1 /*
2 * Copyright (c) 1996, 2017, 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 style="text-align:left">Letter
98 * <th style="text-align:left">Date or Time Component
99 * <th style="text-align:left">Presentation
100 * <th style="text-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 id="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 id="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 id="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 id="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. Letter <em>M</em> is context-sensitive in the
280 * sense that when it is used in the standalone pattern, for example,
281 * "MMMM", it gives the standalone form of a month name and when it is
282 * used in the pattern containing other field(s), for example, "d MMMM",
283 * it gives the format form of a month name. For example, January in the
284 * Catalan language is "de gener" in the format form while it is "gener"
285 * in the standalone form. In this case, "MMMM" will produce "gener" and
286 * the month part of the "d MMMM" will produce "de gener". If a
287 * {@code DateFormatSymbols} has been set explicitly with constructor
288 * {@link #SimpleDateFormat(String,DateFormatSymbols)} or method {@link
289 * #setDateFormatSymbols(DateFormatSymbols)}, the month names given by
290 * the {@code DateFormatSymbols} are used.</li>
291 * <li>Letter <em>L</em> produces the standalone form of month names.</li>
292 * </ul>
293 * <br></li>
294 * <li><strong><a id="timezone">General time zone:</a></strong>
295 * Time zones are interpreted as <a href="#text">text</a> if they have
296 * names. For time zones representing a GMT offset value, the
297 * following syntax is used:
298 * <pre>
299 * <a id="GMTOffsetTimeZone"><i>GMTOffsetTimeZone:</i></a>
300 * <code>GMT</code> <i>Sign</i> <i>Hours</i> <code>:</code> <i>Minutes</i>
301 * <i>Sign:</i> one of
302 * <code>+ -</code>
303 * <i>Hours:</i>
304 * <i>Digit</i>
305 * <i>Digit</i> <i>Digit</i>
306 * <i>Minutes:</i>
307 * <i>Digit</i> <i>Digit</i>
308 * <i>Digit:</i> one of
309 * <code>0 1 2 3 4 5 6 7 8 9</code></pre>
310 * <i>Hours</i> must be between 0 and 23, and <i>Minutes</i> must be between
311 * 00 and 59. The format is locale independent and digits must be taken
312 * from the Basic Latin block of the Unicode standard.
313 * <p>For parsing, <a href="#rfc822timezone">RFC 822 time zones</a> are also
314 * accepted.<br><br></li>
315 * <li><strong><a id="rfc822timezone">RFC 822 time zone:</a></strong>
316 * For formatting, the RFC 822 4-digit time zone format is used:
317 *
318 * <pre>
319 * <i>RFC822TimeZone:</i>
320 * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i>
321 * <i>TwoDigitHours:</i>
322 * <i>Digit Digit</i></pre>
323 * <i>TwoDigitHours</i> must be between 00 and 23. Other definitions
324 * are as for <a href="#timezone">general time zones</a>.
325 *
326 * <p>For parsing, <a href="#timezone">general time zones</a> are also
327 * accepted.
328 * <li><strong><a id="iso8601timezone">ISO 8601 Time zone:</a></strong>
329 * The number of pattern letters designates the format for both formatting
330 * and parsing as follows:
331 * <pre>
332 * <i>ISO8601TimeZone:</i>
333 * <i>OneLetterISO8601TimeZone</i>
334 * <i>TwoLetterISO8601TimeZone</i>
335 * <i>ThreeLetterISO8601TimeZone</i>
336 * <i>OneLetterISO8601TimeZone:</i>
337 * <i>Sign</i> <i>TwoDigitHours</i>
338 * {@code Z}
339 * <i>TwoLetterISO8601TimeZone:</i>
340 * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i>
341 * {@code Z}
342 * <i>ThreeLetterISO8601TimeZone:</i>
343 * <i>Sign</i> <i>TwoDigitHours</i> {@code :} <i>Minutes</i>
344 * {@code Z}</pre>
345 * Other definitions are as for <a href="#timezone">general time zones</a> or
346 * <a href="#rfc822timezone">RFC 822 time zones</a>.
347 *
348 * <p>For formatting, if the offset value from GMT is 0, {@code "Z"} is
349 * produced. If the number of pattern letters is 1, any fraction of an hour
350 * is ignored. For example, if the pattern is {@code "X"} and the time zone is
351 * {@code "GMT+05:30"}, {@code "+05"} is produced.
352 *
353 * <p>For parsing, {@code "Z"} is parsed as the UTC time zone designator.
354 * <a href="#timezone">General time zones</a> are <em>not</em> accepted.
355 *
356 * <p>If the number of pattern letters is 4 or more, {@link
357 * IllegalArgumentException} is thrown when constructing a {@code
358 * SimpleDateFormat} or {@linkplain #applyPattern(String) applying a
359 * pattern}.
360 * </ul>
361 * <code>SimpleDateFormat</code> also supports <em>localized date and time
362 * pattern</em> strings. In these strings, the pattern letters described above
363 * may be replaced with other, locale dependent, pattern letters.
364 * <code>SimpleDateFormat</code> does not deal with the localization of text
365 * other than the pattern letters; that's up to the client of the class.
366 *
367 * <h4>Examples</h4>
368 *
369 * The following examples show how date and time patterns are interpreted in
370 * the U.S. locale. The given date and time are 2001-07-04 12:08:56 local time
371 * in the U.S. Pacific Time time zone.
372 * <blockquote>
373 * <table border=0 cellspacing=3 cellpadding=0 summary="Examples of date and time patterns interpreted in the U.S. locale">
374 * <tr style="background-color: rgb(204, 204, 255);">
375 * <th style="text-align:left">Date and Time Pattern
376 * <th style="text-align:left">Result
377 * <tr>
378 * <td><code>"yyyy.MM.dd G 'at' HH:mm:ss z"</code>
379 * <td><code>2001.07.04 AD at 12:08:56 PDT</code>
380 * <tr style="background-color: rgb(238, 238, 255);">
381 * <td><code>"EEE, MMM d, ''yy"</code>
382 * <td><code>Wed, Jul 4, '01</code>
383 * <tr>
384 * <td><code>"h:mm a"</code>
385 * <td><code>12:08 PM</code>
386 * <tr style="background-color: rgb(238, 238, 255);">
387 * <td><code>"hh 'o''clock' a, zzzz"</code>
388 * <td><code>12 o'clock PM, Pacific Daylight Time</code>
389 * <tr>
390 * <td><code>"K:mm a, z"</code>
391 * <td><code>0:08 PM, PDT</code>
392 * <tr style="background-color: rgb(238, 238, 255);">
393 * <td><code>"yyyyy.MMMMM.dd GGG hh:mm aaa"</code>
394 * <td><code>02001.July.04 AD 12:08 PM</code>
395 * <tr>
396 * <td><code>"EEE, d MMM yyyy HH:mm:ss Z"</code>
397 * <td><code>Wed, 4 Jul 2001 12:08:56 -0700</code>
398 * <tr style="background-color: rgb(238, 238, 255);">
399 * <td><code>"yyMMddHHmmssZ"</code>
400 * <td><code>010704120856-0700</code>
401 * <tr>
402 * <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSZ"</code>
403 * <td><code>2001-07-04T12:08:56.235-0700</code>
404 * <tr style="background-color: rgb(238, 238, 255);">
405 * <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSXXX"</code>
406 * <td><code>2001-07-04T12:08:56.235-07:00</code>
407 * <tr>
408 * <td><code>"YYYY-'W'ww-u"</code>
409 * <td><code>2001-W27-3</code>
410 * </table>
411 * </blockquote>
412 *
413 * <h4><a id="synchronization">Synchronization</a></h4>
414 *
415 * <p>
416 * Date formats are not synchronized.
417 * It is recommended to create separate format instances for each thread.
418 * If multiple threads access a format concurrently, it must be synchronized
419 * externally.
420 *
421 * @see <a href="http://docs.oracle.com/javase/tutorial/i18n/format/simpleDateFormat.html">Java Tutorial</a>
422 * @see java.util.Calendar
423 * @see java.util.TimeZone
424 * @see DateFormat
425 * @see DateFormatSymbols
426 * @author Mark Davis, Chen-Lieh Huang, Alan Liu
427 */
428 public class SimpleDateFormat extends DateFormat {
429
430 // the official serial version ID which says cryptically
431 // which version we're compatible with
432 static final long serialVersionUID = 4774881970558875024L;
433
434 // the internal serial version which says which version was written
435 // - 0 (default) for version up to JDK 1.1.3
436 // - 1 for version from JDK 1.1.4, which includes a new field
437 static final int currentSerialVersion = 1;
438
439 /**
440 * The version of the serialized data on the stream. Possible values:
441 * <ul>
442 * <li><b>0</b> or not present on stream: JDK 1.1.3. This version
443 * has no <code>defaultCenturyStart</code> on stream.
444 * <li><b>1</b> JDK 1.1.4 or later. This version adds
445 * <code>defaultCenturyStart</code>.
446 * </ul>
447 * When streaming out this class, the most recent format
448 * and the highest allowable <code>serialVersionOnStream</code>
449 * is written.
450 * @serial
451 * @since 1.1.4
452 */
453 private int serialVersionOnStream = currentSerialVersion;
454
455 /**
456 * The pattern string of this formatter. This is always a non-localized
457 * pattern. May not be null. See class documentation for details.
458 * @serial
459 */
460 private String pattern;
461
462 /**
463 * Saved numberFormat and pattern.
464 * @see SimpleDateFormat#checkNegativeNumberExpression
465 */
466 private transient NumberFormat originalNumberFormat;
467 private transient String originalNumberPattern;
468
469 /**
470 * The minus sign to be used with format and parse.
471 */
472 private transient char minusSign = '-';
473
474 /**
475 * True when a negative sign follows a number.
476 * (True as default in Arabic.)
477 */
478 private transient boolean hasFollowingMinusSign = false;
479
480 /**
481 * True if standalone form needs to be used.
482 */
483 private transient boolean forceStandaloneForm = false;
484
485 /**
486 * The compiled pattern.
487 */
488 private transient char[] compiledPattern;
489
490 /**
491 * Tags for the compiled pattern.
492 */
493 private static final int TAG_QUOTE_ASCII_CHAR = 100;
494 private static final int TAG_QUOTE_CHARS = 101;
495
496 /**
497 * Locale dependent digit zero.
498 * @see #zeroPaddingNumber
499 * @see java.text.DecimalFormatSymbols#getZeroDigit
500 */
501 private transient char zeroDigit;
502
503 /**
504 * The symbols used by this formatter for week names, month names,
505 * etc. May not be null.
506 * @serial
507 * @see java.text.DateFormatSymbols
508 */
509 private DateFormatSymbols formatData;
510
511 /**
512 * We map dates with two-digit years into the century starting at
513 * <code>defaultCenturyStart</code>, which may be any date. May
514 * not be null.
515 * @serial
516 * @since 1.1.4
517 */
518 private Date defaultCenturyStart;
519
520 private transient int defaultCenturyStartYear;
521
522 private static final int MILLIS_PER_MINUTE = 60 * 1000;
523
524 // For time zones that have no names, use strings GMT+minutes and
525 // GMT-minutes. For instance, in France the time zone is GMT+60.
526 private static final String GMT = "GMT";
527
528 /**
529 * Cache NumberFormat instances with Locale key.
530 */
531 private static final ConcurrentMap<Locale, NumberFormat> cachedNumberFormatData
532 = new ConcurrentHashMap<>(3);
533
534 /**
535 * The Locale used to instantiate this
536 * <code>SimpleDateFormat</code>. The value may be null if this object
537 * has been created by an older <code>SimpleDateFormat</code> and
538 * deserialized.
539 *
540 * @serial
541 * @since 1.6
542 */
543 private Locale locale;
544
545 /**
546 * Indicates whether this <code>SimpleDateFormat</code> should use
547 * the DateFormatSymbols. If true, the format and parse methods
548 * use the DateFormatSymbols values. If false, the format and
549 * parse methods call Calendar.getDisplayName or
550 * Calendar.getDisplayNames.
551 */
552 transient boolean useDateFormatSymbols;
553
554 /**
555 * Constructs a <code>SimpleDateFormat</code> using the default pattern and
556 * date format symbols for the default
557 * {@link java.util.Locale.Category#FORMAT FORMAT} locale.
558 * <b>Note:</b> This constructor may not support all locales.
559 * For full coverage, use the factory methods in the {@link DateFormat}
560 * class.
561 */
562 public SimpleDateFormat() {
563 this("", Locale.getDefault(Locale.Category.FORMAT));
564 applyPatternImpl(LocaleProviderAdapter.getResourceBundleBased().getLocaleResources(locale)
565 .getDateTimePattern(SHORT, SHORT, calendar));
566 }
567
568 /**
569 * Constructs a <code>SimpleDateFormat</code> using the given pattern and
570 * the default date format symbols for the default
571 * {@link java.util.Locale.Category#FORMAT FORMAT} locale.
572 * <b>Note:</b> This constructor may not support all locales.
573 * For full coverage, use the factory methods in the {@link DateFormat}
574 * class.
575 * <p>This is equivalent to calling
576 * {@link #SimpleDateFormat(String, Locale)
577 * SimpleDateFormat(pattern, Locale.getDefault(Locale.Category.FORMAT))}.
578 *
579 * @see java.util.Locale#getDefault(java.util.Locale.Category)
580 * @see java.util.Locale.Category#FORMAT
581 * @param pattern the pattern describing the date and time format
582 * @exception NullPointerException if the given pattern is null
583 * @exception IllegalArgumentException if the given pattern is invalid
584 */
585 public SimpleDateFormat(String pattern)
586 {
587 this(pattern, Locale.getDefault(Locale.Category.FORMAT));
588 }
589
590 /**
591 * Constructs a <code>SimpleDateFormat</code> using the given pattern and
592 * the default date format symbols for the given locale.
593 * <b>Note:</b> This constructor may not support all locales.
594 * For full coverage, use the factory methods in the {@link DateFormat}
595 * class.
596 *
597 * @param pattern the pattern describing the date and time format
598 * @param locale the locale whose date format symbols should be used
599 * @exception NullPointerException if the given pattern or locale is null
600 * @exception IllegalArgumentException if the given pattern is invalid
601 */
602 public SimpleDateFormat(String pattern, Locale locale)
603 {
604 if (pattern == null || locale == null) {
605 throw new NullPointerException();
606 }
607
608 initializeCalendar(locale);
609 this.pattern = pattern;
610 this.formatData = DateFormatSymbols.getInstanceRef(locale);
611 this.locale = locale;
612 initialize(locale);
613 }
614
615 /**
616 * Constructs a <code>SimpleDateFormat</code> using the given pattern and
617 * date format symbols.
618 *
619 * @param pattern the pattern describing the date and time format
620 * @param formatSymbols the date format symbols to be used for formatting
621 * @exception NullPointerException if the given pattern or formatSymbols is null
622 * @exception IllegalArgumentException if the given pattern is invalid
623 */
624 public SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols)
625 {
626 if (pattern == null || formatSymbols == null) {
627 throw new NullPointerException();
628 }
629
630 this.pattern = pattern;
631 this.formatData = (DateFormatSymbols) formatSymbols.clone();
632 this.locale = Locale.getDefault(Locale.Category.FORMAT);
633 initializeCalendar(this.locale);
634 initialize(this.locale);
635 useDateFormatSymbols = true;
636 }
637
638 /* Initialize compiledPattern and numberFormat fields */
639 private void initialize(Locale loc) {
640 // Verify and compile the given pattern.
641 compiledPattern = compile(pattern);
642
643 /* try the cache first */
644 numberFormat = cachedNumberFormatData.get(loc);
645 if (numberFormat == null) { /* cache miss */
646 numberFormat = NumberFormat.getIntegerInstance(loc);
647 numberFormat.setGroupingUsed(false);
648
649 /* update cache */
650 cachedNumberFormatData.putIfAbsent(loc, numberFormat);
651 }
652 numberFormat = (NumberFormat) numberFormat.clone();
653
654 initializeDefaultCentury();
655 }
656
657 private void initializeCalendar(Locale loc) {
658 if (calendar == null) {
659 assert loc != null;
660 // The format object must be constructed using the symbols for this zone.
661 // However, the calendar should use the current default TimeZone.
662 // If this is not contained in the locale zone strings, then the zone
663 // will be formatted using generic GMT+/-H:MM nomenclature.
664 calendar = Calendar.getInstance(TimeZone.getDefault(), loc);
665 }
666 }
667
668 /**
669 * Returns the compiled form of the given pattern. The syntax of
670 * the compiled pattern is:
671 * <blockquote>
672 * CompiledPattern:
673 * EntryList
674 * EntryList:
675 * Entry
676 * EntryList Entry
677 * Entry:
678 * TagField
679 * TagField data
680 * TagField:
681 * Tag Length
682 * TaggedData
683 * Tag:
684 * pattern_char_index
685 * TAG_QUOTE_CHARS
686 * Length:
687 * short_length
688 * long_length
689 * TaggedData:
690 * TAG_QUOTE_ASCII_CHAR ascii_char
691 *
692 * </blockquote>
693 *
694 * where `short_length' is an 8-bit unsigned integer between 0 and
695 * 254. `long_length' is a sequence of an 8-bit integer 255 and a
696 * 32-bit signed integer value which is split into upper and lower
697 * 16-bit fields in two char's. `pattern_char_index' is an 8-bit
698 * integer between 0 and 18. `ascii_char' is an 7-bit ASCII
699 * character value. `data' depends on its Tag value.
700 * <p>
701 * If Length is short_length, Tag and short_length are packed in a
702 * single char, as illustrated below.
703 * <blockquote>
704 * char[0] = (Tag << 8) | short_length;
705 * </blockquote>
706 *
707 * If Length is long_length, Tag and 255 are packed in the first
708 * char and a 32-bit integer, as illustrated below.
709 * <blockquote>
710 * char[0] = (Tag << 8) | 255;
711 * char[1] = (char) (long_length >>> 16);
712 * char[2] = (char) (long_length & 0xffff);
713 * </blockquote>
714 * <p>
715 * If Tag is a pattern_char_index, its Length is the number of
716 * pattern characters. For example, if the given pattern is
717 * "yyyy", Tag is 1 and Length is 4, followed by no data.
718 * <p>
719 * If Tag is TAG_QUOTE_CHARS, its Length is the number of char's
720 * following the TagField. For example, if the given pattern is
721 * "'o''clock'", Length is 7 followed by a char sequence of
722 * <code>o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k</code>.
723 * <p>
724 * TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII
725 * character in place of Length. For example, if the given pattern
726 * is "'o'", the TaggedData entry is
727 * <code>((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o')</code>.
728 *
729 * @exception NullPointerException if the given pattern is null
730 * @exception IllegalArgumentException if the given pattern is invalid
731 */
732 private char[] compile(String pattern) {
733 int length = pattern.length();
734 boolean inQuote = false;
735 StringBuilder compiledCode = new StringBuilder(length * 2);
736 StringBuilder tmpBuffer = null;
737 int count = 0, tagcount = 0;
738 int lastTag = -1, prevTag = -1;
739
740 for (int i = 0; i < length; i++) {
741 char c = pattern.charAt(i);
742
743 if (c == '\'') {
744 // '' is treated as a single quote regardless of being
745 // in a quoted section.
746 if ((i + 1) < length) {
747 c = pattern.charAt(i + 1);
748 if (c == '\'') {
749 i++;
750 if (count != 0) {
751 encode(lastTag, count, compiledCode);
752 tagcount++;
753 prevTag = lastTag;
754 lastTag = -1;
755 count = 0;
756 }
757 if (inQuote) {
758 tmpBuffer.append(c);
759 } else {
760 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c));
761 }
762 continue;
763 }
764 }
765 if (!inQuote) {
766 if (count != 0) {
767 encode(lastTag, count, compiledCode);
768 tagcount++;
769 prevTag = lastTag;
770 lastTag = -1;
771 count = 0;
772 }
773 if (tmpBuffer == null) {
774 tmpBuffer = new StringBuilder(length);
775 } else {
776 tmpBuffer.setLength(0);
777 }
778 inQuote = true;
779 } else {
780 int len = tmpBuffer.length();
781 if (len == 1) {
782 char ch = tmpBuffer.charAt(0);
783 if (ch < 128) {
784 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | ch));
785 } else {
786 compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | 1));
787 compiledCode.append(ch);
788 }
789 } else {
790 encode(TAG_QUOTE_CHARS, len, compiledCode);
791 compiledCode.append(tmpBuffer);
792 }
793 inQuote = false;
794 }
795 continue;
796 }
797 if (inQuote) {
798 tmpBuffer.append(c);
799 continue;
800 }
801 if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')) {
802 if (count != 0) {
803 encode(lastTag, count, compiledCode);
804 tagcount++;
805 prevTag = lastTag;
806 lastTag = -1;
807 count = 0;
808 }
809 if (c < 128) {
810 // In most cases, c would be a delimiter, such as ':'.
811 compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c));
812 } else {
813 // Take any contiguous non-ASCII alphabet characters and
814 // put them in a single TAG_QUOTE_CHARS.
815 int j;
816 for (j = i + 1; j < length; j++) {
817 char d = pattern.charAt(j);
818 if (d == '\'' || (d >= 'a' && d <= 'z' || d >= 'A' && d <= 'Z')) {
819 break;
820 }
821 }
822 compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | (j - i)));
823 for (; i < j; i++) {
824 compiledCode.append(pattern.charAt(i));
825 }
826 i--;
827 }
828 continue;
829 }
830
831 int tag;
832 if ((tag = DateFormatSymbols.patternChars.indexOf(c)) == -1) {
833 throw new IllegalArgumentException("Illegal pattern character " +
834 "'" + c + "'");
835 }
836 if (lastTag == -1 || lastTag == tag) {
837 lastTag = tag;
838 count++;
839 continue;
840 }
841 encode(lastTag, count, compiledCode);
842 tagcount++;
843 prevTag = lastTag;
844 lastTag = tag;
845 count = 1;
846 }
847
848 if (inQuote) {
849 throw new IllegalArgumentException("Unterminated quote");
850 }
851
852 if (count != 0) {
853 encode(lastTag, count, compiledCode);
854 tagcount++;
855 prevTag = lastTag;
856 }
857
858 forceStandaloneForm = (tagcount == 1 && prevTag == PATTERN_MONTH);
859
860 // Copy the compiled pattern to a char array
861 int len = compiledCode.length();
862 char[] r = new char[len];
863 compiledCode.getChars(0, len, r, 0);
864 return r;
865 }
866
867 /**
868 * Encodes the given tag and length and puts encoded char(s) into buffer.
869 */
870 private static void encode(int tag, int length, StringBuilder buffer) {
871 if (tag == PATTERN_ISO_ZONE && length >= 4) {
872 throw new IllegalArgumentException("invalid ISO 8601 format: length=" + length);
873 }
874 if (length < 255) {
875 buffer.append((char)(tag << 8 | length));
876 } else {
877 buffer.append((char)((tag << 8) | 0xff));
878 buffer.append((char)(length >>> 16));
879 buffer.append((char)(length & 0xffff));
880 }
881 }
882
883 /* Initialize the fields we use to disambiguate ambiguous years. Separate
884 * so we can call it from readObject().
885 */
886 private void initializeDefaultCentury() {
887 calendar.setTimeInMillis(System.currentTimeMillis());
888 calendar.add( Calendar.YEAR, -80 );
889 parseAmbiguousDatesAsAfter(calendar.getTime());
890 }
891
892 /* Define one-century window into which to disambiguate dates using
893 * two-digit years.
894 */
895 private void parseAmbiguousDatesAsAfter(Date startDate) {
896 defaultCenturyStart = startDate;
897 calendar.setTime(startDate);
898 defaultCenturyStartYear = calendar.get(Calendar.YEAR);
899 }
900
901 /**
902 * Sets the 100-year period 2-digit years will be interpreted as being in
903 * to begin on the date the user specifies.
904 *
905 * @param startDate During parsing, two digit years will be placed in the range
906 * <code>startDate</code> to <code>startDate + 100 years</code>.
907 * @see #get2DigitYearStart
908 * @throws NullPointerException if {@code startDate} is {@code null}.
909 * @since 1.2
910 */
911 public void set2DigitYearStart(Date startDate) {
912 parseAmbiguousDatesAsAfter(new Date(startDate.getTime()));
913 }
914
915 /**
916 * Returns the beginning date of the 100-year period 2-digit years are interpreted
917 * as being within.
918 *
919 * @return the start of the 100-year period into which two digit years are
920 * parsed
921 * @see #set2DigitYearStart
922 * @since 1.2
923 */
924 public Date get2DigitYearStart() {
925 return (Date) defaultCenturyStart.clone();
926 }
927
928 /**
929 * Formats the given <code>Date</code> into a date/time string and appends
930 * the result to the given <code>StringBuffer</code>.
931 *
932 * @param date the date-time value to be formatted into a date-time string.
933 * @param toAppendTo where the new date-time text is to be appended.
934 * @param pos the formatting position. On input: an alignment field,
935 * if desired. On output: the offsets of the alignment field.
936 * @return the formatted date-time string.
937 * @exception NullPointerException if any of the parameters is {@code null}.
938 */
939 @Override
940 public StringBuffer format(Date date, StringBuffer toAppendTo,
941 FieldPosition pos)
942 {
943 pos.beginIndex = pos.endIndex = 0;
944 return format(date, toAppendTo, pos.getFieldDelegate());
945 }
946
947 // Called from Format after creating a FieldDelegate
948 private StringBuffer format(Date date, StringBuffer toAppendTo,
949 FieldDelegate delegate) {
950 // Convert input date to time field list
951 calendar.setTime(date);
952
953 boolean useDateFormatSymbols = useDateFormatSymbols();
954
955 for (int i = 0; i < compiledPattern.length; ) {
956 int tag = compiledPattern[i] >>> 8;
957 int count = compiledPattern[i++] & 0xff;
958 if (count == 255) {
959 count = compiledPattern[i++] << 16;
960 count |= compiledPattern[i++];
961 }
962
963 switch (tag) {
964 case TAG_QUOTE_ASCII_CHAR:
965 toAppendTo.append((char)count);
966 break;
967
968 case TAG_QUOTE_CHARS:
969 toAppendTo.append(compiledPattern, i, count);
970 i += count;
971 break;
972
973 default:
974 subFormat(tag, count, delegate, toAppendTo, useDateFormatSymbols);
975 break;
976 }
977 }
978 return toAppendTo;
979 }
980
981 /**
982 * Formats an Object producing an <code>AttributedCharacterIterator</code>.
983 * You can use the returned <code>AttributedCharacterIterator</code>
984 * to build the resulting String, as well as to determine information
985 * about the resulting String.
986 * <p>
987 * Each attribute key of the AttributedCharacterIterator will be of type
988 * <code>DateFormat.Field</code>, with the corresponding attribute value
989 * being the same as the attribute key.
990 *
991 * @exception NullPointerException if obj is null.
992 * @exception IllegalArgumentException if the Format cannot format the
993 * given object, or if the Format's pattern string is invalid.
994 * @param obj The object to format
995 * @return AttributedCharacterIterator describing the formatted value.
996 * @since 1.4
997 */
998 @Override
999 public AttributedCharacterIterator formatToCharacterIterator(Object obj) {
1000 StringBuffer sb = new StringBuffer();
1001 CharacterIteratorFieldDelegate delegate = new
1002 CharacterIteratorFieldDelegate();
1003
1004 if (obj instanceof Date) {
1005 format((Date)obj, sb, delegate);
1006 }
1007 else if (obj instanceof Number) {
1008 format(new Date(((Number)obj).longValue()), sb, delegate);
1009 }
1010 else if (obj == null) {
1011 throw new NullPointerException(
1012 "formatToCharacterIterator must be passed non-null object");
1013 }
1014 else {
1015 throw new IllegalArgumentException(
1016 "Cannot format given Object as a Date");
1017 }
1018 return delegate.getIterator(sb.toString());
1019 }
1020
1021 // Map index into pattern character string to Calendar field number
1022 private static final int[] PATTERN_INDEX_TO_CALENDAR_FIELD = {
1023 Calendar.ERA,
1024 Calendar.YEAR,
1025 Calendar.MONTH,
1026 Calendar.DATE,
1027 Calendar.HOUR_OF_DAY,
1028 Calendar.HOUR_OF_DAY,
1029 Calendar.MINUTE,
1030 Calendar.SECOND,
1031 Calendar.MILLISECOND,
1032 Calendar.DAY_OF_WEEK,
1033 Calendar.DAY_OF_YEAR,
1034 Calendar.DAY_OF_WEEK_IN_MONTH,
1035 Calendar.WEEK_OF_YEAR,
1036 Calendar.WEEK_OF_MONTH,
1037 Calendar.AM_PM,
1038 Calendar.HOUR,
1039 Calendar.HOUR,
1040 Calendar.ZONE_OFFSET,
1041 Calendar.ZONE_OFFSET,
1042 CalendarBuilder.WEEK_YEAR, // Pseudo Calendar field
1043 CalendarBuilder.ISO_DAY_OF_WEEK, // Pseudo Calendar field
1044 Calendar.ZONE_OFFSET,
1045 Calendar.MONTH
1046 };
1047
1048 // Map index into pattern character string to DateFormat field number
1049 private static final int[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD = {
1050 DateFormat.ERA_FIELD,
1051 DateFormat.YEAR_FIELD,
1052 DateFormat.MONTH_FIELD,
1053 DateFormat.DATE_FIELD,
1054 DateFormat.HOUR_OF_DAY1_FIELD,
1055 DateFormat.HOUR_OF_DAY0_FIELD,
1056 DateFormat.MINUTE_FIELD,
1057 DateFormat.SECOND_FIELD,
1058 DateFormat.MILLISECOND_FIELD,
1059 DateFormat.DAY_OF_WEEK_FIELD,
1060 DateFormat.DAY_OF_YEAR_FIELD,
1061 DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD,
1062 DateFormat.WEEK_OF_YEAR_FIELD,
1063 DateFormat.WEEK_OF_MONTH_FIELD,
1064 DateFormat.AM_PM_FIELD,
1065 DateFormat.HOUR1_FIELD,
1066 DateFormat.HOUR0_FIELD,
1067 DateFormat.TIMEZONE_FIELD,
1068 DateFormat.TIMEZONE_FIELD,
1069 DateFormat.YEAR_FIELD,
1070 DateFormat.DAY_OF_WEEK_FIELD,
1071 DateFormat.TIMEZONE_FIELD,
1072 DateFormat.MONTH_FIELD
1073 };
1074
1075 // Maps from DecimalFormatSymbols index to Field constant
1076 private static final Field[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID = {
1077 Field.ERA,
1078 Field.YEAR,
1079 Field.MONTH,
1080 Field.DAY_OF_MONTH,
1081 Field.HOUR_OF_DAY1,
1082 Field.HOUR_OF_DAY0,
1083 Field.MINUTE,
1084 Field.SECOND,
1085 Field.MILLISECOND,
1086 Field.DAY_OF_WEEK,
1087 Field.DAY_OF_YEAR,
1088 Field.DAY_OF_WEEK_IN_MONTH,
1089 Field.WEEK_OF_YEAR,
1090 Field.WEEK_OF_MONTH,
1091 Field.AM_PM,
1092 Field.HOUR1,
1093 Field.HOUR0,
1094 Field.TIME_ZONE,
1095 Field.TIME_ZONE,
1096 Field.YEAR,
1097 Field.DAY_OF_WEEK,
1098 Field.TIME_ZONE,
1099 Field.MONTH
1100 };
1101
1102 /**
1103 * Private member function that does the real date/time formatting.
1104 */
1105 private void subFormat(int patternCharIndex, int count,
1106 FieldDelegate delegate, StringBuffer buffer,
1107 boolean useDateFormatSymbols)
1108 {
1109 int maxIntCount = Integer.MAX_VALUE;
1110 String current = null;
1111 int beginOffset = buffer.length();
1112
1113 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1114 int value;
1115 if (field == CalendarBuilder.WEEK_YEAR) {
1116 if (calendar.isWeekDateSupported()) {
1117 value = calendar.getWeekYear();
1118 } else {
1119 // use calendar year 'y' instead
1120 patternCharIndex = PATTERN_YEAR;
1121 field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1122 value = calendar.get(field);
1123 }
1124 } else if (field == CalendarBuilder.ISO_DAY_OF_WEEK) {
1125 value = CalendarBuilder.toISODayOfWeek(calendar.get(Calendar.DAY_OF_WEEK));
1126 } else {
1127 value = calendar.get(field);
1128 }
1129
1130 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT;
1131 if (!useDateFormatSymbols && field < Calendar.ZONE_OFFSET
1132 && patternCharIndex != PATTERN_MONTH_STANDALONE) {
1133 current = calendar.getDisplayName(field, style, locale);
1134 }
1135
1136 // Note: zeroPaddingNumber() assumes that maxDigits is either
1137 // 2 or maxIntCount. If we make any changes to this,
1138 // zeroPaddingNumber() must be fixed.
1139
1140 switch (patternCharIndex) {
1141 case PATTERN_ERA: // 'G'
1142 if (useDateFormatSymbols) {
1143 String[] eras = formatData.getEras();
1144 if (value < eras.length) {
1145 current = eras[value];
1146 }
1147 }
1148 if (current == null) {
1149 current = "";
1150 }
1151 break;
1152
1153 case PATTERN_WEEK_YEAR: // 'Y'
1154 case PATTERN_YEAR: // 'y'
1155 if (calendar instanceof GregorianCalendar) {
1156 if (count != 2) {
1157 zeroPaddingNumber(value, count, maxIntCount, buffer);
1158 } else {
1159 zeroPaddingNumber(value, 2, 2, buffer);
1160 } // clip 1996 to 96
1161 } else {
1162 if (current == null) {
1163 zeroPaddingNumber(value, style == Calendar.LONG ? 1 : count,
1164 maxIntCount, buffer);
1165 }
1166 }
1167 break;
1168
1169 case PATTERN_MONTH: // 'M' (context seinsive)
1170 if (useDateFormatSymbols) {
1171 String[] months;
1172 if (count >= 4) {
1173 months = formatData.getMonths();
1174 current = months[value];
1175 } else if (count == 3) {
1176 months = formatData.getShortMonths();
1177 current = months[value];
1178 }
1179 } else {
1180 if (count < 3) {
1181 current = null;
1182 } else if (forceStandaloneForm) {
1183 current = calendar.getDisplayName(field, style | 0x8000, locale);
1184 if (current == null) {
1185 current = calendar.getDisplayName(field, style, locale);
1186 }
1187 }
1188 }
1189 if (current == null) {
1190 zeroPaddingNumber(value+1, count, maxIntCount, buffer);
1191 }
1192 break;
1193
1194 case PATTERN_MONTH_STANDALONE: // 'L'
1195 assert current == null;
1196 if (locale == null) {
1197 String[] months;
1198 if (count >= 4) {
1199 months = formatData.getMonths();
1200 current = months[value];
1201 } else if (count == 3) {
1202 months = formatData.getShortMonths();
1203 current = months[value];
1204 }
1205 } else {
1206 if (count >= 3) {
1207 current = calendar.getDisplayName(field, style | 0x8000, locale);
1208 }
1209 }
1210 if (current == null) {
1211 zeroPaddingNumber(value+1, count, maxIntCount, buffer);
1212 }
1213 break;
1214
1215 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59
1216 if (current == null) {
1217 if (value == 0) {
1218 zeroPaddingNumber(calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1,
1219 count, maxIntCount, buffer);
1220 } else {
1221 zeroPaddingNumber(value, count, maxIntCount, buffer);
1222 }
1223 }
1224 break;
1225
1226 case PATTERN_DAY_OF_WEEK: // 'E'
1227 if (useDateFormatSymbols) {
1228 String[] weekdays;
1229 if (count >= 4) {
1230 weekdays = formatData.getWeekdays();
1231 current = weekdays[value];
1232 } else { // count < 4, use abbreviated form if exists
1233 weekdays = formatData.getShortWeekdays();
1234 current = weekdays[value];
1235 }
1236 }
1237 break;
1238
1239 case PATTERN_AM_PM: // 'a'
1240 if (useDateFormatSymbols) {
1241 String[] ampm = formatData.getAmPmStrings();
1242 current = ampm[value];
1243 }
1244 break;
1245
1246 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM
1247 if (current == null) {
1248 if (value == 0) {
1249 zeroPaddingNumber(calendar.getLeastMaximum(Calendar.HOUR) + 1,
1250 count, maxIntCount, buffer);
1251 } else {
1252 zeroPaddingNumber(value, count, maxIntCount, buffer);
1253 }
1254 }
1255 break;
1256
1257 case PATTERN_ZONE_NAME: // 'z'
1258 if (current == null) {
1259 if (formatData.locale == null || formatData.isZoneStringsSet) {
1260 int zoneIndex =
1261 formatData.getZoneIndex(calendar.getTimeZone().getID());
1262 if (zoneIndex == -1) {
1263 value = calendar.get(Calendar.ZONE_OFFSET) +
1264 calendar.get(Calendar.DST_OFFSET);
1265 buffer.append(ZoneInfoFile.toCustomID(value));
1266 } else {
1267 int index = (calendar.get(Calendar.DST_OFFSET) == 0) ? 1: 3;
1268 if (count < 4) {
1269 // Use the short name
1270 index++;
1271 }
1272 String[][] zoneStrings = formatData.getZoneStringsWrapper();
1273 buffer.append(zoneStrings[zoneIndex][index]);
1274 }
1275 } else {
1276 TimeZone tz = calendar.getTimeZone();
1277 boolean daylight = (calendar.get(Calendar.DST_OFFSET) != 0);
1278 int tzstyle = (count < 4 ? TimeZone.SHORT : TimeZone.LONG);
1279 buffer.append(tz.getDisplayName(daylight, tzstyle, formatData.locale));
1280 }
1281 }
1282 break;
1283
1284 case PATTERN_ZONE_VALUE: // 'Z' ("-/+hhmm" form)
1285 value = (calendar.get(Calendar.ZONE_OFFSET) +
1286 calendar.get(Calendar.DST_OFFSET)) / 60000;
1287
1288 int width = 4;
1289 if (value >= 0) {
1290 buffer.append('+');
1291 } else {
1292 width++;
1293 }
1294
1295 int num = (value / 60) * 100 + (value % 60);
1296 CalendarUtils.sprintf0d(buffer, num, width);
1297 break;
1298
1299 case PATTERN_ISO_ZONE: // 'X'
1300 value = calendar.get(Calendar.ZONE_OFFSET)
1301 + calendar.get(Calendar.DST_OFFSET);
1302
1303 if (value == 0) {
1304 buffer.append('Z');
1305 break;
1306 }
1307
1308 value /= 60000;
1309 if (value >= 0) {
1310 buffer.append('+');
1311 } else {
1312 buffer.append('-');
1313 value = -value;
1314 }
1315
1316 CalendarUtils.sprintf0d(buffer, value / 60, 2);
1317 if (count == 1) {
1318 break;
1319 }
1320
1321 if (count == 3) {
1322 buffer.append(':');
1323 }
1324 CalendarUtils.sprintf0d(buffer, value % 60, 2);
1325 break;
1326
1327 default:
1328 // case PATTERN_DAY_OF_MONTH: // 'd'
1329 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59
1330 // case PATTERN_MINUTE: // 'm'
1331 // case PATTERN_SECOND: // 's'
1332 // case PATTERN_MILLISECOND: // 'S'
1333 // case PATTERN_DAY_OF_YEAR: // 'D'
1334 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F'
1335 // case PATTERN_WEEK_OF_YEAR: // 'w'
1336 // case PATTERN_WEEK_OF_MONTH: // 'W'
1337 // case PATTERN_HOUR0: // 'K' eg, 11PM + 1 hour =>> 0 AM
1338 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' pseudo field, Monday = 1, ..., Sunday = 7
1339 if (current == null) {
1340 zeroPaddingNumber(value, count, maxIntCount, buffer);
1341 }
1342 break;
1343 } // switch (patternCharIndex)
1344
1345 if (current != null) {
1346 buffer.append(current);
1347 }
1348
1349 int fieldID = PATTERN_INDEX_TO_DATE_FORMAT_FIELD[patternCharIndex];
1350 Field f = PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID[patternCharIndex];
1351
1352 delegate.formatted(fieldID, f, f, beginOffset, buffer.length(), buffer);
1353 }
1354
1355 /**
1356 * Formats a number with the specified minimum and maximum number of digits.
1357 */
1358 private void zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer)
1359 {
1360 // Optimization for 1, 2 and 4 digit numbers. This should
1361 // cover most cases of formatting date/time related items.
1362 // Note: This optimization code assumes that maxDigits is
1363 // either 2 or Integer.MAX_VALUE (maxIntCount in format()).
1364 try {
1365 if (zeroDigit == 0) {
1366 zeroDigit = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getZeroDigit();
1367 }
1368 if (value >= 0) {
1369 if (value < 100 && minDigits >= 1 && minDigits <= 2) {
1370 if (value < 10) {
1371 if (minDigits == 2) {
1372 buffer.append(zeroDigit);
1373 }
1374 buffer.append((char)(zeroDigit + value));
1375 } else {
1376 buffer.append((char)(zeroDigit + value / 10));
1377 buffer.append((char)(zeroDigit + value % 10));
1378 }
1379 return;
1380 } else if (value >= 1000 && value < 10000) {
1381 if (minDigits == 4) {
1382 buffer.append((char)(zeroDigit + value / 1000));
1383 value %= 1000;
1384 buffer.append((char)(zeroDigit + value / 100));
1385 value %= 100;
1386 buffer.append((char)(zeroDigit + value / 10));
1387 buffer.append((char)(zeroDigit + value % 10));
1388 return;
1389 }
1390 if (minDigits == 2 && maxDigits == 2) {
1391 zeroPaddingNumber(value % 100, 2, 2, buffer);
1392 return;
1393 }
1394 }
1395 }
1396 } catch (Exception e) {
1397 }
1398
1399 numberFormat.setMinimumIntegerDigits(minDigits);
1400 numberFormat.setMaximumIntegerDigits(maxDigits);
1401 numberFormat.format((long)value, buffer, DontCareFieldPosition.INSTANCE);
1402 }
1403
1404
1405 /**
1406 * Parses text from a string to produce a <code>Date</code>.
1407 * <p>
1408 * The method attempts to parse text starting at the index given by
1409 * <code>pos</code>.
1410 * If parsing succeeds, then the index of <code>pos</code> is updated
1411 * to the index after the last character used (parsing does not necessarily
1412 * use all characters up to the end of the string), and the parsed
1413 * date is returned. The updated <code>pos</code> can be used to
1414 * indicate the starting point for the next call to this method.
1415 * If an error occurs, then the index of <code>pos</code> is not
1416 * changed, the error index of <code>pos</code> is set to the index of
1417 * the character where the error occurred, and null is returned.
1418 *
1419 * <p>This parsing operation uses the {@link DateFormat#calendar
1420 * calendar} to produce a {@code Date}. All of the {@code
1421 * calendar}'s date-time fields are {@linkplain Calendar#clear()
1422 * cleared} before parsing, and the {@code calendar}'s default
1423 * values of the date-time fields are used for any missing
1424 * date-time information. For example, the year value of the
1425 * parsed {@code Date} is 1970 with {@link GregorianCalendar} if
1426 * no year value is given from the parsing operation. The {@code
1427 * TimeZone} value may be overwritten, depending on the given
1428 * pattern and the time zone value in {@code text}. Any {@code
1429 * TimeZone} value that has previously been set by a call to
1430 * {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need
1431 * to be restored for further operations.
1432 *
1433 * @param text A <code>String</code>, part of which should be parsed.
1434 * @param pos A <code>ParsePosition</code> object with index and error
1435 * index information as described above.
1436 * @return A <code>Date</code> parsed from the string. In case of
1437 * error, returns null.
1438 * @exception NullPointerException if <code>text</code> or <code>pos</code> is null.
1439 */
1440 @Override
1441 public Date parse(String text, ParsePosition pos)
1442 {
1443 checkNegativeNumberExpression();
1444
1445 int start = pos.index;
1446 int oldStart = start;
1447 int textLength = text.length();
1448
1449 boolean[] ambiguousYear = {false};
1450
1451 CalendarBuilder calb = new CalendarBuilder();
1452
1453 for (int i = 0; i < compiledPattern.length; ) {
1454 int tag = compiledPattern[i] >>> 8;
1455 int count = compiledPattern[i++] & 0xff;
1456 if (count == 255) {
1457 count = compiledPattern[i++] << 16;
1458 count |= compiledPattern[i++];
1459 }
1460
1461 switch (tag) {
1462 case TAG_QUOTE_ASCII_CHAR:
1463 if (start >= textLength || text.charAt(start) != (char)count) {
1464 pos.index = oldStart;
1465 pos.errorIndex = start;
1466 return null;
1467 }
1468 start++;
1469 break;
1470
1471 case TAG_QUOTE_CHARS:
1472 while (count-- > 0) {
1473 if (start >= textLength || text.charAt(start) != compiledPattern[i++]) {
1474 pos.index = oldStart;
1475 pos.errorIndex = start;
1476 return null;
1477 }
1478 start++;
1479 }
1480 break;
1481
1482 default:
1483 // Peek the next pattern to determine if we need to
1484 // obey the number of pattern letters for
1485 // parsing. It's required when parsing contiguous
1486 // digit text (e.g., "20010704") with a pattern which
1487 // has no delimiters between fields, like "yyyyMMdd".
1488 boolean obeyCount = false;
1489
1490 // In Arabic, a minus sign for a negative number is put after
1491 // the number. Even in another locale, a minus sign can be
1492 // put after a number using DateFormat.setNumberFormat().
1493 // If both the minus sign and the field-delimiter are '-',
1494 // subParse() needs to determine whether a '-' after a number
1495 // in the given text is a delimiter or is a minus sign for the
1496 // preceding number. We give subParse() a clue based on the
1497 // information in compiledPattern.
1498 boolean useFollowingMinusSignAsDelimiter = false;
1499
1500 if (i < compiledPattern.length) {
1501 int nextTag = compiledPattern[i] >>> 8;
1502 int nextCount = compiledPattern[i] & 0xff;
1503 obeyCount = shouldObeyCount(nextTag, nextCount);
1504
1505 if (hasFollowingMinusSign &&
1506 (nextTag == TAG_QUOTE_ASCII_CHAR ||
1507 nextTag == TAG_QUOTE_CHARS)) {
1508
1509 if (nextTag != TAG_QUOTE_ASCII_CHAR) {
1510 nextCount = compiledPattern[i+1];
1511 }
1512
1513 if (nextCount == minusSign) {
1514 useFollowingMinusSignAsDelimiter = true;
1515 }
1516 }
1517 }
1518 start = subParse(text, start, tag, count, obeyCount,
1519 ambiguousYear, pos,
1520 useFollowingMinusSignAsDelimiter, calb);
1521 if (start < 0) {
1522 pos.index = oldStart;
1523 return null;
1524 }
1525 }
1526 }
1527
1528 // At this point the fields of Calendar have been set. Calendar
1529 // will fill in default values for missing fields when the time
1530 // is computed.
1531
1532 pos.index = start;
1533
1534 Date parsedDate;
1535 try {
1536 parsedDate = calb.establish(calendar).getTime();
1537 // If the year value is ambiguous,
1538 // then the two-digit year == the default start year
1539 if (ambiguousYear[0]) {
1540 if (parsedDate.before(defaultCenturyStart)) {
1541 parsedDate = calb.addYear(100).establish(calendar).getTime();
1542 }
1543 }
1544 }
1545 // An IllegalArgumentException will be thrown by Calendar.getTime()
1546 // if any fields are out of range, e.g., MONTH == 17.
1547 catch (IllegalArgumentException e) {
1548 pos.errorIndex = start;
1549 pos.index = oldStart;
1550 return null;
1551 }
1552
1553 return parsedDate;
1554 }
1555
1556 /* If the next tag/pattern is a <Numeric_Field> then the parser
1557 * should consider the count of digits while parsing the contigous digits
1558 * for the current tag/pattern
1559 */
1560 private boolean shouldObeyCount(int tag, int count) {
1561 switch (tag) {
1562 case PATTERN_MONTH:
1563 case PATTERN_MONTH_STANDALONE:
1564 return count <= 2;
1565 case PATTERN_YEAR:
1566 case PATTERN_DAY_OF_MONTH:
1567 case PATTERN_HOUR_OF_DAY1:
1568 case PATTERN_HOUR_OF_DAY0:
1569 case PATTERN_MINUTE:
1570 case PATTERN_SECOND:
1571 case PATTERN_MILLISECOND:
1572 case PATTERN_DAY_OF_YEAR:
1573 case PATTERN_DAY_OF_WEEK_IN_MONTH:
1574 case PATTERN_WEEK_OF_YEAR:
1575 case PATTERN_WEEK_OF_MONTH:
1576 case PATTERN_HOUR1:
1577 case PATTERN_HOUR0:
1578 case PATTERN_WEEK_YEAR:
1579 case PATTERN_ISO_DAY_OF_WEEK:
1580 return true;
1581 default:
1582 return false;
1583 }
1584 }
1585
1586 /**
1587 * Private code-size reduction function used by subParse.
1588 * @param text the time text being parsed.
1589 * @param start where to start parsing.
1590 * @param field the date field being parsed.
1591 * @param data the string array to parsed.
1592 * @return the new start position if matching succeeded; a negative number
1593 * indicating matching failure, otherwise.
1594 */
1595 private int matchString(String text, int start, int field, String[] data, CalendarBuilder calb)
1596 {
1597 int i = 0;
1598 int count = data.length;
1599
1600 if (field == Calendar.DAY_OF_WEEK) {
1601 i = 1;
1602 }
1603
1604 // There may be multiple strings in the data[] array which begin with
1605 // the same prefix (e.g., Cerven and Cervenec (June and July) in Czech).
1606 // We keep track of the longest match, and return that. Note that this
1607 // unfortunately requires us to test all array elements.
1608 int bestMatchLength = 0, bestMatch = -1;
1609 for (; i<count; ++i)
1610 {
1611 int length = data[i].length();
1612 // Always compare if we have no match yet; otherwise only compare
1613 // against potentially better matches (longer strings).
1614 if (length > bestMatchLength &&
1615 text.regionMatches(true, start, data[i], 0, length))
1616 {
1617 bestMatch = i;
1618 bestMatchLength = length;
1619 }
1620 }
1621 if (bestMatch >= 0)
1622 {
1623 calb.set(field, bestMatch);
1624 return start + bestMatchLength;
1625 }
1626 return -start;
1627 }
1628
1629 /**
1630 * Performs the same thing as matchString(String, int, int,
1631 * String[]). This method takes a Map<String, Integer> instead of
1632 * String[].
1633 */
1634 private int matchString(String text, int start, int field,
1635 Map<String,Integer> data, CalendarBuilder calb) {
1636 if (data != null) {
1637 // TODO: make this default when it's in the spec.
1638 if (data instanceof SortedMap) {
1639 for (String name : data.keySet()) {
1640 if (text.regionMatches(true, start, name, 0, name.length())) {
1641 calb.set(field, data.get(name));
1642 return start + name.length();
1643 }
1644 }
1645 return -start;
1646 }
1647
1648 String bestMatch = null;
1649
1650 for (String name : data.keySet()) {
1651 int length = name.length();
1652 if (bestMatch == null || length > bestMatch.length()) {
1653 if (text.regionMatches(true, start, name, 0, length)) {
1654 bestMatch = name;
1655 }
1656 }
1657 }
1658
1659 if (bestMatch != null) {
1660 calb.set(field, data.get(bestMatch));
1661 return start + bestMatch.length();
1662 }
1663 }
1664 return -start;
1665 }
1666
1667 private int matchZoneString(String text, int start, String[] zoneNames) {
1668 for (int i = 1; i <= 4; ++i) {
1669 // Checking long and short zones [1 & 2],
1670 // and long and short daylight [3 & 4].
1671 String zoneName = zoneNames[i];
1672 if (text.regionMatches(true, start,
1673 zoneName, 0, zoneName.length())) {
1674 return i;
1675 }
1676 }
1677 return -1;
1678 }
1679
1680 private boolean matchDSTString(String text, int start, int zoneIndex, int standardIndex,
1681 String[][] zoneStrings) {
1682 int index = standardIndex + 2;
1683 String zoneName = zoneStrings[zoneIndex][index];
1684 if (text.regionMatches(true, start,
1685 zoneName, 0, zoneName.length())) {
1686 return true;
1687 }
1688 return false;
1689 }
1690
1691 /**
1692 * find time zone 'text' matched zoneStrings and set to internal
1693 * calendar.
1694 */
1695 private int subParseZoneString(String text, int start, CalendarBuilder calb) {
1696 boolean useSameName = false; // true if standard and daylight time use the same abbreviation.
1697 TimeZone currentTimeZone = getTimeZone();
1698
1699 // At this point, check for named time zones by looking through
1700 // the locale data from the TimeZoneNames strings.
1701 // Want to be able to parse both short and long forms.
1702 int zoneIndex = formatData.getZoneIndex(currentTimeZone.getID());
1703 TimeZone tz = null;
1704 String[][] zoneStrings = formatData.getZoneStringsWrapper();
1705 String[] zoneNames = null;
1706 int nameIndex = 0;
1707 if (zoneIndex != -1) {
1708 zoneNames = zoneStrings[zoneIndex];
1709 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1710 if (nameIndex <= 2) {
1711 // Check if the standard name (abbr) and the daylight name are the same.
1712 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1713 }
1714 tz = TimeZone.getTimeZone(zoneNames[0]);
1715 }
1716 }
1717 if (tz == null) {
1718 zoneIndex = formatData.getZoneIndex(TimeZone.getDefault().getID());
1719 if (zoneIndex != -1) {
1720 zoneNames = zoneStrings[zoneIndex];
1721 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1722 if (nameIndex <= 2) {
1723 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1724 }
1725 tz = TimeZone.getTimeZone(zoneNames[0]);
1726 }
1727 }
1728 }
1729
1730 if (tz == null) {
1731 int len = zoneStrings.length;
1732 for (int i = 0; i < len; i++) {
1733 zoneNames = zoneStrings[i];
1734 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1735 if (nameIndex <= 2) {
1736 useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1737 }
1738 tz = TimeZone.getTimeZone(zoneNames[0]);
1739 break;
1740 }
1741 }
1742 }
1743 if (tz != null) { // Matched any ?
1744 if (!tz.equals(currentTimeZone)) {
1745 setTimeZone(tz);
1746 }
1747 // If the time zone matched uses the same name
1748 // (abbreviation) for both standard and daylight time,
1749 // let the time zone in the Calendar decide which one.
1750 //
1751 // Also if tz.getDSTSaving() returns 0 for DST, use tz to
1752 // determine the local time. (6645292)
1753 int dstAmount = (nameIndex >= 3) ? tz.getDSTSavings() : 0;
1754 if (!(useSameName || (nameIndex >= 3 && dstAmount == 0))) {
1755 calb.clear(Calendar.ZONE_OFFSET).set(Calendar.DST_OFFSET, dstAmount);
1756 }
1757 return (start + zoneNames[nameIndex].length());
1758 }
1759 return -start;
1760 }
1761
1762 /**
1763 * Parses numeric forms of time zone offset, such as "hh:mm", and
1764 * sets calb to the parsed value.
1765 *
1766 * @param text the text to be parsed
1767 * @param start the character position to start parsing
1768 * @param sign 1: positive; -1: negative
1769 * @param count 0: 'Z' or "GMT+hh:mm" parsing; 1 - 3: the number of 'X's
1770 * @param colon true - colon required between hh and mm; false - no colon required
1771 * @param calb a CalendarBuilder in which the parsed value is stored
1772 * @return updated parsed position, or its negative value to indicate a parsing error
1773 */
1774 private int subParseNumericZone(String text, int start, int sign, int count,
1775 boolean colon, CalendarBuilder calb) {
1776 int index = start;
1777
1778 parse:
1779 try {
1780 char c = text.charAt(index++);
1781 // Parse hh
1782 int hours;
1783 if (!isDigit(c)) {
1784 break parse;
1785 }
1786 hours = c - '0';
1787 c = text.charAt(index++);
1788 if (isDigit(c)) {
1789 hours = hours * 10 + (c - '0');
1790 } else {
1791 // If no colon in RFC 822 or 'X' (ISO), two digits are
1792 // required.
1793 if (count > 0 || !colon) {
1794 break parse;
1795 }
1796 --index;
1797 }
1798 if (hours > 23) {
1799 break parse;
1800 }
1801 int minutes = 0;
1802 if (count != 1) {
1803 // Proceed with parsing mm
1804 c = text.charAt(index++);
1805 if (colon) {
1806 if (c != ':') {
1807 break parse;
1808 }
1809 c = text.charAt(index++);
1810 }
1811 if (!isDigit(c)) {
1812 break parse;
1813 }
1814 minutes = c - '0';
1815 c = text.charAt(index++);
1816 if (!isDigit(c)) {
1817 break parse;
1818 }
1819 minutes = minutes * 10 + (c - '0');
1820 if (minutes > 59) {
1821 break parse;
1822 }
1823 }
1824 minutes += hours * 60;
1825 calb.set(Calendar.ZONE_OFFSET, minutes * MILLIS_PER_MINUTE * sign)
1826 .set(Calendar.DST_OFFSET, 0);
1827 return index;
1828 } catch (IndexOutOfBoundsException e) {
1829 }
1830 return 1 - index; // -(index - 1)
1831 }
1832
1833 private boolean isDigit(char c) {
1834 return c >= '0' && c <= '9';
1835 }
1836
1837 /**
1838 * Private member function that converts the parsed date strings into
1839 * timeFields. Returns -start (for ParsePosition) if failed.
1840 * @param text the time text to be parsed.
1841 * @param start where to start parsing.
1842 * @param patternCharIndex the index of the pattern character.
1843 * @param count the count of a pattern character.
1844 * @param obeyCount if true, then the next field directly abuts this one,
1845 * and we should use the count to know when to stop parsing.
1846 * @param ambiguousYear return parameter; upon return, if ambiguousYear[0]
1847 * is true, then a two-digit year was parsed and may need to be readjusted.
1848 * @param origPos origPos.errorIndex is used to return an error index
1849 * at which a parse error occurred, if matching failure occurs.
1850 * @return the new start position if matching succeeded; -1 indicating
1851 * matching failure, otherwise. In case matching failure occurred,
1852 * an error index is set to origPos.errorIndex.
1853 */
1854 private int subParse(String text, int start, int patternCharIndex, int count,
1855 boolean obeyCount, boolean[] ambiguousYear,
1856 ParsePosition origPos,
1857 boolean useFollowingMinusSignAsDelimiter, CalendarBuilder calb) {
1858 Number number;
1859 int value = 0;
1860 ParsePosition pos = new ParsePosition(0);
1861 pos.index = start;
1862 if (patternCharIndex == PATTERN_WEEK_YEAR && !calendar.isWeekDateSupported()) {
1863 // use calendar year 'y' instead
1864 patternCharIndex = PATTERN_YEAR;
1865 }
1866 int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1867
1868 // If there are any spaces here, skip over them. If we hit the end
1869 // of the string, then fail.
1870 for (;;) {
1871 if (pos.index >= text.length()) {
1872 origPos.errorIndex = start;
1873 return -1;
1874 }
1875 char c = text.charAt(pos.index);
1876 if (c != ' ' && c != '\t') {
1877 break;
1878 }
1879 ++pos.index;
1880 }
1881 // Remember the actual start index
1882 int actualStart = pos.index;
1883
1884 parsing:
1885 {
1886 // We handle a few special cases here where we need to parse
1887 // a number value. We handle further, more generic cases below. We need
1888 // to handle some of them here because some fields require extra processing on
1889 // the parsed value.
1890 if (patternCharIndex == PATTERN_HOUR_OF_DAY1 ||
1891 patternCharIndex == PATTERN_HOUR1 ||
1892 (patternCharIndex == PATTERN_MONTH && count <= 2) ||
1893 (patternCharIndex == PATTERN_MONTH_STANDALONE && count <= 2) ||
1894 patternCharIndex == PATTERN_YEAR ||
1895 patternCharIndex == PATTERN_WEEK_YEAR) {
1896 // It would be good to unify this with the obeyCount logic below,
1897 // but that's going to be difficult.
1898 if (obeyCount) {
1899 if ((start+count) > text.length()) {
1900 break parsing;
1901 }
1902 number = numberFormat.parse(text.substring(0, start+count), pos);
1903 } else {
1904 number = numberFormat.parse(text, pos);
1905 }
1906 if (number == null) {
1907 if (patternCharIndex != PATTERN_YEAR || calendar instanceof GregorianCalendar) {
1908 break parsing;
1909 }
1910 } else {
1911 value = number.intValue();
1912
1913 if (useFollowingMinusSignAsDelimiter && (value < 0) &&
1914 (((pos.index < text.length()) &&
1915 (text.charAt(pos.index) != minusSign)) ||
1916 ((pos.index == text.length()) &&
1917 (text.charAt(pos.index-1) == minusSign)))) {
1918 value = -value;
1919 pos.index--;
1920 }
1921 }
1922 }
1923
1924 boolean useDateFormatSymbols = useDateFormatSymbols();
1925
1926 int index;
1927 switch (patternCharIndex) {
1928 case PATTERN_ERA: // 'G'
1929 if (useDateFormatSymbols) {
1930 if ((index = matchString(text, start, Calendar.ERA, formatData.getEras(), calb)) > 0) {
1931 return index;
1932 }
1933 } else {
1934 Map<String, Integer> map = getDisplayNamesMap(field, locale);
1935 if ((index = matchString(text, start, field, map, calb)) > 0) {
1936 return index;
1937 }
1938 }
1939 break parsing;
1940
1941 case PATTERN_WEEK_YEAR: // 'Y'
1942 case PATTERN_YEAR: // 'y'
1943 if (!(calendar instanceof GregorianCalendar)) {
1944 // calendar might have text representations for year values,
1945 // such as "\u5143" in JapaneseImperialCalendar.
1946 int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT;
1947 Map<String, Integer> map = calendar.getDisplayNames(field, style, locale);
1948 if (map != null) {
1949 if ((index = matchString(text, start, field, map, calb)) > 0) {
1950 return index;
1951 }
1952 }
1953 calb.set(field, value);
1954 return pos.index;
1955 }
1956
1957 // If there are 3 or more YEAR pattern characters, this indicates
1958 // that the year value is to be treated literally, without any
1959 // two-digit year adjustments (e.g., from "01" to 2001). Otherwise
1960 // we made adjustments to place the 2-digit year in the proper
1961 // century, for parsed strings from "00" to "99". Any other string
1962 // is treated literally: "2250", "-1", "1", "002".
1963 if (count <= 2 && (pos.index - actualStart) == 2
1964 && Character.isDigit(text.charAt(actualStart))
1965 && Character.isDigit(text.charAt(actualStart + 1))) {
1966 // Assume for example that the defaultCenturyStart is 6/18/1903.
1967 // This means that two-digit years will be forced into the range
1968 // 6/18/1903 to 6/17/2003. As a result, years 00, 01, and 02
1969 // correspond to 2000, 2001, and 2002. Years 04, 05, etc. correspond
1970 // to 1904, 1905, etc. If the year is 03, then it is 2003 if the
1971 // other fields specify a date before 6/18, or 1903 if they specify a
1972 // date afterwards. As a result, 03 is an ambiguous year. All other
1973 // two-digit years are unambiguous.
1974 int ambiguousTwoDigitYear = defaultCenturyStartYear % 100;
1975 ambiguousYear[0] = value == ambiguousTwoDigitYear;
1976 value += (defaultCenturyStartYear/100)*100 +
1977 (value < ambiguousTwoDigitYear ? 100 : 0);
1978 }
1979 calb.set(field, value);
1980 return pos.index;
1981
1982 case PATTERN_MONTH: // 'M'
1983 if (count <= 2) // i.e., M or MM.
1984 {
1985 // Don't want to parse the month if it is a string
1986 // while pattern uses numeric style: M or MM.
1987 // [We computed 'value' above.]
1988 calb.set(Calendar.MONTH, value - 1);
1989 return pos.index;
1990 }
1991
1992 if (useDateFormatSymbols) {
1993 // count >= 3 // i.e., MMM or MMMM
1994 // Want to be able to parse both short and long forms.
1995 // Try count == 4 first:
1996 int newStart;
1997 if ((newStart = matchString(text, start, Calendar.MONTH,
1998 formatData.getMonths(), calb)) > 0) {
1999 return newStart;
2000 }
2001 // count == 4 failed, now try count == 3
2002 if ((index = matchString(text, start, Calendar.MONTH,
2003 formatData.getShortMonths(), calb)) > 0) {
2004 return index;
2005 }
2006 } else {
2007 Map<String, Integer> map = getDisplayNamesMap(field, locale);
2008 if ((index = matchString(text, start, field, map, calb)) > 0) {
2009 return index;
2010 }
2011 }
2012 break parsing;
2013
2014 case PATTERN_MONTH_STANDALONE: // 'L'
2015 if (count <= 2) {
2016 // Don't want to parse the month if it is a string
2017 // while pattern uses numeric style: L or LL
2018 //[we computed 'value' above.]
2019 calb.set(Calendar.MONTH, value - 1);
2020 return pos.index;
2021 }
2022 Map<String, Integer> maps = getDisplayNamesMap(field, locale);
2023 if ((index = matchString(text, start, field, maps, calb)) > 0) {
2024 return index;
2025 }
2026 break parsing;
2027
2028 case PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59
2029 if (!isLenient()) {
2030 // Validate the hour value in non-lenient
2031 if (value < 1 || value > 24) {
2032 break parsing;
2033 }
2034 }
2035 // [We computed 'value' above.]
2036 if (value == calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1) {
2037 value = 0;
2038 }
2039 calb.set(Calendar.HOUR_OF_DAY, value);
2040 return pos.index;
2041
2042 case PATTERN_DAY_OF_WEEK: // 'E'
2043 {
2044 if (useDateFormatSymbols) {
2045 // Want to be able to parse both short and long forms.
2046 // Try count == 4 (DDDD) first:
2047 int newStart;
2048 if ((newStart=matchString(text, start, Calendar.DAY_OF_WEEK,
2049 formatData.getWeekdays(), calb)) > 0) {
2050 return newStart;
2051 }
2052 // DDDD failed, now try DDD
2053 if ((index = matchString(text, start, Calendar.DAY_OF_WEEK,
2054 formatData.getShortWeekdays(), calb)) > 0) {
2055 return index;
2056 }
2057 } else {
2058 int[] styles = { Calendar.LONG, Calendar.SHORT };
2059 for (int style : styles) {
2060 Map<String,Integer> map = calendar.getDisplayNames(field, style, locale);
2061 if ((index = matchString(text, start, field, map, calb)) > 0) {
2062 return index;
2063 }
2064 }
2065 }
2066 }
2067 break parsing;
2068
2069 case PATTERN_AM_PM: // 'a'
2070 if (useDateFormatSymbols) {
2071 if ((index = matchString(text, start, Calendar.AM_PM,
2072 formatData.getAmPmStrings(), calb)) > 0) {
2073 return index;
2074 }
2075 } else {
2076 Map<String,Integer> map = getDisplayNamesMap(field, locale);
2077 if ((index = matchString(text, start, field, map, calb)) > 0) {
2078 return index;
2079 }
2080 }
2081 break parsing;
2082
2083 case PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM
2084 if (!isLenient()) {
2085 // Validate the hour value in non-lenient
2086 if (value < 1 || value > 12) {
2087 break parsing;
2088 }
2089 }
2090 // [We computed 'value' above.]
2091 if (value == calendar.getLeastMaximum(Calendar.HOUR) + 1) {
2092 value = 0;
2093 }
2094 calb.set(Calendar.HOUR, value);
2095 return pos.index;
2096
2097 case PATTERN_ZONE_NAME: // 'z'
2098 case PATTERN_ZONE_VALUE: // 'Z'
2099 {
2100 int sign = 0;
2101 try {
2102 char c = text.charAt(pos.index);
2103 if (c == '+') {
2104 sign = 1;
2105 } else if (c == '-') {
2106 sign = -1;
2107 }
2108 if (sign == 0) {
2109 // Try parsing a custom time zone "GMT+hh:mm" or "GMT".
2110 if ((c == 'G' || c == 'g')
2111 && (text.length() - start) >= GMT.length()
2112 && text.regionMatches(true, start, GMT, 0, GMT.length())) {
2113 pos.index = start + GMT.length();
2114
2115 if ((text.length() - pos.index) > 0) {
2116 c = text.charAt(pos.index);
2117 if (c == '+') {
2118 sign = 1;
2119 } else if (c == '-') {
2120 sign = -1;
2121 }
2122 }
2123
2124 if (sign == 0) { /* "GMT" without offset */
2125 calb.set(Calendar.ZONE_OFFSET, 0)
2126 .set(Calendar.DST_OFFSET, 0);
2127 return pos.index;
2128 }
2129
2130 // Parse the rest as "hh:mm"
2131 int i = subParseNumericZone(text, ++pos.index,
2132 sign, 0, true, calb);
2133 if (i > 0) {
2134 return i;
2135 }
2136 pos.index = -i;
2137 } else {
2138 // Try parsing the text as a time zone
2139 // name or abbreviation.
2140 int i = subParseZoneString(text, pos.index, calb);
2141 if (i > 0) {
2142 return i;
2143 }
2144 pos.index = -i;
2145 }
2146 } else {
2147 // Parse the rest as "hhmm" (RFC 822)
2148 int i = subParseNumericZone(text, ++pos.index,
2149 sign, 0, false, calb);
2150 if (i > 0) {
2151 return i;
2152 }
2153 pos.index = -i;
2154 }
2155 } catch (IndexOutOfBoundsException e) {
2156 }
2157 }
2158 break parsing;
2159
2160 case PATTERN_ISO_ZONE: // 'X'
2161 {
2162 if ((text.length() - pos.index) <= 0) {
2163 break parsing;
2164 }
2165
2166 int sign;
2167 char c = text.charAt(pos.index);
2168 if (c == 'Z') {
2169 calb.set(Calendar.ZONE_OFFSET, 0).set(Calendar.DST_OFFSET, 0);
2170 return ++pos.index;
2171 }
2172
2173 // parse text as "+/-hh[[:]mm]" based on count
2174 if (c == '+') {
2175 sign = 1;
2176 } else if (c == '-') {
2177 sign = -1;
2178 } else {
2179 ++pos.index;
2180 break parsing;
2181 }
2182 int i = subParseNumericZone(text, ++pos.index, sign, count,
2183 count == 3, calb);
2184 if (i > 0) {
2185 return i;
2186 }
2187 pos.index = -i;
2188 }
2189 break parsing;
2190
2191 default:
2192 // case PATTERN_DAY_OF_MONTH: // 'd'
2193 // case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59
2194 // case PATTERN_MINUTE: // 'm'
2195 // case PATTERN_SECOND: // 's'
2196 // case PATTERN_MILLISECOND: // 'S'
2197 // case PATTERN_DAY_OF_YEAR: // 'D'
2198 // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F'
2199 // case PATTERN_WEEK_OF_YEAR: // 'w'
2200 // case PATTERN_WEEK_OF_MONTH: // 'W'
2201 // case PATTERN_HOUR0: // 'K' 0-based. eg, 11PM + 1 hour =>> 0 AM
2202 // case PATTERN_ISO_DAY_OF_WEEK: // 'u' (pseudo field);
2203
2204 // Handle "generic" fields
2205 if (obeyCount) {
2206 if ((start+count) > text.length()) {
2207 break parsing;
2208 }
2209 number = numberFormat.parse(text.substring(0, start+count), pos);
2210 } else {
2211 number = numberFormat.parse(text, pos);
2212 }
2213 if (number != null) {
2214 value = number.intValue();
2215
2216 if (useFollowingMinusSignAsDelimiter && (value < 0) &&
2217 (((pos.index < text.length()) &&
2218 (text.charAt(pos.index) != minusSign)) ||
2219 ((pos.index == text.length()) &&
2220 (text.charAt(pos.index-1) == minusSign)))) {
2221 value = -value;
2222 pos.index--;
2223 }
2224
2225 calb.set(field, value);
2226 return pos.index;
2227 }
2228 break parsing;
2229 }
2230 }
2231
2232 // Parsing failed.
2233 origPos.errorIndex = pos.index;
2234 return -1;
2235 }
2236
2237 /**
2238 * Returns true if the DateFormatSymbols has been set explicitly or locale
2239 * is null.
2240 */
2241 private boolean useDateFormatSymbols() {
2242 return useDateFormatSymbols || locale == null;
2243 }
2244
2245 /**
2246 * Translates a pattern, mapping each character in the from string to the
2247 * corresponding character in the to string.
2248 *
2249 * @exception IllegalArgumentException if the given pattern is invalid
2250 */
2251 private String translatePattern(String pattern, String from, String to) {
2252 StringBuilder result = new StringBuilder();
2253 boolean inQuote = false;
2254 for (int i = 0; i < pattern.length(); ++i) {
2255 char c = pattern.charAt(i);
2256 if (inQuote) {
2257 if (c == '\'') {
2258 inQuote = false;
2259 }
2260 }
2261 else {
2262 if (c == '\'') {
2263 inQuote = true;
2264 } else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
2265 int ci = from.indexOf(c);
2266 if (ci >= 0) {
2267 // patternChars is longer than localPatternChars due
2268 // to serialization compatibility. The pattern letters
2269 // unsupported by localPatternChars pass through.
2270 if (ci < to.length()) {
2271 c = to.charAt(ci);
2272 }
2273 } else {
2274 throw new IllegalArgumentException("Illegal pattern " +
2275 " character '" +
2276 c + "'");
2277 }
2278 }
2279 }
2280 result.append(c);
2281 }
2282 if (inQuote) {
2283 throw new IllegalArgumentException("Unfinished quote in pattern");
2284 }
2285 return result.toString();
2286 }
2287
2288 /**
2289 * Returns a pattern string describing this date format.
2290 *
2291 * @return a pattern string describing this date format.
2292 */
2293 public String toPattern() {
2294 return pattern;
2295 }
2296
2297 /**
2298 * Returns a localized pattern string describing this date format.
2299 *
2300 * @return a localized pattern string describing this date format.
2301 */
2302 public String toLocalizedPattern() {
2303 return translatePattern(pattern,
2304 DateFormatSymbols.patternChars,
2305 formatData.getLocalPatternChars());
2306 }
2307
2308 /**
2309 * Applies the given pattern string to this date format.
2310 *
2311 * @param pattern the new date and time pattern for this date format
2312 * @exception NullPointerException if the given pattern is null
2313 * @exception IllegalArgumentException if the given pattern is invalid
2314 */
2315 public void applyPattern(String pattern)
2316 {
2317 applyPatternImpl(pattern);
2318 }
2319
2320 private void applyPatternImpl(String pattern) {
2321 compiledPattern = compile(pattern);
2322 this.pattern = pattern;
2323 }
2324
2325 /**
2326 * Applies the given localized pattern string to this date format.
2327 *
2328 * @param pattern a String to be mapped to the new date and time format
2329 * pattern for this format
2330 * @exception NullPointerException if the given pattern is null
2331 * @exception IllegalArgumentException if the given pattern is invalid
2332 */
2333 public void applyLocalizedPattern(String pattern) {
2334 String p = translatePattern(pattern,
2335 formatData.getLocalPatternChars(),
2336 DateFormatSymbols.patternChars);
2337 compiledPattern = compile(p);
2338 this.pattern = p;
2339 }
2340
2341 /**
2342 * Gets a copy of the date and time format symbols of this date format.
2343 *
2344 * @return the date and time format symbols of this date format
2345 * @see #setDateFormatSymbols
2346 */
2347 public DateFormatSymbols getDateFormatSymbols()
2348 {
2349 return (DateFormatSymbols)formatData.clone();
2350 }
2351
2352 /**
2353 * Sets the date and time format symbols of this date format.
2354 *
2355 * @param newFormatSymbols the new date and time format symbols
2356 * @exception NullPointerException if the given newFormatSymbols is null
2357 * @see #getDateFormatSymbols
2358 */
2359 public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols)
2360 {
2361 this.formatData = (DateFormatSymbols)newFormatSymbols.clone();
2362 useDateFormatSymbols = true;
2363 }
2364
2365 /**
2366 * Creates a copy of this <code>SimpleDateFormat</code>. This also
2367 * clones the format's date format symbols.
2368 *
2369 * @return a clone of this <code>SimpleDateFormat</code>
2370 */
2371 @Override
2372 public Object clone() {
2373 SimpleDateFormat other = (SimpleDateFormat) super.clone();
2374 other.formatData = (DateFormatSymbols) formatData.clone();
2375 return other;
2376 }
2377
2378 /**
2379 * Returns the hash code value for this <code>SimpleDateFormat</code> object.
2380 *
2381 * @return the hash code value for this <code>SimpleDateFormat</code> object.
2382 */
2383 @Override
2384 public int hashCode()
2385 {
2386 return pattern.hashCode();
2387 // just enough fields for a reasonable distribution
2388 }
2389
2390 /**
2391 * Compares the given object with this <code>SimpleDateFormat</code> for
2392 * equality.
2393 *
2394 * @return true if the given object is equal to this
2395 * <code>SimpleDateFormat</code>
2396 */
2397 @Override
2398 public boolean equals(Object obj)
2399 {
2400 if (!super.equals(obj)) {
2401 return false; // super does class check
2402 }
2403 SimpleDateFormat that = (SimpleDateFormat) obj;
2404 return (pattern.equals(that.pattern)
2405 && formatData.equals(that.formatData));
2406 }
2407
2408 private static final int[] REST_OF_STYLES = {
2409 Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT, Calendar.LONG_STANDALONE,
2410 };
2411 private Map<String, Integer> getDisplayNamesMap(int field, Locale locale) {
2412 Map<String, Integer> map = calendar.getDisplayNames(field, Calendar.SHORT_FORMAT, locale);
2413 // Get all SHORT and LONG styles (avoid NARROW styles).
2414 for (int style : REST_OF_STYLES) {
2415 Map<String, Integer> m = calendar.getDisplayNames(field, style, locale);
2416 if (m != null) {
2417 map.putAll(m);
2418 }
2419 }
2420 return map;
2421 }
2422
2423 /**
2424 * After reading an object from the input stream, the format
2425 * pattern in the object is verified.
2426 *
2427 * @exception InvalidObjectException if the pattern is invalid
2428 */
2429 private void readObject(ObjectInputStream stream)
2430 throws IOException, ClassNotFoundException {
2431 stream.defaultReadObject();
2432
2433 try {
2434 compiledPattern = compile(pattern);
2435 } catch (Exception e) {
2436 throw new InvalidObjectException("invalid pattern");
2437 }
2438
2439 if (serialVersionOnStream < 1) {
2440 // didn't have defaultCenturyStart field
2441 initializeDefaultCentury();
2442 }
2443 else {
2444 // fill in dependent transient field
2445 parseAmbiguousDatesAsAfter(defaultCenturyStart);
2446 }
2447 serialVersionOnStream = currentSerialVersion;
2448
2449 // If the deserialized object has a SimpleTimeZone, try
2450 // to replace it with a ZoneInfo equivalent in order to
2451 // be compatible with the SimpleTimeZone-based
2452 // implementation as much as possible.
2453 TimeZone tz = getTimeZone();
2454 if (tz instanceof SimpleTimeZone) {
2455 String id = tz.getID();
2456 TimeZone zi = TimeZone.getTimeZone(id);
2457 if (zi != null && zi.hasSameRules(tz) && zi.getID().equals(id)) {
2458 setTimeZone(zi);
2459 }
2460 }
2461 }
2462
2463 /**
2464 * Analyze the negative subpattern of DecimalFormat and set/update values
2465 * as necessary.
2466 */
2467 private void checkNegativeNumberExpression() {
2468 if ((numberFormat instanceof DecimalFormat) &&
2469 !numberFormat.equals(originalNumberFormat)) {
2470 String numberPattern = ((DecimalFormat)numberFormat).toPattern();
2471 if (!numberPattern.equals(originalNumberPattern)) {
2472 hasFollowingMinusSign = false;
2473
2474 int separatorIndex = numberPattern.indexOf(';');
2475 // If the negative subpattern is not absent, we have to analayze
2476 // it in order to check if it has a following minus sign.
2477 if (separatorIndex > -1) {
2478 int minusIndex = numberPattern.indexOf('-', separatorIndex);
2479 if ((minusIndex > numberPattern.lastIndexOf('0')) &&
2480 (minusIndex > numberPattern.lastIndexOf('#'))) {
2481 hasFollowingMinusSign = true;
2482 minusSign = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getMinusSign();
2483 }
2484 }
2485 originalNumberPattern = numberPattern;
2486 }
2487 originalNumberFormat = numberFormat;
2488 }
2489 }
2490
2491 }