| 1 | /* |
| 2 | * Copyright 2001-2005 Stephen Colebourne |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.joda.time.chrono; |
| 17 | |
| 18 | import java.util.Locale; |
| 19 | |
| 20 | import org.joda.time.Chronology; |
| 21 | import org.joda.time.DateTimeConstants; |
| 22 | import org.joda.time.DateTimeField; |
| 23 | import org.joda.time.DateTimeFieldType; |
| 24 | import org.joda.time.DateTimeZone; |
| 25 | import org.joda.time.DurationField; |
| 26 | import org.joda.time.DurationFieldType; |
| 27 | import org.joda.time.field.DividedDateTimeField; |
| 28 | import org.joda.time.field.FieldUtils; |
| 29 | import org.joda.time.field.MillisDurationField; |
| 30 | import org.joda.time.field.OffsetDateTimeField; |
| 31 | import org.joda.time.field.PreciseDateTimeField; |
| 32 | import org.joda.time.field.PreciseDurationField; |
| 33 | import org.joda.time.field.RemainderDateTimeField; |
| 34 | import org.joda.time.field.ZeroIsMaxDateTimeField; |
| 35 | |
| 36 | /** |
| 37 | * Abstract implementation for calendar systems that use a typical |
| 38 | * day/month/year/leapYear model. |
| 39 | * Most of the utility methods required by subclasses are package-private, |
| 40 | * reflecting the intention that they be defined in the same package. |
| 41 | * <p> |
| 42 | * BasicChronology is thread-safe and immutable, and all subclasses must |
| 43 | * be as well. |
| 44 | * |
| 45 | * @author Stephen Colebourne |
| 46 | * @author Brian S O'Neill |
| 47 | * @author Guy Allard |
| 48 | * @since 1.2, renamed from BaseGJChronology |
| 49 | */ |
| 50 | abstract class BasicChronology extends AssembledChronology { |
| 51 | |
| 52 | /** Serialization lock */ |
| 53 | private static final long serialVersionUID = 8283225332206808863L; |
| 54 | |
| 55 | private static final DurationField cMillisField; |
| 56 | private static final DurationField cSecondsField; |
| 57 | private static final DurationField cMinutesField; |
| 58 | private static final DurationField cHoursField; |
| 59 | private static final DurationField cHalfdaysField; |
| 60 | private static final DurationField cDaysField; |
| 61 | private static final DurationField cWeeksField; |
| 62 | |
| 63 | private static final DateTimeField cMillisOfSecondField; |
| 64 | private static final DateTimeField cMillisOfDayField; |
| 65 | private static final DateTimeField cSecondOfMinuteField; |
| 66 | private static final DateTimeField cSecondOfDayField; |
| 67 | private static final DateTimeField cMinuteOfHourField; |
| 68 | private static final DateTimeField cMinuteOfDayField; |
| 69 | private static final DateTimeField cHourOfDayField; |
| 70 | private static final DateTimeField cHourOfHalfdayField; |
| 71 | private static final DateTimeField cClockhourOfDayField; |
| 72 | private static final DateTimeField cClockhourOfHalfdayField; |
| 73 | private static final DateTimeField cHalfdayOfDayField; |
| 74 | |
| 75 | static { |
| 76 | cMillisField = MillisDurationField.INSTANCE; |
| 77 | cSecondsField = new PreciseDurationField |
| 78 | (DurationFieldType.seconds(), DateTimeConstants.MILLIS_PER_SECOND); |
| 79 | cMinutesField = new PreciseDurationField |
| 80 | (DurationFieldType.minutes(), DateTimeConstants.MILLIS_PER_MINUTE); |
| 81 | cHoursField = new PreciseDurationField |
| 82 | (DurationFieldType.hours(), DateTimeConstants.MILLIS_PER_HOUR); |
| 83 | cHalfdaysField = new PreciseDurationField |
| 84 | (DurationFieldType.halfdays(), DateTimeConstants.MILLIS_PER_DAY / 2); |
| 85 | cDaysField = new PreciseDurationField |
| 86 | (DurationFieldType.days(), DateTimeConstants.MILLIS_PER_DAY); |
| 87 | cWeeksField = new PreciseDurationField |
| 88 | (DurationFieldType.weeks(), DateTimeConstants.MILLIS_PER_WEEK); |
| 89 | |
| 90 | cMillisOfSecondField = new PreciseDateTimeField |
| 91 | (DateTimeFieldType.millisOfSecond(), cMillisField, cSecondsField); |
| 92 | |
| 93 | cMillisOfDayField = new PreciseDateTimeField |
| 94 | (DateTimeFieldType.millisOfDay(), cMillisField, cDaysField); |
| 95 | |
| 96 | cSecondOfMinuteField = new PreciseDateTimeField |
| 97 | (DateTimeFieldType.secondOfMinute(), cSecondsField, cMinutesField); |
| 98 | |
| 99 | cSecondOfDayField = new PreciseDateTimeField |
| 100 | (DateTimeFieldType.secondOfDay(), cSecondsField, cDaysField); |
| 101 | |
| 102 | cMinuteOfHourField = new PreciseDateTimeField |
| 103 | (DateTimeFieldType.minuteOfHour(), cMinutesField, cHoursField); |
| 104 | |
| 105 | cMinuteOfDayField = new PreciseDateTimeField |
| 106 | (DateTimeFieldType.minuteOfDay(), cMinutesField, cDaysField); |
| 107 | |
| 108 | cHourOfDayField = new PreciseDateTimeField |
| 109 | (DateTimeFieldType.hourOfDay(), cHoursField, cDaysField); |
| 110 | |
| 111 | cHourOfHalfdayField = new PreciseDateTimeField |
| 112 | (DateTimeFieldType.hourOfHalfday(), cHoursField, cHalfdaysField); |
| 113 | |
| 114 | cClockhourOfDayField = new ZeroIsMaxDateTimeField |
| 115 | (cHourOfDayField, DateTimeFieldType.clockhourOfDay()); |
| 116 | |
| 117 | cClockhourOfHalfdayField = new ZeroIsMaxDateTimeField |
| 118 | (cHourOfHalfdayField, DateTimeFieldType.clockhourOfHalfday()); |
| 119 | |
| 120 | cHalfdayOfDayField = new HalfdayField(); |
| 121 | } |
| 122 | |
| 123 | private static final int CACHE_SIZE = 1 << 10; |
| 124 | private static final int CACHE_MASK = CACHE_SIZE - 1; |
| 125 | |
| 126 | private transient final YearInfo[] iYearInfoCache = new YearInfo[CACHE_SIZE]; |
| 127 | |
| 128 | private final int iMinDaysInFirstWeek; |
| 129 | |
| 130 | BasicChronology(Chronology base, Object param, int minDaysInFirstWeek) { |
| 131 | super(base, param); |
| 132 | |
| 133 | if (minDaysInFirstWeek < 1 || minDaysInFirstWeek > 7) { |
| 134 | throw new IllegalArgumentException |
| 135 | ("Invalid min days in first week: " + minDaysInFirstWeek); |
| 136 | } |
| 137 | |
| 138 | iMinDaysInFirstWeek = minDaysInFirstWeek; |
| 139 | } |
| 140 | |
| 141 | public DateTimeZone getZone() { |
| 142 | Chronology base; |
| 143 | if ((base = getBase()) != null) { |
| 144 | return base.getZone(); |
| 145 | } |
| 146 | return DateTimeZone.UTC; |
| 147 | } |
| 148 | |
| 149 | public long getDateTimeMillis( |
| 150 | int year, int monthOfYear, int dayOfMonth, int millisOfDay) |
| 151 | throws IllegalArgumentException { |
| 152 | Chronology base; |
| 153 | if ((base = getBase()) != null) { |
| 154 | return base.getDateTimeMillis(year, monthOfYear, dayOfMonth, millisOfDay); |
| 155 | } |
| 156 | |
| 157 | FieldUtils.verifyValueBounds |
| 158 | (DateTimeFieldType.millisOfDay(), millisOfDay, 0, DateTimeConstants.MILLIS_PER_DAY); |
| 159 | return getDateMidnightMillis(year, monthOfYear, dayOfMonth) + millisOfDay; |
| 160 | } |
| 161 | |
| 162 | public long getDateTimeMillis( |
| 163 | int year, int monthOfYear, int dayOfMonth, |
| 164 | int hourOfDay, int minuteOfHour, int secondOfMinute, int millisOfSecond) |
| 165 | throws IllegalArgumentException { |
| 166 | Chronology base; |
| 167 | if ((base = getBase()) != null) { |
| 168 | return base.getDateTimeMillis(year, monthOfYear, dayOfMonth, |
| 169 | hourOfDay, minuteOfHour, secondOfMinute, millisOfSecond); |
| 170 | } |
| 171 | |
| 172 | FieldUtils.verifyValueBounds(DateTimeFieldType.hourOfDay(), hourOfDay, 0, 23); |
| 173 | FieldUtils.verifyValueBounds(DateTimeFieldType.minuteOfHour(), minuteOfHour, 0, 59); |
| 174 | FieldUtils.verifyValueBounds(DateTimeFieldType.secondOfMinute(), secondOfMinute, 0, 59); |
| 175 | FieldUtils.verifyValueBounds(DateTimeFieldType.millisOfSecond(), millisOfSecond, 0, 999); |
| 176 | |
| 177 | return getDateMidnightMillis(year, monthOfYear, dayOfMonth) |
| 178 | + hourOfDay * DateTimeConstants.MILLIS_PER_HOUR |
| 179 | + minuteOfHour * DateTimeConstants.MILLIS_PER_MINUTE |
| 180 | + secondOfMinute * DateTimeConstants.MILLIS_PER_SECOND |
| 181 | + millisOfSecond; |
| 182 | } |
| 183 | |
| 184 | public int getMinimumDaysInFirstWeek() { |
| 185 | return iMinDaysInFirstWeek; |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * Checks if this chronology instance equals another. |
| 190 | * |
| 191 | * @param obj the object to compare to |
| 192 | * @return true if equal |
| 193 | * @since 1.6 |
| 194 | */ |
| 195 | public boolean equals(Object obj) { |
| 196 | return super.equals(obj); |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * A suitable hash code for the chronology. |
| 201 | * |
| 202 | * @return the hash code |
| 203 | * @since 1.6 |
| 204 | */ |
| 205 | public int hashCode() { |
| 206 | return getClass().getName().hashCode() * 11 + getZone().hashCode() + getMinimumDaysInFirstWeek(); |
| 207 | } |
| 208 | |
| 209 | // Output |
| 210 | //----------------------------------------------------------------------- |
| 211 | /** |
| 212 | * Gets a debugging toString. |
| 213 | * |
| 214 | * @return a debugging string |
| 215 | */ |
| 216 | public String toString() { |
| 217 | StringBuffer sb = new StringBuffer(60); |
| 218 | String name = getClass().getName(); |
| 219 | int index = name.lastIndexOf('.'); |
| 220 | if (index >= 0) { |
| 221 | name = name.substring(index + 1); |
| 222 | } |
| 223 | sb.append(name); |
| 224 | sb.append('['); |
| 225 | DateTimeZone zone = getZone(); |
| 226 | if (zone != null) { |
| 227 | sb.append(zone.getID()); |
| 228 | } |
| 229 | if (getMinimumDaysInFirstWeek() != 4) { |
| 230 | sb.append(",mdfw="); |
| 231 | sb.append(getMinimumDaysInFirstWeek()); |
| 232 | } |
| 233 | sb.append(']'); |
| 234 | return sb.toString(); |
| 235 | } |
| 236 | |
| 237 | protected void assemble(Fields fields) { |
| 238 | // First copy fields that are the same for all Gregorian and Julian |
| 239 | // chronologies. |
| 240 | |
| 241 | fields.millis = cMillisField; |
| 242 | fields.seconds = cSecondsField; |
| 243 | fields.minutes = cMinutesField; |
| 244 | fields.hours = cHoursField; |
| 245 | fields.halfdays = cHalfdaysField; |
| 246 | fields.days = cDaysField; |
| 247 | fields.weeks = cWeeksField; |
| 248 | |
| 249 | fields.millisOfSecond = cMillisOfSecondField; |
| 250 | fields.millisOfDay = cMillisOfDayField; |
| 251 | fields.secondOfMinute = cSecondOfMinuteField; |
| 252 | fields.secondOfDay = cSecondOfDayField; |
| 253 | fields.minuteOfHour = cMinuteOfHourField; |
| 254 | fields.minuteOfDay = cMinuteOfDayField; |
| 255 | fields.hourOfDay = cHourOfDayField; |
| 256 | fields.hourOfHalfday = cHourOfHalfdayField; |
| 257 | fields.clockhourOfDay = cClockhourOfDayField; |
| 258 | fields.clockhourOfHalfday = cClockhourOfHalfdayField; |
| 259 | fields.halfdayOfDay = cHalfdayOfDayField; |
| 260 | |
| 261 | // Now create fields that have unique behavior for Gregorian and Julian |
| 262 | // chronologies. |
| 263 | |
| 264 | fields.year = new BasicYearDateTimeField(this); |
| 265 | fields.yearOfEra = new GJYearOfEraDateTimeField(fields.year, this); |
| 266 | |
| 267 | // Define one-based centuryOfEra and yearOfCentury. |
| 268 | DateTimeField field = new OffsetDateTimeField( |
| 269 | fields.yearOfEra, 99); |
| 270 | fields.centuryOfEra = new DividedDateTimeField( |
| 271 | field, DateTimeFieldType.centuryOfEra(), 100); |
| 272 | |
| 273 | field = new RemainderDateTimeField( |
| 274 | (DividedDateTimeField) fields.centuryOfEra); |
| 275 | fields.yearOfCentury = new OffsetDateTimeField( |
| 276 | field, DateTimeFieldType.yearOfCentury(), 1); |
| 277 | |
| 278 | fields.era = new GJEraDateTimeField(this); |
| 279 | fields.dayOfWeek = new GJDayOfWeekDateTimeField(this, fields.days); |
| 280 | fields.dayOfMonth = new BasicDayOfMonthDateTimeField(this, fields.days); |
| 281 | fields.dayOfYear = new BasicDayOfYearDateTimeField(this, fields.days); |
| 282 | fields.monthOfYear = new GJMonthOfYearDateTimeField(this); |
| 283 | fields.weekyear = new BasicWeekyearDateTimeField(this); |
| 284 | fields.weekOfWeekyear = new BasicWeekOfWeekyearDateTimeField(this, fields.weeks); |
| 285 | |
| 286 | field = new RemainderDateTimeField( |
| 287 | fields.weekyear, DateTimeFieldType.weekyearOfCentury(), 100); |
| 288 | fields.weekyearOfCentury = new OffsetDateTimeField( |
| 289 | field, DateTimeFieldType.weekyearOfCentury(), 1); |
| 290 | |
| 291 | // The remaining (imprecise) durations are available from the newly |
| 292 | // created datetime fields. |
| 293 | |
| 294 | fields.years = fields.year.getDurationField(); |
| 295 | fields.centuries = fields.centuryOfEra.getDurationField(); |
| 296 | fields.months = fields.monthOfYear.getDurationField(); |
| 297 | fields.weekyears = fields.weekyear.getDurationField(); |
| 298 | } |
| 299 | |
| 300 | //----------------------------------------------------------------------- |
| 301 | /** |
| 302 | * Get the number of days in the year. |
| 303 | * |
| 304 | * @return 366 |
| 305 | */ |
| 306 | int getDaysInYearMax() { |
| 307 | return 366; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * Get the number of days in the year. |
| 312 | * |
| 313 | * @param year the year to use |
| 314 | * @return 366 if a leap year, otherwise 365 |
| 315 | */ |
| 316 | int getDaysInYear(int year) { |
| 317 | return isLeapYear(year) ? 366 : 365; |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Get the number of weeks in the year. |
| 322 | * |
| 323 | * @param year the year to use |
| 324 | * @return number of weeks in the year |
| 325 | */ |
| 326 | int getWeeksInYear(int year) { |
| 327 | long firstWeekMillis1 = getFirstWeekOfYearMillis(year); |
| 328 | long firstWeekMillis2 = getFirstWeekOfYearMillis(year + 1); |
| 329 | return (int) ((firstWeekMillis2 - firstWeekMillis1) / DateTimeConstants.MILLIS_PER_WEEK); |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * Get the millis for the first week of a year. |
| 334 | * |
| 335 | * @param year the year to use |
| 336 | * @return millis |
| 337 | */ |
| 338 | long getFirstWeekOfYearMillis(int year) { |
| 339 | long jan1millis = getYearMillis(year); |
| 340 | int jan1dayOfWeek = getDayOfWeek(jan1millis); |
| 341 | |
| 342 | if (jan1dayOfWeek > (8 - iMinDaysInFirstWeek)) { |
| 343 | // First week is end of previous year because it doesn't have enough days. |
| 344 | return jan1millis + (8 - jan1dayOfWeek) |
| 345 | * (long)DateTimeConstants.MILLIS_PER_DAY; |
| 346 | } else { |
| 347 | // First week is start of this year because it has enough days. |
| 348 | return jan1millis - (jan1dayOfWeek - 1) |
| 349 | * (long)DateTimeConstants.MILLIS_PER_DAY; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | /** |
| 354 | * Get the milliseconds for the start of a year. |
| 355 | * |
| 356 | * @param year The year to use. |
| 357 | * @return millis from 1970-01-01T00:00:00Z |
| 358 | */ |
| 359 | long getYearMillis(int year) { |
| 360 | return getYearInfo(year).iFirstDayMillis; |
| 361 | } |
| 362 | |
| 363 | /** |
| 364 | * Get the milliseconds for the start of a month. |
| 365 | * |
| 366 | * @param year The year to use. |
| 367 | * @param month The month to use |
| 368 | * @return millis from 1970-01-01T00:00:00Z |
| 369 | */ |
| 370 | long getYearMonthMillis(int year, int month) { |
| 371 | long millis = getYearMillis(year); |
| 372 | millis += getTotalMillisByYearMonth(year, month); |
| 373 | return millis; |
| 374 | } |
| 375 | |
| 376 | /** |
| 377 | * Get the milliseconds for a particular date. |
| 378 | * |
| 379 | * @param year The year to use. |
| 380 | * @param month The month to use |
| 381 | * @param dayOfMonth The day of the month to use |
| 382 | * @return millis from 1970-01-01T00:00:00Z |
| 383 | */ |
| 384 | long getYearMonthDayMillis(int year, int month, int dayOfMonth) { |
| 385 | long millis = getYearMillis(year); |
| 386 | millis += getTotalMillisByYearMonth(year, month); |
| 387 | return millis + (dayOfMonth - 1) * (long)DateTimeConstants.MILLIS_PER_DAY; |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * @param instant millis from 1970-01-01T00:00:00Z |
| 392 | */ |
| 393 | int getYear(long instant) { |
| 394 | // Get an initial estimate of the year, and the millis value that |
| 395 | // represents the start of that year. Then verify estimate and fix if |
| 396 | // necessary. |
| 397 | |
| 398 | // Initial estimate uses values divided by two to avoid overflow. |
| 399 | long unitMillis = getAverageMillisPerYearDividedByTwo(); |
| 400 | long i2 = (instant >> 1) + getApproxMillisAtEpochDividedByTwo(); |
| 401 | if (i2 < 0) { |
| 402 | i2 = i2 - unitMillis + 1; |
| 403 | } |
| 404 | int year = (int) (i2 / unitMillis); |
| 405 | |
| 406 | long yearStart = getYearMillis(year); |
| 407 | long diff = instant - yearStart; |
| 408 | |
| 409 | if (diff < 0) { |
| 410 | year--; |
| 411 | } else if (diff >= DateTimeConstants.MILLIS_PER_DAY * 365L) { |
| 412 | // One year may need to be added to fix estimate. |
| 413 | long oneYear; |
| 414 | if (isLeapYear(year)) { |
| 415 | oneYear = DateTimeConstants.MILLIS_PER_DAY * 366L; |
| 416 | } else { |
| 417 | oneYear = DateTimeConstants.MILLIS_PER_DAY * 365L; |
| 418 | } |
| 419 | |
| 420 | yearStart += oneYear; |
| 421 | |
| 422 | if (yearStart <= instant) { |
| 423 | // Didn't go too far, so actually add one year. |
| 424 | year++; |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | return year; |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * @param millis from 1970-01-01T00:00:00Z |
| 433 | */ |
| 434 | int getMonthOfYear(long millis) { |
| 435 | return getMonthOfYear(millis, getYear(millis)); |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * @param millis from 1970-01-01T00:00:00Z |
| 440 | * @param year precalculated year of millis |
| 441 | */ |
| 442 | abstract int getMonthOfYear(long millis, int year); |
| 443 | |
| 444 | /** |
| 445 | * @param millis from 1970-01-01T00:00:00Z |
| 446 | */ |
| 447 | int getDayOfMonth(long millis) { |
| 448 | int year = getYear(millis); |
| 449 | int month = getMonthOfYear(millis, year); |
| 450 | return getDayOfMonth(millis, year, month); |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * @param millis from 1970-01-01T00:00:00Z |
| 455 | * @param year precalculated year of millis |
| 456 | */ |
| 457 | int getDayOfMonth(long millis, int year) { |
| 458 | int month = getMonthOfYear(millis, year); |
| 459 | return getDayOfMonth(millis, year, month); |
| 460 | } |
| 461 | |
| 462 | /** |
| 463 | * @param millis from 1970-01-01T00:00:00Z |
| 464 | * @param year precalculated year of millis |
| 465 | * @param month precalculated month of millis |
| 466 | */ |
| 467 | int getDayOfMonth(long millis, int year, int month) { |
| 468 | long dateMillis = getYearMillis(year); |
| 469 | dateMillis += getTotalMillisByYearMonth(year, month); |
| 470 | return (int) ((millis - dateMillis) / DateTimeConstants.MILLIS_PER_DAY) + 1; |
| 471 | } |
| 472 | |
| 473 | /** |
| 474 | * @param instant millis from 1970-01-01T00:00:00Z |
| 475 | */ |
| 476 | int getDayOfYear(long instant) { |
| 477 | return getDayOfYear(instant, getYear(instant)); |
| 478 | } |
| 479 | |
| 480 | /** |
| 481 | * @param instant millis from 1970-01-01T00:00:00Z |
| 482 | * @param year precalculated year of millis |
| 483 | */ |
| 484 | int getDayOfYear(long instant, int year) { |
| 485 | long yearStart = getYearMillis(year); |
| 486 | return (int) ((instant - yearStart) / DateTimeConstants.MILLIS_PER_DAY) + 1; |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * @param instant millis from 1970-01-01T00:00:00Z |
| 491 | */ |
| 492 | int getWeekyear(long instant) { |
| 493 | int year = getYear(instant); |
| 494 | int week = getWeekOfWeekyear(instant, year); |
| 495 | if (week == 1) { |
| 496 | return getYear(instant + DateTimeConstants.MILLIS_PER_WEEK); |
| 497 | } else if (week > 51) { |
| 498 | return getYear(instant - (2 * DateTimeConstants.MILLIS_PER_WEEK)); |
| 499 | } else { |
| 500 | return year; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | /** |
| 505 | * @param instant millis from 1970-01-01T00:00:00Z |
| 506 | */ |
| 507 | int getWeekOfWeekyear(long instant) { |
| 508 | return getWeekOfWeekyear(instant, getYear(instant)); |
| 509 | } |
| 510 | |
| 511 | /** |
| 512 | * @param instant millis from 1970-01-01T00:00:00Z |
| 513 | * @param year precalculated year of millis |
| 514 | */ |
| 515 | int getWeekOfWeekyear(long instant, int year) { |
| 516 | long firstWeekMillis1 = getFirstWeekOfYearMillis(year); |
| 517 | if (instant < firstWeekMillis1) { |
| 518 | return getWeeksInYear(year - 1); |
| 519 | } |
| 520 | long firstWeekMillis2 = getFirstWeekOfYearMillis(year + 1); |
| 521 | if (instant >= firstWeekMillis2) { |
| 522 | return 1; |
| 523 | } |
| 524 | return (int) ((instant - firstWeekMillis1) / DateTimeConstants.MILLIS_PER_WEEK) + 1; |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * @param instant millis from 1970-01-01T00:00:00Z |
| 529 | */ |
| 530 | int getDayOfWeek(long instant) { |
| 531 | // 1970-01-01 is day of week 4, Thursday. |
| 532 | |
| 533 | long daysSince19700101; |
| 534 | if (instant >= 0) { |
| 535 | daysSince19700101 = instant / DateTimeConstants.MILLIS_PER_DAY; |
| 536 | } else { |
| 537 | daysSince19700101 = (instant - (DateTimeConstants.MILLIS_PER_DAY - 1)) |
| 538 | / DateTimeConstants.MILLIS_PER_DAY; |
| 539 | if (daysSince19700101 < -3) { |
| 540 | return 7 + (int) ((daysSince19700101 + 4) % 7); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | return 1 + (int) ((daysSince19700101 + 3) % 7); |
| 545 | } |
| 546 | |
| 547 | /** |
| 548 | * @param instant millis from 1970-01-01T00:00:00Z |
| 549 | */ |
| 550 | int getMillisOfDay(long instant) { |
| 551 | if (instant >= 0) { |
| 552 | return (int) (instant % DateTimeConstants.MILLIS_PER_DAY); |
| 553 | } else { |
| 554 | return (DateTimeConstants.MILLIS_PER_DAY - 1) |
| 555 | + (int) ((instant + 1) % DateTimeConstants.MILLIS_PER_DAY); |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | /** |
| 560 | * Gets the maximum number of days in any month. |
| 561 | * |
| 562 | * @return 31 |
| 563 | */ |
| 564 | int getDaysInMonthMax() { |
| 565 | return 31; |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * Gets the maximum number of days in the month specified by the instant. |
| 570 | * |
| 571 | * @param instant millis from 1970-01-01T00:00:00Z |
| 572 | * @return the maximum number of days in the month |
| 573 | */ |
| 574 | int getDaysInMonthMax(long instant) { |
| 575 | int thisYear = getYear(instant); |
| 576 | int thisMonth = getMonthOfYear(instant, thisYear); |
| 577 | return getDaysInYearMonth(thisYear, thisMonth); |
| 578 | } |
| 579 | |
| 580 | /** |
| 581 | * Gets the maximum number of days in the month specified by the instant. |
| 582 | * The value represents what the user is trying to set, and can be |
| 583 | * used to optimise this method. |
| 584 | * |
| 585 | * @param instant millis from 1970-01-01T00:00:00Z |
| 586 | * @param value the value being set |
| 587 | * @return the maximum number of days in the month |
| 588 | */ |
| 589 | int getDaysInMonthMaxForSet(long instant, int value) { |
| 590 | return getDaysInMonthMax(instant); |
| 591 | } |
| 592 | |
| 593 | //----------------------------------------------------------------------- |
| 594 | /** |
| 595 | * Gets the milliseconds for a date at midnight. |
| 596 | * |
| 597 | * @param year the year |
| 598 | * @param monthOfYear the month |
| 599 | * @param dayOfMonth the day |
| 600 | * @return the milliseconds |
| 601 | */ |
| 602 | long getDateMidnightMillis(int year, int monthOfYear, int dayOfMonth) { |
| 603 | FieldUtils.verifyValueBounds(DateTimeFieldType.year(), year, getMinYear(), getMaxYear()); |
| 604 | FieldUtils.verifyValueBounds(DateTimeFieldType.monthOfYear(), monthOfYear, 1, getMaxMonth(year)); |
| 605 | FieldUtils.verifyValueBounds(DateTimeFieldType.dayOfMonth(), dayOfMonth, 1, getDaysInYearMonth(year, monthOfYear)); |
| 606 | return getYearMonthDayMillis(year, monthOfYear, dayOfMonth); |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * Gets the difference between the two instants in years. |
| 611 | * |
| 612 | * @param minuendInstant the first instant |
| 613 | * @param subtrahendInstant the second instant |
| 614 | * @return the difference |
| 615 | */ |
| 616 | abstract long getYearDifference(long minuendInstant, long subtrahendInstant); |
| 617 | |
| 618 | /** |
| 619 | * Is the specified year a leap year? |
| 620 | * |
| 621 | * @param year the year to test |
| 622 | * @return true if leap |
| 623 | */ |
| 624 | abstract boolean isLeapYear(int year); |
| 625 | |
| 626 | /** |
| 627 | * Gets the number of days in the specified month and year. |
| 628 | * |
| 629 | * @param year the year |
| 630 | * @param month the month |
| 631 | * @return the number of days |
| 632 | */ |
| 633 | abstract int getDaysInYearMonth(int year, int month); |
| 634 | |
| 635 | /** |
| 636 | * Gets the maximum days in the specified month. |
| 637 | * |
| 638 | * @param month the month |
| 639 | * @return the max days |
| 640 | */ |
| 641 | abstract int getDaysInMonthMax(int month); |
| 642 | |
| 643 | /** |
| 644 | * Gets the total number of millis elapsed in this year at the start |
| 645 | * of the specified month, such as zero for month 1. |
| 646 | * |
| 647 | * @param year the year |
| 648 | * @param month the month |
| 649 | * @return the elapsed millis at the start of the month |
| 650 | */ |
| 651 | abstract long getTotalMillisByYearMonth(int year, int month); |
| 652 | |
| 653 | /** |
| 654 | * Gets the millisecond value of the first day of the year. |
| 655 | * |
| 656 | * @return the milliseconds for the first of the year |
| 657 | */ |
| 658 | abstract long calculateFirstDayOfYearMillis(int year); |
| 659 | |
| 660 | /** |
| 661 | * Gets the minimum supported year. |
| 662 | * |
| 663 | * @return the year |
| 664 | */ |
| 665 | abstract int getMinYear(); |
| 666 | |
| 667 | /** |
| 668 | * Gets the maximum supported year. |
| 669 | * |
| 670 | * @return the year |
| 671 | */ |
| 672 | abstract int getMaxYear(); |
| 673 | |
| 674 | /** |
| 675 | * Gets the maximum month for the specified year. |
| 676 | * This implementation calls getMaxMonth(). |
| 677 | * |
| 678 | * @param year the year |
| 679 | * @return the maximum month value |
| 680 | */ |
| 681 | int getMaxMonth(int year) { |
| 682 | return getMaxMonth(); |
| 683 | } |
| 684 | |
| 685 | /** |
| 686 | * Gets the maximum number of months. |
| 687 | * |
| 688 | * @return 12 |
| 689 | */ |
| 690 | int getMaxMonth() { |
| 691 | return 12; |
| 692 | } |
| 693 | |
| 694 | /** |
| 695 | * Gets an average value for the milliseconds per year. |
| 696 | * |
| 697 | * @return the millis per year |
| 698 | */ |
| 699 | abstract long getAverageMillisPerYear(); |
| 700 | |
| 701 | /** |
| 702 | * Gets an average value for the milliseconds per year, divided by two. |
| 703 | * |
| 704 | * @return the millis per year divided by two |
| 705 | */ |
| 706 | abstract long getAverageMillisPerYearDividedByTwo(); |
| 707 | |
| 708 | /** |
| 709 | * Gets an average value for the milliseconds per month. |
| 710 | * |
| 711 | * @return the millis per month |
| 712 | */ |
| 713 | abstract long getAverageMillisPerMonth(); |
| 714 | |
| 715 | /** |
| 716 | * Returns a constant representing the approximate number of milliseconds |
| 717 | * elapsed from year 0 of this chronology, divided by two. This constant |
| 718 | * <em>must</em> be defined as: |
| 719 | * <pre> |
| 720 | * (yearAtEpoch * averageMillisPerYear + millisOfYearAtEpoch) / 2 |
| 721 | * </pre> |
| 722 | * where epoch is 1970-01-01 (Gregorian). |
| 723 | */ |
| 724 | abstract long getApproxMillisAtEpochDividedByTwo(); |
| 725 | |
| 726 | /** |
| 727 | * Sets the year from an instant and year. |
| 728 | * |
| 729 | * @param instant millis from 1970-01-01T00:00:00Z |
| 730 | * @param year the year to set |
| 731 | * @return the updated millis |
| 732 | */ |
| 733 | abstract long setYear(long instant, int year); |
| 734 | |
| 735 | //----------------------------------------------------------------------- |
| 736 | // Although accessed by multiple threads, this method doesn't need to be synchronized. |
| 737 | private YearInfo getYearInfo(int year) { |
| 738 | YearInfo info = iYearInfoCache[year & CACHE_MASK]; |
| 739 | if (info == null || info.iYear != year) { |
| 740 | info = new YearInfo(year, calculateFirstDayOfYearMillis(year)); |
| 741 | iYearInfoCache[year & CACHE_MASK] = info; |
| 742 | } |
| 743 | return info; |
| 744 | } |
| 745 | |
| 746 | private static class HalfdayField extends PreciseDateTimeField { |
| 747 | private static final long serialVersionUID = 581601443656929254L; |
| 748 | |
| 749 | HalfdayField() { |
| 750 | super(DateTimeFieldType.halfdayOfDay(), cHalfdaysField, cDaysField); |
| 751 | } |
| 752 | |
| 753 | public String getAsText(int fieldValue, Locale locale) { |
| 754 | return GJLocaleSymbols.forLocale(locale).halfdayValueToText(fieldValue); |
| 755 | } |
| 756 | |
| 757 | public long set(long millis, String text, Locale locale) { |
| 758 | return set(millis, GJLocaleSymbols.forLocale(locale).halfdayTextToValue(text)); |
| 759 | } |
| 760 | |
| 761 | public int getMaximumTextLength(Locale locale) { |
| 762 | return GJLocaleSymbols.forLocale(locale).getHalfdayMaxTextLength(); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | private static class YearInfo { |
| 767 | public final int iYear; |
| 768 | public final long iFirstDayMillis; |
| 769 | |
| 770 | YearInfo(int year, long firstDayMillis) { |
| 771 | iYear = year; |
| 772 | iFirstDayMillis = firstDayMillis; |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | } |