J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005-2006 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 | package java.util; |
| 27 | |
| 28 | import java.io.IOException; |
| 29 | import java.io.ObjectInputStream; |
| 30 | import sun.util.calendar.BaseCalendar; |
| 31 | import sun.util.calendar.CalendarDate; |
| 32 | import sun.util.calendar.CalendarSystem; |
| 33 | import sun.util.calendar.CalendarUtils; |
| 34 | import sun.util.calendar.Era; |
| 35 | import sun.util.calendar.Gregorian; |
| 36 | import sun.util.calendar.LocalGregorianCalendar; |
| 37 | import sun.util.calendar.ZoneInfo; |
| 38 | import sun.util.resources.LocaleData; |
| 39 | |
| 40 | /** |
| 41 | * <code>JapaneseImperialCalendar</code> implements a Japanese |
| 42 | * calendar system in which the imperial era-based year numbering is |
| 43 | * supported from the Meiji era. The following are the eras supported |
| 44 | * by this calendar system. |
| 45 | * <pre><tt> |
| 46 | * ERA value Era name Since (in Gregorian) |
| 47 | * ------------------------------------------------------ |
| 48 | * 0 N/A N/A |
| 49 | * 1 Meiji 1868-01-01 midnight local time |
| 50 | * 2 Taisho 1912-07-30 midnight local time |
| 51 | * 3 Showa 1926-12-25 midnight local time |
| 52 | * 4 Heisei 1989-01-08 midnight local time |
| 53 | * ------------------------------------------------------ |
| 54 | * </tt></pre> |
| 55 | * |
| 56 | * <p><code>ERA</code> value 0 specifies the years before Meiji and |
| 57 | * the Gregorian year values are used. Unlike {@link |
| 58 | * GregorianCalendar}, the Julian to Gregorian transition is not |
| 59 | * supported because it doesn't make any sense to the Japanese |
| 60 | * calendar systems used before Meiji. To represent the years before |
| 61 | * Gregorian year 1, 0 and negative values are used. The Japanese |
| 62 | * Imperial rescripts and government decrees don't specify how to deal |
| 63 | * with time differences for applying the era transitions. This |
| 64 | * calendar implementation assumes local time for all transitions. |
| 65 | * |
| 66 | * @author Masayoshi Okutsu |
| 67 | * @since 1.6 |
| 68 | */ |
| 69 | class JapaneseImperialCalendar extends Calendar { |
| 70 | /* |
| 71 | * Implementation Notes |
| 72 | * |
| 73 | * This implementation uses |
| 74 | * sun.util.calendar.LocalGregorianCalendar to perform most of the |
| 75 | * calendar calculations. LocalGregorianCalendar is configurable |
| 76 | * and reads <JRE_HOME>/lib/calendars.properties at the start-up. |
| 77 | */ |
| 78 | |
| 79 | /** |
| 80 | * The ERA constant designating the era before Meiji. |
| 81 | */ |
| 82 | public static final int BEFORE_MEIJI = 0; |
| 83 | |
| 84 | /** |
| 85 | * The ERA constant designating the Meiji era. |
| 86 | */ |
| 87 | public static final int MEIJI = 1; |
| 88 | |
| 89 | /** |
| 90 | * The ERA constant designating the Taisho era. |
| 91 | */ |
| 92 | public static final int TAISHO = 2; |
| 93 | |
| 94 | /** |
| 95 | * The ERA constant designating the Showa era. |
| 96 | */ |
| 97 | public static final int SHOWA = 3; |
| 98 | |
| 99 | /** |
| 100 | * The ERA constant designating the Heisei era. |
| 101 | */ |
| 102 | public static final int HEISEI = 4; |
| 103 | |
| 104 | private static final int EPOCH_OFFSET = 719163; // Fixed date of January 1, 1970 (Gregorian) |
| 105 | private static final int EPOCH_YEAR = 1970; |
| 106 | |
| 107 | // Useful millisecond constants. Although ONE_DAY and ONE_WEEK can fit |
| 108 | // into ints, they must be longs in order to prevent arithmetic overflow |
| 109 | // when performing (bug 4173516). |
| 110 | private static final int ONE_SECOND = 1000; |
| 111 | private static final int ONE_MINUTE = 60*ONE_SECOND; |
| 112 | private static final int ONE_HOUR = 60*ONE_MINUTE; |
| 113 | private static final long ONE_DAY = 24*ONE_HOUR; |
| 114 | private static final long ONE_WEEK = 7*ONE_DAY; |
| 115 | |
| 116 | // Reference to the sun.util.calendar.LocalGregorianCalendar instance (singleton). |
| 117 | private static final LocalGregorianCalendar jcal |
| 118 | = (LocalGregorianCalendar) CalendarSystem.forName("japanese"); |
| 119 | |
| 120 | // Gregorian calendar instance. This is required because era |
| 121 | // transition dates are given in Gregorian dates. |
| 122 | private static final Gregorian gcal = CalendarSystem.getGregorianCalendar(); |
| 123 | |
| 124 | // The Era instance representing "before Meiji". |
| 125 | private static final Era BEFORE_MEIJI_ERA = new Era("BeforeMeiji", "BM", Long.MIN_VALUE, false); |
| 126 | |
| 127 | // Imperial eras. The sun.util.calendar.LocalGregorianCalendar |
| 128 | // doesn't have an Era representing before Meiji, which is |
| 129 | // inconvenient for a Calendar. So, era[0] is a reference to |
| 130 | // BEFORE_MEIJI_ERA. |
| 131 | private static final Era[] eras; |
| 132 | |
| 133 | // Fixed date of the first date of each era. |
| 134 | private static final long[] sinceFixedDates; |
| 135 | |
| 136 | /* |
| 137 | * <pre> |
| 138 | * Greatest Least |
| 139 | * Field name Minimum Minimum Maximum Maximum |
| 140 | * ---------- ------- ------- ------- ------- |
| 141 | * ERA 0 0 1 1 |
| 142 | * YEAR -292275055 1 ? ? |
| 143 | * MONTH 0 0 11 11 |
| 144 | * WEEK_OF_YEAR 1 1 52* 53 |
| 145 | * WEEK_OF_MONTH 0 0 4* 6 |
| 146 | * DAY_OF_MONTH 1 1 28* 31 |
| 147 | * DAY_OF_YEAR 1 1 365* 366 |
| 148 | * DAY_OF_WEEK 1 1 7 7 |
| 149 | * DAY_OF_WEEK_IN_MONTH -1 -1 4* 6 |
| 150 | * AM_PM 0 0 1 1 |
| 151 | * HOUR 0 0 11 11 |
| 152 | * HOUR_OF_DAY 0 0 23 23 |
| 153 | * MINUTE 0 0 59 59 |
| 154 | * SECOND 0 0 59 59 |
| 155 | * MILLISECOND 0 0 999 999 |
| 156 | * ZONE_OFFSET -13:00 -13:00 14:00 14:00 |
| 157 | * DST_OFFSET 0:00 0:00 0:20 2:00 |
| 158 | * </pre> |
| 159 | * *: depends on eras |
| 160 | */ |
| 161 | static final int MIN_VALUES[] = { |
| 162 | 0, // ERA |
| 163 | -292275055, // YEAR |
| 164 | JANUARY, // MONTH |
| 165 | 1, // WEEK_OF_YEAR |
| 166 | 0, // WEEK_OF_MONTH |
| 167 | 1, // DAY_OF_MONTH |
| 168 | 1, // DAY_OF_YEAR |
| 169 | SUNDAY, // DAY_OF_WEEK |
| 170 | 1, // DAY_OF_WEEK_IN_MONTH |
| 171 | AM, // AM_PM |
| 172 | 0, // HOUR |
| 173 | 0, // HOUR_OF_DAY |
| 174 | 0, // MINUTE |
| 175 | 0, // SECOND |
| 176 | 0, // MILLISECOND |
| 177 | -13*ONE_HOUR, // ZONE_OFFSET (UNIX compatibility) |
| 178 | 0 // DST_OFFSET |
| 179 | }; |
| 180 | static final int LEAST_MAX_VALUES[] = { |
| 181 | 0, // ERA (initialized later) |
| 182 | 0, // YEAR (initialized later) |
| 183 | JANUARY, // MONTH (Showa 64 ended in January.) |
| 184 | 0, // WEEK_OF_YEAR (Showa 1 has only 6 days which could be 0 weeks.) |
| 185 | 4, // WEEK_OF_MONTH |
| 186 | 28, // DAY_OF_MONTH |
| 187 | 0, // DAY_OF_YEAR (initialized later) |
| 188 | SATURDAY, // DAY_OF_WEEK |
| 189 | 4, // DAY_OF_WEEK_IN |
| 190 | PM, // AM_PM |
| 191 | 11, // HOUR |
| 192 | 23, // HOUR_OF_DAY |
| 193 | 59, // MINUTE |
| 194 | 59, // SECOND |
| 195 | 999, // MILLISECOND |
| 196 | 14*ONE_HOUR, // ZONE_OFFSET |
| 197 | 20*ONE_MINUTE // DST_OFFSET (historical least maximum) |
| 198 | }; |
| 199 | static final int MAX_VALUES[] = { |
| 200 | 0, // ERA |
| 201 | 292278994, // YEAR |
| 202 | DECEMBER, // MONTH |
| 203 | 53, // WEEK_OF_YEAR |
| 204 | 6, // WEEK_OF_MONTH |
| 205 | 31, // DAY_OF_MONTH |
| 206 | 366, // DAY_OF_YEAR |
| 207 | SATURDAY, // DAY_OF_WEEK |
| 208 | 6, // DAY_OF_WEEK_IN |
| 209 | PM, // AM_PM |
| 210 | 11, // HOUR |
| 211 | 23, // HOUR_OF_DAY |
| 212 | 59, // MINUTE |
| 213 | 59, // SECOND |
| 214 | 999, // MILLISECOND |
| 215 | 14*ONE_HOUR, // ZONE_OFFSET |
| 216 | 2*ONE_HOUR // DST_OFFSET (double summer time) |
| 217 | }; |
| 218 | |
| 219 | // Proclaim serialization compatibility with JDK 1.6 |
| 220 | private static final long serialVersionUID = -3364572813905467929L; |
| 221 | |
| 222 | static { |
| 223 | Era[] es = jcal.getEras(); |
| 224 | int length = es.length + 1; |
| 225 | eras = new Era[length]; |
| 226 | sinceFixedDates = new long[length]; |
| 227 | |
| 228 | // eras[BEFORE_MEIJI] and sinceFixedDate[BEFORE_MEIJI] are the |
| 229 | // same as Gregorian. |
| 230 | int index = BEFORE_MEIJI; |
| 231 | sinceFixedDates[index] = gcal.getFixedDate(BEFORE_MEIJI_ERA.getSinceDate()); |
| 232 | eras[index++] = BEFORE_MEIJI_ERA; |
| 233 | for (Era e : es) { |
| 234 | CalendarDate d = e.getSinceDate(); |
| 235 | sinceFixedDates[index] = gcal.getFixedDate(d); |
| 236 | eras[index++] = e; |
| 237 | } |
| 238 | |
| 239 | LEAST_MAX_VALUES[ERA] = MAX_VALUES[ERA] = eras.length - 1; |
| 240 | |
| 241 | // Calculate the least maximum year and least day of Year |
| 242 | // values. The following code assumes that there's at most one |
| 243 | // era transition in a Gregorian year. |
| 244 | int year = Integer.MAX_VALUE; |
| 245 | int dayOfYear = Integer.MAX_VALUE; |
| 246 | CalendarDate date = gcal.newCalendarDate(TimeZone.NO_TIMEZONE); |
| 247 | for (int i = 1; i < eras.length; i++) { |
| 248 | long fd = sinceFixedDates[i]; |
| 249 | CalendarDate transitionDate = eras[i].getSinceDate(); |
| 250 | date.setDate(transitionDate.getYear(), BaseCalendar.JANUARY, 1); |
| 251 | long fdd = gcal.getFixedDate(date); |
| 252 | dayOfYear = Math.min((int)(fdd - fd), dayOfYear); |
| 253 | date.setDate(transitionDate.getYear(), BaseCalendar.DECEMBER, 31); |
| 254 | fdd = gcal.getFixedDate(date) + 1; |
| 255 | dayOfYear = Math.min((int)(fd - fdd), dayOfYear); |
| 256 | |
| 257 | LocalGregorianCalendar.Date lgd = getCalendarDate(fd - 1); |
| 258 | int y = lgd.getYear(); |
| 259 | // Unless the first year starts from January 1, the actual |
| 260 | // max value could be one year short. For example, if it's |
| 261 | // Showa 63 January 8, 63 is the actual max value since |
| 262 | // Showa 64 January 8 doesn't exist. |
| 263 | if (!(lgd.getMonth() == BaseCalendar.JANUARY && lgd.getDayOfMonth() == 1)) |
| 264 | y--; |
| 265 | year = Math.min(y, year); |
| 266 | } |
| 267 | LEAST_MAX_VALUES[YEAR] = year; // Max year could be smaller than this value. |
| 268 | LEAST_MAX_VALUES[DAY_OF_YEAR] = dayOfYear; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * jdate always has a sun.util.calendar.LocalGregorianCalendar.Date instance to |
| 273 | * avoid overhead of creating it for each calculation. |
| 274 | */ |
| 275 | private transient LocalGregorianCalendar.Date jdate; |
| 276 | |
| 277 | /** |
| 278 | * Temporary int[2] to get time zone offsets. zoneOffsets[0] gets |
| 279 | * the GMT offset value and zoneOffsets[1] gets the daylight saving |
| 280 | * value. |
| 281 | */ |
| 282 | private transient int[] zoneOffsets; |
| 283 | |
| 284 | /** |
| 285 | * Temporary storage for saving original fields[] values in |
| 286 | * non-lenient mode. |
| 287 | */ |
| 288 | private transient int[] originalFields; |
| 289 | |
| 290 | /** |
| 291 | * Constructs a <code>JapaneseImperialCalendar</code> based on the current time |
| 292 | * in the given time zone with the given locale. |
| 293 | * |
| 294 | * @param zone the given time zone. |
| 295 | * @param aLocale the given locale. |
| 296 | */ |
| 297 | public JapaneseImperialCalendar(TimeZone zone, Locale aLocale) { |
| 298 | super(zone, aLocale); |
| 299 | jdate = jcal.newCalendarDate(zone); |
| 300 | setTimeInMillis(System.currentTimeMillis()); |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * Compares this <code>JapaneseImperialCalendar</code> to the specified |
| 305 | * <code>Object</code>. The result is <code>true</code> if and |
| 306 | * only if the argument is a <code>JapaneseImperialCalendar</code> object |
| 307 | * that represents the same time value (millisecond offset from |
| 308 | * the <a href="Calendar.html#Epoch">Epoch</a>) under the same |
| 309 | * <code>Calendar</code> parameters. |
| 310 | * |
| 311 | * @param obj the object to compare with. |
| 312 | * @return <code>true</code> if this object is equal to <code>obj</code>; |
| 313 | * <code>false</code> otherwise. |
| 314 | * @see Calendar#compareTo(Calendar) |
| 315 | */ |
| 316 | public boolean equals(Object obj) { |
| 317 | return obj instanceof JapaneseImperialCalendar && |
| 318 | super.equals(obj); |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * Generates the hash code for this |
| 323 | * <code>JapaneseImperialCalendar</code> object. |
| 324 | */ |
| 325 | public int hashCode() { |
| 326 | return super.hashCode() ^ jdate.hashCode(); |
| 327 | } |
| 328 | |
| 329 | /** |
| 330 | * Adds the specified (signed) amount of time to the given calendar field, |
| 331 | * based on the calendar's rules. |
| 332 | * |
| 333 | * <p><em>Add rule 1</em>. The value of <code>field</code> |
| 334 | * after the call minus the value of <code>field</code> before the |
| 335 | * call is <code>amount</code>, modulo any overflow that has occurred in |
| 336 | * <code>field</code>. Overflow occurs when a field value exceeds its |
| 337 | * range and, as a result, the next larger field is incremented or |
| 338 | * decremented and the field value is adjusted back into its range.</p> |
| 339 | * |
| 340 | * <p><em>Add rule 2</em>. If a smaller field is expected to be |
| 341 | * invariant, but it is impossible for it to be equal to its |
| 342 | * prior value because of changes in its minimum or maximum after |
| 343 | * <code>field</code> is changed, then its value is adjusted to be as close |
| 344 | * as possible to its expected value. A smaller field represents a |
| 345 | * smaller unit of time. <code>HOUR</code> is a smaller field than |
| 346 | * <code>DAY_OF_MONTH</code>. No adjustment is made to smaller fields |
| 347 | * that are not expected to be invariant. The calendar system |
| 348 | * determines what fields are expected to be invariant.</p> |
| 349 | * |
| 350 | * @param field the calendar field. |
| 351 | * @param amount the amount of date or time to be added to the field. |
| 352 | * @exception IllegalArgumentException if <code>field</code> is |
| 353 | * <code>ZONE_OFFSET</code>, <code>DST_OFFSET</code>, or unknown, |
| 354 | * or if any calendar fields have out-of-range values in |
| 355 | * non-lenient mode. |
| 356 | */ |
| 357 | public void add(int field, int amount) { |
| 358 | // If amount == 0, do nothing even the given field is out of |
| 359 | // range. This is tested by JCK. |
| 360 | if (amount == 0) { |
| 361 | return; // Do nothing! |
| 362 | } |
| 363 | |
| 364 | if (field < 0 || field >= ZONE_OFFSET) { |
| 365 | throw new IllegalArgumentException(); |
| 366 | } |
| 367 | |
| 368 | // Sync the time and calendar fields. |
| 369 | complete(); |
| 370 | |
| 371 | if (field == YEAR) { |
| 372 | LocalGregorianCalendar.Date d = (LocalGregorianCalendar.Date) jdate.clone(); |
| 373 | d.addYear(amount); |
| 374 | pinDayOfMonth(d); |
| 375 | set(ERA, getEraIndex(d)); |
| 376 | set(YEAR, d.getYear()); |
| 377 | set(MONTH, d.getMonth() - 1); |
| 378 | set(DAY_OF_MONTH, d.getDayOfMonth()); |
| 379 | } else if (field == MONTH) { |
| 380 | LocalGregorianCalendar.Date d = (LocalGregorianCalendar.Date) jdate.clone(); |
| 381 | d.addMonth(amount); |
| 382 | pinDayOfMonth(d); |
| 383 | set(ERA, getEraIndex(d)); |
| 384 | set(YEAR, d.getYear()); |
| 385 | set(MONTH, d.getMonth() - 1); |
| 386 | set(DAY_OF_MONTH, d.getDayOfMonth()); |
| 387 | } else if (field == ERA) { |
| 388 | int era = internalGet(ERA) + amount; |
| 389 | if (era < 0) { |
| 390 | era = 0; |
| 391 | } else if (era > eras.length - 1) { |
| 392 | era = eras.length - 1; |
| 393 | } |
| 394 | set(ERA, era); |
| 395 | } else { |
| 396 | long delta = amount; |
| 397 | long timeOfDay = 0; |
| 398 | switch (field) { |
| 399 | // Handle the time fields here. Convert the given |
| 400 | // amount to milliseconds and call setTimeInMillis. |
| 401 | case HOUR: |
| 402 | case HOUR_OF_DAY: |
| 403 | delta *= 60 * 60 * 1000; // hours to milliseconds |
| 404 | break; |
| 405 | |
| 406 | case MINUTE: |
| 407 | delta *= 60 * 1000; // minutes to milliseconds |
| 408 | break; |
| 409 | |
| 410 | case SECOND: |
| 411 | delta *= 1000; // seconds to milliseconds |
| 412 | break; |
| 413 | |
| 414 | case MILLISECOND: |
| 415 | break; |
| 416 | |
| 417 | // Handle week, day and AM_PM fields which involves |
| 418 | // time zone offset change adjustment. Convert the |
| 419 | // given amount to the number of days. |
| 420 | case WEEK_OF_YEAR: |
| 421 | case WEEK_OF_MONTH: |
| 422 | case DAY_OF_WEEK_IN_MONTH: |
| 423 | delta *= 7; |
| 424 | break; |
| 425 | |
| 426 | case DAY_OF_MONTH: // synonym of DATE |
| 427 | case DAY_OF_YEAR: |
| 428 | case DAY_OF_WEEK: |
| 429 | break; |
| 430 | |
| 431 | case AM_PM: |
| 432 | // Convert the amount to the number of days (delta) |
| 433 | // and +12 or -12 hours (timeOfDay). |
| 434 | delta = amount / 2; |
| 435 | timeOfDay = 12 * (amount % 2); |
| 436 | break; |
| 437 | } |
| 438 | |
| 439 | // The time fields don't require time zone offset change |
| 440 | // adjustment. |
| 441 | if (field >= HOUR) { |
| 442 | setTimeInMillis(time + delta); |
| 443 | return; |
| 444 | } |
| 445 | |
| 446 | // The rest of the fields (week, day or AM_PM fields) |
| 447 | // require time zone offset (both GMT and DST) change |
| 448 | // adjustment. |
| 449 | |
| 450 | // Translate the current time to the fixed date and time |
| 451 | // of the day. |
| 452 | long fd = cachedFixedDate; |
| 453 | timeOfDay += internalGet(HOUR_OF_DAY); |
| 454 | timeOfDay *= 60; |
| 455 | timeOfDay += internalGet(MINUTE); |
| 456 | timeOfDay *= 60; |
| 457 | timeOfDay += internalGet(SECOND); |
| 458 | timeOfDay *= 1000; |
| 459 | timeOfDay += internalGet(MILLISECOND); |
| 460 | if (timeOfDay >= ONE_DAY) { |
| 461 | fd++; |
| 462 | timeOfDay -= ONE_DAY; |
| 463 | } else if (timeOfDay < 0) { |
| 464 | fd--; |
| 465 | timeOfDay += ONE_DAY; |
| 466 | } |
| 467 | |
| 468 | fd += delta; // fd is the expected fixed date after the calculation |
| 469 | int zoneOffset = internalGet(ZONE_OFFSET) + internalGet(DST_OFFSET); |
| 470 | setTimeInMillis((fd - EPOCH_OFFSET) * ONE_DAY + timeOfDay - zoneOffset); |
| 471 | zoneOffset -= internalGet(ZONE_OFFSET) + internalGet(DST_OFFSET); |
| 472 | // If the time zone offset has changed, then adjust the difference. |
| 473 | if (zoneOffset != 0) { |
| 474 | setTimeInMillis(time + zoneOffset); |
| 475 | long fd2 = cachedFixedDate; |
| 476 | // If the adjustment has changed the date, then take |
| 477 | // the previous one. |
| 478 | if (fd2 != fd) { |
| 479 | setTimeInMillis(time - zoneOffset); |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | public void roll(int field, boolean up) { |
| 486 | roll(field, up ? +1 : -1); |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * Adds a signed amount to the specified calendar field without changing larger fields. |
| 491 | * A negative roll amount means to subtract from field without changing |
| 492 | * larger fields. If the specified amount is 0, this method performs nothing. |
| 493 | * |
| 494 | * <p>This method calls {@link #complete()} before adding the |
| 495 | * amount so that all the calendar fields are normalized. If there |
| 496 | * is any calendar field having an out-of-range value in non-lenient mode, then an |
| 497 | * <code>IllegalArgumentException</code> is thrown. |
| 498 | * |
| 499 | * @param field the calendar field. |
| 500 | * @param amount the signed amount to add to <code>field</code>. |
| 501 | * @exception IllegalArgumentException if <code>field</code> is |
| 502 | * <code>ZONE_OFFSET</code>, <code>DST_OFFSET</code>, or unknown, |
| 503 | * or if any calendar fields have out-of-range values in |
| 504 | * non-lenient mode. |
| 505 | * @see #roll(int,boolean) |
| 506 | * @see #add(int,int) |
| 507 | * @see #set(int,int) |
| 508 | */ |
| 509 | public void roll(int field, int amount) { |
| 510 | // If amount == 0, do nothing even the given field is out of |
| 511 | // range. This is tested by JCK. |
| 512 | if (amount == 0) { |
| 513 | return; |
| 514 | } |
| 515 | |
| 516 | if (field < 0 || field >= ZONE_OFFSET) { |
| 517 | throw new IllegalArgumentException(); |
| 518 | } |
| 519 | |
| 520 | // Sync the time and calendar fields. |
| 521 | complete(); |
| 522 | |
| 523 | int min = getMinimum(field); |
| 524 | int max = getMaximum(field); |
| 525 | |
| 526 | switch (field) { |
| 527 | case ERA: |
| 528 | case AM_PM: |
| 529 | case MINUTE: |
| 530 | case SECOND: |
| 531 | case MILLISECOND: |
| 532 | // These fields are handled simply, since they have fixed |
| 533 | // minima and maxima. Other fields are complicated, since |
| 534 | // the range within they must roll varies depending on the |
| 535 | // date, a time zone and the era transitions. |
| 536 | break; |
| 537 | |
| 538 | case HOUR: |
| 539 | case HOUR_OF_DAY: |
| 540 | { |
| 541 | int unit = max + 1; // 12 or 24 hours |
| 542 | int h = internalGet(field); |
| 543 | int nh = (h + amount) % unit; |
| 544 | if (nh < 0) { |
| 545 | nh += unit; |
| 546 | } |
| 547 | time += ONE_HOUR * (nh - h); |
| 548 | |
| 549 | // The day might have changed, which could happen if |
| 550 | // the daylight saving time transition brings it to |
| 551 | // the next day, although it's very unlikely. But we |
| 552 | // have to make sure not to change the larger fields. |
| 553 | CalendarDate d = jcal.getCalendarDate(time, getZone()); |
| 554 | if (internalGet(DAY_OF_MONTH) != d.getDayOfMonth()) { |
| 555 | d.setEra(jdate.getEra()); |
| 556 | d.setDate(internalGet(YEAR), |
| 557 | internalGet(MONTH) + 1, |
| 558 | internalGet(DAY_OF_MONTH)); |
| 559 | if (field == HOUR) { |
| 560 | assert (internalGet(AM_PM) == PM); |
| 561 | d.addHours(+12); // restore PM |
| 562 | } |
| 563 | time = jcal.getTime(d); |
| 564 | } |
| 565 | int hourOfDay = d.getHours(); |
| 566 | internalSet(field, hourOfDay % unit); |
| 567 | if (field == HOUR) { |
| 568 | internalSet(HOUR_OF_DAY, hourOfDay); |
| 569 | } else { |
| 570 | internalSet(AM_PM, hourOfDay / 12); |
| 571 | internalSet(HOUR, hourOfDay % 12); |
| 572 | } |
| 573 | |
| 574 | // Time zone offset and/or daylight saving might have changed. |
| 575 | int zoneOffset = d.getZoneOffset(); |
| 576 | int saving = d.getDaylightSaving(); |
| 577 | internalSet(ZONE_OFFSET, zoneOffset - saving); |
| 578 | internalSet(DST_OFFSET, saving); |
| 579 | return; |
| 580 | } |
| 581 | |
| 582 | case YEAR: |
| 583 | min = getActualMinimum(field); |
| 584 | max = getActualMaximum(field); |
| 585 | break; |
| 586 | |
| 587 | case MONTH: |
| 588 | // Rolling the month involves both pinning the final value to [0, 11] |
| 589 | // and adjusting the DAY_OF_MONTH if necessary. We only adjust the |
| 590 | // DAY_OF_MONTH if, after updating the MONTH field, it is illegal. |
| 591 | // E.g., <jan31>.roll(MONTH, 1) -> <feb28> or <feb29>. |
| 592 | { |
| 593 | if (!isTransitionYear(jdate.getNormalizedYear())) { |
| 594 | int year = jdate.getYear(); |
| 595 | if (year == getMaximum(YEAR)) { |
| 596 | CalendarDate jd = jcal.getCalendarDate(time, getZone()); |
| 597 | CalendarDate d = jcal.getCalendarDate(Long.MAX_VALUE, getZone()); |
| 598 | max = d.getMonth() - 1; |
| 599 | int n = getRolledValue(internalGet(field), amount, min, max); |
| 600 | if (n == max) { |
| 601 | // To avoid overflow, use an equivalent year. |
| 602 | jd.addYear(-400); |
| 603 | jd.setMonth(n + 1); |
| 604 | if (jd.getDayOfMonth() > d.getDayOfMonth()) { |
| 605 | jd.setDayOfMonth(d.getDayOfMonth()); |
| 606 | jcal.normalize(jd); |
| 607 | } |
| 608 | if (jd.getDayOfMonth() == d.getDayOfMonth() |
| 609 | && jd.getTimeOfDay() > d.getTimeOfDay()) { |
| 610 | jd.setMonth(n + 1); |
| 611 | jd.setDayOfMonth(d.getDayOfMonth() - 1); |
| 612 | jcal.normalize(jd); |
| 613 | // Month may have changed by the normalization. |
| 614 | n = jd.getMonth() - 1; |
| 615 | } |
| 616 | set(DAY_OF_MONTH, jd.getDayOfMonth()); |
| 617 | } |
| 618 | set(MONTH, n); |
| 619 | } else if (year == getMinimum(YEAR)) { |
| 620 | CalendarDate jd = jcal.getCalendarDate(time, getZone()); |
| 621 | CalendarDate d = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 622 | min = d.getMonth() - 1; |
| 623 | int n = getRolledValue(internalGet(field), amount, min, max); |
| 624 | if (n == min) { |
| 625 | // To avoid underflow, use an equivalent year. |
| 626 | jd.addYear(+400); |
| 627 | jd.setMonth(n + 1); |
| 628 | if (jd.getDayOfMonth() < d.getDayOfMonth()) { |
| 629 | jd.setDayOfMonth(d.getDayOfMonth()); |
| 630 | jcal.normalize(jd); |
| 631 | } |
| 632 | if (jd.getDayOfMonth() == d.getDayOfMonth() |
| 633 | && jd.getTimeOfDay() < d.getTimeOfDay()) { |
| 634 | jd.setMonth(n + 1); |
| 635 | jd.setDayOfMonth(d.getDayOfMonth() + 1); |
| 636 | jcal.normalize(jd); |
| 637 | // Month may have changed by the normalization. |
| 638 | n = jd.getMonth() - 1; |
| 639 | } |
| 640 | set(DAY_OF_MONTH, jd.getDayOfMonth()); |
| 641 | } |
| 642 | set(MONTH, n); |
| 643 | } else { |
| 644 | int mon = (internalGet(MONTH) + amount) % 12; |
| 645 | if (mon < 0) { |
| 646 | mon += 12; |
| 647 | } |
| 648 | set(MONTH, mon); |
| 649 | |
| 650 | // Keep the day of month in the range. We |
| 651 | // don't want to spill over into the next |
| 652 | // month; e.g., we don't want jan31 + 1 mo -> |
| 653 | // feb31 -> mar3. |
| 654 | int monthLen = monthLength(mon); |
| 655 | if (internalGet(DAY_OF_MONTH) > monthLen) { |
| 656 | set(DAY_OF_MONTH, monthLen); |
| 657 | } |
| 658 | } |
| 659 | } else { |
| 660 | int eraIndex = getEraIndex(jdate); |
| 661 | CalendarDate transition = null; |
| 662 | if (jdate.getYear() == 1) { |
| 663 | transition = eras[eraIndex].getSinceDate(); |
| 664 | min = transition.getMonth() - 1; |
| 665 | } else { |
| 666 | if (eraIndex < eras.length - 1) { |
| 667 | transition = eras[eraIndex + 1].getSinceDate(); |
| 668 | if (transition.getYear() == jdate.getNormalizedYear()) { |
| 669 | max = transition.getMonth() - 1; |
| 670 | if (transition.getDayOfMonth() == 1) { |
| 671 | max--; |
| 672 | } |
| 673 | } |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | if (min == max) { |
| 678 | // The year has only one month. No need to |
| 679 | // process further. (Showa Gan-nen (year 1) |
| 680 | // and the last year have only one month.) |
| 681 | return; |
| 682 | } |
| 683 | int n = getRolledValue(internalGet(field), amount, min, max); |
| 684 | set(MONTH, n); |
| 685 | if (n == min) { |
| 686 | if (!(transition.getMonth() == BaseCalendar.JANUARY |
| 687 | && transition.getDayOfMonth() == 1)) { |
| 688 | if (jdate.getDayOfMonth() < transition.getDayOfMonth()) { |
| 689 | set(DAY_OF_MONTH, transition.getDayOfMonth()); |
| 690 | } |
| 691 | } |
| 692 | } else if (n == max && (transition.getMonth() - 1 == n)) { |
| 693 | int dom = transition.getDayOfMonth(); |
| 694 | if (jdate.getDayOfMonth() >= dom) { |
| 695 | set(DAY_OF_MONTH, dom - 1); |
| 696 | } |
| 697 | } |
| 698 | } |
| 699 | return; |
| 700 | } |
| 701 | |
| 702 | case WEEK_OF_YEAR: |
| 703 | { |
| 704 | int y = jdate.getNormalizedYear(); |
| 705 | max = getActualMaximum(WEEK_OF_YEAR); |
| 706 | set(DAY_OF_WEEK, internalGet(DAY_OF_WEEK)); // update stamp[field] |
| 707 | int woy = internalGet(WEEK_OF_YEAR); |
| 708 | int value = woy + amount; |
| 709 | if (!isTransitionYear(jdate.getNormalizedYear())) { |
| 710 | int year = jdate.getYear(); |
| 711 | if (year == getMaximum(YEAR)) { |
| 712 | max = getActualMaximum(WEEK_OF_YEAR); |
| 713 | } else if (year == getMinimum(YEAR)) { |
| 714 | min = getActualMinimum(WEEK_OF_YEAR); |
| 715 | max = getActualMaximum(WEEK_OF_YEAR); |
| 716 | if (value > min && value < max) { |
| 717 | set(WEEK_OF_YEAR, value); |
| 718 | return; |
| 719 | } |
| 720 | |
| 721 | } |
| 722 | // If the new value is in between min and max |
| 723 | // (exclusive), then we can use the value. |
| 724 | if (value > min && value < max) { |
| 725 | set(WEEK_OF_YEAR, value); |
| 726 | return; |
| 727 | } |
| 728 | long fd = cachedFixedDate; |
| 729 | // Make sure that the min week has the current DAY_OF_WEEK |
| 730 | long day1 = fd - (7 * (woy - min)); |
| 731 | if (year != getMinimum(YEAR)) { |
| 732 | if (gcal.getYearFromFixedDate(day1) != y) { |
| 733 | min++; |
| 734 | } |
| 735 | } else { |
| 736 | CalendarDate d = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 737 | if (day1 < jcal.getFixedDate(d)) { |
| 738 | min++; |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | // Make sure the same thing for the max week |
| 743 | fd += 7 * (max - internalGet(WEEK_OF_YEAR)); |
| 744 | if (gcal.getYearFromFixedDate(fd) != y) { |
| 745 | max--; |
| 746 | } |
| 747 | break; |
| 748 | } |
| 749 | |
| 750 | // Handle transition here. |
| 751 | long fd = cachedFixedDate; |
| 752 | long day1 = fd - (7 * (woy - min)); |
| 753 | // Make sure that the min week has the current DAY_OF_WEEK |
| 754 | LocalGregorianCalendar.Date d = getCalendarDate(day1); |
| 755 | if (!(d.getEra() == jdate.getEra() && d.getYear() == jdate.getYear())) { |
| 756 | min++; |
| 757 | } |
| 758 | |
| 759 | // Make sure the same thing for the max week |
| 760 | fd += 7 * (max - woy); |
| 761 | jcal.getCalendarDateFromFixedDate(d, fd); |
| 762 | if (!(d.getEra() == jdate.getEra() && d.getYear() == jdate.getYear())) { |
| 763 | max--; |
| 764 | } |
| 765 | // value: the new WEEK_OF_YEAR which must be converted |
| 766 | // to month and day of month. |
| 767 | value = getRolledValue(woy, amount, min, max) - 1; |
| 768 | d = getCalendarDate(day1 + value * 7); |
| 769 | set(MONTH, d.getMonth() - 1); |
| 770 | set(DAY_OF_MONTH, d.getDayOfMonth()); |
| 771 | return; |
| 772 | } |
| 773 | |
| 774 | case WEEK_OF_MONTH: |
| 775 | { |
| 776 | boolean isTransitionYear = isTransitionYear(jdate.getNormalizedYear()); |
| 777 | // dow: relative day of week from the first day of week |
| 778 | int dow = internalGet(DAY_OF_WEEK) - getFirstDayOfWeek(); |
| 779 | if (dow < 0) { |
| 780 | dow += 7; |
| 781 | } |
| 782 | |
| 783 | long fd = cachedFixedDate; |
| 784 | long month1; // fixed date of the first day (usually 1) of the month |
| 785 | int monthLength; // actual month length |
| 786 | if (isTransitionYear) { |
| 787 | month1 = getFixedDateMonth1(jdate, fd); |
| 788 | monthLength = actualMonthLength(); |
| 789 | } else { |
| 790 | month1 = fd - internalGet(DAY_OF_MONTH) + 1; |
| 791 | monthLength = jcal.getMonthLength(jdate); |
| 792 | } |
| 793 | |
| 794 | // the first day of week of the month. |
| 795 | long monthDay1st = jcal.getDayOfWeekDateOnOrBefore(month1 + 6, |
| 796 | getFirstDayOfWeek()); |
| 797 | // if the week has enough days to form a week, the |
| 798 | // week starts from the previous month. |
| 799 | if ((int)(monthDay1st - month1) >= getMinimalDaysInFirstWeek()) { |
| 800 | monthDay1st -= 7; |
| 801 | } |
| 802 | max = getActualMaximum(field); |
| 803 | |
| 804 | // value: the new WEEK_OF_MONTH value |
| 805 | int value = getRolledValue(internalGet(field), amount, 1, max) - 1; |
| 806 | |
| 807 | // nfd: fixed date of the rolled date |
| 808 | long nfd = monthDay1st + value * 7 + dow; |
| 809 | |
| 810 | // Unlike WEEK_OF_YEAR, we need to change day of week if the |
| 811 | // nfd is out of the month. |
| 812 | if (nfd < month1) { |
| 813 | nfd = month1; |
| 814 | } else if (nfd >= (month1 + monthLength)) { |
| 815 | nfd = month1 + monthLength - 1; |
| 816 | } |
| 817 | set(DAY_OF_MONTH, (int)(nfd - month1) + 1); |
| 818 | return; |
| 819 | } |
| 820 | |
| 821 | case DAY_OF_MONTH: |
| 822 | { |
| 823 | if (!isTransitionYear(jdate.getNormalizedYear())) { |
| 824 | max = jcal.getMonthLength(jdate); |
| 825 | break; |
| 826 | } |
| 827 | |
| 828 | // TODO: Need to change the spec to be usable DAY_OF_MONTH rolling... |
| 829 | |
| 830 | // Transition handling. We can't change year and era |
| 831 | // values here due to the Calendar roll spec! |
| 832 | long month1 = getFixedDateMonth1(jdate, cachedFixedDate); |
| 833 | |
| 834 | // It may not be a regular month. Convert the date and range to |
| 835 | // the relative values, perform the roll, and |
| 836 | // convert the result back to the rolled date. |
| 837 | int value = getRolledValue((int)(cachedFixedDate - month1), amount, |
| 838 | 0, actualMonthLength() - 1); |
| 839 | LocalGregorianCalendar.Date d = getCalendarDate(month1 + value); |
| 840 | assert getEraIndex(d) == internalGetEra() |
| 841 | && d.getYear() == internalGet(YEAR) && d.getMonth()-1 == internalGet(MONTH); |
| 842 | set(DAY_OF_MONTH, d.getDayOfMonth()); |
| 843 | return; |
| 844 | } |
| 845 | |
| 846 | case DAY_OF_YEAR: |
| 847 | { |
| 848 | max = getActualMaximum(field); |
| 849 | if (!isTransitionYear(jdate.getNormalizedYear())) { |
| 850 | break; |
| 851 | } |
| 852 | |
| 853 | // Handle transition. We can't change year and era values |
| 854 | // here due to the Calendar roll spec. |
| 855 | int value = getRolledValue(internalGet(DAY_OF_YEAR), amount, min, max); |
| 856 | long jan0 = cachedFixedDate - internalGet(DAY_OF_YEAR); |
| 857 | LocalGregorianCalendar.Date d = getCalendarDate(jan0 + value); |
| 858 | assert getEraIndex(d) == internalGetEra() && d.getYear() == internalGet(YEAR); |
| 859 | set(MONTH, d.getMonth() - 1); |
| 860 | set(DAY_OF_MONTH, d.getDayOfMonth()); |
| 861 | return; |
| 862 | } |
| 863 | |
| 864 | case DAY_OF_WEEK: |
| 865 | { |
| 866 | int normalizedYear = jdate.getNormalizedYear(); |
| 867 | if (!isTransitionYear(normalizedYear) && !isTransitionYear(normalizedYear - 1)) { |
| 868 | // If the week of year is in the same year, we can |
| 869 | // just change DAY_OF_WEEK. |
| 870 | int weekOfYear = internalGet(WEEK_OF_YEAR); |
| 871 | if (weekOfYear > 1 && weekOfYear < 52) { |
| 872 | set(WEEK_OF_YEAR, internalGet(WEEK_OF_YEAR)); |
| 873 | max = SATURDAY; |
| 874 | break; |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | // We need to handle it in a different way around year |
| 879 | // boundaries and in the transition year. Note that |
| 880 | // changing era and year values violates the roll |
| 881 | // rule: not changing larger calendar fields... |
| 882 | amount %= 7; |
| 883 | if (amount == 0) { |
| 884 | return; |
| 885 | } |
| 886 | long fd = cachedFixedDate; |
| 887 | long dowFirst = jcal.getDayOfWeekDateOnOrBefore(fd, getFirstDayOfWeek()); |
| 888 | fd += amount; |
| 889 | if (fd < dowFirst) { |
| 890 | fd += 7; |
| 891 | } else if (fd >= dowFirst + 7) { |
| 892 | fd -= 7; |
| 893 | } |
| 894 | LocalGregorianCalendar.Date d = getCalendarDate(fd); |
| 895 | set(ERA, getEraIndex(d)); |
| 896 | set(d.getYear(), d.getMonth() - 1, d.getDayOfMonth()); |
| 897 | return; |
| 898 | } |
| 899 | |
| 900 | case DAY_OF_WEEK_IN_MONTH: |
| 901 | { |
| 902 | min = 1; // after having normalized, min should be 1. |
| 903 | if (!isTransitionYear(jdate.getNormalizedYear())) { |
| 904 | int dom = internalGet(DAY_OF_MONTH); |
| 905 | int monthLength = jcal.getMonthLength(jdate); |
| 906 | int lastDays = monthLength % 7; |
| 907 | max = monthLength / 7; |
| 908 | int x = (dom - 1) % 7; |
| 909 | if (x < lastDays) { |
| 910 | max++; |
| 911 | } |
| 912 | set(DAY_OF_WEEK, internalGet(DAY_OF_WEEK)); |
| 913 | break; |
| 914 | } |
| 915 | |
| 916 | // Transition year handling. |
| 917 | long fd = cachedFixedDate; |
| 918 | long month1 = getFixedDateMonth1(jdate, fd); |
| 919 | int monthLength = actualMonthLength(); |
| 920 | int lastDays = monthLength % 7; |
| 921 | max = monthLength / 7; |
| 922 | int x = (int)(fd - month1) % 7; |
| 923 | if (x < lastDays) { |
| 924 | max++; |
| 925 | } |
| 926 | int value = getRolledValue(internalGet(field), amount, min, max) - 1; |
| 927 | fd = month1 + value * 7 + x; |
| 928 | LocalGregorianCalendar.Date d = getCalendarDate(fd); |
| 929 | set(DAY_OF_MONTH, d.getDayOfMonth()); |
| 930 | return; |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | set(field, getRolledValue(internalGet(field), amount, min, max)); |
| 935 | } |
| 936 | |
| 937 | public String getDisplayName(int field, int style, Locale locale) { |
| 938 | if (!checkDisplayNameParams(field, style, SHORT, LONG, locale, |
| 939 | ERA_MASK|YEAR_MASK|MONTH_MASK|DAY_OF_WEEK_MASK|AM_PM_MASK)) { |
| 940 | return null; |
| 941 | } |
| 942 | |
| 943 | // "GanNen" is supported only in the LONG style. |
| 944 | if (field == YEAR |
| 945 | && (style == SHORT || get(YEAR) != 1 || get(ERA) == 0)) { |
| 946 | return null; |
| 947 | } |
| 948 | |
| 949 | ResourceBundle rb = LocaleData.getDateFormatData(locale); |
| 950 | String name = null; |
| 951 | String key = getKey(field, style); |
| 952 | if (key != null) { |
| 953 | String[] strings = rb.getStringArray(key); |
| 954 | if (field == YEAR) { |
| 955 | if (strings.length > 0) { |
| 956 | name = strings[0]; |
| 957 | } |
| 958 | } else { |
| 959 | int index = get(field); |
| 960 | // If the ERA value is out of range for strings, then |
| 961 | // try to get its name or abbreviation from the Era instance. |
| 962 | if (field == ERA && index >= strings.length && index < eras.length) { |
| 963 | Era era = eras[index]; |
| 964 | name = (style == SHORT) ? era.getAbbreviation() : era.getName(); |
| 965 | } else { |
| 966 | if (field == DAY_OF_WEEK) |
| 967 | --index; |
| 968 | name = strings[index]; |
| 969 | } |
| 970 | } |
| 971 | } |
| 972 | return name; |
| 973 | } |
| 974 | |
| 975 | public Map<String,Integer> getDisplayNames(int field, int style, Locale locale) { |
| 976 | if (!checkDisplayNameParams(field, style, ALL_STYLES, LONG, locale, |
| 977 | ERA_MASK|YEAR_MASK|MONTH_MASK|DAY_OF_WEEK_MASK|AM_PM_MASK)) { |
| 978 | return null; |
| 979 | } |
| 980 | |
| 981 | if (style == ALL_STYLES) { |
| 982 | Map<String,Integer> shortNames = getDisplayNamesImpl(field, SHORT, locale); |
| 983 | if (field == AM_PM) { |
| 984 | return shortNames; |
| 985 | } |
| 986 | Map<String,Integer> longNames = getDisplayNamesImpl(field, LONG, locale); |
| 987 | if (shortNames == null) { |
| 988 | return longNames; |
| 989 | } |
| 990 | if (longNames != null) { |
| 991 | shortNames.putAll(longNames); |
| 992 | } |
| 993 | return shortNames; |
| 994 | } |
| 995 | |
| 996 | // SHORT or LONG |
| 997 | return getDisplayNamesImpl(field, style, locale); |
| 998 | } |
| 999 | |
| 1000 | private Map<String,Integer> getDisplayNamesImpl(int field, int style, Locale locale) { |
| 1001 | ResourceBundle rb = LocaleData.getDateFormatData(locale); |
| 1002 | String key = getKey(field, style); |
| 1003 | Map<String,Integer> map = new HashMap<String,Integer>(); |
| 1004 | if (key != null) { |
| 1005 | String[] strings = rb.getStringArray(key); |
| 1006 | if (field == YEAR) { |
| 1007 | if (strings.length > 0) { |
| 1008 | map.put(strings[0], 1); |
| 1009 | } |
| 1010 | } else { |
| 1011 | int base = (field == DAY_OF_WEEK) ? 1 : 0; |
| 1012 | for (int i = 0; i < strings.length; i++) { |
| 1013 | map.put(strings[i], base + i); |
| 1014 | } |
| 1015 | // If strings[] has fewer than eras[], get more names from eras[]. |
| 1016 | if (field == ERA && strings.length < eras.length) { |
| 1017 | for (int i = strings.length; i < eras.length; i++) { |
| 1018 | Era era = eras[i]; |
| 1019 | String name = (style == SHORT) ? era.getAbbreviation() : era.getName(); |
| 1020 | map.put(name, i); |
| 1021 | } |
| 1022 | } |
| 1023 | } |
| 1024 | } |
| 1025 | return map.size() > 0 ? map : null; |
| 1026 | } |
| 1027 | |
| 1028 | private String getKey(int field, int style) { |
| 1029 | String className = JapaneseImperialCalendar.class.getName(); |
| 1030 | StringBuilder key = new StringBuilder(); |
| 1031 | switch (field) { |
| 1032 | case ERA: |
| 1033 | key.append(className); |
| 1034 | if (style == SHORT) { |
| 1035 | key.append(".short"); |
| 1036 | } |
| 1037 | key.append(".Eras"); |
| 1038 | break; |
| 1039 | |
| 1040 | case YEAR: |
| 1041 | key.append(className).append(".FirstYear"); |
| 1042 | break; |
| 1043 | |
| 1044 | case MONTH: |
| 1045 | key.append(style == SHORT ? "MonthAbbreviations" : "MonthNames"); |
| 1046 | break; |
| 1047 | |
| 1048 | case DAY_OF_WEEK: |
| 1049 | key.append(style == SHORT ? "DayAbbreviations" : "DayNames"); |
| 1050 | break; |
| 1051 | |
| 1052 | case AM_PM: |
| 1053 | key.append("AmPmMarkers"); |
| 1054 | break; |
| 1055 | } |
| 1056 | return key.length() > 0 ? key.toString() : null; |
| 1057 | } |
| 1058 | |
| 1059 | /** |
| 1060 | * Returns the minimum value for the given calendar field of this |
| 1061 | * <code>Calendar</code> instance. The minimum value is |
| 1062 | * defined as the smallest value returned by the {@link |
| 1063 | * Calendar#get(int) get} method for any possible time value, |
| 1064 | * taking into consideration the current values of the |
| 1065 | * {@link Calendar#getFirstDayOfWeek() getFirstDayOfWeek}, |
| 1066 | * {@link Calendar#getMinimalDaysInFirstWeek() getMinimalDaysInFirstWeek}, |
| 1067 | * and {@link Calendar#getTimeZone() getTimeZone} methods. |
| 1068 | * |
| 1069 | * @param field the calendar field. |
| 1070 | * @return the minimum value for the given calendar field. |
| 1071 | * @see #getMaximum(int) |
| 1072 | * @see #getGreatestMinimum(int) |
| 1073 | * @see #getLeastMaximum(int) |
| 1074 | * @see #getActualMinimum(int) |
| 1075 | * @see #getActualMaximum(int) |
| 1076 | */ |
| 1077 | public int getMinimum(int field) { |
| 1078 | return MIN_VALUES[field]; |
| 1079 | } |
| 1080 | |
| 1081 | /** |
| 1082 | * Returns the maximum value for the given calendar field of this |
| 1083 | * <code>GregorianCalendar</code> instance. The maximum value is |
| 1084 | * defined as the largest value returned by the {@link |
| 1085 | * Calendar#get(int) get} method for any possible time value, |
| 1086 | * taking into consideration the current values of the |
| 1087 | * {@link Calendar#getFirstDayOfWeek() getFirstDayOfWeek}, |
| 1088 | * {@link Calendar#getMinimalDaysInFirstWeek() getMinimalDaysInFirstWeek}, |
| 1089 | * and {@link Calendar#getTimeZone() getTimeZone} methods. |
| 1090 | * |
| 1091 | * @param field the calendar field. |
| 1092 | * @return the maximum value for the given calendar field. |
| 1093 | * @see #getMinimum(int) |
| 1094 | * @see #getGreatestMinimum(int) |
| 1095 | * @see #getLeastMaximum(int) |
| 1096 | * @see #getActualMinimum(int) |
| 1097 | * @see #getActualMaximum(int) |
| 1098 | */ |
| 1099 | public int getMaximum(int field) { |
| 1100 | switch (field) { |
| 1101 | case YEAR: |
| 1102 | { |
| 1103 | // The value should depend on the time zone of this calendar. |
| 1104 | LocalGregorianCalendar.Date d = jcal.getCalendarDate(Long.MAX_VALUE, |
| 1105 | getZone()); |
| 1106 | return Math.max(LEAST_MAX_VALUES[YEAR], d.getYear()); |
| 1107 | } |
| 1108 | } |
| 1109 | return MAX_VALUES[field]; |
| 1110 | } |
| 1111 | |
| 1112 | /** |
| 1113 | * Returns the highest minimum value for the given calendar field |
| 1114 | * of this <code>GregorianCalendar</code> instance. The highest |
| 1115 | * minimum value is defined as the largest value returned by |
| 1116 | * {@link #getActualMinimum(int)} for any possible time value, |
| 1117 | * taking into consideration the current values of the |
| 1118 | * {@link Calendar#getFirstDayOfWeek() getFirstDayOfWeek}, |
| 1119 | * {@link Calendar#getMinimalDaysInFirstWeek() getMinimalDaysInFirstWeek}, |
| 1120 | * and {@link Calendar#getTimeZone() getTimeZone} methods. |
| 1121 | * |
| 1122 | * @param field the calendar field. |
| 1123 | * @return the highest minimum value for the given calendar field. |
| 1124 | * @see #getMinimum(int) |
| 1125 | * @see #getMaximum(int) |
| 1126 | * @see #getLeastMaximum(int) |
| 1127 | * @see #getActualMinimum(int) |
| 1128 | * @see #getActualMaximum(int) |
| 1129 | */ |
| 1130 | public int getGreatestMinimum(int field) { |
| 1131 | return field == YEAR ? 1 : MIN_VALUES[field]; |
| 1132 | } |
| 1133 | |
| 1134 | /** |
| 1135 | * Returns the lowest maximum value for the given calendar field |
| 1136 | * of this <code>GregorianCalendar</code> instance. The lowest |
| 1137 | * maximum value is defined as the smallest value returned by |
| 1138 | * {@link #getActualMaximum(int)} for any possible time value, |
| 1139 | * taking into consideration the current values of the |
| 1140 | * {@link Calendar#getFirstDayOfWeek() getFirstDayOfWeek}, |
| 1141 | * {@link Calendar#getMinimalDaysInFirstWeek() getMinimalDaysInFirstWeek}, |
| 1142 | * and {@link Calendar#getTimeZone() getTimeZone} methods. |
| 1143 | * |
| 1144 | * @param field the calendar field |
| 1145 | * @return the lowest maximum value for the given calendar field. |
| 1146 | * @see #getMinimum(int) |
| 1147 | * @see #getMaximum(int) |
| 1148 | * @see #getGreatestMinimum(int) |
| 1149 | * @see #getActualMinimum(int) |
| 1150 | * @see #getActualMaximum(int) |
| 1151 | */ |
| 1152 | public int getLeastMaximum(int field) { |
| 1153 | switch (field) { |
| 1154 | case YEAR: |
| 1155 | { |
| 1156 | return Math.min(LEAST_MAX_VALUES[YEAR], getMaximum(YEAR)); |
| 1157 | } |
| 1158 | } |
| 1159 | return LEAST_MAX_VALUES[field]; |
| 1160 | } |
| 1161 | |
| 1162 | /** |
| 1163 | * Returns the minimum value that this calendar field could have, |
| 1164 | * taking into consideration the given time value and the current |
| 1165 | * values of the |
| 1166 | * {@link Calendar#getFirstDayOfWeek() getFirstDayOfWeek}, |
| 1167 | * {@link Calendar#getMinimalDaysInFirstWeek() getMinimalDaysInFirstWeek}, |
| 1168 | * and {@link Calendar#getTimeZone() getTimeZone} methods. |
| 1169 | * |
| 1170 | * @param field the calendar field |
| 1171 | * @return the minimum of the given field for the time value of |
| 1172 | * this <code>JapaneseImperialCalendar</code> |
| 1173 | * @see #getMinimum(int) |
| 1174 | * @see #getMaximum(int) |
| 1175 | * @see #getGreatestMinimum(int) |
| 1176 | * @see #getLeastMaximum(int) |
| 1177 | * @see #getActualMaximum(int) |
| 1178 | */ |
| 1179 | public int getActualMinimum(int field) { |
| 1180 | if (!isFieldSet(YEAR_MASK|MONTH_MASK|WEEK_OF_YEAR_MASK, field)) { |
| 1181 | return getMinimum(field); |
| 1182 | } |
| 1183 | |
| 1184 | int value = 0; |
| 1185 | JapaneseImperialCalendar jc = getNormalizedCalendar(); |
| 1186 | // Get a local date which includes time of day and time zone, |
| 1187 | // which are missing in jc.jdate. |
| 1188 | LocalGregorianCalendar.Date jd = jcal.getCalendarDate(jc.getTimeInMillis(), |
| 1189 | getZone()); |
| 1190 | int eraIndex = getEraIndex(jd); |
| 1191 | switch (field) { |
| 1192 | case YEAR: |
| 1193 | { |
| 1194 | if (eraIndex > BEFORE_MEIJI) { |
| 1195 | value = 1; |
| 1196 | long since = eras[eraIndex].getSince(getZone()); |
| 1197 | CalendarDate d = jcal.getCalendarDate(since, getZone()); |
| 1198 | // Use the same year in jd to take care of leap |
| 1199 | // years. i.e., both jd and d must agree on leap |
| 1200 | // or common years. |
| 1201 | jd.setYear(d.getYear()); |
| 1202 | jcal.normalize(jd); |
| 1203 | assert jd.isLeapYear() == d.isLeapYear(); |
| 1204 | if (getYearOffsetInMillis(jd) < getYearOffsetInMillis(d)) { |
| 1205 | value++; |
| 1206 | } |
| 1207 | } else { |
| 1208 | value = getMinimum(field); |
| 1209 | CalendarDate d = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 1210 | // Use an equvalent year of d.getYear() if |
| 1211 | // possible. Otherwise, ignore the leap year and |
| 1212 | // common year difference. |
| 1213 | int y = d.getYear(); |
| 1214 | if (y > 400) { |
| 1215 | y -= 400; |
| 1216 | } |
| 1217 | jd.setYear(y); |
| 1218 | jcal.normalize(jd); |
| 1219 | if (getYearOffsetInMillis(jd) < getYearOffsetInMillis(d)) { |
| 1220 | value++; |
| 1221 | } |
| 1222 | } |
| 1223 | } |
| 1224 | break; |
| 1225 | |
| 1226 | case MONTH: |
| 1227 | { |
| 1228 | // In Before Meiji and Meiji, January is the first month. |
| 1229 | if (eraIndex > MEIJI && jd.getYear() == 1) { |
| 1230 | long since = eras[eraIndex].getSince(getZone()); |
| 1231 | CalendarDate d = jcal.getCalendarDate(since, getZone()); |
| 1232 | value = d.getMonth() - 1; |
| 1233 | if (jd.getDayOfMonth() < d.getDayOfMonth()) { |
| 1234 | value++; |
| 1235 | } |
| 1236 | } |
| 1237 | } |
| 1238 | break; |
| 1239 | |
| 1240 | case WEEK_OF_YEAR: |
| 1241 | { |
| 1242 | value = 1; |
| 1243 | CalendarDate d = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 1244 | // shift 400 years to avoid underflow |
| 1245 | d.addYear(+400); |
| 1246 | jcal.normalize(d); |
| 1247 | jd.setEra(d.getEra()); |
| 1248 | jd.setYear(d.getYear()); |
| 1249 | jcal.normalize(jd); |
| 1250 | |
| 1251 | long jan1 = jcal.getFixedDate(d); |
| 1252 | long fd = jcal.getFixedDate(jd); |
| 1253 | int woy = getWeekNumber(jan1, fd); |
| 1254 | long day1 = fd - (7 * (woy - 1)); |
| 1255 | if ((day1 < jan1) || |
| 1256 | (day1 == jan1 && |
| 1257 | jd.getTimeOfDay() < d.getTimeOfDay())) { |
| 1258 | value++; |
| 1259 | } |
| 1260 | } |
| 1261 | break; |
| 1262 | } |
| 1263 | return value; |
| 1264 | } |
| 1265 | |
| 1266 | /** |
| 1267 | * Returns the maximum value that this calendar field could have, |
| 1268 | * taking into consideration the given time value and the current |
| 1269 | * values of the |
| 1270 | * {@link Calendar#getFirstDayOfWeek() getFirstDayOfWeek}, |
| 1271 | * {@link Calendar#getMinimalDaysInFirstWeek() getMinimalDaysInFirstWeek}, |
| 1272 | * and |
| 1273 | * {@link Calendar#getTimeZone() getTimeZone} methods. |
| 1274 | * For example, if the date of this instance is Heisei 16February 1, |
| 1275 | * the actual maximum value of the <code>DAY_OF_MONTH</code> field |
| 1276 | * is 29 because Heisei 16 is a leap year, and if the date of this |
| 1277 | * instance is Heisei 17 February 1, it's 28. |
| 1278 | * |
| 1279 | * @param field the calendar field |
| 1280 | * @return the maximum of the given field for the time value of |
| 1281 | * this <code>JapaneseImperialCalendar</code> |
| 1282 | * @see #getMinimum(int) |
| 1283 | * @see #getMaximum(int) |
| 1284 | * @see #getGreatestMinimum(int) |
| 1285 | * @see #getLeastMaximum(int) |
| 1286 | * @see #getActualMinimum(int) |
| 1287 | */ |
| 1288 | public int getActualMaximum(int field) { |
| 1289 | final int fieldsForFixedMax = ERA_MASK|DAY_OF_WEEK_MASK|HOUR_MASK|AM_PM_MASK| |
| 1290 | HOUR_OF_DAY_MASK|MINUTE_MASK|SECOND_MASK|MILLISECOND_MASK| |
| 1291 | ZONE_OFFSET_MASK|DST_OFFSET_MASK; |
| 1292 | if ((fieldsForFixedMax & (1<<field)) != 0) { |
| 1293 | return getMaximum(field); |
| 1294 | } |
| 1295 | |
| 1296 | JapaneseImperialCalendar jc = getNormalizedCalendar(); |
| 1297 | LocalGregorianCalendar.Date date = jc.jdate; |
| 1298 | int normalizedYear = date.getNormalizedYear(); |
| 1299 | |
| 1300 | int value = -1; |
| 1301 | switch (field) { |
| 1302 | case MONTH: |
| 1303 | { |
| 1304 | value = DECEMBER; |
| 1305 | if (isTransitionYear(date.getNormalizedYear())) { |
| 1306 | // TODO: there may be multiple transitions in a year. |
| 1307 | int eraIndex = getEraIndex(date); |
| 1308 | if (date.getYear() != 1) { |
| 1309 | eraIndex++; |
| 1310 | assert eraIndex < eras.length; |
| 1311 | } |
| 1312 | long transition = sinceFixedDates[eraIndex]; |
| 1313 | long fd = jc.cachedFixedDate; |
| 1314 | if (fd < transition) { |
| 1315 | LocalGregorianCalendar.Date ldate |
| 1316 | = (LocalGregorianCalendar.Date) date.clone(); |
| 1317 | jcal.getCalendarDateFromFixedDate(ldate, transition - 1); |
| 1318 | value = ldate.getMonth() - 1; |
| 1319 | } |
| 1320 | } else { |
| 1321 | LocalGregorianCalendar.Date d = jcal.getCalendarDate(Long.MAX_VALUE, |
| 1322 | getZone()); |
| 1323 | if (date.getEra() == d.getEra() && date.getYear() == d.getYear()) { |
| 1324 | value = d.getMonth() - 1; |
| 1325 | } |
| 1326 | } |
| 1327 | } |
| 1328 | break; |
| 1329 | |
| 1330 | case DAY_OF_MONTH: |
| 1331 | value = jcal.getMonthLength(date); |
| 1332 | break; |
| 1333 | |
| 1334 | case DAY_OF_YEAR: |
| 1335 | { |
| 1336 | if (isTransitionYear(date.getNormalizedYear())) { |
| 1337 | // Handle transition year. |
| 1338 | // TODO: there may be multiple transitions in a year. |
| 1339 | int eraIndex = getEraIndex(date); |
| 1340 | if (date.getYear() != 1) { |
| 1341 | eraIndex++; |
| 1342 | assert eraIndex < eras.length; |
| 1343 | } |
| 1344 | long transition = sinceFixedDates[eraIndex]; |
| 1345 | long fd = jc.cachedFixedDate; |
| 1346 | CalendarDate d = gcal.newCalendarDate(TimeZone.NO_TIMEZONE); |
| 1347 | d.setDate(date.getNormalizedYear(), BaseCalendar.JANUARY, 1); |
| 1348 | if (fd < transition) { |
| 1349 | value = (int)(transition - gcal.getFixedDate(d)); |
| 1350 | } else { |
| 1351 | d.addYear(+1); |
| 1352 | value = (int)(gcal.getFixedDate(d) - transition); |
| 1353 | } |
| 1354 | } else { |
| 1355 | LocalGregorianCalendar.Date d = jcal.getCalendarDate(Long.MAX_VALUE, |
| 1356 | getZone()); |
| 1357 | if (date.getEra() == d.getEra() && date.getYear() == d.getYear()) { |
| 1358 | long fd = jcal.getFixedDate(d); |
| 1359 | long jan1 = getFixedDateJan1(d, fd); |
| 1360 | value = (int)(fd - jan1) + 1; |
| 1361 | } else if (date.getYear() == getMinimum(YEAR)) { |
| 1362 | CalendarDate d1 = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 1363 | long fd1 = jcal.getFixedDate(d1); |
| 1364 | d1.addYear(1); |
| 1365 | d1.setMonth(BaseCalendar.JANUARY).setDayOfMonth(1); |
| 1366 | jcal.normalize(d1); |
| 1367 | long fd2 = jcal.getFixedDate(d1); |
| 1368 | value = (int)(fd2 - fd1); |
| 1369 | } else { |
| 1370 | value = jcal.getYearLength(date); |
| 1371 | } |
| 1372 | } |
| 1373 | } |
| 1374 | break; |
| 1375 | |
| 1376 | case WEEK_OF_YEAR: |
| 1377 | { |
| 1378 | if (!isTransitionYear(date.getNormalizedYear())) { |
| 1379 | LocalGregorianCalendar.Date jd = jcal.getCalendarDate(Long.MAX_VALUE, |
| 1380 | getZone()); |
| 1381 | if (date.getEra() == jd.getEra() && date.getYear() == jd.getYear()) { |
| 1382 | long fd = jcal.getFixedDate(jd); |
| 1383 | long jan1 = getFixedDateJan1(jd, fd); |
| 1384 | value = getWeekNumber(jan1, fd); |
| 1385 | } else if (date.getEra() == null && date.getYear() == getMinimum(YEAR)) { |
| 1386 | CalendarDate d = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 1387 | // shift 400 years to avoid underflow |
| 1388 | d.addYear(+400); |
| 1389 | jcal.normalize(d); |
| 1390 | jd.setEra(d.getEra()); |
| 1391 | jd.setDate(d.getYear() + 1, BaseCalendar.JANUARY, 1); |
| 1392 | jcal.normalize(jd); |
| 1393 | long jan1 = jcal.getFixedDate(d); |
| 1394 | long nextJan1 = jcal.getFixedDate(jd); |
| 1395 | long nextJan1st = jcal.getDayOfWeekDateOnOrBefore(nextJan1 + 6, |
| 1396 | getFirstDayOfWeek()); |
| 1397 | int ndays = (int)(nextJan1st - nextJan1); |
| 1398 | if (ndays >= getMinimalDaysInFirstWeek()) { |
| 1399 | nextJan1st -= 7; |
| 1400 | } |
| 1401 | value = getWeekNumber(jan1, nextJan1st); |
| 1402 | } else { |
| 1403 | // Get the day of week of January 1 of the year |
| 1404 | CalendarDate d = gcal.newCalendarDate(TimeZone.NO_TIMEZONE); |
| 1405 | d.setDate(date.getNormalizedYear(), BaseCalendar.JANUARY, 1); |
| 1406 | int dayOfWeek = gcal.getDayOfWeek(d); |
| 1407 | // Normalize the day of week with the firstDayOfWeek value |
| 1408 | dayOfWeek -= getFirstDayOfWeek(); |
| 1409 | if (dayOfWeek < 0) { |
| 1410 | dayOfWeek += 7; |
| 1411 | } |
| 1412 | value = 52; |
| 1413 | int magic = dayOfWeek + getMinimalDaysInFirstWeek() - 1; |
| 1414 | if ((magic == 6) || |
| 1415 | (date.isLeapYear() && (magic == 5 || magic == 12))) { |
| 1416 | value++; |
| 1417 | } |
| 1418 | } |
| 1419 | break; |
| 1420 | } |
| 1421 | |
| 1422 | if (jc == this) { |
| 1423 | jc = (JapaneseImperialCalendar) jc.clone(); |
| 1424 | } |
| 1425 | int max = getActualMaximum(DAY_OF_YEAR); |
| 1426 | jc.set(DAY_OF_YEAR, max); |
| 1427 | value = jc.get(WEEK_OF_YEAR); |
| 1428 | if (value == 1 && max > 7) { |
| 1429 | jc.add(WEEK_OF_YEAR, -1); |
| 1430 | value = jc.get(WEEK_OF_YEAR); |
| 1431 | } |
| 1432 | } |
| 1433 | break; |
| 1434 | |
| 1435 | case WEEK_OF_MONTH: |
| 1436 | { |
| 1437 | LocalGregorianCalendar.Date jd = jcal.getCalendarDate(Long.MAX_VALUE, |
| 1438 | getZone()); |
| 1439 | if (!(date.getEra() == jd.getEra() && date.getYear() == jd.getYear())) { |
| 1440 | CalendarDate d = gcal.newCalendarDate(TimeZone.NO_TIMEZONE); |
| 1441 | d.setDate(date.getNormalizedYear(), date.getMonth(), 1); |
| 1442 | int dayOfWeek = gcal.getDayOfWeek(d); |
| 1443 | int monthLength = gcal.getMonthLength(d); |
| 1444 | dayOfWeek -= getFirstDayOfWeek(); |
| 1445 | if (dayOfWeek < 0) { |
| 1446 | dayOfWeek += 7; |
| 1447 | } |
| 1448 | int nDaysFirstWeek = 7 - dayOfWeek; // # of days in the first week |
| 1449 | value = 3; |
| 1450 | if (nDaysFirstWeek >= getMinimalDaysInFirstWeek()) { |
| 1451 | value++; |
| 1452 | } |
| 1453 | monthLength -= nDaysFirstWeek + 7 * 3; |
| 1454 | if (monthLength > 0) { |
| 1455 | value++; |
| 1456 | if (monthLength > 7) { |
| 1457 | value++; |
| 1458 | } |
| 1459 | } |
| 1460 | } else { |
| 1461 | long fd = jcal.getFixedDate(jd); |
| 1462 | long month1 = fd - jd.getDayOfMonth() + 1; |
| 1463 | value = getWeekNumber(month1, fd); |
| 1464 | } |
| 1465 | } |
| 1466 | break; |
| 1467 | |
| 1468 | case DAY_OF_WEEK_IN_MONTH: |
| 1469 | { |
| 1470 | int ndays, dow1; |
| 1471 | int dow = date.getDayOfWeek(); |
| 1472 | BaseCalendar.Date d = (BaseCalendar.Date) date.clone(); |
| 1473 | ndays = jcal.getMonthLength(d); |
| 1474 | d.setDayOfMonth(1); |
| 1475 | jcal.normalize(d); |
| 1476 | dow1 = d.getDayOfWeek(); |
| 1477 | int x = dow - dow1; |
| 1478 | if (x < 0) { |
| 1479 | x += 7; |
| 1480 | } |
| 1481 | ndays -= x; |
| 1482 | value = (ndays + 6) / 7; |
| 1483 | } |
| 1484 | break; |
| 1485 | |
| 1486 | case YEAR: |
| 1487 | { |
| 1488 | CalendarDate jd = jcal.getCalendarDate(jc.getTimeInMillis(), getZone()); |
| 1489 | CalendarDate d; |
| 1490 | int eraIndex = getEraIndex(date); |
| 1491 | if (eraIndex == eras.length - 1) { |
| 1492 | d = jcal.getCalendarDate(Long.MAX_VALUE, getZone()); |
| 1493 | value = d.getYear(); |
| 1494 | // Use an equivalent year for the |
| 1495 | // getYearOffsetInMillis call to avoid overflow. |
| 1496 | if (value > 400) { |
| 1497 | jd.setYear(value - 400); |
| 1498 | } |
| 1499 | } else { |
| 1500 | d = jcal.getCalendarDate(eras[eraIndex + 1].getSince(getZone()) - 1, |
| 1501 | getZone()); |
| 1502 | value = d.getYear(); |
| 1503 | // Use the same year as d.getYear() to be |
| 1504 | // consistent with leap and common years. |
| 1505 | jd.setYear(value); |
| 1506 | } |
| 1507 | jcal.normalize(jd); |
| 1508 | if (getYearOffsetInMillis(jd) > getYearOffsetInMillis(d)) { |
| 1509 | value--; |
| 1510 | } |
| 1511 | } |
| 1512 | break; |
| 1513 | |
| 1514 | default: |
| 1515 | throw new ArrayIndexOutOfBoundsException(field); |
| 1516 | } |
| 1517 | return value; |
| 1518 | } |
| 1519 | |
| 1520 | /** |
| 1521 | * Returns the millisecond offset from the beginning of the |
| 1522 | * year. In the year for Long.MIN_VALUE, it's a pseudo value |
| 1523 | * beyond the limit. The given CalendarDate object must have been |
| 1524 | * normalized before calling this method. |
| 1525 | */ |
| 1526 | private final long getYearOffsetInMillis(CalendarDate date) { |
| 1527 | long t = (jcal.getDayOfYear(date) - 1) * ONE_DAY; |
| 1528 | return t + date.getTimeOfDay() - date.getZoneOffset(); |
| 1529 | } |
| 1530 | |
| 1531 | public Object clone() { |
| 1532 | JapaneseImperialCalendar other = (JapaneseImperialCalendar) super.clone(); |
| 1533 | |
| 1534 | other.jdate = (LocalGregorianCalendar.Date) jdate.clone(); |
| 1535 | other.originalFields = null; |
| 1536 | other.zoneOffsets = null; |
| 1537 | return other; |
| 1538 | } |
| 1539 | |
| 1540 | public TimeZone getTimeZone() { |
| 1541 | TimeZone zone = super.getTimeZone(); |
| 1542 | // To share the zone by the CalendarDate |
| 1543 | jdate.setZone(zone); |
| 1544 | return zone; |
| 1545 | } |
| 1546 | |
| 1547 | public void setTimeZone(TimeZone zone) { |
| 1548 | super.setTimeZone(zone); |
| 1549 | // To share the zone by the CalendarDate |
| 1550 | jdate.setZone(zone); |
| 1551 | } |
| 1552 | |
| 1553 | /** |
| 1554 | * The fixed date corresponding to jdate. If the value is |
| 1555 | * Long.MIN_VALUE, the fixed date value is unknown. |
| 1556 | */ |
| 1557 | transient private long cachedFixedDate = Long.MIN_VALUE; |
| 1558 | |
| 1559 | /** |
| 1560 | * Converts the time value (millisecond offset from the <a |
| 1561 | * href="Calendar.html#Epoch">Epoch</a>) to calendar field values. |
| 1562 | * The time is <em>not</em> |
| 1563 | * recomputed first; to recompute the time, then the fields, call the |
| 1564 | * <code>complete</code> method. |
| 1565 | * |
| 1566 | * @see Calendar#complete |
| 1567 | */ |
| 1568 | protected void computeFields() { |
| 1569 | int mask = 0; |
| 1570 | if (isPartiallyNormalized()) { |
| 1571 | // Determine which calendar fields need to be computed. |
| 1572 | mask = getSetStateFields(); |
| 1573 | int fieldMask = ~mask & ALL_FIELDS; |
| 1574 | if (fieldMask != 0 || cachedFixedDate == Long.MIN_VALUE) { |
| 1575 | mask |= computeFields(fieldMask, |
| 1576 | mask & (ZONE_OFFSET_MASK|DST_OFFSET_MASK)); |
| 1577 | assert mask == ALL_FIELDS; |
| 1578 | } |
| 1579 | } else { |
| 1580 | // Specify all fields |
| 1581 | mask = ALL_FIELDS; |
| 1582 | computeFields(mask, 0); |
| 1583 | } |
| 1584 | // After computing all the fields, set the field state to `COMPUTED'. |
| 1585 | setFieldsComputed(mask); |
| 1586 | } |
| 1587 | |
| 1588 | /** |
| 1589 | * This computeFields implements the conversion from UTC |
| 1590 | * (millisecond offset from the Epoch) to calendar |
| 1591 | * field values. fieldMask specifies which fields to change the |
| 1592 | * setting state to COMPUTED, although all fields are set to |
| 1593 | * the correct values. This is required to fix 4685354. |
| 1594 | * |
| 1595 | * @param fieldMask a bit mask to specify which fields to change |
| 1596 | * the setting state. |
| 1597 | * @param tzMask a bit mask to specify which time zone offset |
| 1598 | * fields to be used for time calculations |
| 1599 | * @return a new field mask that indicates what field values have |
| 1600 | * actually been set. |
| 1601 | */ |
| 1602 | private int computeFields(int fieldMask, int tzMask) { |
| 1603 | int zoneOffset = 0; |
| 1604 | TimeZone tz = getZone(); |
| 1605 | if (zoneOffsets == null) { |
| 1606 | zoneOffsets = new int[2]; |
| 1607 | } |
| 1608 | if (tzMask != (ZONE_OFFSET_MASK|DST_OFFSET_MASK)) { |
| 1609 | if (tz instanceof ZoneInfo) { |
| 1610 | zoneOffset = ((ZoneInfo)tz).getOffsets(time, zoneOffsets); |
| 1611 | } else { |
| 1612 | zoneOffset = tz.getOffset(time); |
| 1613 | zoneOffsets[0] = tz.getRawOffset(); |
| 1614 | zoneOffsets[1] = zoneOffset - zoneOffsets[0]; |
| 1615 | } |
| 1616 | } |
| 1617 | if (tzMask != 0) { |
| 1618 | if (isFieldSet(tzMask, ZONE_OFFSET)) { |
| 1619 | zoneOffsets[0] = internalGet(ZONE_OFFSET); |
| 1620 | } |
| 1621 | if (isFieldSet(tzMask, DST_OFFSET)) { |
| 1622 | zoneOffsets[1] = internalGet(DST_OFFSET); |
| 1623 | } |
| 1624 | zoneOffset = zoneOffsets[0] + zoneOffsets[1]; |
| 1625 | } |
| 1626 | |
| 1627 | // By computing time and zoneOffset separately, we can take |
| 1628 | // the wider range of time+zoneOffset than the previous |
| 1629 | // implementation. |
| 1630 | long fixedDate = zoneOffset / ONE_DAY; |
| 1631 | int timeOfDay = zoneOffset % (int)ONE_DAY; |
| 1632 | fixedDate += time / ONE_DAY; |
| 1633 | timeOfDay += (int) (time % ONE_DAY); |
| 1634 | if (timeOfDay >= ONE_DAY) { |
| 1635 | timeOfDay -= ONE_DAY; |
| 1636 | ++fixedDate; |
| 1637 | } else { |
| 1638 | while (timeOfDay < 0) { |
| 1639 | timeOfDay += ONE_DAY; |
| 1640 | --fixedDate; |
| 1641 | } |
| 1642 | } |
| 1643 | fixedDate += EPOCH_OFFSET; |
| 1644 | |
| 1645 | // See if we can use jdate to avoid date calculation. |
| 1646 | if (fixedDate != cachedFixedDate || fixedDate < 0) { |
| 1647 | jcal.getCalendarDateFromFixedDate(jdate, fixedDate); |
| 1648 | cachedFixedDate = fixedDate; |
| 1649 | } |
| 1650 | int era = getEraIndex(jdate); |
| 1651 | int year = jdate.getYear(); |
| 1652 | |
| 1653 | // Always set the ERA and YEAR values. |
| 1654 | internalSet(ERA, era); |
| 1655 | internalSet(YEAR, year); |
| 1656 | int mask = fieldMask | (ERA_MASK|YEAR_MASK); |
| 1657 | |
| 1658 | int month = jdate.getMonth() - 1; // 0-based |
| 1659 | int dayOfMonth = jdate.getDayOfMonth(); |
| 1660 | |
| 1661 | // Set the basic date fields. |
| 1662 | if ((fieldMask & (MONTH_MASK|DAY_OF_MONTH_MASK|DAY_OF_WEEK_MASK)) |
| 1663 | != 0) { |
| 1664 | internalSet(MONTH, month); |
| 1665 | internalSet(DAY_OF_MONTH, dayOfMonth); |
| 1666 | internalSet(DAY_OF_WEEK, jdate.getDayOfWeek()); |
| 1667 | mask |= MONTH_MASK|DAY_OF_MONTH_MASK|DAY_OF_WEEK_MASK; |
| 1668 | } |
| 1669 | |
| 1670 | if ((fieldMask & (HOUR_OF_DAY_MASK|AM_PM_MASK|HOUR_MASK |
| 1671 | |MINUTE_MASK|SECOND_MASK|MILLISECOND_MASK)) != 0) { |
| 1672 | if (timeOfDay != 0) { |
| 1673 | int hours = timeOfDay / ONE_HOUR; |
| 1674 | internalSet(HOUR_OF_DAY, hours); |
| 1675 | internalSet(AM_PM, hours / 12); // Assume AM == 0 |
| 1676 | internalSet(HOUR, hours % 12); |
| 1677 | int r = timeOfDay % ONE_HOUR; |
| 1678 | internalSet(MINUTE, r / ONE_MINUTE); |
| 1679 | r %= ONE_MINUTE; |
| 1680 | internalSet(SECOND, r / ONE_SECOND); |
| 1681 | internalSet(MILLISECOND, r % ONE_SECOND); |
| 1682 | } else { |
| 1683 | internalSet(HOUR_OF_DAY, 0); |
| 1684 | internalSet(AM_PM, AM); |
| 1685 | internalSet(HOUR, 0); |
| 1686 | internalSet(MINUTE, 0); |
| 1687 | internalSet(SECOND, 0); |
| 1688 | internalSet(MILLISECOND, 0); |
| 1689 | } |
| 1690 | mask |= (HOUR_OF_DAY_MASK|AM_PM_MASK|HOUR_MASK |
| 1691 | |MINUTE_MASK|SECOND_MASK|MILLISECOND_MASK); |
| 1692 | } |
| 1693 | |
| 1694 | if ((fieldMask & (ZONE_OFFSET_MASK|DST_OFFSET_MASK)) != 0) { |
| 1695 | internalSet(ZONE_OFFSET, zoneOffsets[0]); |
| 1696 | internalSet(DST_OFFSET, zoneOffsets[1]); |
| 1697 | mask |= (ZONE_OFFSET_MASK|DST_OFFSET_MASK); |
| 1698 | } |
| 1699 | |
| 1700 | if ((fieldMask & (DAY_OF_YEAR_MASK|WEEK_OF_YEAR_MASK |
| 1701 | |WEEK_OF_MONTH_MASK|DAY_OF_WEEK_IN_MONTH_MASK)) != 0) { |
| 1702 | int normalizedYear = jdate.getNormalizedYear(); |
| 1703 | // If it's a year of an era transition, we need to handle |
| 1704 | // irregular year boundaries. |
| 1705 | boolean transitionYear = isTransitionYear(jdate.getNormalizedYear()); |
| 1706 | int dayOfYear; |
| 1707 | long fixedDateJan1; |
| 1708 | if (transitionYear) { |
| 1709 | fixedDateJan1 = getFixedDateJan1(jdate, fixedDate); |
| 1710 | dayOfYear = (int)(fixedDate - fixedDateJan1) + 1; |
| 1711 | } else if (normalizedYear == MIN_VALUES[YEAR]) { |
| 1712 | CalendarDate dx = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 1713 | fixedDateJan1 = jcal.getFixedDate(dx); |
| 1714 | dayOfYear = (int)(fixedDate - fixedDateJan1) + 1; |
| 1715 | } else { |
| 1716 | dayOfYear = (int) jcal.getDayOfYear(jdate); |
| 1717 | fixedDateJan1 = fixedDate - dayOfYear + 1; |
| 1718 | } |
| 1719 | long fixedDateMonth1 = transitionYear ? |
| 1720 | getFixedDateMonth1(jdate, fixedDate) : fixedDate - dayOfMonth + 1; |
| 1721 | |
| 1722 | internalSet(DAY_OF_YEAR, dayOfYear); |
| 1723 | internalSet(DAY_OF_WEEK_IN_MONTH, (dayOfMonth - 1) / 7 + 1); |
| 1724 | |
| 1725 | int weekOfYear = getWeekNumber(fixedDateJan1, fixedDate); |
| 1726 | |
| 1727 | // The spec is to calculate WEEK_OF_YEAR in the |
| 1728 | // ISO8601-style. This creates problems, though. |
| 1729 | if (weekOfYear == 0) { |
| 1730 | // If the date belongs to the last week of the |
| 1731 | // previous year, use the week number of "12/31" of |
| 1732 | // the "previous" year. Again, if the previous year is |
| 1733 | // a transition year, we need to take care of it. |
| 1734 | // Usually the previous day of the first day of a year |
| 1735 | // is December 31, which is not always true in the |
| 1736 | // Japanese imperial calendar system. |
| 1737 | long fixedDec31 = fixedDateJan1 - 1; |
| 1738 | long prevJan1; |
| 1739 | LocalGregorianCalendar.Date d = getCalendarDate(fixedDec31); |
| 1740 | if (!(transitionYear || isTransitionYear(d.getNormalizedYear()))) { |
| 1741 | prevJan1 = fixedDateJan1 - 365; |
| 1742 | if (d.isLeapYear()) { |
| 1743 | --prevJan1; |
| 1744 | } |
| 1745 | } else if (transitionYear) { |
| 1746 | if (jdate.getYear() == 1) { |
| 1747 | // As of Heisei (since Meiji) there's no case |
| 1748 | // that there are multiple transitions in a |
| 1749 | // year. Historically there was such |
| 1750 | // case. There might be such case again in the |
| 1751 | // future. |
| 1752 | if (era > HEISEI) { |
| 1753 | CalendarDate pd = eras[era - 1].getSinceDate(); |
| 1754 | if (normalizedYear == pd.getYear()) { |
| 1755 | d.setMonth(pd.getMonth()).setDayOfMonth(pd.getDayOfMonth()); |
| 1756 | } |
| 1757 | } else { |
| 1758 | d.setMonth(jcal.JANUARY).setDayOfMonth(1); |
| 1759 | } |
| 1760 | jcal.normalize(d); |
| 1761 | prevJan1 = jcal.getFixedDate(d); |
| 1762 | } else { |
| 1763 | prevJan1 = fixedDateJan1 - 365; |
| 1764 | if (d.isLeapYear()) { |
| 1765 | --prevJan1; |
| 1766 | } |
| 1767 | } |
| 1768 | } else { |
| 1769 | CalendarDate cd = eras[getEraIndex(jdate)].getSinceDate(); |
| 1770 | d.setMonth(cd.getMonth()).setDayOfMonth(cd.getDayOfMonth()); |
| 1771 | jcal.normalize(d); |
| 1772 | prevJan1 = jcal.getFixedDate(d); |
| 1773 | } |
| 1774 | weekOfYear = getWeekNumber(prevJan1, fixedDec31); |
| 1775 | } else { |
| 1776 | if (!transitionYear) { |
| 1777 | // Regular years |
| 1778 | if (weekOfYear >= 52) { |
| 1779 | long nextJan1 = fixedDateJan1 + 365; |
| 1780 | if (jdate.isLeapYear()) { |
| 1781 | nextJan1++; |
| 1782 | } |
| 1783 | long nextJan1st = jcal.getDayOfWeekDateOnOrBefore(nextJan1 + 6, |
| 1784 | getFirstDayOfWeek()); |
| 1785 | int ndays = (int)(nextJan1st - nextJan1); |
| 1786 | if (ndays >= getMinimalDaysInFirstWeek() && fixedDate >= (nextJan1st - 7)) { |
| 1787 | // The first days forms a week in which the date is included. |
| 1788 | weekOfYear = 1; |
| 1789 | } |
| 1790 | } |
| 1791 | } else { |
| 1792 | LocalGregorianCalendar.Date d = (LocalGregorianCalendar.Date) jdate.clone(); |
| 1793 | long nextJan1; |
| 1794 | if (jdate.getYear() == 1) { |
| 1795 | d.addYear(+1); |
| 1796 | d.setMonth(jcal.JANUARY).setDayOfMonth(1); |
| 1797 | nextJan1 = jcal.getFixedDate(d); |
| 1798 | } else { |
| 1799 | int nextEraIndex = getEraIndex(d) + 1; |
| 1800 | CalendarDate cd = eras[nextEraIndex].getSinceDate(); |
| 1801 | d.setEra(eras[nextEraIndex]); |
| 1802 | d.setDate(1, cd.getMonth(), cd.getDayOfMonth()); |
| 1803 | jcal.normalize(d); |
| 1804 | nextJan1 = jcal.getFixedDate(d); |
| 1805 | } |
| 1806 | long nextJan1st = jcal.getDayOfWeekDateOnOrBefore(nextJan1 + 6, |
| 1807 | getFirstDayOfWeek()); |
| 1808 | int ndays = (int)(nextJan1st - nextJan1); |
| 1809 | if (ndays >= getMinimalDaysInFirstWeek() && fixedDate >= (nextJan1st - 7)) { |
| 1810 | // The first days forms a week in which the date is included. |
| 1811 | weekOfYear = 1; |
| 1812 | } |
| 1813 | } |
| 1814 | } |
| 1815 | internalSet(WEEK_OF_YEAR, weekOfYear); |
| 1816 | internalSet(WEEK_OF_MONTH, getWeekNumber(fixedDateMonth1, fixedDate)); |
| 1817 | mask |= (DAY_OF_YEAR_MASK|WEEK_OF_YEAR_MASK|WEEK_OF_MONTH_MASK|DAY_OF_WEEK_IN_MONTH_MASK); |
| 1818 | } |
| 1819 | return mask; |
| 1820 | } |
| 1821 | |
| 1822 | /** |
| 1823 | * Returns the number of weeks in a period between fixedDay1 and |
| 1824 | * fixedDate. The getFirstDayOfWeek-getMinimalDaysInFirstWeek rule |
| 1825 | * is applied to calculate the number of weeks. |
| 1826 | * |
| 1827 | * @param fixedDay1 the fixed date of the first day of the period |
| 1828 | * @param fixedDate the fixed date of the last day of the period |
| 1829 | * @return the number of weeks of the given period |
| 1830 | */ |
| 1831 | private final int getWeekNumber(long fixedDay1, long fixedDate) { |
| 1832 | // We can always use `jcal' since Julian and Gregorian are the |
| 1833 | // same thing for this calculation. |
| 1834 | long fixedDay1st = jcal.getDayOfWeekDateOnOrBefore(fixedDay1 + 6, |
| 1835 | getFirstDayOfWeek()); |
| 1836 | int ndays = (int)(fixedDay1st - fixedDay1); |
| 1837 | assert ndays <= 7; |
| 1838 | if (ndays >= getMinimalDaysInFirstWeek()) { |
| 1839 | fixedDay1st -= 7; |
| 1840 | } |
| 1841 | int normalizedDayOfPeriod = (int)(fixedDate - fixedDay1st); |
| 1842 | if (normalizedDayOfPeriod >= 0) { |
| 1843 | return normalizedDayOfPeriod / 7 + 1; |
| 1844 | } |
| 1845 | return CalendarUtils.floorDivide(normalizedDayOfPeriod, 7) + 1; |
| 1846 | } |
| 1847 | |
| 1848 | /** |
| 1849 | * Converts calendar field values to the time value (millisecond |
| 1850 | * offset from the <a href="Calendar.html#Epoch">Epoch</a>). |
| 1851 | * |
| 1852 | * @exception IllegalArgumentException if any calendar fields are invalid. |
| 1853 | */ |
| 1854 | protected void computeTime() { |
| 1855 | // In non-lenient mode, perform brief checking of calendar |
| 1856 | // fields which have been set externally. Through this |
| 1857 | // checking, the field values are stored in originalFields[] |
| 1858 | // to see if any of them are normalized later. |
| 1859 | if (!isLenient()) { |
| 1860 | if (originalFields == null) { |
| 1861 | originalFields = new int[FIELD_COUNT]; |
| 1862 | } |
| 1863 | for (int field = 0; field < FIELD_COUNT; field++) { |
| 1864 | int value = internalGet(field); |
| 1865 | if (isExternallySet(field)) { |
| 1866 | // Quick validation for any out of range values |
| 1867 | if (value < getMinimum(field) || value > getMaximum(field)) { |
| 1868 | throw new IllegalArgumentException(getFieldName(field)); |
| 1869 | } |
| 1870 | } |
| 1871 | originalFields[field] = value; |
| 1872 | } |
| 1873 | } |
| 1874 | |
| 1875 | // Let the super class determine which calendar fields to be |
| 1876 | // used to calculate the time. |
| 1877 | int fieldMask = selectFields(); |
| 1878 | |
| 1879 | int year; |
| 1880 | int era; |
| 1881 | |
| 1882 | if (isSet(ERA)) { |
| 1883 | era = internalGet(ERA); |
| 1884 | year = isSet(YEAR) ? internalGet(YEAR) : 1; |
| 1885 | } else { |
| 1886 | if (isSet(YEAR)) { |
| 1887 | era = eras.length - 1; |
| 1888 | year = internalGet(YEAR); |
| 1889 | } else { |
| 1890 | // Equivalent to 1970 (Gregorian) |
| 1891 | era = SHOWA; |
| 1892 | year = 45; |
| 1893 | } |
| 1894 | } |
| 1895 | |
| 1896 | // Calculate the time of day. We rely on the convention that |
| 1897 | // an UNSET field has 0. |
| 1898 | long timeOfDay = 0; |
| 1899 | if (isFieldSet(fieldMask, HOUR_OF_DAY)) { |
| 1900 | timeOfDay += (long) internalGet(HOUR_OF_DAY); |
| 1901 | } else { |
| 1902 | timeOfDay += internalGet(HOUR); |
| 1903 | // The default value of AM_PM is 0 which designates AM. |
| 1904 | if (isFieldSet(fieldMask, AM_PM)) { |
| 1905 | timeOfDay += 12 * internalGet(AM_PM); |
| 1906 | } |
| 1907 | } |
| 1908 | timeOfDay *= 60; |
| 1909 | timeOfDay += internalGet(MINUTE); |
| 1910 | timeOfDay *= 60; |
| 1911 | timeOfDay += internalGet(SECOND); |
| 1912 | timeOfDay *= 1000; |
| 1913 | timeOfDay += internalGet(MILLISECOND); |
| 1914 | |
| 1915 | // Convert the time of day to the number of days and the |
| 1916 | // millisecond offset from midnight. |
| 1917 | long fixedDate = timeOfDay / ONE_DAY; |
| 1918 | timeOfDay %= ONE_DAY; |
| 1919 | while (timeOfDay < 0) { |
| 1920 | timeOfDay += ONE_DAY; |
| 1921 | --fixedDate; |
| 1922 | } |
| 1923 | |
| 1924 | // Calculate the fixed date since January 1, 1 (Gregorian). |
| 1925 | fixedDate += getFixedDate(era, year, fieldMask); |
| 1926 | |
| 1927 | // millis represents local wall-clock time in milliseconds. |
| 1928 | long millis = (fixedDate - EPOCH_OFFSET) * ONE_DAY + timeOfDay; |
| 1929 | |
| 1930 | // Compute the time zone offset and DST offset. There are two potential |
| 1931 | // ambiguities here. We'll assume a 2:00 am (wall time) switchover time |
| 1932 | // for discussion purposes here. |
| 1933 | // 1. The transition into DST. Here, a designated time of 2:00 am - 2:59 am |
| 1934 | // can be in standard or in DST depending. However, 2:00 am is an invalid |
| 1935 | // representation (the representation jumps from 1:59:59 am Std to 3:00:00 am DST). |
| 1936 | // We assume standard time. |
| 1937 | // 2. The transition out of DST. Here, a designated time of 1:00 am - 1:59 am |
| 1938 | // can be in standard or DST. Both are valid representations (the rep |
| 1939 | // jumps from 1:59:59 DST to 1:00:00 Std). |
| 1940 | // Again, we assume standard time. |
| 1941 | // We use the TimeZone object, unless the user has explicitly set the ZONE_OFFSET |
| 1942 | // or DST_OFFSET fields; then we use those fields. |
| 1943 | TimeZone zone = getZone(); |
| 1944 | if (zoneOffsets == null) { |
| 1945 | zoneOffsets = new int[2]; |
| 1946 | } |
| 1947 | int tzMask = fieldMask & (ZONE_OFFSET_MASK|DST_OFFSET_MASK); |
| 1948 | if (tzMask != (ZONE_OFFSET_MASK|DST_OFFSET_MASK)) { |
| 1949 | if (zone instanceof ZoneInfo) { |
| 1950 | ((ZoneInfo)zone).getOffsetsByWall(millis, zoneOffsets); |
| 1951 | } else { |
| 1952 | zone.getOffsets(millis - zone.getRawOffset(), zoneOffsets); |
| 1953 | } |
| 1954 | } |
| 1955 | if (tzMask != 0) { |
| 1956 | if (isFieldSet(tzMask, ZONE_OFFSET)) { |
| 1957 | zoneOffsets[0] = internalGet(ZONE_OFFSET); |
| 1958 | } |
| 1959 | if (isFieldSet(tzMask, DST_OFFSET)) { |
| 1960 | zoneOffsets[1] = internalGet(DST_OFFSET); |
| 1961 | } |
| 1962 | } |
| 1963 | |
| 1964 | // Adjust the time zone offset values to get the UTC time. |
| 1965 | millis -= zoneOffsets[0] + zoneOffsets[1]; |
| 1966 | |
| 1967 | // Set this calendar's time in milliseconds |
| 1968 | time = millis; |
| 1969 | |
| 1970 | int mask = computeFields(fieldMask | getSetStateFields(), tzMask); |
| 1971 | |
| 1972 | if (!isLenient()) { |
| 1973 | for (int field = 0; field < FIELD_COUNT; field++) { |
| 1974 | if (!isExternallySet(field)) { |
| 1975 | continue; |
| 1976 | } |
| 1977 | if (originalFields[field] != internalGet(field)) { |
| 1978 | int wrongValue = internalGet(field); |
| 1979 | // Restore the original field values |
| 1980 | System.arraycopy(originalFields, 0, fields, 0, fields.length); |
| 1981 | throw new IllegalArgumentException(getFieldName(field) + "=" + wrongValue |
| 1982 | + ", expected " + originalFields[field]); |
| 1983 | } |
| 1984 | } |
| 1985 | } |
| 1986 | setFieldsNormalized(mask); |
| 1987 | } |
| 1988 | |
| 1989 | /** |
| 1990 | * Computes the fixed date under either the Gregorian or the |
| 1991 | * Julian calendar, using the given year and the specified calendar fields. |
| 1992 | * |
| 1993 | * @param cal the CalendarSystem to be used for the date calculation |
| 1994 | * @param year the normalized year number, with 0 indicating the |
| 1995 | * year 1 BCE, -1 indicating 2 BCE, etc. |
| 1996 | * @param fieldMask the calendar fields to be used for the date calculation |
| 1997 | * @return the fixed date |
| 1998 | * @see Calendar#selectFields |
| 1999 | */ |
| 2000 | private long getFixedDate(int era, int year, int fieldMask) { |
| 2001 | int month = JANUARY; |
| 2002 | int firstDayOfMonth = 1; |
| 2003 | if (isFieldSet(fieldMask, MONTH)) { |
| 2004 | // No need to check if MONTH has been set (no isSet(MONTH) |
| 2005 | // call) since its unset value happens to be JANUARY (0). |
| 2006 | month = internalGet(MONTH); |
| 2007 | |
| 2008 | // If the month is out of range, adjust it into range. |
| 2009 | if (month > DECEMBER) { |
| 2010 | year += month / 12; |
| 2011 | month %= 12; |
| 2012 | } else if (month < JANUARY) { |
| 2013 | int[] rem = new int[1]; |
| 2014 | year += CalendarUtils.floorDivide(month, 12, rem); |
| 2015 | month = rem[0]; |
| 2016 | } |
| 2017 | } else { |
| 2018 | if (year == 1 && era != 0) { |
| 2019 | CalendarDate d = eras[era].getSinceDate(); |
| 2020 | month = d.getMonth() - 1; |
| 2021 | firstDayOfMonth = d.getDayOfMonth(); |
| 2022 | } |
| 2023 | } |
| 2024 | |
| 2025 | // Adjust the base date if year is the minimum value. |
| 2026 | if (year == MIN_VALUES[YEAR]) { |
| 2027 | CalendarDate dx = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 2028 | int m = dx.getMonth() - 1; |
| 2029 | if (month < m) |
| 2030 | month = m; |
| 2031 | if (month == m) |
| 2032 | firstDayOfMonth = dx.getDayOfMonth(); |
| 2033 | } |
| 2034 | |
| 2035 | LocalGregorianCalendar.Date date = jcal.newCalendarDate(TimeZone.NO_TIMEZONE); |
| 2036 | date.setEra(era > 0 ? eras[era] : null); |
| 2037 | date.setDate(year, month + 1, firstDayOfMonth); |
| 2038 | jcal.normalize(date); |
| 2039 | |
| 2040 | // Get the fixed date since Jan 1, 1 (Gregorian). We are on |
| 2041 | // the first day of either `month' or January in 'year'. |
| 2042 | long fixedDate = jcal.getFixedDate(date); |
| 2043 | |
| 2044 | if (isFieldSet(fieldMask, MONTH)) { |
| 2045 | // Month-based calculations |
| 2046 | if (isFieldSet(fieldMask, DAY_OF_MONTH)) { |
| 2047 | // We are on the "first day" of the month (which may |
| 2048 | // not be 1). Just add the offset if DAY_OF_MONTH is |
| 2049 | // set. If the isSet call returns false, that means |
| 2050 | // DAY_OF_MONTH has been selected just because of the |
| 2051 | // selected combination. We don't need to add any |
| 2052 | // since the default value is the "first day". |
| 2053 | if (isSet(DAY_OF_MONTH)) { |
| 2054 | // To avoid underflow with DAY_OF_MONTH-firstDayOfMonth, add |
| 2055 | // DAY_OF_MONTH, then subtract firstDayOfMonth. |
| 2056 | fixedDate += internalGet(DAY_OF_MONTH); |
| 2057 | fixedDate -= firstDayOfMonth; |
| 2058 | } |
| 2059 | } else { |
| 2060 | if (isFieldSet(fieldMask, WEEK_OF_MONTH)) { |
| 2061 | long firstDayOfWeek = jcal.getDayOfWeekDateOnOrBefore(fixedDate + 6, |
| 2062 | getFirstDayOfWeek()); |
| 2063 | // If we have enough days in the first week, then |
| 2064 | // move to the previous week. |
| 2065 | if ((firstDayOfWeek - fixedDate) >= getMinimalDaysInFirstWeek()) { |
| 2066 | firstDayOfWeek -= 7; |
| 2067 | } |
| 2068 | if (isFieldSet(fieldMask, DAY_OF_WEEK)) { |
| 2069 | firstDayOfWeek = jcal.getDayOfWeekDateOnOrBefore(firstDayOfWeek + 6, |
| 2070 | internalGet(DAY_OF_WEEK)); |
| 2071 | } |
| 2072 | // In lenient mode, we treat days of the previous |
| 2073 | // months as a part of the specified |
| 2074 | // WEEK_OF_MONTH. See 4633646. |
| 2075 | fixedDate = firstDayOfWeek + 7 * (internalGet(WEEK_OF_MONTH) - 1); |
| 2076 | } else { |
| 2077 | int dayOfWeek; |
| 2078 | if (isFieldSet(fieldMask, DAY_OF_WEEK)) { |
| 2079 | dayOfWeek = internalGet(DAY_OF_WEEK); |
| 2080 | } else { |
| 2081 | dayOfWeek = getFirstDayOfWeek(); |
| 2082 | } |
| 2083 | // We are basing this on the day-of-week-in-month. The only |
| 2084 | // trickiness occurs if the day-of-week-in-month is |
| 2085 | // negative. |
| 2086 | int dowim; |
| 2087 | if (isFieldSet(fieldMask, DAY_OF_WEEK_IN_MONTH)) { |
| 2088 | dowim = internalGet(DAY_OF_WEEK_IN_MONTH); |
| 2089 | } else { |
| 2090 | dowim = 1; |
| 2091 | } |
| 2092 | if (dowim >= 0) { |
| 2093 | fixedDate = jcal.getDayOfWeekDateOnOrBefore(fixedDate + (7 * dowim) - 1, |
| 2094 | dayOfWeek); |
| 2095 | } else { |
| 2096 | // Go to the first day of the next week of |
| 2097 | // the specified week boundary. |
| 2098 | int lastDate = monthLength(month, year) + (7 * (dowim + 1)); |
| 2099 | // Then, get the day of week date on or before the last date. |
| 2100 | fixedDate = jcal.getDayOfWeekDateOnOrBefore(fixedDate + lastDate - 1, |
| 2101 | dayOfWeek); |
| 2102 | } |
| 2103 | } |
| 2104 | } |
| 2105 | } else { |
| 2106 | // We are on the first day of the year. |
| 2107 | if (isFieldSet(fieldMask, DAY_OF_YEAR)) { |
| 2108 | if (isTransitionYear(date.getNormalizedYear())) { |
| 2109 | fixedDate = getFixedDateJan1(date, fixedDate); |
| 2110 | } |
| 2111 | // Add the offset, then subtract 1. (Make sure to avoid underflow.) |
| 2112 | fixedDate += internalGet(DAY_OF_YEAR); |
| 2113 | fixedDate--; |
| 2114 | } else { |
| 2115 | long firstDayOfWeek = jcal.getDayOfWeekDateOnOrBefore(fixedDate + 6, |
| 2116 | getFirstDayOfWeek()); |
| 2117 | // If we have enough days in the first week, then move |
| 2118 | // to the previous week. |
| 2119 | if ((firstDayOfWeek - fixedDate) >= getMinimalDaysInFirstWeek()) { |
| 2120 | firstDayOfWeek -= 7; |
| 2121 | } |
| 2122 | if (isFieldSet(fieldMask, DAY_OF_WEEK)) { |
| 2123 | int dayOfWeek = internalGet(DAY_OF_WEEK); |
| 2124 | if (dayOfWeek != getFirstDayOfWeek()) { |
| 2125 | firstDayOfWeek = jcal.getDayOfWeekDateOnOrBefore(firstDayOfWeek + 6, |
| 2126 | dayOfWeek); |
| 2127 | } |
| 2128 | } |
| 2129 | fixedDate = firstDayOfWeek + 7 * ((long)internalGet(WEEK_OF_YEAR) - 1); |
| 2130 | } |
| 2131 | } |
| 2132 | return fixedDate; |
| 2133 | } |
| 2134 | |
| 2135 | /** |
| 2136 | * Returns the fixed date of the first day of the year (usually |
| 2137 | * January 1) before the specified date. |
| 2138 | * |
| 2139 | * @param date the date for which the first day of the year is |
| 2140 | * calculated. The date has to be in the cut-over year. |
| 2141 | * @param fixedDate the fixed date representation of the date |
| 2142 | */ |
| 2143 | private final long getFixedDateJan1(LocalGregorianCalendar.Date date, long fixedDate) { |
| 2144 | Era era = date.getEra(); |
| 2145 | if (date.getEra() != null && date.getYear() == 1) { |
| 2146 | for (int eraIndex = getEraIndex(date); eraIndex > 0; eraIndex--) { |
| 2147 | CalendarDate d = eras[eraIndex].getSinceDate(); |
| 2148 | long fd = gcal.getFixedDate(d); |
| 2149 | // There might be multiple era transitions in a year. |
| 2150 | if (fd > fixedDate) { |
| 2151 | continue; |
| 2152 | } |
| 2153 | return fd; |
| 2154 | } |
| 2155 | } |
| 2156 | CalendarDate d = gcal.newCalendarDate(TimeZone.NO_TIMEZONE); |
| 2157 | d.setDate(date.getNormalizedYear(), gcal.JANUARY, 1); |
| 2158 | return gcal.getFixedDate(d); |
| 2159 | } |
| 2160 | |
| 2161 | /** |
| 2162 | * Returns the fixed date of the first date of the month (usually |
| 2163 | * the 1st of the month) before the specified date. |
| 2164 | * |
| 2165 | * @param date the date for which the first day of the month is |
| 2166 | * calculated. The date must be in the era transition year. |
| 2167 | * @param fixedDate the fixed date representation of the date |
| 2168 | */ |
| 2169 | private final long getFixedDateMonth1(LocalGregorianCalendar.Date date, |
| 2170 | long fixedDate) { |
| 2171 | int eraIndex = getTransitionEraIndex(date); |
| 2172 | if (eraIndex != -1) { |
| 2173 | long transition = sinceFixedDates[eraIndex]; |
| 2174 | // If the given date is on or after the transition date, then |
| 2175 | // return the transition date. |
| 2176 | if (transition <= fixedDate) { |
| 2177 | return transition; |
| 2178 | } |
| 2179 | } |
| 2180 | |
| 2181 | // Otherwise, we can use the 1st day of the month. |
| 2182 | return fixedDate - date.getDayOfMonth() + 1; |
| 2183 | } |
| 2184 | |
| 2185 | /** |
| 2186 | * Returns a LocalGregorianCalendar.Date produced from the specified fixed date. |
| 2187 | * |
| 2188 | * @param fd the fixed date |
| 2189 | */ |
| 2190 | private static final LocalGregorianCalendar.Date getCalendarDate(long fd) { |
| 2191 | LocalGregorianCalendar.Date d = jcal.newCalendarDate(TimeZone.NO_TIMEZONE); |
| 2192 | jcal.getCalendarDateFromFixedDate(d, fd); |
| 2193 | return d; |
| 2194 | } |
| 2195 | |
| 2196 | /** |
| 2197 | * Returns the length of the specified month in the specified |
| 2198 | * Gregorian year. The year number must be normalized. |
| 2199 | * |
| 2200 | * @see #isLeapYear(int) |
| 2201 | */ |
| 2202 | private final int monthLength(int month, int gregorianYear) { |
| 2203 | return CalendarUtils.isGregorianLeapYear(gregorianYear) ? |
| 2204 | GregorianCalendar.LEAP_MONTH_LENGTH[month] : GregorianCalendar.MONTH_LENGTH[month]; |
| 2205 | } |
| 2206 | |
| 2207 | /** |
| 2208 | * Returns the length of the specified month in the year provided |
| 2209 | * by internalGet(YEAR). |
| 2210 | * |
| 2211 | * @see #isLeapYear(int) |
| 2212 | */ |
| 2213 | private final int monthLength(int month) { |
| 2214 | assert jdate.isNormalized(); |
| 2215 | return jdate.isLeapYear() ? |
| 2216 | GregorianCalendar.LEAP_MONTH_LENGTH[month] : GregorianCalendar.MONTH_LENGTH[month]; |
| 2217 | } |
| 2218 | |
| 2219 | private final int actualMonthLength() { |
| 2220 | int length = jcal.getMonthLength(jdate); |
| 2221 | int eraIndex = getTransitionEraIndex(jdate); |
| 2222 | if (eraIndex == -1) { |
| 2223 | long transitionFixedDate = sinceFixedDates[eraIndex]; |
| 2224 | CalendarDate d = eras[eraIndex].getSinceDate(); |
| 2225 | if (transitionFixedDate <= cachedFixedDate) { |
| 2226 | length -= d.getDayOfMonth() - 1; |
| 2227 | } else { |
| 2228 | length = d.getDayOfMonth() - 1; |
| 2229 | } |
| 2230 | } |
| 2231 | return length; |
| 2232 | } |
| 2233 | |
| 2234 | /** |
| 2235 | * Returns the index to the new era if the given date is in a |
| 2236 | * transition month. For example, if the give date is Heisei 1 |
| 2237 | * (1989) January 20, then the era index for Heisei is |
| 2238 | * returned. Likewise, if the given date is Showa 64 (1989) |
| 2239 | * January 3, then the era index for Heisei is returned. If the |
| 2240 | * given date is not in any transition month, then -1 is returned. |
| 2241 | */ |
| 2242 | private static final int getTransitionEraIndex(LocalGregorianCalendar.Date date) { |
| 2243 | int eraIndex = getEraIndex(date); |
| 2244 | CalendarDate transitionDate = eras[eraIndex].getSinceDate(); |
| 2245 | if (transitionDate.getYear() == date.getNormalizedYear() && |
| 2246 | transitionDate.getMonth() == date.getMonth()) { |
| 2247 | return eraIndex; |
| 2248 | } |
| 2249 | if (eraIndex < eras.length - 1) { |
| 2250 | transitionDate = eras[++eraIndex].getSinceDate(); |
| 2251 | if (transitionDate.getYear() == date.getNormalizedYear() && |
| 2252 | transitionDate.getMonth() == date.getMonth()) { |
| 2253 | return eraIndex; |
| 2254 | } |
| 2255 | } |
| 2256 | return -1; |
| 2257 | } |
| 2258 | |
| 2259 | private final boolean isTransitionYear(int normalizedYear) { |
| 2260 | for (int i = eras.length - 1; i > 0; i--) { |
| 2261 | int transitionYear = eras[i].getSinceDate().getYear(); |
| 2262 | if (normalizedYear == transitionYear) { |
| 2263 | return true; |
| 2264 | } |
| 2265 | if (normalizedYear > transitionYear) { |
| 2266 | break; |
| 2267 | } |
| 2268 | } |
| 2269 | return false; |
| 2270 | } |
| 2271 | |
| 2272 | private static final int getEraIndex(LocalGregorianCalendar.Date date) { |
| 2273 | Era era = date.getEra(); |
| 2274 | for (int i = eras.length - 1; i > 0; i--) { |
| 2275 | if (eras[i] == era) { |
| 2276 | return i; |
| 2277 | } |
| 2278 | } |
| 2279 | return 0; |
| 2280 | } |
| 2281 | |
| 2282 | /** |
| 2283 | * Returns this object if it's normalized (all fields and time are |
| 2284 | * in sync). Otherwise, a cloned object is returned after calling |
| 2285 | * complete() in lenient mode. |
| 2286 | */ |
| 2287 | private final JapaneseImperialCalendar getNormalizedCalendar() { |
| 2288 | JapaneseImperialCalendar jc; |
| 2289 | if (isFullyNormalized()) { |
| 2290 | jc = this; |
| 2291 | } else { |
| 2292 | // Create a clone and normalize the calendar fields |
| 2293 | jc = (JapaneseImperialCalendar) this.clone(); |
| 2294 | jc.setLenient(true); |
| 2295 | jc.complete(); |
| 2296 | } |
| 2297 | return jc; |
| 2298 | } |
| 2299 | |
| 2300 | /** |
| 2301 | * After adjustments such as add(MONTH), add(YEAR), we don't want the |
| 2302 | * month to jump around. E.g., we don't want Jan 31 + 1 month to go to Mar |
| 2303 | * 3, we want it to go to Feb 28. Adjustments which might run into this |
| 2304 | * problem call this method to retain the proper month. |
| 2305 | */ |
| 2306 | private final void pinDayOfMonth(LocalGregorianCalendar.Date date) { |
| 2307 | int year = date.getYear(); |
| 2308 | int dom = date.getDayOfMonth(); |
| 2309 | if (year != getMinimum(YEAR)) { |
| 2310 | date.setDayOfMonth(1); |
| 2311 | jcal.normalize(date); |
| 2312 | int monthLength = jcal.getMonthLength(date); |
| 2313 | if (dom > monthLength) { |
| 2314 | date.setDayOfMonth(monthLength); |
| 2315 | } else { |
| 2316 | date.setDayOfMonth(dom); |
| 2317 | } |
| 2318 | jcal.normalize(date); |
| 2319 | } else { |
| 2320 | LocalGregorianCalendar.Date d = jcal.getCalendarDate(Long.MIN_VALUE, getZone()); |
| 2321 | LocalGregorianCalendar.Date realDate = jcal.getCalendarDate(time, getZone()); |
| 2322 | long tod = realDate.getTimeOfDay(); |
| 2323 | // Use an equivalent year. |
| 2324 | realDate.addYear(+400); |
| 2325 | realDate.setMonth(date.getMonth()); |
| 2326 | realDate.setDayOfMonth(1); |
| 2327 | jcal.normalize(realDate); |
| 2328 | int monthLength = jcal.getMonthLength(realDate); |
| 2329 | if (dom > monthLength) { |
| 2330 | realDate.setDayOfMonth(monthLength); |
| 2331 | } else { |
| 2332 | if (dom < d.getDayOfMonth()) { |
| 2333 | realDate.setDayOfMonth(d.getDayOfMonth()); |
| 2334 | } else { |
| 2335 | realDate.setDayOfMonth(dom); |
| 2336 | } |
| 2337 | } |
| 2338 | if (realDate.getDayOfMonth() == d.getDayOfMonth() && tod < d.getTimeOfDay()) { |
| 2339 | realDate.setDayOfMonth(Math.min(dom + 1, monthLength)); |
| 2340 | } |
| 2341 | // restore the year. |
| 2342 | date.setDate(year, realDate.getMonth(), realDate.getDayOfMonth()); |
| 2343 | // Don't normalize date here so as not to cause underflow. |
| 2344 | } |
| 2345 | } |
| 2346 | |
| 2347 | /** |
| 2348 | * Returns the new value after 'roll'ing the specified value and amount. |
| 2349 | */ |
| 2350 | private static final int getRolledValue(int value, int amount, int min, int max) { |
| 2351 | assert value >= min && value <= max; |
| 2352 | int range = max - min + 1; |
| 2353 | amount %= range; |
| 2354 | int n = value + amount; |
| 2355 | if (n > max) { |
| 2356 | n -= range; |
| 2357 | } else if (n < min) { |
| 2358 | n += range; |
| 2359 | } |
| 2360 | assert n >= min && n <= max; |
| 2361 | return n; |
| 2362 | } |
| 2363 | |
| 2364 | /** |
| 2365 | * Returns the ERA. We need a special method for this because the |
| 2366 | * default ERA is the current era, but a zero (unset) ERA means before Meiji. |
| 2367 | */ |
| 2368 | private final int internalGetEra() { |
| 2369 | return isSet(ERA) ? internalGet(ERA) : eras.length - 1; |
| 2370 | } |
| 2371 | |
| 2372 | /** |
| 2373 | * Updates internal state. |
| 2374 | */ |
| 2375 | private void readObject(ObjectInputStream stream) |
| 2376 | throws IOException, ClassNotFoundException { |
| 2377 | stream.defaultReadObject(); |
| 2378 | if (jdate == null) { |
| 2379 | jdate = jcal.newCalendarDate(getZone()); |
| 2380 | cachedFixedDate = Long.MIN_VALUE; |
| 2381 | } |
| 2382 | } |
| 2383 | } |