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