1 /*
2 * Copyright 1996-2006 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 /*
27 * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
28 * (C) Copyright IBM Corp. 1996 - 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.ObjectOutputStream;
43 import java.io.Serializable;
44 import java.lang.ref.SoftReference;
45 import java.text.spi.DateFormatSymbolsProvider;
46 import java.util.Arrays;
47 import java.util.Hashtable;
48 import java.util.List;
49 import java.util.Locale;
50 import java.util.ResourceBundle;
51 import java.util.TimeZone;
52 import java.util.spi.LocaleServiceProvider;
53 import sun.util.LocaleServiceProviderPool;
54 import sun.util.TimeZoneNameUtility;
55 import sun.util.calendar.ZoneInfo;
56 import sun.util.resources.LocaleData;
57
58 /**
59 * <code>DateFormatSymbols</code> is a public class for encapsulating
60 * localizable date-time formatting data, such as the names of the
61 * months, the names of the days of the week, and the time zone data.
62 * <code>DateFormat</code> and <code>SimpleDateFormat</code> both use
63 * <code>DateFormatSymbols</code> to encapsulate this information.
64 *
65 * <p>
66 * Typically you shouldn't use <code>DateFormatSymbols</code> directly.
67 * Rather, you are encouraged to create a date-time formatter with the
68 * <code>DateFormat</code> class's factory methods: <code>getTimeInstance</code>,
69 * <code>getDateInstance</code>, or <code>getDateTimeInstance</code>.
70 * These methods automatically create a <code>DateFormatSymbols</code> for
71 * the formatter so that you don't have to. After the
72 * formatter is created, you may modify its format pattern using the
73 * <code>setPattern</code> method. For more information about
74 * creating formatters using <code>DateFormat</code>'s factory methods,
75 * see {@link DateFormat}.
76 *
77 * <p>
78 * If you decide to create a date-time formatter with a specific
79 * format pattern for a specific locale, you can do so with:
80 * <blockquote>
81 * <pre>
82 * new SimpleDateFormat(aPattern, DateFormatSymbols.getInstance(aLocale)).
83 * </pre>
84 * </blockquote>
85 *
86 * <p>
87 * <code>DateFormatSymbols</code> objects are cloneable. When you obtain
88 * a <code>DateFormatSymbols</code> object, feel free to modify the
89 * date-time formatting data. For instance, you can replace the localized
90 * date-time format pattern characters with the ones that you feel easy
91 * to remember. Or you can change the representative cities
92 * to your favorite ones.
93 *
94 * <p>
95 * New <code>DateFormatSymbols</code> subclasses may be added to support
96 * <code>SimpleDateFormat</code> for date-time formatting for additional locales.
97
98 * @see DateFormat
99 * @see SimpleDateFormat
100 * @see java.util.SimpleTimeZone
101 * @author Chen-Lieh Huang
102 */
103 public class DateFormatSymbols implements Serializable, Cloneable {
104
105 /**
106 * Construct a DateFormatSymbols object by loading format data from
107 * resources for the default locale. This constructor can only
108 * construct instances for the locales supported by the Java
109 * runtime environment, not for those supported by installed
110 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
111 * implementations. For full locale coverage, use the
112 * {@link #getInstance(Locale) getInstance} method.
113 *
114 * @see #getInstance()
115 * @exception java.util.MissingResourceException
116 * if the resources for the default locale cannot be
117 * found or cannot be loaded.
118 */
119 public DateFormatSymbols()
120 {
121 initializeData(Locale.getDefault());
122 }
123
124 /**
125 * Construct a DateFormatSymbols object by loading format data from
126 * resources for the given locale. This constructor can only
127 * construct instances for the locales supported by the Java
128 * runtime environment, not for those supported by installed
129 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
130 * implementations. For full locale coverage, use the
131 * {@link #getInstance(Locale) getInstance} method.
132 *
133 * @see #getInstance(Locale)
134 * @exception java.util.MissingResourceException
135 * if the resources for the specified locale cannot be
136 * found or cannot be loaded.
137 */
138 public DateFormatSymbols(Locale locale)
139 {
140 initializeData(locale);
141 }
142
143 /**
144 * Era strings. For example: "AD" and "BC". An array of 2 strings,
145 * indexed by <code>Calendar.BC</code> and <code>Calendar.AD</code>.
146 * @serial
147 */
148 String eras[] = null;
149
150 /**
151 * Month strings. For example: "January", "February", etc. An array
152 * of 13 strings (some calendars have 13 months), indexed by
153 * <code>Calendar.JANUARY</code>, <code>Calendar.FEBRUARY</code>, etc.
154 * @serial
155 */
156 String months[] = null;
157
158 /**
159 * Short month strings. For example: "Jan", "Feb", etc. An array of
160 * 13 strings (some calendars have 13 months), indexed by
161 * <code>Calendar.JANUARY</code>, <code>Calendar.FEBRUARY</code>, etc.
162
163 * @serial
164 */
165 String shortMonths[] = null;
166
167 /**
168 * Weekday strings. For example: "Sunday", "Monday", etc. An array
169 * of 8 strings, indexed by <code>Calendar.SUNDAY</code>,
170 * <code>Calendar.MONDAY</code>, etc.
171 * The element <code>weekdays[0]</code> is ignored.
172 * @serial
173 */
174 String weekdays[] = null;
175
176 /**
177 * Short weekday strings. For example: "Sun", "Mon", etc. An array
178 * of 8 strings, indexed by <code>Calendar.SUNDAY</code>,
179 * <code>Calendar.MONDAY</code>, etc.
180 * The element <code>shortWeekdays[0]</code> is ignored.
181 * @serial
182 */
183 String shortWeekdays[] = null;
184
185 /**
186 * AM and PM strings. For example: "AM" and "PM". An array of
187 * 2 strings, indexed by <code>Calendar.AM</code> and
188 * <code>Calendar.PM</code>.
189 * @serial
190 */
191 String ampms[] = null;
192
193 /**
194 * Localized names of time zones in this locale. This is a
195 * two-dimensional array of strings of size <em>n</em> by <em>m</em>,
196 * where <em>m</em> is at least 5. Each of the <em>n</em> rows is an
197 * entry containing the localized names for a single <code>TimeZone</code>.
198 * Each such row contains (with <code>i</code> ranging from
199 * 0..<em>n</em>-1):
200 * <ul>
201 * <li><code>zoneStrings[i][0]</code> - time zone ID</li>
202 * <li><code>zoneStrings[i][1]</code> - long name of zone in standard
203 * time</li>
204 * <li><code>zoneStrings[i][2]</code> - short name of zone in
205 * standard time</li>
206 * <li><code>zoneStrings[i][3]</code> - long name of zone in daylight
207 * saving time</li>
208 * <li><code>zoneStrings[i][4]</code> - short name of zone in daylight
209 * saving time</li>
210 * </ul>
211 * The zone ID is <em>not</em> localized; it's one of the valid IDs of
212 * the {@link java.util.TimeZone TimeZone} class that are not
213 * <a href="../java/util/TimeZone.html#CustomID">custom IDs</a>.
214 * All other entries are localized names.
215 * @see java.util.TimeZone
216 * @serial
217 */
218 String zoneStrings[][] = null;
219
220 /**
221 * Indicates that zoneStrings is set externally with setZoneStrings() method.
222 */
223 transient boolean isZoneStringsSet = false;
224
225 /**
226 * Unlocalized date-time pattern characters. For example: 'y', 'd', etc.
227 * All locales use the same these unlocalized pattern characters.
228 */
229 static final String patternChars = "GyMdkHmsSEDFwWahKzZ";
230
231 /**
232 * Localized date-time pattern characters. For example, a locale may
233 * wish to use 'u' rather than 'y' to represent years in its date format
234 * pattern strings.
235 * This string must be exactly 18 characters long, with the index of
236 * the characters described by <code>DateFormat.ERA_FIELD</code>,
237 * <code>DateFormat.YEAR_FIELD</code>, etc. Thus, if the string were
238 * "Xz...", then localized patterns would use 'X' for era and 'z' for year.
239 * @serial
240 */
241 String localPatternChars = null;
242
243 /**
244 * The locale which is used for initializing this DateFormatSymbols object.
245 *
246 * @since 1.6
247 * @serial
248 */
249 Locale locale = null;
250
251 /* use serialVersionUID from JDK 1.1.4 for interoperability */
252 static final long serialVersionUID = -5987973545549424702L;
253
254 /**
255 * Returns an array of all locales for which the
256 * <code>getInstance</code> methods of this class can return
257 * localized instances.
258 * The returned array represents the union of locales supported by the
259 * Java runtime and by installed
260 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
261 * implementations. It must contain at least a <code>Locale</code>
262 * instance equal to {@link java.util.Locale#US Locale.US}.
263 *
264 * @return An array of locales for which localized
265 * <code>DateFormatSymbols</code> instances are available.
266 * @since 1.6
267 */
268 public static Locale[] getAvailableLocales() {
269 LocaleServiceProviderPool pool=
270 LocaleServiceProviderPool.getPool(DateFormatSymbolsProvider.class);
271 return pool.getAvailableLocales();
272 }
273
274 /**
275 * Gets the <code>DateFormatSymbols</code> instance for the default
276 * locale. This method provides access to <code>DateFormatSymbols</code>
277 * instances for locales supported by the Java runtime itself as well
278 * as for those supported by installed
279 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
280 * implementations.
281 * @return a <code>DateFormatSymbols</code> instance.
282 * @since 1.6
283 */
284 public static final DateFormatSymbols getInstance() {
285 return getInstance(Locale.getDefault());
286 }
287
288 /**
289 * Gets the <code>DateFormatSymbols</code> instance for the specified
290 * locale. This method provides access to <code>DateFormatSymbols</code>
291 * instances for locales supported by the Java runtime itself as well
292 * as for those supported by installed
293 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
294 * implementations.
295 * @param locale the given locale.
296 * @return a <code>DateFormatSymbols</code> instance.
297 * @exception NullPointerException if <code>locale</code> is null
298 * @since 1.6
299 */
300 public static final DateFormatSymbols getInstance(Locale locale) {
301
302 // Check whether a provider can provide an implementation that's closer
303 // to the requested locale than what the Java runtime itself can provide.
304 LocaleServiceProviderPool pool =
305 LocaleServiceProviderPool.getPool(DateFormatSymbolsProvider.class);
306 if (pool.hasProviders()) {
307 DateFormatSymbols providersInstance = pool.getLocalizedObject(
308 DateFormatSymbolsGetter.INSTANCE, locale);
309 if (providersInstance != null) {
310 return providersInstance;
311 }
312 }
313
314 return new DateFormatSymbols(locale);
315 }
316
317 /**
318 * Gets era strings. For example: "AD" and "BC".
319 * @return the era strings.
320 */
321 public String[] getEras() {
322 return Arrays.copyOf(eras, eras.length);
323 }
324
325 /**
326 * Sets era strings. For example: "AD" and "BC".
327 * @param newEras the new era strings.
328 */
329 public void setEras(String[] newEras) {
330 eras = Arrays.copyOf(newEras, newEras.length);
331 }
332
333 /**
334 * Gets month strings. For example: "January", "February", etc.
335 * @return the month strings.
336 */
337 public String[] getMonths() {
338 return Arrays.copyOf(months, months.length);
339 }
340
341 /**
342 * Sets month strings. For example: "January", "February", etc.
343 * @param newMonths the new month strings.
344 */
345 public void setMonths(String[] newMonths) {
346 months = Arrays.copyOf(newMonths, newMonths.length);
347 }
348
349 /**
350 * Gets short month strings. For example: "Jan", "Feb", etc.
351 * @return the short month strings.
352 */
353 public String[] getShortMonths() {
354 return Arrays.copyOf(shortMonths, shortMonths.length);
355 }
356
357 /**
358 * Sets short month strings. For example: "Jan", "Feb", etc.
359 * @param newShortMonths the new short month strings.
360 */
361 public void setShortMonths(String[] newShortMonths) {
362 shortMonths = Arrays.copyOf(newShortMonths, newShortMonths.length);
363 }
364
365 /**
366 * Gets weekday strings. For example: "Sunday", "Monday", etc.
367 * @return the weekday strings. Use <code>Calendar.SUNDAY</code>,
368 * <code>Calendar.MONDAY</code>, etc. to index the result array.
369 */
370 public String[] getWeekdays() {
371 return Arrays.copyOf(weekdays, weekdays.length);
372 }
373
374 /**
375 * Sets weekday strings. For example: "Sunday", "Monday", etc.
376 * @param newWeekdays the new weekday strings. The array should
377 * be indexed by <code>Calendar.SUNDAY</code>,
378 * <code>Calendar.MONDAY</code>, etc.
379 */
380 public void setWeekdays(String[] newWeekdays) {
381 weekdays = Arrays.copyOf(newWeekdays, newWeekdays.length);
382 }
383
384 /**
385 * Gets short weekday strings. For example: "Sun", "Mon", etc.
386 * @return the short weekday strings. Use <code>Calendar.SUNDAY</code>,
387 * <code>Calendar.MONDAY</code>, etc. to index the result array.
388 */
389 public String[] getShortWeekdays() {
390 return Arrays.copyOf(shortWeekdays, shortWeekdays.length);
391 }
392
393 /**
394 * Sets short weekday strings. For example: "Sun", "Mon", etc.
395 * @param newShortWeekdays the new short weekday strings. The array should
396 * be indexed by <code>Calendar.SUNDAY</code>,
397 * <code>Calendar.MONDAY</code>, etc.
398 */
399 public void setShortWeekdays(String[] newShortWeekdays) {
400 shortWeekdays = Arrays.copyOf(newShortWeekdays, newShortWeekdays.length);
401 }
402
403 /**
404 * Gets ampm strings. For example: "AM" and "PM".
405 * @return the ampm strings.
406 */
407 public String[] getAmPmStrings() {
408 return Arrays.copyOf(ampms, ampms.length);
409 }
410
411 /**
412 * Sets ampm strings. For example: "AM" and "PM".
413 * @param newAmpms the new ampm strings.
414 */
415 public void setAmPmStrings(String[] newAmpms) {
416 ampms = Arrays.copyOf(newAmpms, newAmpms.length);
417 }
418
419 /**
420 * Gets time zone strings. Use of this method is discouraged; use
421 * {@link java.util.TimeZone#getDisplayName() TimeZone.getDisplayName()}
422 * instead.
423 * <p>
424 * The value returned is a
425 * two-dimensional array of strings of size <em>n</em> by <em>m</em>,
426 * where <em>m</em> is at least 5. Each of the <em>n</em> rows is an
427 * entry containing the localized names for a single <code>TimeZone</code>.
428 * Each such row contains (with <code>i</code> ranging from
429 * 0..<em>n</em>-1):
430 * <ul>
431 * <li><code>zoneStrings[i][0]</code> - time zone ID</li>
432 * <li><code>zoneStrings[i][1]</code> - long name of zone in standard
433 * time</li>
434 * <li><code>zoneStrings[i][2]</code> - short name of zone in
435 * standard time</li>
436 * <li><code>zoneStrings[i][3]</code> - long name of zone in daylight
437 * saving time</li>
438 * <li><code>zoneStrings[i][4]</code> - short name of zone in daylight
439 * saving time</li>
440 * </ul>
441 * The zone ID is <em>not</em> localized; it's one of the valid IDs of
442 * the {@link java.util.TimeZone TimeZone} class that are not
443 * <a href="../util/TimeZone.html#CustomID">custom IDs</a>.
444 * All other entries are localized names. If a zone does not implement
445 * daylight saving time, the daylight saving time names should not be used.
446 * <p>
447 * If {@link #setZoneStrings(String[][]) setZoneStrings} has been called
448 * on this <code>DateFormatSymbols</code> instance, then the strings
449 * provided by that call are returned. Otherwise, the returned array
450 * contains names provided by the Java runtime and by installed
451 * {@link java.util.spi.TimeZoneNameProvider TimeZoneNameProvider}
452 * implementations.
453 *
454 * @return the time zone strings.
455 * @see #setZoneStrings(String[][])
456 */
457 public String[][] getZoneStrings() {
458 return getZoneStringsImpl(true);
459 }
460
461 /**
462 * Sets time zone strings. The argument must be a
463 * two-dimensional array of strings of size <em>n</em> by <em>m</em>,
464 * where <em>m</em> is at least 5. Each of the <em>n</em> rows is an
465 * entry containing the localized names for a single <code>TimeZone</code>.
466 * Each such row contains (with <code>i</code> ranging from
467 * 0..<em>n</em>-1):
468 * <ul>
469 * <li><code>zoneStrings[i][0]</code> - time zone ID</li>
470 * <li><code>zoneStrings[i][1]</code> - long name of zone in standard
471 * time</li>
472 * <li><code>zoneStrings[i][2]</code> - short name of zone in
473 * standard time</li>
474 * <li><code>zoneStrings[i][3]</code> - long name of zone in daylight
475 * saving time</li>
476 * <li><code>zoneStrings[i][4]</code> - short name of zone in daylight
477 * saving time</li>
478 * </ul>
479 * The zone ID is <em>not</em> localized; it's one of the valid IDs of
480 * the {@link java.util.TimeZone TimeZone} class that are not
481 * <a href="../util/TimeZone.html#CustomID">custom IDs</a>.
482 * All other entries are localized names.
483 *
484 * @param newZoneStrings the new time zone strings.
485 * @exception IllegalArgumentException if the length of any row in
486 * <code>newZoneStrings</code> is less than 5
487 * @exception NullPointerException if <code>newZoneStrings</code> is null
488 * @see #getZoneStrings()
489 */
490 public void setZoneStrings(String[][] newZoneStrings) {
491 String[][] aCopy = new String[newZoneStrings.length][];
492 for (int i = 0; i < newZoneStrings.length; ++i) {
493 int len = newZoneStrings[i].length;
494 if (len < 5) {
495 throw new IllegalArgumentException();
496 }
497 aCopy[i] = Arrays.copyOf(newZoneStrings[i], len);
498 }
499 zoneStrings = aCopy;
500 isZoneStringsSet = true;
501 }
502
503 /**
504 * Gets localized date-time pattern characters. For example: 'u', 't', etc.
505 * @return the localized date-time pattern characters.
506 */
507 public String getLocalPatternChars() {
508 return new String(localPatternChars);
509 }
510
511 /**
512 * Sets localized date-time pattern characters. For example: 'u', 't', etc.
513 * @param newLocalPatternChars the new localized date-time
514 * pattern characters.
515 */
516 public void setLocalPatternChars(String newLocalPatternChars) {
517 localPatternChars = new String(newLocalPatternChars);
518 }
519
520 /**
521 * Overrides Cloneable
522 */
523 public Object clone()
524 {
525 try
526 {
527 DateFormatSymbols other = (DateFormatSymbols)super.clone();
528 copyMembers(this, other);
529 return other;
530 } catch (CloneNotSupportedException e) {
531 throw new InternalError();
532 }
533 }
534
535 /**
536 * Override hashCode.
537 * Generates a hash code for the DateFormatSymbols object.
538 */
539 public int hashCode() {
540 int hashcode = 0;
541 String[][] zoneStrings = getZoneStringsWrapper();
542 for (int index = 0; index < zoneStrings[0].length; ++index)
543 hashcode ^= zoneStrings[0][index].hashCode();
544 return hashcode;
545 }
546
547 /**
548 * Override equals
549 */
550 public boolean equals(Object obj)
551 {
552 if (this == obj) return true;
553 if (obj == null || getClass() != obj.getClass()) return false;
554 DateFormatSymbols that = (DateFormatSymbols) obj;
555 return (Arrays.equals(eras, that.eras)
556 && Arrays.equals(months, that.months)
557 && Arrays.equals(shortMonths, that.shortMonths)
558 && Arrays.equals(weekdays, that.weekdays)
559 && Arrays.equals(shortWeekdays, that.shortWeekdays)
560 && Arrays.equals(ampms, that.ampms)
561 && Arrays.deepEquals(getZoneStringsWrapper(), that.getZoneStringsWrapper())
562 && ((localPatternChars != null
563 && localPatternChars.equals(that.localPatternChars))
564 || (localPatternChars == null
565 && that.localPatternChars == null)));
566 }
567
568 // =======================privates===============================
569
570 /**
571 * Useful constant for defining time zone offsets.
572 */
573 static final int millisPerHour = 60*60*1000;
574
575 /**
576 * Cache to hold the FormatData and TimeZoneNames ResourceBundles
577 * of a Locale.
578 */
579 private static Hashtable cachedLocaleData = new Hashtable(3);
580
581 /**
582 * Look up resource data for the desiredLocale in the cache; update the
583 * cache if necessary.
584 */
585 private static ResourceBundle cacheLookup(Locale desiredLocale) {
586 ResourceBundle rb;
587 SoftReference data
588 = (SoftReference)cachedLocaleData.get(desiredLocale);
589 if (data == null) {
590 rb = LocaleData.getDateFormatData(desiredLocale);
591 data = new SoftReference(rb);
592 cachedLocaleData.put(desiredLocale, data);
593 } else {
594 if ((rb = (ResourceBundle)data.get()) == null) {
595 rb = LocaleData.getDateFormatData(desiredLocale);
596 data = new SoftReference(rb);
597 }
598 }
599 return rb;
600 }
601
602 private void initializeData(Locale desiredLocale) {
603 int i;
604 ResourceBundle resource = cacheLookup(desiredLocale);
605
606 // FIXME: cache only ResourceBundle. Hence every time, will do
607 // getObject(). This won't be necessary if the Resource itself
608 // is cached.
609 eras = (String[])resource.getObject("Eras");
610 months = resource.getStringArray("MonthNames");
611 shortMonths = resource.getStringArray("MonthAbbreviations");
612 String[] lWeekdays = resource.getStringArray("DayNames");
613 weekdays = new String[8];
614 weekdays[0] = ""; // 1-based
615 for (i=0; i<lWeekdays.length; i++)
616 weekdays[i+1] = lWeekdays[i];
617 String[] sWeekdays = resource.getStringArray("DayAbbreviations");
618 shortWeekdays = new String[8];
619 shortWeekdays[0] = ""; // 1-based
620 for (i=0; i<sWeekdays.length; i++)
621 shortWeekdays[i+1] = sWeekdays[i];
622 ampms = resource.getStringArray("AmPmMarkers");
623 localPatternChars = resource.getString("DateTimePatternChars");
624
625 locale = desiredLocale;
626 }
627
628 /**
629 * Package private: used by SimpleDateFormat
630 * Gets the index for the given time zone ID to obtain the time zone
631 * strings for formatting. The time zone ID is just for programmatic
632 * lookup. NOT LOCALIZED!!!
633 * @param ID the given time zone ID.
634 * @return the index of the given time zone ID. Returns -1 if
635 * the given time zone ID can't be located in the DateFormatSymbols object.
636 * @see java.util.SimpleTimeZone
637 */
638 final int getZoneIndex(String ID)
639 {
640 String[][] zoneStrings = getZoneStringsWrapper();
641 for (int index=0; index<zoneStrings.length; index++)
642 {
643 if (ID.equals(zoneStrings[index][0])) return index;
644 }
645
646 return -1;
647 }
648
649 /**
650 * Wrapper method to the getZoneStrings(), which is called from inside
651 * the java.text package and not to mutate the returned arrays, so that
652 * it does not need to create a defensive copy.
653 */
654 final String[][] getZoneStringsWrapper() {
655 if (isSubclassObject()) {
656 return getZoneStrings();
657 } else {
658 return getZoneStringsImpl(false);
659 }
660 }
661
662 private final String[][] getZoneStringsImpl(boolean needsCopy) {
663 if (zoneStrings == null) {
664 zoneStrings = TimeZoneNameUtility.getZoneStrings(locale);
665 }
666
667 if (!needsCopy) {
668 return zoneStrings;
669 }
670
671 int len = zoneStrings.length;
672 String[][] aCopy = new String[len][];
673 for (int i = 0; i < len; i++) {
674 aCopy[i] = Arrays.copyOf(zoneStrings[i], zoneStrings[i].length);
675 }
676 return aCopy;
677 }
678
679 private final boolean isSubclassObject() {
680 return !getClass().getName().equals("java.text.DateFormatSymbols");
681 }
682
683 /**
684 * Clones all the data members from the source DateFormatSymbols to
685 * the target DateFormatSymbols. This is only for subclasses.
686 * @param src the source DateFormatSymbols.
687 * @param dst the target DateFormatSymbols.
688 */
689 private final void copyMembers(DateFormatSymbols src, DateFormatSymbols dst)
690 {
691 dst.eras = Arrays.copyOf(src.eras, src.eras.length);
692 dst.months = Arrays.copyOf(src.months, src.months.length);
693 dst.shortMonths = Arrays.copyOf(src.shortMonths, src.shortMonths.length);
694 dst.weekdays = Arrays.copyOf(src.weekdays, src.weekdays.length);
695 dst.shortWeekdays = Arrays.copyOf(src.shortWeekdays, src.shortWeekdays.length);
696 dst.ampms = Arrays.copyOf(src.ampms, src.ampms.length);
697 if (src.zoneStrings != null) {
698 dst.zoneStrings = src.getZoneStringsImpl(true);
699 } else {
700 dst.zoneStrings = null;
701 }
702 dst.localPatternChars = new String (src.localPatternChars);
703 }
704
705 /**
706 * Write out the default serializable data, after ensuring the
707 * <code>zoneStrings</code> field is initialized in order to make
708 * sure the backward compatibility.
709 *
710 * @since 1.6
711 */
712 private void writeObject(ObjectOutputStream stream) throws IOException {
713 if (zoneStrings == null) {
714 zoneStrings = TimeZoneNameUtility.getZoneStrings(locale);
715 }
716 stream.defaultWriteObject();
717 }
718
719 /**
720 * Obtains a DateFormatSymbols instance from a DateFormatSymbolsProvider
721 * implementation.
722 */
723 private static class DateFormatSymbolsGetter
724 implements LocaleServiceProviderPool.LocalizedObjectGetter<DateFormatSymbolsProvider,
725 DateFormatSymbols> {
726 private static final DateFormatSymbolsGetter INSTANCE =
727 new DateFormatSymbolsGetter();
728
729 public DateFormatSymbols getObject(DateFormatSymbolsProvider dateFormatSymbolsProvider,
730 Locale locale,
731 String key,
732 Object... params) {
733 assert params.length == 0;
734 return dateFormatSymbolsProvider.getInstance(locale);
735 }
736 }
737 }
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