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
39 package java.text;
40
41 import java.io.IOException;
42 import java.io.InvalidObjectException;
43 import java.io.ObjectInputStream;
44 import static java.text.DateFormatSymbols.*;
45 import java.util.Calendar;
46 import java.util.Date;
47 import java.util.GregorianCalendar;
48 import java.util.Locale;
49 import java.util.Map;
50 import java.util.SimpleTimeZone;
51 import java.util.SortedMap;
52 import java.util.TimeZone;
53 import java.util.concurrent.ConcurrentHashMap;
54 import java.util.concurrent.ConcurrentMap;
55 import sun.util.calendar.CalendarUtils;
56 import sun.util.calendar.ZoneInfoFile;
57 import sun.util.locale.provider.LocaleProviderAdapter;
58
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 */
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 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 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 1.1.4
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
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 * <p>
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 }