| /* |
| * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * * Neither the name of JSR-310 nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package java.time.chrono; |
| |
| import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH; |
| import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_YEAR; |
| import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_MONTH; |
| import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_YEAR; |
| import static java.time.temporal.ChronoField.DAY_OF_MONTH; |
| import static java.time.temporal.ChronoField.MONTH_OF_YEAR; |
| import static java.time.temporal.ChronoField.YEAR; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.io.InvalidObjectException; |
| import java.io.ObjectInputStream; |
| import java.io.Serializable; |
| import java.time.Clock; |
| import java.time.DateTimeException; |
| import java.time.LocalDate; |
| import java.time.LocalTime; |
| import java.time.Period; |
| import java.time.ZoneId; |
| import java.time.temporal.ChronoField; |
| import java.time.temporal.TemporalAccessor; |
| import java.time.temporal.TemporalAdjuster; |
| import java.time.temporal.TemporalAmount; |
| import java.time.temporal.TemporalField; |
| import java.time.temporal.TemporalQuery; |
| import java.time.temporal.TemporalUnit; |
| import java.time.temporal.UnsupportedTemporalTypeException; |
| import java.time.temporal.ValueRange; |
| import java.util.Calendar; |
| import java.util.Objects; |
| |
| import sun.util.calendar.CalendarDate; |
| import sun.util.calendar.LocalGregorianCalendar; |
| |
| // Android-changed: removed ValueBased paragraph. |
| /** |
| * A date in the Japanese Imperial calendar system. |
| * <p> |
| * This date operates using the {@linkplain JapaneseChronology Japanese Imperial calendar}. |
| * This calendar system is primarily used in Japan. |
| * <p> |
| * The Japanese Imperial calendar system is the same as the ISO calendar system |
| * apart from the era-based year numbering. The proleptic-year is defined to be |
| * equal to the ISO proleptic-year. |
| * <p> |
| * Japan introduced the Gregorian calendar starting with Meiji 6. |
| * Only Meiji and later eras are supported; |
| * dates before Meiji 6, January 1 are not supported. |
| * <p> |
| * For example, the Japanese year "Heisei 24" corresponds to ISO year "2012".<br> |
| * Calling {@code japaneseDate.get(YEAR_OF_ERA)} will return 24.<br> |
| * Calling {@code japaneseDate.get(YEAR)} will return 2012.<br> |
| * Calling {@code japaneseDate.get(ERA)} will return 2, corresponding to |
| * {@code JapaneseChronology.ERA_HEISEI}.<br> |
| * |
| * @implSpec |
| * This class is immutable and thread-safe. |
| * |
| * @since 1.8 |
| */ |
| public final class JapaneseDate |
| extends ChronoLocalDateImpl<JapaneseDate> |
| implements ChronoLocalDate, Serializable { |
| |
| /** |
| * Serialization version. |
| */ |
| @java.io.Serial |
| private static final long serialVersionUID = -305327627230580483L; |
| |
| /** |
| * The underlying ISO local date. |
| */ |
| private final transient LocalDate isoDate; |
| /** |
| * The JapaneseEra of this date. |
| */ |
| private final transient JapaneseEra era; |
| /** |
| * The Japanese imperial calendar year of this date. |
| */ |
| private final transient int yearOfEra; |
| |
| /** |
| * The first day supported by the JapaneseChronology is Meiji 6, January 1st. |
| */ |
| static final LocalDate MEIJI_6_ISODATE = LocalDate.of(1873, 1, 1); |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains the current {@code JapaneseDate} from the system clock in the default time-zone. |
| * <p> |
| * This will query the {@link Clock#systemDefaultZone() system clock} in the default |
| * time-zone to obtain the current date. |
| * <p> |
| * Using this method will prevent the ability to use an alternate clock for testing |
| * because the clock is hard-coded. |
| * |
| * @return the current date using the system clock and default time-zone, not null |
| */ |
| public static JapaneseDate now() { |
| return now(Clock.systemDefaultZone()); |
| } |
| |
| /** |
| * Obtains the current {@code JapaneseDate} from the system clock in the specified time-zone. |
| * <p> |
| * This will query the {@link Clock#system(ZoneId) system clock} to obtain the current date. |
| * Specifying the time-zone avoids dependence on the default time-zone. |
| * <p> |
| * Using this method will prevent the ability to use an alternate clock for testing |
| * because the clock is hard-coded. |
| * |
| * @param zone the zone ID to use, not null |
| * @return the current date using the system clock, not null |
| */ |
| public static JapaneseDate now(ZoneId zone) { |
| return now(Clock.system(zone)); |
| } |
| |
| /** |
| * Obtains the current {@code JapaneseDate} from the specified clock. |
| * <p> |
| * This will query the specified clock to obtain the current date - today. |
| * Using this method allows the use of an alternate clock for testing. |
| * The alternate clock may be introduced using {@linkplain Clock dependency injection}. |
| * |
| * @param clock the clock to use, not null |
| * @return the current date, not null |
| * @throws DateTimeException if the current date cannot be obtained |
| */ |
| public static JapaneseDate now(Clock clock) { |
| return new JapaneseDate(LocalDate.now(clock)); |
| } |
| |
| /** |
| * Obtains a {@code JapaneseDate} representing a date in the Japanese calendar |
| * system from the era, year-of-era, month-of-year and day-of-month fields. |
| * <p> |
| * This returns a {@code JapaneseDate} with the specified fields. |
| * The day must be valid for the year and month, otherwise an exception will be thrown. |
| * <p> |
| * The Japanese month and day-of-month are the same as those in the |
| * ISO calendar system. They are not reset when the era changes. |
| * For example: |
| * <pre> |
| * 6th Jan Showa 64 = ISO 1989-01-06 |
| * 7th Jan Showa 64 = ISO 1989-01-07 |
| * 8th Jan Heisei 1 = ISO 1989-01-08 |
| * 9th Jan Heisei 1 = ISO 1989-01-09 |
| * </pre> |
| * |
| * @param era the Japanese era, not null |
| * @param yearOfEra the Japanese year-of-era |
| * @param month the Japanese month-of-year, from 1 to 12 |
| * @param dayOfMonth the Japanese day-of-month, from 1 to 31 |
| * @return the date in Japanese calendar system, not null |
| * @throws DateTimeException if the value of any field is out of range, |
| * or if the day-of-month is invalid for the month-year, |
| * or if the date is not a Japanese era |
| */ |
| public static JapaneseDate of(JapaneseEra era, int yearOfEra, int month, int dayOfMonth) { |
| Objects.requireNonNull(era, "era"); |
| LocalGregorianCalendar.Date jdate = JapaneseChronology.JCAL.newCalendarDate(null); |
| jdate.setEra(era.getPrivateEra()).setDate(yearOfEra, month, dayOfMonth); |
| if (!JapaneseChronology.JCAL.validate(jdate)) { |
| throw new DateTimeException("year, month, and day not valid for Era"); |
| } |
| LocalDate date = LocalDate.of(jdate.getNormalizedYear(), month, dayOfMonth); |
| return new JapaneseDate(era, yearOfEra, date); |
| } |
| |
| /** |
| * Obtains a {@code JapaneseDate} representing a date in the Japanese calendar |
| * system from the proleptic-year, month-of-year and day-of-month fields. |
| * <p> |
| * This returns a {@code JapaneseDate} with the specified fields. |
| * The day must be valid for the year and month, otherwise an exception will be thrown. |
| * <p> |
| * The Japanese proleptic year, month and day-of-month are the same as those |
| * in the ISO calendar system. They are not reset when the era changes. |
| * |
| * @param prolepticYear the Japanese proleptic-year |
| * @param month the Japanese month-of-year, from 1 to 12 |
| * @param dayOfMonth the Japanese day-of-month, from 1 to 31 |
| * @return the date in Japanese calendar system, not null |
| * @throws DateTimeException if the value of any field is out of range, |
| * or if the day-of-month is invalid for the month-year |
| */ |
| public static JapaneseDate of(int prolepticYear, int month, int dayOfMonth) { |
| return new JapaneseDate(LocalDate.of(prolepticYear, month, dayOfMonth)); |
| } |
| |
| /** |
| * Obtains a {@code JapaneseDate} representing a date in the Japanese calendar |
| * system from the era, year-of-era and day-of-year fields. |
| * <p> |
| * This returns a {@code JapaneseDate} with the specified fields. |
| * The day must be valid for the year, otherwise an exception will be thrown. |
| * <p> |
| * The day-of-year in this factory is expressed relative to the start of the year-of-era. |
| * This definition changes the normal meaning of day-of-year only in those years |
| * where the year-of-era is reset to one due to a change in the era. |
| * For example: |
| * <pre> |
| * 6th Jan Showa 64 = day-of-year 6 |
| * 7th Jan Showa 64 = day-of-year 7 |
| * 8th Jan Heisei 1 = day-of-year 1 |
| * 9th Jan Heisei 1 = day-of-year 2 |
| * </pre> |
| * |
| * @param era the Japanese era, not null |
| * @param yearOfEra the Japanese year-of-era |
| * @param dayOfYear the chronology day-of-year, from 1 to 366 |
| * @return the date in Japanese calendar system, not null |
| * @throws DateTimeException if the value of any field is out of range, |
| * or if the day-of-year is invalid for the year |
| */ |
| static JapaneseDate ofYearDay(JapaneseEra era, int yearOfEra, int dayOfYear) { |
| Objects.requireNonNull(era, "era"); |
| CalendarDate firstDay = era.getPrivateEra().getSinceDate(); |
| LocalGregorianCalendar.Date jdate = JapaneseChronology.JCAL.newCalendarDate(null); |
| jdate.setEra(era.getPrivateEra()); |
| if (yearOfEra == 1) { |
| jdate.setDate(yearOfEra, firstDay.getMonth(), firstDay.getDayOfMonth() + dayOfYear - 1); |
| } else { |
| jdate.setDate(yearOfEra, 1, dayOfYear); |
| } |
| JapaneseChronology.JCAL.normalize(jdate); |
| if (era.getPrivateEra() != jdate.getEra() || yearOfEra != jdate.getYear()) { |
| throw new DateTimeException("Invalid parameters"); |
| } |
| LocalDate localdate = LocalDate.of(jdate.getNormalizedYear(), |
| jdate.getMonth(), jdate.getDayOfMonth()); |
| return new JapaneseDate(era, yearOfEra, localdate); |
| } |
| |
| /** |
| * Obtains a {@code JapaneseDate} from a temporal object. |
| * <p> |
| * This obtains a date in the Japanese calendar system based on the specified temporal. |
| * A {@code TemporalAccessor} represents an arbitrary set of date and time information, |
| * which this factory converts to an instance of {@code JapaneseDate}. |
| * <p> |
| * The conversion typically uses the {@link ChronoField#EPOCH_DAY EPOCH_DAY} |
| * field, which is standardized across calendar systems. |
| * <p> |
| * This method matches the signature of the functional interface {@link TemporalQuery} |
| * allowing it to be used as a query via method reference, {@code JapaneseDate::from}. |
| * |
| * @param temporal the temporal object to convert, not null |
| * @return the date in Japanese calendar system, not null |
| * @throws DateTimeException if unable to convert to a {@code JapaneseDate} |
| */ |
| public static JapaneseDate from(TemporalAccessor temporal) { |
| return JapaneseChronology.INSTANCE.date(temporal); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Creates an instance from an ISO date. |
| * |
| * @param isoDate the standard local date, validated not null |
| */ |
| JapaneseDate(LocalDate isoDate) { |
| if (isoDate.isBefore(MEIJI_6_ISODATE)) { |
| throw new DateTimeException("JapaneseDate before Meiji 6 is not supported"); |
| } |
| LocalGregorianCalendar.Date jdate = toPrivateJapaneseDate(isoDate); |
| this.era = JapaneseEra.toJapaneseEra(jdate.getEra()); |
| this.yearOfEra = jdate.getYear(); |
| this.isoDate = isoDate; |
| } |
| |
| /** |
| * Constructs a {@code JapaneseDate}. This constructor does NOT validate the given parameters, |
| * and {@code era} and {@code year} must agree with {@code isoDate}. |
| * |
| * @param era the era, validated not null |
| * @param year the year-of-era, validated |
| * @param isoDate the standard local date, validated not null |
| */ |
| JapaneseDate(JapaneseEra era, int year, LocalDate isoDate) { |
| if (isoDate.isBefore(MEIJI_6_ISODATE)) { |
| throw new DateTimeException("JapaneseDate before Meiji 6 is not supported"); |
| } |
| this.era = era; |
| this.yearOfEra = year; |
| this.isoDate = isoDate; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the chronology of this date, which is the Japanese calendar system. |
| * <p> |
| * The {@code Chronology} represents the calendar system in use. |
| * The era and other fields in {@link ChronoField} are defined by the chronology. |
| * |
| * @return the Japanese chronology, not null |
| */ |
| @Override |
| public JapaneseChronology getChronology() { |
| return JapaneseChronology.INSTANCE; |
| } |
| |
| /** |
| * Gets the era applicable at this date. |
| * <p> |
| * The Japanese calendar system has multiple eras defined by {@link JapaneseEra}. |
| * |
| * @return the era applicable at this date, not null |
| */ |
| @Override |
| public JapaneseEra getEra() { |
| return era; |
| } |
| |
| /** |
| * Returns the length of the month represented by this date. |
| * <p> |
| * This returns the length of the month in days. |
| * Month lengths match those of the ISO calendar system. |
| * |
| * @return the length of the month in days |
| */ |
| @Override |
| public int lengthOfMonth() { |
| return isoDate.lengthOfMonth(); |
| } |
| |
| @Override |
| public int lengthOfYear() { |
| // Android-changed: use #createCalendar() to create calendar. |
| Calendar jcal = JapaneseChronology.createCalendar(); |
| jcal.set(Calendar.ERA, era.getValue() + JapaneseEra.ERA_OFFSET); |
| jcal.set(yearOfEra, isoDate.getMonthValue() - 1, isoDate.getDayOfMonth()); |
| return jcal.getActualMaximum(Calendar.DAY_OF_YEAR); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if the specified field is supported. |
| * <p> |
| * This checks if this date can be queried for the specified field. |
| * If false, then calling the {@link #range(TemporalField) range} and |
| * {@link #get(TemporalField) get} methods will throw an exception. |
| * <p> |
| * If the field is a {@link ChronoField} then the query is implemented here. |
| * The supported fields are: |
| * <ul> |
| * <li>{@code DAY_OF_WEEK} |
| * <li>{@code DAY_OF_MONTH} |
| * <li>{@code DAY_OF_YEAR} |
| * <li>{@code EPOCH_DAY} |
| * <li>{@code MONTH_OF_YEAR} |
| * <li>{@code PROLEPTIC_MONTH} |
| * <li>{@code YEAR_OF_ERA} |
| * <li>{@code YEAR} |
| * <li>{@code ERA} |
| * </ul> |
| * All other {@code ChronoField} instances will return false. |
| * <p> |
| * If the field is not a {@code ChronoField}, then the result of this method |
| * is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)} |
| * passing {@code this} as the argument. |
| * Whether the field is supported is determined by the field. |
| * |
| * @param field the field to check, null returns false |
| * @return true if the field is supported on this date, false if not |
| */ |
| @Override |
| public boolean isSupported(TemporalField field) { |
| if (field == ALIGNED_DAY_OF_WEEK_IN_MONTH || field == ALIGNED_DAY_OF_WEEK_IN_YEAR || |
| field == ALIGNED_WEEK_OF_MONTH || field == ALIGNED_WEEK_OF_YEAR) { |
| return false; |
| } |
| return super.isSupported(field); |
| } |
| |
| @Override |
| public ValueRange range(TemporalField field) { |
| if (field instanceof ChronoField) { |
| if (isSupported(field)) { |
| ChronoField f = (ChronoField) field; |
| switch (f) { |
| case DAY_OF_MONTH: return ValueRange.of(1, lengthOfMonth()); |
| case DAY_OF_YEAR: return ValueRange.of(1, lengthOfYear()); |
| case YEAR_OF_ERA: { |
| // Android-changed: use #createCalendar() to create calendar. |
| Calendar jcal = JapaneseChronology.createCalendar(); |
| jcal.set(Calendar.ERA, era.getValue() + JapaneseEra.ERA_OFFSET); |
| jcal.set(yearOfEra, isoDate.getMonthValue() - 1, isoDate.getDayOfMonth()); |
| return ValueRange.of(1, jcal.getActualMaximum(Calendar.YEAR)); |
| } |
| } |
| return getChronology().range(f); |
| } |
| throw new UnsupportedTemporalTypeException("Unsupported field: " + field); |
| } |
| return field.rangeRefinedBy(this); |
| } |
| |
| @Override |
| public long getLong(TemporalField field) { |
| if (field instanceof ChronoField) { |
| // same as ISO: |
| // DAY_OF_WEEK, DAY_OF_MONTH, EPOCH_DAY, MONTH_OF_YEAR, PROLEPTIC_MONTH, YEAR |
| // |
| // calendar specific fields |
| // DAY_OF_YEAR, YEAR_OF_ERA, ERA |
| switch ((ChronoField) field) { |
| case ALIGNED_DAY_OF_WEEK_IN_MONTH: |
| case ALIGNED_DAY_OF_WEEK_IN_YEAR: |
| case ALIGNED_WEEK_OF_MONTH: |
| case ALIGNED_WEEK_OF_YEAR: |
| throw new UnsupportedTemporalTypeException("Unsupported field: " + field); |
| case YEAR_OF_ERA: |
| return yearOfEra; |
| case ERA: |
| return era.getValue(); |
| case DAY_OF_YEAR: |
| // Android-changed: use #createCalendar() to create calendar. |
| Calendar jcal = JapaneseChronology.createCalendar(); |
| jcal.set(Calendar.ERA, era.getValue() + JapaneseEra.ERA_OFFSET); |
| jcal.set(yearOfEra, isoDate.getMonthValue() - 1, isoDate.getDayOfMonth()); |
| return jcal.get(Calendar.DAY_OF_YEAR); |
| } |
| return isoDate.getLong(field); |
| } |
| return field.getFrom(this); |
| } |
| |
| /** |
| * Returns a {@code LocalGregorianCalendar.Date} converted from the given {@code isoDate}. |
| * |
| * @param isoDate the local date, not null |
| * @return a {@code LocalGregorianCalendar.Date}, not null |
| */ |
| private static LocalGregorianCalendar.Date toPrivateJapaneseDate(LocalDate isoDate) { |
| LocalGregorianCalendar.Date jdate = JapaneseChronology.JCAL.newCalendarDate(null); |
| sun.util.calendar.Era sunEra = JapaneseEra.privateEraFrom(isoDate); |
| int year = isoDate.getYear(); |
| if (sunEra != null) { |
| year -= sunEra.getSinceDate().getYear() - 1; |
| } |
| jdate.setEra(sunEra).setYear(year).setMonth(isoDate.getMonthValue()).setDayOfMonth(isoDate.getDayOfMonth()); |
| JapaneseChronology.JCAL.normalize(jdate); |
| return jdate; |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public JapaneseDate with(TemporalField field, long newValue) { |
| if (field instanceof ChronoField chronoField) { |
| if (getLong(chronoField) == newValue) { // getLong() validates for supported fields |
| return this; |
| } |
| switch (chronoField) { |
| case YEAR_OF_ERA: |
| case YEAR: |
| case ERA: { |
| int nvalue = getChronology().range(chronoField).checkValidIntValue(newValue, chronoField); |
| switch (chronoField) { |
| case YEAR_OF_ERA: |
| return this.withYear(nvalue); |
| case YEAR: |
| return with(isoDate.withYear(nvalue)); |
| case ERA: { |
| return this.withYear(JapaneseEra.of(nvalue), yearOfEra); |
| } |
| } |
| } |
| } |
| // YEAR, PROLEPTIC_MONTH and others are same as ISO |
| return with(isoDate.with(field, newValue)); |
| } |
| return super.with(field, newValue); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * @throws DateTimeException {@inheritDoc} |
| * @throws ArithmeticException {@inheritDoc} |
| */ |
| @Override |
| public JapaneseDate with(TemporalAdjuster adjuster) { |
| return super.with(adjuster); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * @throws DateTimeException {@inheritDoc} |
| * @throws ArithmeticException {@inheritDoc} |
| */ |
| @Override |
| public JapaneseDate plus(TemporalAmount amount) { |
| return super.plus(amount); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * @throws DateTimeException {@inheritDoc} |
| * @throws ArithmeticException {@inheritDoc} |
| */ |
| @Override |
| public JapaneseDate minus(TemporalAmount amount) { |
| return super.minus(amount); |
| } |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this date with the year altered. |
| * <p> |
| * This method changes the year of the date. |
| * If the month-day is invalid for the year, then the previous valid day |
| * will be selected instead. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param era the era to set in the result, not null |
| * @param yearOfEra the year-of-era to set in the returned date |
| * @return a {@code JapaneseDate} based on this date with the requested year, never null |
| * @throws DateTimeException if {@code year} is invalid |
| */ |
| private JapaneseDate withYear(JapaneseEra era, int yearOfEra) { |
| int year = JapaneseChronology.INSTANCE.prolepticYear(era, yearOfEra); |
| return with(isoDate.withYear(year)); |
| } |
| |
| /** |
| * Returns a copy of this date with the year-of-era altered. |
| * <p> |
| * This method changes the year-of-era of the date. |
| * If the month-day is invalid for the year, then the previous valid day |
| * will be selected instead. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param year the year to set in the returned date |
| * @return a {@code JapaneseDate} based on this date with the requested year-of-era, never null |
| * @throws DateTimeException if {@code year} is invalid |
| */ |
| private JapaneseDate withYear(int year) { |
| return withYear(getEra(), year); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| JapaneseDate plusYears(long years) { |
| return with(isoDate.plusYears(years)); |
| } |
| |
| @Override |
| JapaneseDate plusMonths(long months) { |
| return with(isoDate.plusMonths(months)); |
| } |
| |
| @Override |
| JapaneseDate plusWeeks(long weeksToAdd) { |
| return with(isoDate.plusWeeks(weeksToAdd)); |
| } |
| |
| @Override |
| JapaneseDate plusDays(long days) { |
| return with(isoDate.plusDays(days)); |
| } |
| |
| @Override |
| public JapaneseDate plus(long amountToAdd, TemporalUnit unit) { |
| return super.plus(amountToAdd, unit); |
| } |
| |
| @Override |
| public JapaneseDate minus(long amountToAdd, TemporalUnit unit) { |
| return super.minus(amountToAdd, unit); |
| } |
| |
| @Override |
| JapaneseDate minusYears(long yearsToSubtract) { |
| return super.minusYears(yearsToSubtract); |
| } |
| |
| @Override |
| JapaneseDate minusMonths(long monthsToSubtract) { |
| return super.minusMonths(monthsToSubtract); |
| } |
| |
| @Override |
| JapaneseDate minusWeeks(long weeksToSubtract) { |
| return super.minusWeeks(weeksToSubtract); |
| } |
| |
| @Override |
| JapaneseDate minusDays(long daysToSubtract) { |
| return super.minusDays(daysToSubtract); |
| } |
| |
| private JapaneseDate with(LocalDate newDate) { |
| return (newDate.equals(isoDate) ? this : new JapaneseDate(newDate)); |
| } |
| |
| @Override // for javadoc and covariant return type |
| @SuppressWarnings("unchecked") |
| public final ChronoLocalDateTime<JapaneseDate> atTime(LocalTime localTime) { |
| return (ChronoLocalDateTime<JapaneseDate>)super.atTime(localTime); |
| } |
| |
| @Override |
| public ChronoPeriod until(ChronoLocalDate endDate) { |
| Period period = isoDate.until(endDate); |
| return getChronology().period(period.getYears(), period.getMonths(), period.getDays()); |
| } |
| |
| @Override // override for performance |
| public long toEpochDay() { |
| return isoDate.toEpochDay(); |
| } |
| |
| //------------------------------------------------------------------------- |
| /** |
| * Compares this date to another date, including the chronology. |
| * <p> |
| * Compares this {@code JapaneseDate} with another ensuring that the date is the same. |
| * <p> |
| * Only objects of type {@code JapaneseDate} are compared, other types return false. |
| * To compare the dates of two {@code TemporalAccessor} instances, including dates |
| * in two different chronologies, use {@link ChronoField#EPOCH_DAY} as a comparator. |
| * |
| * @param obj the object to check, null returns false |
| * @return true if this is equal to the other date |
| */ |
| @Override // override for performance |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| return (obj instanceof JapaneseDate otherDate) |
| && this.isoDate.equals(otherDate.isoDate); |
| } |
| |
| /** |
| * A hash code for this date. |
| * |
| * @return a suitable hash code based only on the Chronology and the date |
| */ |
| @Override // override for performance |
| public int hashCode() { |
| return getChronology().getId().hashCode() ^ isoDate.hashCode(); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Defend against malicious streams. |
| * |
| * @param s the stream to read |
| * @throws InvalidObjectException always |
| */ |
| @java.io.Serial |
| private void readObject(ObjectInputStream s) throws InvalidObjectException { |
| throw new InvalidObjectException("Deserialization via serialization delegate"); |
| } |
| |
| /** |
| * Writes the object using a |
| * <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>. |
| * @serialData |
| * <pre> |
| * out.writeByte(4); // identifies a JapaneseDate |
| * out.writeInt(get(YEAR)); |
| * out.writeByte(get(MONTH_OF_YEAR)); |
| * out.writeByte(get(DAY_OF_MONTH)); |
| * </pre> |
| * |
| * @return the instance of {@code Ser}, not null |
| */ |
| @java.io.Serial |
| private Object writeReplace() { |
| return new Ser(Ser.JAPANESE_DATE_TYPE, this); |
| } |
| |
| void writeExternal(DataOutput out) throws IOException { |
| // JapaneseChronology is implicit in the JAPANESE_DATE_TYPE |
| out.writeInt(get(YEAR)); |
| out.writeByte(get(MONTH_OF_YEAR)); |
| out.writeByte(get(DAY_OF_MONTH)); |
| } |
| |
| static JapaneseDate readExternal(DataInput in) throws IOException { |
| int year = in.readInt(); |
| int month = in.readByte(); |
| int dayOfMonth = in.readByte(); |
| return JapaneseChronology.INSTANCE.date(year, month, dayOfMonth); |
| } |
| |
| } |
