546 lines
21 KiB
Java
546 lines
21 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.DAY_OF_MONTH;
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import static java.time.temporal.ChronoField.DAY_OF_YEAR;
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import static java.time.temporal.ChronoField.ERA;
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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 static java.time.temporal.ChronoField.YEAR_OF_ERA;
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import static java.time.temporal.ChronoUnit.DAYS;
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import static java.time.temporal.ChronoUnit.MONTHS;
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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.Instant;
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import java.time.LocalDate;
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import java.time.Year;
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import java.time.ZoneId;
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import java.time.format.ResolverStyle;
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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.TemporalAdjusters;
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import java.time.temporal.TemporalField;
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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.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.TimeZone;
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import sun.util.calendar.CalendarSystem;
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import sun.util.calendar.LocalGregorianCalendar;
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/**
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* The Japanese Imperial calendar system.
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* <p>
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* This chronology defines the rules of the Japanese Imperial calendar system.
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* This calendar system is primarily used in Japan.
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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.
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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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* The supported {@code ChronoField} instances 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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*
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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 JapaneseChronology extends AbstractChronology implements Serializable {
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static final LocalGregorianCalendar JCAL =
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(LocalGregorianCalendar) CalendarSystem.forName("japanese");
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// Android-changed: don't use locale to create japanese imperial calendar, as it's not generally
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// supported on Android. Use Calendar.getJapaneseImperialInstance() instead. See .createCalendar
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// Locale for creating a JapaneseImpericalCalendar.
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private static final Locale LOCALE = Locale.forLanguageTag("ja-JP-u-ca-japanese");
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static Calendar createCalendar() {
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return Calendar.getJapaneseImperialInstance(TimeZone.getDefault(), LOCALE);
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}
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/**
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* Singleton instance for Japanese chronology.
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*/
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public static final JapaneseChronology INSTANCE = new JapaneseChronology();
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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 = 459996390165777884L;
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//-----------------------------------------------------------------------
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/**
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* Restricted constructor.
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*/
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private JapaneseChronology() {
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}
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//-----------------------------------------------------------------------
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/**
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* Gets the ID of the chronology - 'Japanese'.
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* <p>
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* The ID uniquely identifies the {@code Chronology}.
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* It can be used to lookup the {@code Chronology} using {@link Chronology#of(String)}.
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*
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* @return the chronology ID - 'Japanese'
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* @see #getCalendarType()
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*/
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@Override
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public String getId() {
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return "Japanese";
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}
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/**
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* Gets the calendar type of the underlying calendar system - 'japanese'.
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* <p>
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* The calendar type is an identifier defined by the
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* <em>Unicode Locale Data Markup Language (LDML)</em> specification.
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* It can be used to lookup the {@code Chronology} using {@link Chronology#of(String)}.
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* It can also be used as part of a locale, accessible via
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* {@link Locale#getUnicodeLocaleType(String)} with the key 'ca'.
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*
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* @return the calendar system type - 'japanese'
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* @see #getId()
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*/
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@Override
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public String getCalendarType() {
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return "japanese";
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}
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//-----------------------------------------------------------------------
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/**
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* Obtains a local date in Japanese calendar system from the
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* era, year-of-era, month-of-year and day-of-month fields.
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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 year-of-era
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* @param month the month-of-year
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* @param dayOfMonth the day-of-month
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* @return the Japanese local date, not null
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* @throws DateTimeException if unable to create the date
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* @throws ClassCastException if the {@code era} is not a {@code JapaneseEra}
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*/
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@Override
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public JapaneseDate date(Era era, int yearOfEra, int month, int dayOfMonth) {
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if (!(era instanceof JapaneseEra jera)) {
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throw new ClassCastException("Era must be JapaneseEra");
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}
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return JapaneseDate.of(jera, yearOfEra, month, dayOfMonth);
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}
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/**
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* Obtains a local date in Japanese calendar system from the
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* proleptic-year, month-of-year and day-of-month fields.
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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 proleptic-year
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* @param month the month-of-year
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* @param dayOfMonth the day-of-month
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* @return the Japanese local date, not null
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* @throws DateTimeException if unable to create the date
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*/
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@Override
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public JapaneseDate date(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 local date in Japanese calendar system from the
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* era, year-of-era and day-of-year fields.
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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 year-of-era
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* @param dayOfYear the day-of-year
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* @return the Japanese local date, not null
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* @throws DateTimeException if unable to create the date
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* @throws ClassCastException if the {@code era} is not a {@code JapaneseEra}
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*/
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@Override
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public JapaneseDate dateYearDay(Era era, int yearOfEra, int dayOfYear) {
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return JapaneseDate.ofYearDay((JapaneseEra) era, yearOfEra, dayOfYear);
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}
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/**
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* Obtains a local date in Japanese calendar system from the
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* proleptic-year and day-of-year fields.
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* <p>
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* The day-of-year in this factory is expressed relative to the start of the proleptic year.
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* The Japanese proleptic year and day-of-year are the same as those in the ISO calendar system.
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* They are not reset when the era changes.
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*
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* @param prolepticYear the proleptic-year
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* @param dayOfYear the day-of-year
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* @return the Japanese local date, not null
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* @throws DateTimeException if unable to create the date
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*/
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@Override
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public JapaneseDate dateYearDay(int prolepticYear, int dayOfYear) {
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return new JapaneseDate(LocalDate.ofYearDay(prolepticYear, dayOfYear));
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}
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/**
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* Obtains a local date in the Japanese calendar system from the epoch-day.
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*
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* @param epochDay the epoch day
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* @return the Japanese local date, not null
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* @throws DateTimeException if unable to create the date
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*/
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@Override // override with covariant return type
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public JapaneseDate dateEpochDay(long epochDay) {
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return new JapaneseDate(LocalDate.ofEpochDay(epochDay));
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}
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@Override
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public JapaneseDate dateNow() {
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return dateNow(Clock.systemDefaultZone());
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}
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@Override
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public JapaneseDate dateNow(ZoneId zone) {
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return dateNow(Clock.system(zone));
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}
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@Override
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public JapaneseDate dateNow(Clock clock) {
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return date(LocalDate.now(clock));
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}
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@Override
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public JapaneseDate date(TemporalAccessor temporal) {
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if (temporal instanceof JapaneseDate) {
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return (JapaneseDate) temporal;
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}
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return new JapaneseDate(LocalDate.from(temporal));
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}
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@Override
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@SuppressWarnings("unchecked")
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public ChronoLocalDateTime<JapaneseDate> localDateTime(TemporalAccessor temporal) {
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return (ChronoLocalDateTime<JapaneseDate>)super.localDateTime(temporal);
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}
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@Override
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@SuppressWarnings("unchecked")
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public ChronoZonedDateTime<JapaneseDate> zonedDateTime(TemporalAccessor temporal) {
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return (ChronoZonedDateTime<JapaneseDate>)super.zonedDateTime(temporal);
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}
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@Override
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@SuppressWarnings("unchecked")
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public ChronoZonedDateTime<JapaneseDate> zonedDateTime(Instant instant, ZoneId zone) {
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return (ChronoZonedDateTime<JapaneseDate>)super.zonedDateTime(instant, zone);
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}
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//-----------------------------------------------------------------------
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/**
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* Checks if the specified year is a leap year.
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* <p>
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* Japanese calendar leap years occur exactly in line with ISO leap years.
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* This method does not validate the year passed in, and only has a
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* well-defined result for years in the supported range.
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*
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* @param prolepticYear the proleptic-year to check, not validated for range
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* @return true if the year is a leap year
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*/
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@Override
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public boolean isLeapYear(long prolepticYear) {
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return IsoChronology.INSTANCE.isLeapYear(prolepticYear);
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}
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@Override
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public int prolepticYear(Era era, int yearOfEra) {
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if (era instanceof JapaneseEra == false) {
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throw new ClassCastException("Era must be JapaneseEra");
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}
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JapaneseEra jera = (JapaneseEra) era;
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int gregorianYear = jera.getPrivateEra().getSinceDate().getYear() + yearOfEra - 1;
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if (yearOfEra == 1) {
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return gregorianYear;
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}
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if (gregorianYear >= Year.MIN_VALUE && gregorianYear <= Year.MAX_VALUE) {
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LocalGregorianCalendar.Date jdate = JCAL.newCalendarDate(null);
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jdate.setEra(jera.getPrivateEra()).setDate(yearOfEra, 1, 1);
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if (JapaneseChronology.JCAL.validate(jdate)) {
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return gregorianYear;
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}
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}
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throw new DateTimeException("Invalid yearOfEra value");
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}
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// Android-changed: Integrate OpenJDK support for Japanese Era Reiwa.
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/**
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* Returns the calendar system era object from the given numeric value.
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*
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* The numeric values supported by this method are the same as the
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* numeric values supported by {@link JapaneseEra#of(int)}.
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*
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* @param eraValue the era value
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* @return the Japanese {@code Era} for the given numeric era value
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* @throws DateTimeException if {@code eraValue} is invalid
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*/
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@Override
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public JapaneseEra eraOf(int eraValue) {
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return JapaneseEra.of(eraValue);
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}
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@Override
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public List<Era> eras() {
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return List.of(JapaneseEra.values());
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}
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JapaneseEra getCurrentEra() {
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// Assume that the last JapaneseEra is the current one.
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JapaneseEra[] eras = JapaneseEra.values();
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return eras[eras.length - 1];
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}
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//-----------------------------------------------------------------------
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@Override
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public ValueRange range(ChronoField field) {
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switch (field) {
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case ALIGNED_DAY_OF_WEEK_IN_MONTH:
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case ALIGNED_DAY_OF_WEEK_IN_YEAR:
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case ALIGNED_WEEK_OF_MONTH:
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case ALIGNED_WEEK_OF_YEAR:
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throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
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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 = createCalendar();
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int startYear = getCurrentEra().getPrivateEra().getSinceDate().getYear();
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return ValueRange.of(1, jcal.getGreatestMinimum(Calendar.YEAR),
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jcal.getLeastMaximum(Calendar.YEAR) + 1, // +1 due to the different definitions
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Year.MAX_VALUE - startYear);
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}
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case DAY_OF_YEAR: {
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// Android-changed: use #createCalendar() to create calendar.
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Calendar jcal = createCalendar();
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int fieldIndex = Calendar.DAY_OF_YEAR;
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return ValueRange.of(jcal.getMinimum(fieldIndex), jcal.getGreatestMinimum(fieldIndex),
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jcal.getLeastMaximum(fieldIndex), jcal.getMaximum(fieldIndex));
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}
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case YEAR:
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return ValueRange.of(JapaneseDate.MEIJI_6_ISODATE.getYear(), Year.MAX_VALUE);
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case ERA:
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return ValueRange.of(JapaneseEra.MEIJI.getValue(), getCurrentEra().getValue());
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default:
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return field.range();
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}
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}
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//-----------------------------------------------------------------------
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@Override // override for return type
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public JapaneseDate resolveDate(Map <TemporalField, Long> fieldValues, ResolverStyle resolverStyle) {
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return (JapaneseDate) super.resolveDate(fieldValues, resolverStyle);
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}
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@Override // override for special Japanese behavior
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ChronoLocalDate resolveYearOfEra(Map<TemporalField, Long> fieldValues, ResolverStyle resolverStyle) {
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// validate era and year-of-era
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Long eraLong = fieldValues.get(ERA);
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JapaneseEra era = null;
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if (eraLong != null) {
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era = eraOf(range(ERA).checkValidIntValue(eraLong, ERA)); // always validated
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}
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Long yoeLong = fieldValues.get(YEAR_OF_ERA);
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int yoe = 0;
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if (yoeLong != null) {
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yoe = range(YEAR_OF_ERA).checkValidIntValue(yoeLong, YEAR_OF_ERA); // always validated
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}
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// if only year-of-era and no year then invent era unless strict
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if (era == null && yoeLong != null && fieldValues.containsKey(YEAR) == false && resolverStyle != ResolverStyle.STRICT) {
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era = JapaneseEra.values()[JapaneseEra.values().length - 1];
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}
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// if both present, then try to create date
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if (yoeLong != null && era != null) {
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if (fieldValues.containsKey(MONTH_OF_YEAR)) {
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if (fieldValues.containsKey(DAY_OF_MONTH)) {
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return resolveYMD(era, yoe, fieldValues, resolverStyle);
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}
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}
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if (fieldValues.containsKey(DAY_OF_YEAR)) {
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return resolveYD(era, yoe, fieldValues, resolverStyle);
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}
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}
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return null;
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}
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private int prolepticYearLenient(JapaneseEra era, int yearOfEra) {
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return era.getPrivateEra().getSinceDate().getYear() + yearOfEra - 1;
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}
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private ChronoLocalDate resolveYMD(JapaneseEra era, int yoe, Map<TemporalField,Long> fieldValues, ResolverStyle resolverStyle) {
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fieldValues.remove(ERA);
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fieldValues.remove(YEAR_OF_ERA);
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if (resolverStyle == ResolverStyle.LENIENT) {
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int y = prolepticYearLenient(era, yoe);
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long months = Math.subtractExact(fieldValues.remove(MONTH_OF_YEAR), 1);
|
|
long days = Math.subtractExact(fieldValues.remove(DAY_OF_MONTH), 1);
|
|
return date(y, 1, 1).plus(months, MONTHS).plus(days, DAYS);
|
|
}
|
|
int moy = range(MONTH_OF_YEAR).checkValidIntValue(fieldValues.remove(MONTH_OF_YEAR), MONTH_OF_YEAR);
|
|
int dom = range(DAY_OF_MONTH).checkValidIntValue(fieldValues.remove(DAY_OF_MONTH), DAY_OF_MONTH);
|
|
if (resolverStyle == ResolverStyle.SMART) { // previous valid
|
|
if (yoe < 1) {
|
|
throw new DateTimeException("Invalid YearOfEra: " + yoe);
|
|
}
|
|
int y = prolepticYearLenient(era, yoe);
|
|
JapaneseDate result;
|
|
try {
|
|
result = date(y, moy, dom);
|
|
} catch (DateTimeException ex) {
|
|
result = date(y, moy, 1).with(TemporalAdjusters.lastDayOfMonth());
|
|
}
|
|
// handle the era being changed
|
|
// only allow if the new date is in the same Jan-Dec as the era change
|
|
// determine by ensuring either original yoe or result yoe is 1
|
|
if (result.getEra() != era && result.get(YEAR_OF_ERA) > 1 && yoe > 1) {
|
|
throw new DateTimeException("Invalid YearOfEra for Era: " + era + " " + yoe);
|
|
}
|
|
return result;
|
|
}
|
|
return date(era, yoe, moy, dom);
|
|
}
|
|
|
|
private ChronoLocalDate resolveYD(JapaneseEra era, int yoe, Map <TemporalField,Long> fieldValues, ResolverStyle resolverStyle) {
|
|
fieldValues.remove(ERA);
|
|
fieldValues.remove(YEAR_OF_ERA);
|
|
if (resolverStyle == ResolverStyle.LENIENT) {
|
|
int y = prolepticYearLenient(era, yoe);
|
|
long days = Math.subtractExact(fieldValues.remove(DAY_OF_YEAR), 1);
|
|
return dateYearDay(y, 1).plus(days, DAYS);
|
|
}
|
|
int doy = range(DAY_OF_YEAR).checkValidIntValue(fieldValues.remove(DAY_OF_YEAR), DAY_OF_YEAR);
|
|
return dateYearDay(era, yoe, doy); // smart is same as strict
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes the Chronology using a
|
|
* <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
|
|
* @serialData
|
|
* <pre>
|
|
* out.writeByte(1); // identifies a Chronology
|
|
* out.writeUTF(getId());
|
|
* </pre>
|
|
*
|
|
* @return the instance of {@code Ser}, not null
|
|
*/
|
|
@Override
|
|
@java.io.Serial
|
|
Object writeReplace() {
|
|
return super.writeReplace();
|
|
}
|
|
|
|
/**
|
|
* 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");
|
|
}
|
|
}
|