1 /* 2 * Copyright (c) 1996, 2016, 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 - 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.Locale; 48 import java.util.Objects; 49 import java.util.ResourceBundle; 50 import java.util.concurrent.ConcurrentHashMap; 51 import java.util.concurrent.ConcurrentMap; 52 import sun.util.locale.provider.LocaleProviderAdapter; 53 import sun.util.locale.provider.LocaleServiceProviderPool; 54 import sun.util.locale.provider.ResourceBundleBasedAdapter; 55 import sun.util.locale.provider.TimeZoneNameUtility; 56 57 /** 58 * <code>DateFormatSymbols</code> is a public class for encapsulating 59 * localizable date-time formatting data, such as the names of the 60 * months, the names of the days of the week, and the time zone data. 61 * <code>SimpleDateFormat</code> uses 62 * <code>DateFormatSymbols</code> to encapsulate this information. 63 * 64 * <p> 65 * Typically you shouldn't use <code>DateFormatSymbols</code> directly. 66 * Rather, you are encouraged to create a date-time formatter with the 67 * <code>DateFormat</code> class's factory methods: <code>getTimeInstance</code>, 68 * <code>getDateInstance</code>, or <code>getDateTimeInstance</code>. 69 * These methods automatically create a <code>DateFormatSymbols</code> for 70 * the formatter so that you don't have to. After the 71 * formatter is created, you may modify its format pattern using the 72 * <code>setPattern</code> method. For more information about 73 * creating formatters using <code>DateFormat</code>'s factory methods, 74 * see {@link DateFormat}. 75 * 76 * <p> 77 * If you decide to create a date-time formatter with a specific 78 * format pattern for a specific locale, you can do so with: 79 * <blockquote> 80 * <pre> 81 * new SimpleDateFormat(aPattern, DateFormatSymbols.getInstance(aLocale)). 82 * </pre> 83 * </blockquote> 84 * 85 * <p> 86 * <code>DateFormatSymbols</code> objects are cloneable. When you obtain 87 * a <code>DateFormatSymbols</code> object, feel free to modify the 88 * date-time formatting data. For instance, you can replace the localized 89 * date-time format pattern characters with the ones that you feel easy 90 * to remember. Or you can change the representative cities 91 * to your favorite ones. 92 * 93 * <p> 94 * New <code>DateFormatSymbols</code> subclasses may be added to support 95 * <code>SimpleDateFormat</code> for date-time formatting for additional locales. 96 97 * @see DateFormat 98 * @see SimpleDateFormat 99 * @see java.util.SimpleTimeZone 100 * @author Chen-Lieh Huang 101 */ 102 public class DateFormatSymbols implements Serializable, Cloneable { 103 104 /** 105 * Construct a DateFormatSymbols object by loading format data from 106 * resources for the default {@link java.util.Locale.Category#FORMAT FORMAT} 107 * 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 * <p>This is equivalent to calling 114 * {@link #DateFormatSymbols(Locale) 115 * DateFormatSymbols(Locale.getDefault(Locale.Category.FORMAT))}. 116 * @see #getInstance() 117 * @see java.util.Locale#getDefault(java.util.Locale.Category) 118 * @see java.util.Locale.Category#FORMAT 119 * @exception java.util.MissingResourceException 120 * if the resources for the default locale cannot be 121 * found or cannot be loaded. 122 */ DateFormatSymbols()123 public DateFormatSymbols() 124 { 125 initializeData(Locale.getDefault(Locale.Category.FORMAT)); 126 } 127 128 /** 129 * Construct a DateFormatSymbols object by loading format data from 130 * resources for the given locale. This constructor can only 131 * construct instances for the locales supported by the Java 132 * runtime environment, not for those supported by installed 133 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider} 134 * implementations. For full locale coverage, use the 135 * {@link #getInstance(Locale) getInstance} method. 136 * 137 * @param locale the desired locale 138 * @see #getInstance(Locale) 139 * @exception java.util.MissingResourceException 140 * if the resources for the specified locale cannot be 141 * found or cannot be loaded. 142 */ DateFormatSymbols(Locale locale)143 public DateFormatSymbols(Locale locale) 144 { 145 initializeData(locale); 146 } 147 148 /** 149 * Constructs an uninitialized DateFormatSymbols. 150 */ DateFormatSymbols(boolean flag)151 private DateFormatSymbols(boolean flag) { 152 } 153 154 /** 155 * Era strings. For example: "AD" and "BC". An array of 2 strings, 156 * indexed by <code>Calendar.BC</code> and <code>Calendar.AD</code>. 157 * @serial 158 */ 159 String eras[] = null; 160 161 /** 162 * Month strings. For example: "January", "February", etc. An array 163 * of 13 strings (some calendars have 13 months), indexed by 164 * <code>Calendar.JANUARY</code>, <code>Calendar.FEBRUARY</code>, etc. 165 * @serial 166 */ 167 String months[] = null; 168 169 /** 170 * Short month strings. For example: "Jan", "Feb", etc. An array of 171 * 13 strings (some calendars have 13 months), indexed by 172 * <code>Calendar.JANUARY</code>, <code>Calendar.FEBRUARY</code>, etc. 173 174 * @serial 175 */ 176 String shortMonths[] = null; 177 178 /** 179 * Weekday strings. For example: "Sunday", "Monday", etc. An array 180 * of 8 strings, indexed by <code>Calendar.SUNDAY</code>, 181 * <code>Calendar.MONDAY</code>, etc. 182 * The element <code>weekdays[0]</code> is ignored. 183 * @serial 184 */ 185 String weekdays[] = null; 186 187 /** 188 * Short weekday strings. For example: "Sun", "Mon", etc. An array 189 * of 8 strings, indexed by <code>Calendar.SUNDAY</code>, 190 * <code>Calendar.MONDAY</code>, etc. 191 * The element <code>shortWeekdays[0]</code> is ignored. 192 * @serial 193 */ 194 String shortWeekdays[] = null; 195 196 /** 197 * AM and PM strings. For example: "AM" and "PM". An array of 198 * 2 strings, indexed by <code>Calendar.AM</code> and 199 * <code>Calendar.PM</code>. 200 * @serial 201 */ 202 String ampms[] = null; 203 204 /** 205 * Localized names of time zones in this locale. This is a 206 * two-dimensional array of strings of size <em>n</em> by <em>m</em>, 207 * where <em>m</em> is at least 5. Each of the <em>n</em> rows is an 208 * entry containing the localized names for a single <code>TimeZone</code>. 209 * Each such row contains (with <code>i</code> ranging from 210 * 0..<em>n</em>-1): 211 * <ul> 212 * <li><code>zoneStrings[i][0]</code> - time zone ID</li> 213 * <li><code>zoneStrings[i][1]</code> - long name of zone in standard 214 * time</li> 215 * <li><code>zoneStrings[i][2]</code> - short name of zone in 216 * standard time</li> 217 * <li><code>zoneStrings[i][3]</code> - long name of zone in daylight 218 * saving time</li> 219 * <li><code>zoneStrings[i][4]</code> - short name of zone in daylight 220 * saving time</li> 221 * </ul> 222 * The zone ID is <em>not</em> localized; it's one of the valid IDs of 223 * the {@link java.util.TimeZone TimeZone} class that are not 224 * <a href="../java/util/TimeZone.html#CustomID">custom IDs</a>. 225 * All other entries are localized names. 226 * @see java.util.TimeZone 227 * @serial 228 */ 229 String zoneStrings[][] = null; 230 231 /** 232 * Indicates that zoneStrings is set externally with setZoneStrings() method. 233 */ 234 transient boolean isZoneStringsSet = false; 235 236 /** 237 * Unlocalized date-time pattern characters. For example: 'y', 'd', etc. 238 * All locales use the same these unlocalized pattern characters. 239 */ 240 static final String patternChars = "GyMdkHmsSEDFwWahKzZYuXL"; 241 242 static final int PATTERN_ERA = 0; // G 243 static final int PATTERN_YEAR = 1; // y 244 static final int PATTERN_MONTH = 2; // M 245 static final int PATTERN_DAY_OF_MONTH = 3; // d 246 static final int PATTERN_HOUR_OF_DAY1 = 4; // k 247 static final int PATTERN_HOUR_OF_DAY0 = 5; // H 248 static final int PATTERN_MINUTE = 6; // m 249 static final int PATTERN_SECOND = 7; // s 250 static final int PATTERN_MILLISECOND = 8; // S 251 static final int PATTERN_DAY_OF_WEEK = 9; // E 252 static final int PATTERN_DAY_OF_YEAR = 10; // D 253 static final int PATTERN_DAY_OF_WEEK_IN_MONTH = 11; // F 254 static final int PATTERN_WEEK_OF_YEAR = 12; // w 255 static final int PATTERN_WEEK_OF_MONTH = 13; // W 256 static final int PATTERN_AM_PM = 14; // a 257 static final int PATTERN_HOUR1 = 15; // h 258 static final int PATTERN_HOUR0 = 16; // K 259 static final int PATTERN_ZONE_NAME = 17; // z 260 static final int PATTERN_ZONE_VALUE = 18; // Z 261 static final int PATTERN_WEEK_YEAR = 19; // Y 262 static final int PATTERN_ISO_DAY_OF_WEEK = 20; // u 263 static final int PATTERN_ISO_ZONE = 21; // X 264 static final int PATTERN_MONTH_STANDALONE = 22; // L 265 266 /** 267 * Localized date-time pattern characters. For example, a locale may 268 * wish to use 'u' rather than 'y' to represent years in its date format 269 * pattern strings. 270 * This string must be exactly 18 characters long, with the index of 271 * the characters described by <code>DateFormat.ERA_FIELD</code>, 272 * <code>DateFormat.YEAR_FIELD</code>, etc. Thus, if the string were 273 * "Xz...", then localized patterns would use 'X' for era and 'z' for year. 274 * @serial 275 */ 276 String localPatternChars = null; 277 278 /** 279 * The locale which is used for initializing this DateFormatSymbols object. 280 * 281 * @since 1.6 282 * @serial 283 */ 284 Locale locale = null; 285 286 /* use serialVersionUID from JDK 1.1.4 for interoperability */ 287 static final long serialVersionUID = -5987973545549424702L; 288 289 /** 290 * Returns an array of all locales for which the 291 * <code>getInstance</code> methods of this class can return 292 * localized instances. 293 * The returned array represents the union of locales supported by the 294 * Java runtime and by installed 295 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider} 296 * implementations. It must contain at least a <code>Locale</code> 297 * instance equal to {@link java.util.Locale#US Locale.US}. 298 * 299 * @return An array of locales for which localized 300 * <code>DateFormatSymbols</code> instances are available. 301 * @since 1.6 302 */ getAvailableLocales()303 public static Locale[] getAvailableLocales() { 304 LocaleServiceProviderPool pool= 305 LocaleServiceProviderPool.getPool(DateFormatSymbolsProvider.class); 306 return pool.getAvailableLocales(); 307 } 308 309 /** 310 * Gets the <code>DateFormatSymbols</code> instance for the default 311 * locale. This method provides access to <code>DateFormatSymbols</code> 312 * instances for locales supported by the Java runtime itself as well 313 * as for those supported by installed 314 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider} 315 * implementations. 316 * <p>This is equivalent to calling {@link #getInstance(Locale) 317 * getInstance(Locale.getDefault(Locale.Category.FORMAT))}. 318 * @see java.util.Locale#getDefault(java.util.Locale.Category) 319 * @see java.util.Locale.Category#FORMAT 320 * @return a <code>DateFormatSymbols</code> instance. 321 * @since 1.6 322 */ getInstance()323 public static final DateFormatSymbols getInstance() { 324 return getInstance(Locale.getDefault(Locale.Category.FORMAT)); 325 } 326 327 /** 328 * Gets the <code>DateFormatSymbols</code> instance for the specified 329 * locale. This method provides access to <code>DateFormatSymbols</code> 330 * instances for locales supported by the Java runtime itself as well 331 * as for those supported by installed 332 * {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider} 333 * implementations. 334 * @param locale the given locale. 335 * @return a <code>DateFormatSymbols</code> instance. 336 * @exception NullPointerException if <code>locale</code> is null 337 * @since 1.6 338 */ getInstance(Locale locale)339 public static final DateFormatSymbols getInstance(Locale locale) { 340 DateFormatSymbols dfs = getProviderInstance(locale); 341 if (dfs != null) { 342 return dfs; 343 } 344 throw new RuntimeException("DateFormatSymbols instance creation failed."); 345 } 346 347 /** 348 * Returns a DateFormatSymbols provided by a provider or found in 349 * the cache. Note that this method returns a cached instance, 350 * not its clone. Therefore, the instance should never be given to 351 * an application. 352 */ getInstanceRef(Locale locale)353 static final DateFormatSymbols getInstanceRef(Locale locale) { 354 DateFormatSymbols dfs = getProviderInstance(locale); 355 if (dfs != null) { 356 return dfs; 357 } 358 throw new RuntimeException("DateFormatSymbols instance creation failed."); 359 } 360 getProviderInstance(Locale locale)361 private static DateFormatSymbols getProviderInstance(Locale locale) { 362 LocaleProviderAdapter adapter = LocaleProviderAdapter.getAdapter(DateFormatSymbolsProvider.class, locale); 363 DateFormatSymbolsProvider provider = adapter.getDateFormatSymbolsProvider(); 364 DateFormatSymbols dfsyms = provider.getInstance(locale); 365 if (dfsyms == null) { 366 provider = LocaleProviderAdapter.forJRE().getDateFormatSymbolsProvider(); 367 dfsyms = provider.getInstance(locale); 368 } 369 return dfsyms; 370 } 371 372 /** 373 * Gets era strings. For example: "AD" and "BC". 374 * @return the era strings. 375 */ getEras()376 public String[] getEras() { 377 return Arrays.copyOf(eras, eras.length); 378 } 379 380 /** 381 * Sets era strings. For example: "AD" and "BC". 382 * @param newEras the new era strings. 383 */ setEras(String[] newEras)384 public void setEras(String[] newEras) { 385 eras = Arrays.copyOf(newEras, newEras.length); 386 cachedHashCode = 0; 387 } 388 389 /** 390 * Gets month strings. For example: "January", "February", etc. 391 * 392 * <p>If the language requires different forms for formatting and 393 * stand-alone usages, this method returns month names in the 394 * formatting form. For example, the preferred month name for 395 * January in the Czech language is <em>ledna</em> in the 396 * formatting form, while it is <em>leden</em> in the stand-alone 397 * form. This method returns {@code "ledna"} in this case. Refer 398 * to the <a href="http://unicode.org/reports/tr35/#Calendar_Elements"> 399 * Calendar Elements in the Unicode Locale Data Markup Language 400 * (LDML) specification</a> for more details. 401 * 402 * @return the month strings. 403 */ getMonths()404 public String[] getMonths() { 405 return Arrays.copyOf(months, months.length); 406 } 407 408 /** 409 * Sets month strings. For example: "January", "February", etc. 410 * @param newMonths the new month strings. 411 */ setMonths(String[] newMonths)412 public void setMonths(String[] newMonths) { 413 months = Arrays.copyOf(newMonths, newMonths.length); 414 cachedHashCode = 0; 415 } 416 417 /** 418 * Gets short month strings. For example: "Jan", "Feb", etc. 419 * 420 * <p>If the language requires different forms for formatting and 421 * stand-alone usages, This method returns short month names in 422 * the formatting form. For example, the preferred abbreviation 423 * for January in the Catalan language is <em>de gen.</em> in the 424 * formatting form, while it is <em>gen.</em> in the stand-alone 425 * form. This method returns {@code "de gen."} in this case. Refer 426 * to the <a href="http://unicode.org/reports/tr35/#Calendar_Elements"> 427 * Calendar Elements in the Unicode Locale Data Markup Language 428 * (LDML) specification</a> for more details. 429 * 430 * @return the short month strings. 431 */ getShortMonths()432 public String[] getShortMonths() { 433 return Arrays.copyOf(shortMonths, shortMonths.length); 434 } 435 436 /** 437 * Sets short month strings. For example: "Jan", "Feb", etc. 438 * @param newShortMonths the new short month strings. 439 */ setShortMonths(String[] newShortMonths)440 public void setShortMonths(String[] newShortMonths) { 441 shortMonths = Arrays.copyOf(newShortMonths, newShortMonths.length); 442 cachedHashCode = 0; 443 } 444 445 /** 446 * Gets weekday strings. For example: "Sunday", "Monday", etc. 447 * @return the weekday strings. Use <code>Calendar.SUNDAY</code>, 448 * <code>Calendar.MONDAY</code>, etc. to index the result array. 449 */ getWeekdays()450 public String[] getWeekdays() { 451 return Arrays.copyOf(weekdays, weekdays.length); 452 } 453 454 /** 455 * Sets weekday strings. For example: "Sunday", "Monday", etc. 456 * @param newWeekdays the new weekday strings. The array should 457 * be indexed by <code>Calendar.SUNDAY</code>, 458 * <code>Calendar.MONDAY</code>, etc. 459 */ setWeekdays(String[] newWeekdays)460 public void setWeekdays(String[] newWeekdays) { 461 weekdays = Arrays.copyOf(newWeekdays, newWeekdays.length); 462 cachedHashCode = 0; 463 } 464 465 /** 466 * Gets short weekday strings. For example: "Sun", "Mon", etc. 467 * @return the short weekday strings. Use <code>Calendar.SUNDAY</code>, 468 * <code>Calendar.MONDAY</code>, etc. to index the result array. 469 */ getShortWeekdays()470 public String[] getShortWeekdays() { 471 return Arrays.copyOf(shortWeekdays, shortWeekdays.length); 472 } 473 474 /** 475 * Sets short weekday strings. For example: "Sun", "Mon", etc. 476 * @param newShortWeekdays the new short weekday strings. The array should 477 * be indexed by <code>Calendar.SUNDAY</code>, 478 * <code>Calendar.MONDAY</code>, etc. 479 */ setShortWeekdays(String[] newShortWeekdays)480 public void setShortWeekdays(String[] newShortWeekdays) { 481 shortWeekdays = Arrays.copyOf(newShortWeekdays, newShortWeekdays.length); 482 cachedHashCode = 0; 483 } 484 485 /** 486 * Gets ampm strings. For example: "AM" and "PM". 487 * @return the ampm strings. 488 */ getAmPmStrings()489 public String[] getAmPmStrings() { 490 return Arrays.copyOf(ampms, ampms.length); 491 } 492 493 /** 494 * Sets ampm strings. For example: "AM" and "PM". 495 * @param newAmpms the new ampm strings. 496 */ setAmPmStrings(String[] newAmpms)497 public void setAmPmStrings(String[] newAmpms) { 498 ampms = Arrays.copyOf(newAmpms, newAmpms.length); 499 cachedHashCode = 0; 500 } 501 502 /** 503 * Gets time zone strings. Use of this method is discouraged; use 504 * {@link java.util.TimeZone#getDisplayName() TimeZone.getDisplayName()} 505 * instead. 506 * <p> 507 * The value returned is a 508 * two-dimensional array of strings of size <em>n</em> by <em>m</em>, 509 * where <em>m</em> is at least 5. Each of the <em>n</em> rows is an 510 * entry containing the localized names for a single <code>TimeZone</code>. 511 * Each such row contains (with <code>i</code> ranging from 512 * 0..<em>n</em>-1): 513 * <ul> 514 * <li><code>zoneStrings[i][0]</code> - time zone ID</li> 515 * <li><code>zoneStrings[i][1]</code> - long name of zone in standard 516 * time</li> 517 * <li><code>zoneStrings[i][2]</code> - short name of zone in 518 * standard time</li> 519 * <li><code>zoneStrings[i][3]</code> - long name of zone in daylight 520 * saving time</li> 521 * <li><code>zoneStrings[i][4]</code> - short name of zone in daylight 522 * saving time</li> 523 * </ul> 524 * The zone ID is <em>not</em> localized; it's one of the valid IDs of 525 * the {@link java.util.TimeZone TimeZone} class that are not 526 * <a href="../util/TimeZone.html#CustomID">custom IDs</a>. 527 * All other entries are localized names. If a zone does not implement 528 * daylight saving time, the daylight saving time names should not be used. 529 * <p> 530 * If {@link #setZoneStrings(String[][]) setZoneStrings} has been called 531 * on this <code>DateFormatSymbols</code> instance, then the strings 532 * provided by that call are returned. Otherwise, the returned array 533 * contains names provided by the Java runtime and by installed 534 * {@link java.util.spi.TimeZoneNameProvider TimeZoneNameProvider} 535 * implementations. 536 * 537 * @return the time zone strings. 538 * @see #setZoneStrings(String[][]) 539 */ getZoneStrings()540 public String[][] getZoneStrings() { 541 return getZoneStringsImpl(true); 542 } 543 544 /** 545 * Sets time zone strings. The argument must be a 546 * two-dimensional array of strings of size <em>n</em> by <em>m</em>, 547 * where <em>m</em> is at least 5. Each of the <em>n</em> rows is an 548 * entry containing the localized names for a single <code>TimeZone</code>. 549 * Each such row contains (with <code>i</code> ranging from 550 * 0..<em>n</em>-1): 551 * <ul> 552 * <li><code>zoneStrings[i][0]</code> - time zone ID</li> 553 * <li><code>zoneStrings[i][1]</code> - long name of zone in standard 554 * time</li> 555 * <li><code>zoneStrings[i][2]</code> - short name of zone in 556 * standard time</li> 557 * <li><code>zoneStrings[i][3]</code> - long name of zone in daylight 558 * saving time</li> 559 * <li><code>zoneStrings[i][4]</code> - short name of zone in daylight 560 * saving time</li> 561 * </ul> 562 * The zone ID is <em>not</em> localized; it's one of the valid IDs of 563 * the {@link java.util.TimeZone TimeZone} class that are not 564 * <a href="../util/TimeZone.html#CustomID">custom IDs</a>. 565 * All other entries are localized names. 566 * 567 * @param newZoneStrings the new time zone strings. 568 * @exception IllegalArgumentException if the length of any row in 569 * <code>newZoneStrings</code> is less than 5 570 * @exception NullPointerException if <code>newZoneStrings</code> is null 571 * @see #getZoneStrings() 572 */ setZoneStrings(String[][] newZoneStrings)573 public void setZoneStrings(String[][] newZoneStrings) { 574 String[][] aCopy = new String[newZoneStrings.length][]; 575 for (int i = 0; i < newZoneStrings.length; ++i) { 576 int len = newZoneStrings[i].length; 577 if (len < 5) { 578 throw new IllegalArgumentException(); 579 } 580 aCopy[i] = Arrays.copyOf(newZoneStrings[i], len); 581 } 582 zoneStrings = aCopy; 583 isZoneStringsSet = true; 584 cachedHashCode = 0; 585 } 586 587 /** 588 * Gets localized date-time pattern characters. For example: 'u', 't', etc. 589 * @return the localized date-time pattern characters. 590 */ getLocalPatternChars()591 public String getLocalPatternChars() { 592 return localPatternChars; 593 } 594 595 /** 596 * Sets localized date-time pattern characters. For example: 'u', 't', etc. 597 * @param newLocalPatternChars the new localized date-time 598 * pattern characters. 599 */ setLocalPatternChars(String newLocalPatternChars)600 public void setLocalPatternChars(String newLocalPatternChars) { 601 // Call toString() to throw an NPE in case the argument is null 602 localPatternChars = newLocalPatternChars.toString(); 603 cachedHashCode = 0; 604 } 605 606 /** 607 * Overrides Cloneable 608 */ clone()609 public Object clone() 610 { 611 try 612 { 613 DateFormatSymbols other = (DateFormatSymbols)super.clone(); 614 copyMembers(this, other); 615 return other; 616 } catch (CloneNotSupportedException e) { 617 throw new InternalError(e); 618 } 619 } 620 621 /** 622 * Override hashCode. 623 * Generates a hash code for the DateFormatSymbols object. 624 */ 625 @Override hashCode()626 public int hashCode() { 627 int hashCode = cachedHashCode; 628 if (hashCode == 0) { 629 hashCode = 5; 630 hashCode = 11 * hashCode + Arrays.hashCode(eras); 631 hashCode = 11 * hashCode + Arrays.hashCode(months); 632 hashCode = 11 * hashCode + Arrays.hashCode(shortMonths); 633 hashCode = 11 * hashCode + Arrays.hashCode(weekdays); 634 hashCode = 11 * hashCode + Arrays.hashCode(shortWeekdays); 635 hashCode = 11 * hashCode + Arrays.hashCode(ampms); 636 hashCode = 11 * hashCode + Arrays.deepHashCode(getZoneStringsWrapper()); 637 hashCode = 11 * hashCode + Objects.hashCode(localPatternChars); 638 cachedHashCode = hashCode; 639 } 640 641 return hashCode; 642 } 643 644 /** 645 * Override equals 646 */ equals(Object obj)647 public boolean equals(Object obj) 648 { 649 if (this == obj) return true; 650 if (obj == null || getClass() != obj.getClass()) return false; 651 DateFormatSymbols that = (DateFormatSymbols) obj; 652 return (Arrays.equals(eras, that.eras) 653 && Arrays.equals(months, that.months) 654 && Arrays.equals(shortMonths, that.shortMonths) 655 && Arrays.equals(weekdays, that.weekdays) 656 && Arrays.equals(shortWeekdays, that.shortWeekdays) 657 && Arrays.equals(ampms, that.ampms) 658 && Arrays.deepEquals(getZoneStringsWrapper(), that.getZoneStringsWrapper()) 659 && ((localPatternChars != null 660 && localPatternChars.equals(that.localPatternChars)) 661 || (localPatternChars == null 662 && that.localPatternChars == null))); 663 } 664 665 // =======================privates=============================== 666 667 /** 668 * Useful constant for defining time zone offsets. 669 */ 670 static final int millisPerHour = 60*60*1000; 671 672 /** 673 * Cache to hold DateFormatSymbols instances per Locale. 674 */ 675 private static final ConcurrentMap<Locale, SoftReference<DateFormatSymbols>> cachedInstances 676 = new ConcurrentHashMap<>(3); 677 678 private transient int lastZoneIndex = 0; 679 680 /** 681 * Cached hash code 682 */ 683 transient volatile int cachedHashCode = 0; 684 685 /** 686 * Initializes this DateFormatSymbols with the locale data. This method uses 687 * a cached DateFormatSymbols instance for the given locale if available. If 688 * there's no cached one, this method creates an uninitialized instance and 689 * populates its fields from the resource bundle for the locale, and caches 690 * the instance. Note: zoneStrings isn't initialized in this method. 691 */ initializeData(Locale locale)692 private void initializeData(Locale locale) { 693 SoftReference<DateFormatSymbols> ref = cachedInstances.get(locale); 694 DateFormatSymbols dfs; 695 if (ref == null || (dfs = ref.get()) == null) { 696 if (ref != null) { 697 // Remove the empty SoftReference 698 cachedInstances.remove(locale, ref); 699 } 700 dfs = new DateFormatSymbols(false); 701 702 // Initialize the fields from the ResourceBundle for locale. 703 LocaleProviderAdapter adapter 704 = LocaleProviderAdapter.getAdapter(DateFormatSymbolsProvider.class, locale); 705 // Avoid any potential recursions 706 if (!(adapter instanceof ResourceBundleBasedAdapter)) { 707 adapter = LocaleProviderAdapter.getResourceBundleBased(); 708 } 709 ResourceBundle resource 710 = ((ResourceBundleBasedAdapter)adapter).getLocaleData().getDateFormatData(locale); 711 712 dfs.locale = locale; 713 // JRE and CLDR use different keys 714 // JRE: Eras, short.Eras and narrow.Eras 715 // CLDR: long.Eras, Eras and narrow.Eras 716 if (resource.containsKey("Eras")) { 717 dfs.eras = resource.getStringArray("Eras"); 718 } else if (resource.containsKey("long.Eras")) { 719 dfs.eras = resource.getStringArray("long.Eras"); 720 } else if (resource.containsKey("short.Eras")) { 721 dfs.eras = resource.getStringArray("short.Eras"); 722 } 723 dfs.months = resource.getStringArray("MonthNames"); 724 dfs.shortMonths = resource.getStringArray("MonthAbbreviations"); 725 dfs.ampms = resource.getStringArray("AmPmMarkers"); 726 dfs.localPatternChars = resource.getString("DateTimePatternChars"); 727 728 // Day of week names are stored in a 1-based array. 729 dfs.weekdays = toOneBasedArray(resource.getStringArray("DayNames")); 730 dfs.shortWeekdays = toOneBasedArray(resource.getStringArray("DayAbbreviations")); 731 732 // Put dfs in the cache 733 ref = new SoftReference<>(dfs); 734 SoftReference<DateFormatSymbols> x = cachedInstances.putIfAbsent(locale, ref); 735 if (x != null) { 736 DateFormatSymbols y = x.get(); 737 if (y == null) { 738 // Replace the empty SoftReference with ref. 739 cachedInstances.replace(locale, x, ref); 740 } else { 741 ref = x; 742 dfs = y; 743 } 744 } 745 // If the bundle's locale isn't the target locale, put another cache 746 // entry for the bundle's locale. 747 Locale bundleLocale = resource.getLocale(); 748 if (!bundleLocale.equals(locale)) { 749 SoftReference<DateFormatSymbols> z 750 = cachedInstances.putIfAbsent(bundleLocale, ref); 751 if (z != null && z.get() == null) { 752 cachedInstances.replace(bundleLocale, z, ref); 753 } 754 } 755 } 756 757 // Copy the field values from dfs to this instance. 758 copyMembers(dfs, this); 759 } 760 toOneBasedArray(String[] src)761 private static String[] toOneBasedArray(String[] src) { 762 int len = src.length; 763 String[] dst = new String[len + 1]; 764 dst[0] = ""; 765 for (int i = 0; i < len; i++) { 766 dst[i + 1] = src[i]; 767 } 768 return dst; 769 } 770 771 /** 772 * Package private: used by SimpleDateFormat 773 * Gets the index for the given time zone ID to obtain the time zone 774 * strings for formatting. The time zone ID is just for programmatic 775 * lookup. NOT LOCALIZED!!! 776 * @param ID the given time zone ID. 777 * @return the index of the given time zone ID. Returns -1 if 778 * the given time zone ID can't be located in the DateFormatSymbols object. 779 * @see java.util.SimpleTimeZone 780 */ getZoneIndex(String ID)781 final int getZoneIndex(String ID) { 782 String[][] zoneStrings = getZoneStringsWrapper(); 783 784 /* 785 * getZoneIndex has been re-written for performance reasons. instead of 786 * traversing the zoneStrings array every time, we cache the last used zone 787 * index 788 */ 789 if (lastZoneIndex < zoneStrings.length && ID.equals(zoneStrings[lastZoneIndex][0])) { 790 return lastZoneIndex; 791 } 792 793 /* slow path, search entire list */ 794 for (int index = 0; index < zoneStrings.length; index++) { 795 if (ID.equals(zoneStrings[index][0])) { 796 lastZoneIndex = index; 797 return index; 798 } 799 } 800 801 return -1; 802 } 803 804 /** 805 * Wrapper method to the getZoneStrings(), which is called from inside 806 * the java.text package and not to mutate the returned arrays, so that 807 * it does not need to create a defensive copy. 808 */ getZoneStringsWrapper()809 final String[][] getZoneStringsWrapper() { 810 if (isSubclassObject()) { 811 return getZoneStrings(); 812 } else { 813 return getZoneStringsImpl(false); 814 } 815 } 816 getZoneStringsImpl(boolean needsCopy)817 private String[][] getZoneStringsImpl(boolean needsCopy) { 818 if (zoneStrings == null) { 819 zoneStrings = TimeZoneNameUtility.getZoneStrings(locale); 820 } 821 822 if (!needsCopy) { 823 return zoneStrings; 824 } 825 826 int len = zoneStrings.length; 827 String[][] aCopy = new String[len][]; 828 for (int i = 0; i < len; i++) { 829 aCopy[i] = Arrays.copyOf(zoneStrings[i], zoneStrings[i].length); 830 } 831 return aCopy; 832 } 833 isSubclassObject()834 private boolean isSubclassObject() { 835 return !getClass().getName().equals("java.text.DateFormatSymbols"); 836 } 837 838 /** 839 * Clones all the data members from the source DateFormatSymbols to 840 * the target DateFormatSymbols. 841 * 842 * @param src the source DateFormatSymbols. 843 * @param dst the target DateFormatSymbols. 844 */ copyMembers(DateFormatSymbols src, DateFormatSymbols dst)845 private void copyMembers(DateFormatSymbols src, DateFormatSymbols dst) 846 { 847 dst.locale = src.locale; 848 dst.eras = Arrays.copyOf(src.eras, src.eras.length); 849 dst.months = Arrays.copyOf(src.months, src.months.length); 850 dst.shortMonths = Arrays.copyOf(src.shortMonths, src.shortMonths.length); 851 dst.weekdays = Arrays.copyOf(src.weekdays, src.weekdays.length); 852 dst.shortWeekdays = Arrays.copyOf(src.shortWeekdays, src.shortWeekdays.length); 853 dst.ampms = Arrays.copyOf(src.ampms, src.ampms.length); 854 if (src.zoneStrings != null) { 855 dst.zoneStrings = src.getZoneStringsImpl(true); 856 } else { 857 dst.zoneStrings = null; 858 } 859 dst.localPatternChars = src.localPatternChars; 860 dst.cachedHashCode = 0; 861 } 862 863 /** 864 * Write out the default serializable data, after ensuring the 865 * <code>zoneStrings</code> field is initialized in order to make 866 * sure the backward compatibility. 867 * 868 * @since 1.6 869 */ writeObject(ObjectOutputStream stream)870 private void writeObject(ObjectOutputStream stream) throws IOException { 871 if (zoneStrings == null) { 872 zoneStrings = TimeZoneNameUtility.getZoneStrings(locale); 873 } 874 stream.defaultWriteObject(); 875 } 876 } 877