55 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 */
57 package java.time.chrono;
58
59 import static java.time.chrono.MinguoChronology.YEARS_DIFFERENCE;
60 import static java.time.temporal.ChronoField.DAY_OF_MONTH;
61 import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
62 import static java.time.temporal.ChronoField.YEAR;
63
64 import java.io.DataInput;
65 import java.io.DataOutput;
66 import java.io.IOException;
67 import java.io.Serializable;
68 import java.time.Clock;
69 import java.time.DateTimeException;
70 import java.time.LocalDate;
71 import java.time.LocalTime;
72 import java.time.Period;
73 import java.time.ZoneId;
74 import java.time.temporal.ChronoField;
75 import java.time.temporal.TemporalQuery;
76 import java.time.temporal.TemporalAccessor;
77 import java.time.temporal.TemporalAdjuster;
78 import java.time.temporal.TemporalAmount;
79 import java.time.temporal.TemporalField;
80 import java.time.temporal.TemporalUnit;
81 import java.time.temporal.ValueRange;
82 import java.util.Objects;
83
84 /**
85 * A date in the Minguo calendar system.
86 * <p>
87 * This date operates using the {@linkplain MinguoChronology Minguo calendar}.
88 * This calendar system is primarily used in the Republic of China, often known as Taiwan.
89 * Dates are aligned such that {@code 0001-01-01 (Minguo)} is {@code 1912-01-01 (ISO)}.
90 *
91 * <h3>Specification for implementors</h3>
92 * This class is immutable and thread-safe.
93 *
94 * @since 1.8
95 */
96 public final class MinguoDate
97 extends ChronoDateImpl<MinguoDate>
98 implements ChronoLocalDate<MinguoDate>, Serializable {
99
100 /**
188 * @param temporal the temporal object to convert, not null
189 * @return the date in Minguo calendar system, not null
190 * @throws DateTimeException if unable to convert to a {@code MinguoDate}
191 */
192 public static MinguoDate from(TemporalAccessor temporal) {
193 return MinguoChronology.INSTANCE.date(temporal);
194 }
195
196 //-----------------------------------------------------------------------
197 /**
198 * Creates an instance from an ISO date.
199 *
200 * @param isoDate the standard local date, validated not null
201 */
202 MinguoDate(LocalDate isoDate) {
203 Objects.requireNonNull(isoDate, "isoDate");
204 this.isoDate = isoDate;
205 }
206
207 //-----------------------------------------------------------------------
208 @Override
209 public MinguoChronology getChronology() {
210 return MinguoChronology.INSTANCE;
211 }
212
213 @Override
214 public int lengthOfMonth() {
215 return isoDate.lengthOfMonth();
216 }
217
218 @Override
219 public ValueRange range(TemporalField field) {
220 if (field instanceof ChronoField) {
221 if (isSupported(field)) {
222 ChronoField f = (ChronoField) field;
223 switch (f) {
224 case DAY_OF_MONTH:
225 case DAY_OF_YEAR:
226 case ALIGNED_WEEK_OF_MONTH:
227 return isoDate.range(field);
228 case YEAR_OF_ERA: {
229 ValueRange range = YEAR.range();
230 long max = (getProlepticYear() <= 0 ? -range.getMinimum() + 1 + YEARS_DIFFERENCE : range.getMaximum() - YEARS_DIFFERENCE);
231 return ValueRange.of(1, max);
232 }
233 }
234 return getChronology().range(f);
235 }
236 throw new DateTimeException("Unsupported field: " + field.getName());
237 }
238 return field.rangeRefinedBy(this);
239 }
240
241 @Override
242 public long getLong(TemporalField field) {
243 if (field instanceof ChronoField) {
244 switch ((ChronoField) field) {
245 case YEAR_OF_ERA: {
246 int prolepticYear = getProlepticYear();
247 return (prolepticYear >= 1 ? prolepticYear : 1 - prolepticYear);
248 }
249 case YEAR:
250 return getProlepticYear();
251 case ERA:
252 return (getProlepticYear() >= 1 ? 1 : 0);
253 }
254 return isoDate.getLong(field);
255 }
256 return field.getFrom(this);
257 }
258
259 private int getProlepticYear() {
260 return isoDate.getYear() - YEARS_DIFFERENCE;
261 }
262
263 //-----------------------------------------------------------------------
264 @Override
265 public MinguoDate with(TemporalField field, long newValue) {
266 if (field instanceof ChronoField) {
267 ChronoField f = (ChronoField) field;
268 if (getLong(f) == newValue) {
269 return this;
270 }
271 switch (f) {
272 case YEAR_OF_ERA:
273 case YEAR:
274 case ERA: {
275 f.checkValidValue(newValue);
276 int nvalue = (int) newValue;
277 switch (f) {
278 case YEAR_OF_ERA:
279 return with(isoDate.withYear(getProlepticYear() >= 1 ? nvalue + YEARS_DIFFERENCE : (1 - nvalue) + YEARS_DIFFERENCE));
280 case YEAR:
281 return with(isoDate.withYear(nvalue + YEARS_DIFFERENCE));
282 case ERA:
283 return with(isoDate.withYear((1 - getProlepticYear()) + YEARS_DIFFERENCE));
284 }
285 }
286 }
287 return with(isoDate.with(field, newValue));
288 }
289 return (MinguoDate) ChronoLocalDate.super.with(field, newValue);
290 }
291
292 /**
293 * {@inheritDoc}
294 * @throws DateTimeException {@inheritDoc}
295 * @throws ArithmeticException {@inheritDoc}
296 */
297 @Override
298 public MinguoDate with(TemporalAdjuster adjuster) {
299 return (MinguoDate)super.with(adjuster);
300 }
301
302 /**
303 * {@inheritDoc}
304 * @throws DateTimeException {@inheritDoc}
305 * @throws ArithmeticException {@inheritDoc}
306 */
307 @Override
308 public MinguoDate plus(TemporalAmount amount) {
309 return (MinguoDate)super.plus(amount);
310 }
311
312 /**
313 * {@inheritDoc}
314 * @throws DateTimeException {@inheritDoc}
315 * @throws ArithmeticException {@inheritDoc}
316 */
317 @Override
318 public MinguoDate minus(TemporalAmount amount) {
319 return (MinguoDate)super.minus(amount);
320 }
321
322 //-----------------------------------------------------------------------
323 @Override
324 MinguoDate plusYears(long years) {
325 return with(isoDate.plusYears(years));
326 }
327
328 @Override
329 MinguoDate plusMonths(long months) {
330 return with(isoDate.plusMonths(months));
331 }
332
333 @Override
334 MinguoDate plusDays(long days) {
335 return with(isoDate.plusDays(days));
336 }
337
338 @Override
339 public MinguoDate plus(long amountToAdd, TemporalUnit unit) {
340 return (MinguoDate)super.plus(amountToAdd, unit);
341 }
342
343 @Override
344 public MinguoDate minus(long amountToAdd, TemporalUnit unit) {
345 return (MinguoDate)super.minus(amountToAdd, unit);
346 }
347
348 @Override
349 MinguoDate plusWeeks(long weeksToAdd) {
350 return (MinguoDate)super.plusWeeks(weeksToAdd);
351 }
352
353 @Override
354 MinguoDate minusYears(long yearsToSubtract) {
355 return (MinguoDate)super.minusYears(yearsToSubtract);
356 }
357
358 @Override
359 MinguoDate minusMonths(long monthsToSubtract) {
360 return (MinguoDate)super.minusMonths(monthsToSubtract);
361 }
362
363 @Override
364 MinguoDate minusWeeks(long weeksToSubtract) {
365 return (MinguoDate)super.minusWeeks(weeksToSubtract);
366 }
367
368 @Override
369 MinguoDate minusDays(long daysToSubtract) {
370 return (MinguoDate)super.minusDays(daysToSubtract);
371 }
372
373 private MinguoDate with(LocalDate newDate) {
374 return (newDate.equals(isoDate) ? this : new MinguoDate(newDate));
375 }
376
377 @Override // for javadoc and covariant return type
378 public final ChronoLocalDateTime<MinguoDate> atTime(LocalTime localTime) {
379 return (ChronoLocalDateTime<MinguoDate>)super.atTime(localTime);
380 }
381
382 @Override
383 public Period periodUntil(ChronoLocalDate<?> endDate) {
384 return isoDate.periodUntil(endDate);
385 }
386
387 @Override // override for performance
388 public long toEpochDay() {
389 return isoDate.toEpochDay();
390 }
391
392 //-------------------------------------------------------------------------
393 @Override // override for performance
394 public boolean equals(Object obj) {
395 if (this == obj) {
396 return true;
397 }
398 if (obj instanceof MinguoDate) {
399 MinguoDate otherDate = (MinguoDate) obj;
402 return false;
403 }
404
405 @Override // override for performance
406 public int hashCode() {
407 return getChronology().getId().hashCode() ^ isoDate.hashCode();
408 }
409
410 //-----------------------------------------------------------------------
411 private Object writeReplace() {
412 return new Ser(Ser.MINGUO_DATE_TYPE, this);
413 }
414
415 void writeExternal(DataOutput out) throws IOException {
416 // MinguoChronology is implicit in the MINGUO_DATE_TYPE
417 out.writeInt(get(YEAR));
418 out.writeByte(get(MONTH_OF_YEAR));
419 out.writeByte(get(DAY_OF_MONTH));
420 }
421
422 static ChronoLocalDate readExternal(DataInput in) throws IOException {
423 int year = in.readInt();
424 int month = in.readByte();
425 int dayOfMonth = in.readByte();
426 return MinguoChronology.INSTANCE.date(year, month, dayOfMonth);
427 }
428
429 }
|
55 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 */
57 package java.time.chrono;
58
59 import static java.time.chrono.MinguoChronology.YEARS_DIFFERENCE;
60 import static java.time.temporal.ChronoField.DAY_OF_MONTH;
61 import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
62 import static java.time.temporal.ChronoField.YEAR;
63
64 import java.io.DataInput;
65 import java.io.DataOutput;
66 import java.io.IOException;
67 import java.io.Serializable;
68 import java.time.Clock;
69 import java.time.DateTimeException;
70 import java.time.LocalDate;
71 import java.time.LocalTime;
72 import java.time.Period;
73 import java.time.ZoneId;
74 import java.time.temporal.ChronoField;
75 import java.time.temporal.TemporalAccessor;
76 import java.time.temporal.TemporalAdjuster;
77 import java.time.temporal.TemporalAmount;
78 import java.time.temporal.TemporalField;
79 import java.time.temporal.TemporalQuery;
80 import java.time.temporal.TemporalUnit;
81 import java.time.temporal.UnsupportedTemporalTypeException;
82 import java.time.temporal.ValueRange;
83 import java.util.Objects;
84
85 /**
86 * A date in the Minguo calendar system.
87 * <p>
88 * This date operates using the {@linkplain MinguoChronology Minguo calendar}.
89 * This calendar system is primarily used in the Republic of China, often known as Taiwan.
90 * Dates are aligned such that {@code 0001-01-01 (Minguo)} is {@code 1912-01-01 (ISO)}.
91 *
92 * <h3>Specification for implementors</h3>
93 * This class is immutable and thread-safe.
94 *
95 * @since 1.8
96 */
97 public final class MinguoDate
98 extends ChronoDateImpl<MinguoDate>
99 implements ChronoLocalDate<MinguoDate>, Serializable {
100
101 /**
189 * @param temporal the temporal object to convert, not null
190 * @return the date in Minguo calendar system, not null
191 * @throws DateTimeException if unable to convert to a {@code MinguoDate}
192 */
193 public static MinguoDate from(TemporalAccessor temporal) {
194 return MinguoChronology.INSTANCE.date(temporal);
195 }
196
197 //-----------------------------------------------------------------------
198 /**
199 * Creates an instance from an ISO date.
200 *
201 * @param isoDate the standard local date, validated not null
202 */
203 MinguoDate(LocalDate isoDate) {
204 Objects.requireNonNull(isoDate, "isoDate");
205 this.isoDate = isoDate;
206 }
207
208 //-----------------------------------------------------------------------
209 /**
210 * Gets the chronology of this date, which is the Minguo calendar system.
211 * <p>
212 * The {@code Chronology} represents the calendar system in use.
213 * The era and other fields in {@link ChronoField} are defined by the chronology.
214 *
215 * @return the Minguo chronology, not null
216 */
217 @Override
218 public MinguoChronology getChronology() {
219 return MinguoChronology.INSTANCE;
220 }
221
222 /**
223 * Gets the era applicable at this date.
224 * <p>
225 * The Minguo calendar system has two eras, 'ROC' and 'BEFORE_ROC',
226 * defined by {@link MinguoEra}.
227 *
228 * @return the era applicable at this date, not null
229 */
230 @Override
231 public MinguoEra getEra() {
232 return (getProlepticYear() >= 1 ? MinguoEra.ROC : MinguoEra.BEFORE_ROC);
233 }
234
235 /**
236 * Returns the length of the month represented by this date.
237 * <p>
238 * This returns the length of the month in days.
239 * Month lengths match those of the ISO calendar system.
240 *
241 * @return the length of the month in days
242 */
243 @Override
244 public int lengthOfMonth() {
245 return isoDate.lengthOfMonth();
246 }
247
248 //-----------------------------------------------------------------------
249 @Override
250 public ValueRange range(TemporalField field) {
251 if (field instanceof ChronoField) {
252 if (isSupported(field)) {
253 ChronoField f = (ChronoField) field;
254 switch (f) {
255 case DAY_OF_MONTH:
256 case DAY_OF_YEAR:
257 case ALIGNED_WEEK_OF_MONTH:
258 return isoDate.range(field);
259 case YEAR_OF_ERA: {
260 ValueRange range = YEAR.range();
261 long max = (getProlepticYear() <= 0 ? -range.getMinimum() + 1 + YEARS_DIFFERENCE : range.getMaximum() - YEARS_DIFFERENCE);
262 return ValueRange.of(1, max);
263 }
264 }
265 return getChronology().range(f);
266 }
267 throw new UnsupportedTemporalTypeException("Unsupported field: " + field.getName());
268 }
269 return field.rangeRefinedBy(this);
270 }
271
272 @Override
273 public long getLong(TemporalField field) {
274 if (field instanceof ChronoField) {
275 switch ((ChronoField) field) {
276 case PROLEPTIC_MONTH:
277 return getProlepticMonth();
278 case YEAR_OF_ERA: {
279 int prolepticYear = getProlepticYear();
280 return (prolepticYear >= 1 ? prolepticYear : 1 - prolepticYear);
281 }
282 case YEAR:
283 return getProlepticYear();
284 case ERA:
285 return (getProlepticYear() >= 1 ? 1 : 0);
286 }
287 return isoDate.getLong(field);
288 }
289 return field.getFrom(this);
290 }
291
292 private long getProlepticMonth() {
293 return getProlepticYear() * 12L + isoDate.getMonthValue() - 1;
294 }
295
296 private int getProlepticYear() {
297 return isoDate.getYear() - YEARS_DIFFERENCE;
298 }
299
300 //-----------------------------------------------------------------------
301 @Override
302 public MinguoDate with(TemporalField field, long newValue) {
303 if (field instanceof ChronoField) {
304 ChronoField f = (ChronoField) field;
305 if (getLong(f) == newValue) {
306 return this;
307 }
308 switch (f) {
309 case PROLEPTIC_MONTH:
310 getChronology().range(f).checkValidValue(newValue, f);
311 return plusMonths(newValue - getProlepticMonth());
312 case YEAR_OF_ERA:
313 case YEAR:
314 case ERA: {
315 int nvalue = getChronology().range(f).checkValidIntValue(newValue, f);
316 switch (f) {
317 case YEAR_OF_ERA:
318 return with(isoDate.withYear(getProlepticYear() >= 1 ? nvalue + YEARS_DIFFERENCE : (1 - nvalue) + YEARS_DIFFERENCE));
319 case YEAR:
320 return with(isoDate.withYear(nvalue + YEARS_DIFFERENCE));
321 case ERA:
322 return with(isoDate.withYear((1 - getProlepticYear()) + YEARS_DIFFERENCE));
323 }
324 }
325 }
326 return with(isoDate.with(field, newValue));
327 }
328 return ChronoLocalDate.super.with(field, newValue);
329 }
330
331 /**
332 * {@inheritDoc}
333 * @throws DateTimeException {@inheritDoc}
334 * @throws ArithmeticException {@inheritDoc}
335 */
336 @Override
337 public MinguoDate with(TemporalAdjuster adjuster) {
338 return super.with(adjuster);
339 }
340
341 /**
342 * {@inheritDoc}
343 * @throws DateTimeException {@inheritDoc}
344 * @throws ArithmeticException {@inheritDoc}
345 */
346 @Override
347 public MinguoDate plus(TemporalAmount amount) {
348 return super.plus(amount);
349 }
350
351 /**
352 * {@inheritDoc}
353 * @throws DateTimeException {@inheritDoc}
354 * @throws ArithmeticException {@inheritDoc}
355 */
356 @Override
357 public MinguoDate minus(TemporalAmount amount) {
358 return super.minus(amount);
359 }
360
361 //-----------------------------------------------------------------------
362 @Override
363 MinguoDate plusYears(long years) {
364 return with(isoDate.plusYears(years));
365 }
366
367 @Override
368 MinguoDate plusMonths(long months) {
369 return with(isoDate.plusMonths(months));
370 }
371
372 @Override
373 MinguoDate plusDays(long days) {
374 return with(isoDate.plusDays(days));
375 }
376
377 @Override
378 public MinguoDate plus(long amountToAdd, TemporalUnit unit) {
379 return super.plus(amountToAdd, unit);
380 }
381
382 @Override
383 public MinguoDate minus(long amountToAdd, TemporalUnit unit) {
384 return super.minus(amountToAdd, unit);
385 }
386
387 @Override
388 MinguoDate plusWeeks(long weeksToAdd) {
389 return super.plusWeeks(weeksToAdd);
390 }
391
392 @Override
393 MinguoDate minusYears(long yearsToSubtract) {
394 return super.minusYears(yearsToSubtract);
395 }
396
397 @Override
398 MinguoDate minusMonths(long monthsToSubtract) {
399 return super.minusMonths(monthsToSubtract);
400 }
401
402 @Override
403 MinguoDate minusWeeks(long weeksToSubtract) {
404 return super.minusWeeks(weeksToSubtract);
405 }
406
407 @Override
408 MinguoDate minusDays(long daysToSubtract) {
409 return super.minusDays(daysToSubtract);
410 }
411
412 private MinguoDate with(LocalDate newDate) {
413 return (newDate.equals(isoDate) ? this : new MinguoDate(newDate));
414 }
415
416 @Override // for javadoc and covariant return type
417 public final ChronoLocalDateTime<MinguoDate> atTime(LocalTime localTime) {
418 return super.atTime(localTime);
419 }
420
421 @Override
422 public Period periodUntil(ChronoLocalDate<?> endDate) {
423 return isoDate.periodUntil(endDate);
424 }
425
426 @Override // override for performance
427 public long toEpochDay() {
428 return isoDate.toEpochDay();
429 }
430
431 //-------------------------------------------------------------------------
432 @Override // override for performance
433 public boolean equals(Object obj) {
434 if (this == obj) {
435 return true;
436 }
437 if (obj instanceof MinguoDate) {
438 MinguoDate otherDate = (MinguoDate) obj;
441 return false;
442 }
443
444 @Override // override for performance
445 public int hashCode() {
446 return getChronology().getId().hashCode() ^ isoDate.hashCode();
447 }
448
449 //-----------------------------------------------------------------------
450 private Object writeReplace() {
451 return new Ser(Ser.MINGUO_DATE_TYPE, this);
452 }
453
454 void writeExternal(DataOutput out) throws IOException {
455 // MinguoChronology is implicit in the MINGUO_DATE_TYPE
456 out.writeInt(get(YEAR));
457 out.writeByte(get(MONTH_OF_YEAR));
458 out.writeByte(get(DAY_OF_MONTH));
459 }
460
461 static ChronoLocalDate<?> readExternal(DataInput in) throws IOException {
462 int year = in.readInt();
463 int month = in.readByte();
464 int dayOfMonth = in.readByte();
465 return MinguoChronology.INSTANCE.date(year, month, dayOfMonth);
466 }
467
468 }
|