)))) {
1863 value = -value;
1864 pos.index--;
1865 }
1866 }
1867 }
1868
1869 boolean useDateFormatSymbols = useDateFormatSymbols();
1870
1871 int index;
1872 switch (patternCharIndex) {
1873 case PATTERN_ERA: // 'G'
1874 if (useDateFormatSymbols) {
1875 if ((index = matchString(text, start, Calendar.ERA, formatData.getEras(), calb)) > 0) {
1876 return index;
1877 }
1878 } else {
1879 Map<String, Integer> map = calendar.getDisplayNames(field,
1880 Calendar.ALL_STYLES,
1881 locale);
1882 if ((index = matchString(text, start, field, map, calb)) > 0) {
1883 return index;
1884 }
1885 }
1886 break parsing;
1887
1888 case PATTERN_WEEK_YEAR: // 'Y'
1889 case PATTERN_YEAR: // 'y'
1890 if (!(calendar instanceof GregorianCalendar)) {
1891 // calendar might have text representations for year values,
1892 // such as "\u5143" in JapaneseImperialCalendar.
1893 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT;
1894 Map<String, Integer> map = calendar.getDisplayNames(field, style, locale);
1895 if (map != null) {
1896 if ((index = matchString(text, start, field, map, calb)) > 0) {
1897 return index;
1898 }
1899 }
1900 calb.set(field, value);
1901 return pos.index;
1902 }
1903
1904 // If there are 3 or more YEAR pattern characters, this indicates
1905 // that the year value is to be treated literally, without any
1906 // two-digit year adjustments (e.g., from "01" to 2001). Otherwise
1907 // we made adjustments to place the 2-digit year in the proper
1908 // century, for parsed strings from "00" to "99". Any other string
1909 // is treated literally: "2250", "-1", "1", "002".
1910 if (count <= 2 && (pos.index - start) == 2
1911 && Character.isDigit(text.charAt(start))
1912 && Character.isDigit(text.charAt(start+1))) {
1913 // Assume for example that the defaultCenturyStart is 6/18/1903.
1914 // This means that two-digit years will be forced into the range
1915 // 6/18/1903 to 6/17/2003. As a result, years 00, 01, and 02
1916 // correspond to 2000, 2001, and 2002. Years 04, 05, etc. correspond
1917 // to 1904, 1905, etc. If the year is 03, then it is 2003 if the
1918 // other fields specify a date before 6/18, or 1903 if they specify a
1919 // date afterwards. As a result, 03 is an ambiguous year. All other
1920 // two-digit years are unambiguous.
1921 int ambiguousTwoDigitYear = defaultCenturyStartYear % 100;
1922 ambiguousYear[0] = value == ambiguousTwoDigitYear;
1923 value += (defaultCenturyStartYear/100)*100 +
1924 (value < ambiguousTwoDigitYear ? 100 : 0);
1925 }
1926 calb.set(field, value);
1927 return pos.index;
1928
1929 case PATTERN_MONTH: // 'M'
1930 if (count <= 2) // i.e., M or MM.
1931 {
1932 // Don't want to parse the month if it is a string
1933 // while pattern uses numeric style: M or MM.
1934 // [We computed 'value' above.]
1935 calb.set(Calendar.MONTH, value - 1);
1936 return pos.index;
1937 }
1938
1939 if (useDateFormatSymbols) {
1940 // count >= 3 // i.e., MMM or MMMM
1941 // Want to be able to parse both short and long forms.
1942 // Try count == 4 first:
1943 int newStart = 0;
1944 if ((newStart = matchString(text, start, Calendar.MONTH,
1945 formatData.getMonths(), calb)) > 0) {
1946 return newStart;
1947 }
1948 // count == 4 failed, now try count == 3
1949 if ((index = matchString(text, start, Calendar.MONTH,
1950 formatData.getShortMonths(), calb)) > 0) {
1951 return index;
1952 }
1953 } else {
1954 Map<String, Integer> map = calendar.getDisplayNames(field,
1955 Calendar.ALL_STYLES,
1956 locale);
1957 if ((index = matchString(text, start, field, map, calb)) > 0) {
1958 return index;
1959 }
1960 }
1961 break parsing;
1962
1963 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59
1964 if (!isLenient()) {
1965 // Validate the hour value in non-lenient
1966 if (value < 1 || value > 24) {
1967 break parsing;
1968 }
1969 }
1970 // [We computed 'value' above.]
1971 if (value == calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1) {
1972 value = 0;
1973 }
1974 calb.set(Calendar.HOUR_OF_DAY, value);
1975 return pos.index;
1976
1977 case PATTERN_DAY_OF_WEEK: // 'E'
1978 {
1979 if (useDateFormatSymbols) {
1980 // Want to be able to parse both short and long forms.
1981 // Try count == 4 (DDDD) first:
1982 int newStart = 0;
1983 if ((newStart=matchString(text, start, Calendar.DAY_OF_WEEK,
1984 formatData.getWeekdays(), calb)) > 0) {
1985 return newStart;
1986 }
1987 // DDDD failed, now try DDD
1988 if ((index = matchString(text, start, Calendar.DAY_OF_WEEK,
1989 formatData.getShortWeekdays(), calb)) > 0) {
1990 return index;
1991 }
1992 } else {
1993 int[] styles = { Calendar.LONG, Calendar.SHORT };
1994 for (int style : styles) {
1995 Map<String,Integer> map = calendar.getDisplayNames(field, style, locale);
1996 if ((index = matchString(text, start, field, map, calb)) > 0) {
1997 return index;
1998 }
1999 }
2000 }
2001 }
2002 break parsing;
2003
2004 case PATTERN_AM_PM: // 'a'
2005 if (useDateFormatSymbols) {
2006 if ((index = matchString(text, start, Calendar.AM_PM,
2007 formatData.getAmPmStrings(), calb)) > 0) {
2008 return index;
2009 }
2010 } else {
2011 Map<String,Integer> map = calendar.getDisplayNames(field, Calendar.ALL_STYLES, locale);
2012 if ((index = matchString(text, start, field, map, calb)) > 0) {
2013 return index;
2014 }
2015 }
2016 break parsing;
2017
2018 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM
2019 if (!isLenient()) {
2020 // Validate the hour value in non-lenient
2021 if (value < 1 || value > 12) {
2022 break parsing;
2023 }
2024 }
2025 // [We computed 'value' above.]
2026 if (value == calendar.getLeastMaximum(Calendar.HOUR) + 1) {
2027 value = 0;
2028 }
2029 calb.set(Calendar.HOUR, value);
2030 return pos.index;
2031
2032 case PATTERN_ZONE_NAME: // 'z'
2033 case PATTERN_ZONE_VALUE: // 'Z'
2034 {
2035 int sign = 0;
2036 try {
2037 char c = text.charAt(pos.index);
2038 if (c == '+') {
2039 sign = 1;
2040 } else if (c == '-') {
2041 sign = -1;
2042 }
2043 if (sign == 0) {
2044 // Try parsing a custom time zone "GMT+hh:mm" or "GMT".
2045 if ((c == 'G' || c == 'g')
2046 && (text.length() - start) >= GMT.length()
2047 && text.regionMatches(true, start, GMT, 0, GMT.length())) {
2048 pos.index = start + GMT.length();
2049
2050 if ((text.length() - pos.index) > 0) {
2051 c = text.charAt(pos.index);
2052 if (c == '+') {
2053 sign = 1;
2054 } else if (c == '-') {
2055 sign = -1;
2056 }
2057 }
2058
2059 if (sign == 0) { /* "GMT" without offset */
2060 calb.set(Calendar.ZONE_OFFSET, 0)
2061 .set(Calendar.DST_OFFSET, 0);
2062 return pos.index;
2063 }
2064
2065 // Parse the rest as "hh:mm"
2066 int i = subParseNumericZone(text, ++pos.index,
2067 sign, 0, true, calb);
2068 if (i > 0) {
2069 return i;
2070 }
2071 pos.index = -i;
2072 } else {
2073 // Try parsing the text as a time zone
2074 // name or abbreviation.
2075 int i = subParseZoneString(text, pos.index, calb);
2076 if (i > 0) {
2077 return i;
2078 }
2079 pos.index = -i;
2080 }
2081 } else {
2082 // Parse the rest as "hhmm" (RFC 822)
2083 int i = subParseNumericZone(text, ++pos.index,
2084 sign, 0, false, calb);
2085 if (i > 0) {
2086 return i;
2087 }
2088 pos.index = -i;
2089 }
2090 } catch (IndexOutOfBoundsException e) {
2091 }
2092 }
2093 break parsing;
2094
2095 case PATTERN_ISO_ZONE: // 'X'
2096 {
2097 if ((text.length() - pos.index) <= 0) {
2098 break parsing;
2099 }
2100
2101 int sign = 0;
2102 char c = text.charAt(pos.index);
2103 if (c == 'Z') {
2104 calb.set(Calendar.ZONE_OFFSET, 0).set(Calendar.DST_OFFSET, 0);
2105 return ++pos.index;
2106 }
2107
2108 // parse text as "+/-hh[[:]mm]" based on count
2109 if (c == '+') {
2110 sign = 1;
2111 } else if (c == '-') {
2112 sign = -1;
2113 } else {
2114 ++pos.index;
2115 break parsing;
2116 }
2117 int i = subParseNumericZone(text, ++pos.index, sign, count,
2118 count == 3, calb);
2119 if (i > 0) {
2120 return i;
2121 }
2122 pos.index = -i;
2123 }
2124 break parsing;
2125
2126 default:
2127 // case PATTERN_DAY_OF_MONTH: // 'd'
2128 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59
2129 // case PATTERN_MINUTE: // 'm'
2130 // case PATTERN_SECOND: // 's'
2131 // case PATTERN_MILLISECOND: // 'S'
2132 // case PATTERN_DAY_OF_YEAR: // 'D'
2133 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F'
2134 // case PATTERN_WEEK_OF_YEAR: // 'w'
2135 // case PATTERN_WEEK_OF_MONTH: // 'W'
2136 // case PATTERN_HOUR0: // 'K' 0-based. eg, 11PM + 1 hour =>> 0 AM
2137 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' (pseudo field);
2138
2139 // Handle "generic" fields
2140 if (obeyCount) {
2141 if ((start+count) > text.length()) {
2142 break parsing;
2143 }
2144 number = numberFormat.parse(text.substring(0, start+count), pos);
2145 } else {
2146 number = numberFormat.parse(text, pos);
2147 }
2148 if (number != null) {
2149 value = number.intValue();
2150
2151 if (useFollowingMinusSignAsDelimiter && (value < 0) &&
2152 (((pos.index < text.length()) &&
2153 (text.charAt(pos.index) != minusSign)) ||
2154 ((pos.index == text.length()) &&
2155 (text.charAt(pos.index-1) == minusSign)))) {
2156 value = -value;
2157 pos.index--;
2158 }
2159
2160 calb.set(field, value);
2161 return pos.index;
2162 }
2163 break parsing;
2164 }
2165 }
2166
2167 // Parsing failed.
2168 origPos.errorIndex = pos.index;
2169 return -1;
2170 }
2171
2172 /**
2173 * Returns true if the DateFormatSymbols has been set explicitly or locale
2174 * is null.
2175 */
2176 private boolean useDateFormatSymbols() {
2177 return useDateFormatSymbols || locale == null;
2178 }
2179
2180 /**
2181 * Translates a pattern, mapping each character in the from string to the
2182 * corresponding character in the to string.
2183 *
2184 * @exception IllegalArgumentException if the given pattern is invalid
2185 */
2186 private String translatePattern(String pattern, String from, String to) {
2187 StringBuilder result = new StringBuilder();
2188 boolean inQuote = false;
2189 for (int i = 0; i < pattern.length(); ++i) {
2190 char c = pattern.charAt(i);
2191 if (inQuote) {
2192 if (c == '\'') {
2193 inQuote = false;
2194 }
2195 }
2196 else {
2197 if (c == '\'') {
2198 inQuote = true;
2199 } else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
2200 int ci = from.indexOf(c);
2201 if (ci >= 0) {
2202 // patternChars is longer than localPatternChars due
2203 // to serialization compatibility. The pattern letters
2204 // unsupported by localPatternChars pass through.
2205 if (ci < to.length()) {
2206 c = to.charAt(ci);
2207 }
2208 } else {
2209 throw new IllegalArgumentException("Illegal pattern " +
2210 " character '" +
2211 c + "'");
2212 }
2213 }
2214 }
2215 result.append(c);
2216 }
2217 if (inQuote) {
2218 throw new IllegalArgumentException("Unfinished quote in pattern");
2219 }
2220 return result.toString();
2221 }
2222
2223 /**
2224 * Returns a pattern string describing this date format.
2225 *
2226 * @return a pattern string describing this date format.
2227 */
2228 public String toPattern() {
2229 return pattern;
2230 }
2231
2232 /**
2233 * Returns a localized pattern string describing this date format.
2234 *
2235 * @return a localized pattern string describing this date format.
2236 */
2237 public String toLocalizedPattern() {
2238 return translatePattern(pattern,
2239 DateFormatSymbols.patternChars,
2240 formatData.getLocalPatternChars());
2241 }
2242
2243 /**
2244 * Applies the given pattern string to this date format.
2245 *
2246 * @param pattern the new date and time pattern for this date format
2247 * @exception NullPointerException if the given pattern is null
2248 * @exception IllegalArgumentException if the given pattern is invalid
2249 */
2250 public void applyPattern(String pattern)
2251 {
2252 applyPatternImpl(pattern);
2253 }
2254
2255 private void applyPatternImpl(String pattern) {
2256 compiledPattern = compile(pattern);
2257 this.pattern = pattern;
2258 }
2259
2260 /**
2261 * Applies the given localized pattern string to this date format.
2262 *
2263 * @param pattern a String to be mapped to the new date and time format
2264 * pattern for this format
2265 * @exception NullPointerException if the given pattern is null
2266 * @exception IllegalArgumentException if the given pattern is invalid
2267 */
2268 public void applyLocalizedPattern(String pattern) {
2269 String p = translatePattern(pattern,
2270 formatData.getLocalPatternChars(),
2271 DateFormatSymbols.patternChars);
2272 compiledPattern = compile(p);
2273 this.pattern = p;
2274 }
2275
2276 /**
2277 * Gets a copy of the date and time format symbols of this date format.
2278 *
2279 * @return the date and time format symbols of this date format
2280 * @see #setDateFormatSymbols
2281 */
2282 public DateFormatSymbols getDateFormatSymbols()
2283 {
2284 return (DateFormatSymbols)formatData.clone();
2285 }
2286
2287 /**
2288 * Sets the date and time format symbols of this date format.
2289 *
2290 * @param newFormatSymbols the new date and time format symbols
2291 * @exception NullPointerException if the given newFormatSymbols is null
2292 * @see #getDateFormatSymbols
2293 */
2294 public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols)
2295 {
2296 this.formatData = (DateFormatSymbols)newFormatSymbols.clone();
2297 useDateFormatSymbols = true;
2298 }
2299
2300 /**
2301 * Creates a copy of this <code>SimpleDateFormat</code>. This also
2302 * clones the format's date format symbols.
2303 *
2304 * @return a clone of this <code>SimpleDateFormat</code>
2305 */
2306 @Override
2307 public Object clone() {
2308 SimpleDateFormat other = (SimpleDateFormat) super.clone();
2309 other.formatData = (DateFormatSymbols) formatData.clone();
2310 return other;
2311 }
2312
2313 /**
2314 * Returns the hash code value for this <code>SimpleDateFormat</code> object.
2315 *
2316 * @return the hash code value for this <code>SimpleDateFormat</code> object.
2317 */
2318 @Override
2319 public int hashCode()
2320 {
2321 return pattern.hashCode();
2322 // just enough fields for a reasonable distribution
2323 }
2324
2325 /**
2326 * Compares the given object with this <code>SimpleDateFormat</code> for
2327 * equality.
2328 *
2329 * @return true if the given object is equal to this
2330 * <code>SimpleDateFormat</code>
2331 */
2332 @Override
2333 public boolean equals(Object obj)
2334 {
2335 if (!super.equals(obj)) {
2336 return false; // super does class check
2337 }
2338 SimpleDateFormat that = (SimpleDateFormat) obj;
2339 return (pattern.equals(that.pattern)
2340 && formatData.equals(that.formatData));
2341 }
2342
2343 /**
2344 * After reading an object from the input stream, the format
2345 * pattern in the object is verified.
2346 * <p>
2347 * @exception InvalidObjectException if the pattern is invalid
2348 */
2349 private void readObject(ObjectInputStream stream)
2350 throws IOException, ClassNotFoundException {
2351 stream.defaultReadObject();
2352
2353 try {
2354 compiledPattern = compile(pattern);
2355 } catch (Exception e) {
2356 throw new InvalidObjectException("invalid pattern");
2357 }
2358
2359 if (serialVersionOnStream < 1) {
2360 // didn't have defaultCenturyStart field
2361 initializeDefaultCentury();
2362 }
2363 else {
2364 // fill in dependent transient field
2365 parseAmbiguousDatesAsAfter(defaultCenturyStart);
2366 }
2367 serialVersionOnStream = currentSerialVersion;
2368
2369 // If the deserialized object has a SimpleTimeZone, try
2370 // to replace it with a ZoneInfo equivalent in order to
2371 // be compatible with the SimpleTimeZone-based
2372 // implementation as much as possible.
2373 TimeZone tz = getTimeZone();
2374 if (tz instanceof SimpleTimeZone) {
2375 String id = tz.getID();
2376 TimeZone zi = TimeZone.getTimeZone(id);
2377 if (zi != null && zi.hasSameRules(tz) && zi.getID().equals(id)) {
2378 setTimeZone(zi);
2379 }
2380 }
2381 }
2382
2383 /**
2384 * Analyze the negative subpattern of DecimalFormat and set/update values
2385 * as necessary.
2386 */
2387 private void checkNegativeNumberExpression() {
2388 if ((numberFormat instanceof DecimalFormat) &&
2389 !numberFormat.equals(originalNumberFormat)) {
2390 String numberPattern = ((DecimalFormat)numberFormat).toPattern();
2391 if (!numberPattern.equals(originalNumberPattern)) {
2392 hasFollowingMinusSign = false;
2393
2394 int separatorIndex = numberPattern.indexOf(';');
2395 // If the negative subpattern is not absent, we have to analayze
2396 // it in order to check if it has a following minus sign.
2397 if (separatorIndex > -1) {
2398 int minusIndex = numberPattern.indexOf('-', separatorIndex);
2399 if ((minusIndex > numberPattern.lastIndexOf('0')) &&
2400 (minusIndex > numberPattern.lastIndexOf('#'))) {
2401 hasFollowingMinusSign = true;
2402 minusSign = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getMinusSign();
2403 }
2404 }
2405 originalNumberPattern = numberPattern;
2406 }
2407 originalNumberFormat = numberFormat;
2408 }
2409 }
2410
2411 }