/* * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * * Neither the name of JSR-310 nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package java.time.chrono; import java.io.DataInput; import java.io.DataOutput; import java.io.IOException; import java.io.InvalidObjectException; import java.io.ObjectStreamException; import java.io.Serializable; import java.time.DateTimeException; import java.time.LocalDate; import java.util.Arrays; import sun.util.calendar.CalendarDate; /** * An era in the Japanese Imperial calendar system. *
* This class defines the valid eras for the Japanese chronology. * Only Meiji (1868-09-08 - 1912-07-29) and later eras are supported. * Japan introduced the Gregorian calendar since Meiji 6. The dates * between Meiji 1 - 5 are not historically correct. * The older eras are recognized as Seireki (Western calendar) era, * and the year of era of Seireki is proleptic Gregorian year. * (The Julian to Gregorian transition is not supported.) * *
* The {@link #SHOWA} era that contains 1970-01-01 (ISO calendar system) has the value 1 * Later era is numbered 2 ({@link #HEISEI}). Earlier eras are numbered 0 ({@link #TAISHO}), * -1 ({@link #MEIJI}), only Meiji and later eras are supported. The prior to Meiji, * {@link #SEIREKI} is used. * * @param japaneseEra the era to represent * @return the {@code JapaneseEra} singleton, never null * @throws DateTimeException if {@code japaneseEra} is invalid */ public static JapaneseEra of(int japaneseEra) { if (japaneseEra != SEIREKI.eraValue && (japaneseEra < MEIJI.eraValue || japaneseEra > HEISEI.eraValue)) { throw new DateTimeException("japaneseEra is invalid"); } return KNOWN_ERAS[ordinal(japaneseEra)]; } /** * Returns an array of JapaneseEras. * @return an array of JapaneseEras */ static JapaneseEra[] values() { return Arrays.copyOf(KNOWN_ERAS, KNOWN_ERAS.length); } //----------------------------------------------------------------------- /** * Obtains an instance of {@code JapaneseEra} from a date. * * @param date the date, not null * @return the Era singleton, never null */ static JapaneseEra from(LocalDate date) { for (int i = KNOWN_ERAS.length - 1; i > 0; i--) { JapaneseEra era = KNOWN_ERAS[i]; if (date.compareTo(era.since) >= 0) { return era; } } return SEIREKI; } static JapaneseEra toJapaneseEra(sun.util.calendar.Era privateEra) { for (int i = ERA_CONFIG.length - 1; i > 0; i--) { if (ERA_CONFIG[i].equals(privateEra)) { return KNOWN_ERAS[i]; } } return SEIREKI; } static sun.util.calendar.Era privateEraFrom(LocalDate isoDate) { for (int i = KNOWN_ERAS.length - 1; i > 0; i--) { JapaneseEra era = KNOWN_ERAS[i]; if (isoDate.compareTo(era.since) >= 0) { return ERA_CONFIG[i]; } } return null; } /** * Returns the index into the arrays from the Era value. * the eraValue is a valid Era number, -999, -1..2. * @param eravalue the era value to convert to the index * @return the index of the current Era */ private static int ordinal(int eravalue) { return (eravalue == SEIREKI.eraValue) ? 0 : eravalue + ERA_OFFSET; } //----------------------------------------------------------------------- /** * Returns the numeric value of this {@code JapaneseEra}. *
* The {@link #SHOWA} era that contains 1970-01-01 (ISO calendar system) has the value 1. * Later eras are numbered from 2 ({@link #HEISEI}). * Earlier eras are numbered 0 ({@link #TAISHO}), -1 ({@link #MEIJI}), and -999 ({@link #SEIREKI}). * * @return the era value */ @Override public int getValue() { return eraValue; } @Override public JapaneseChronology getChronology() { return JapaneseChronology.INSTANCE; } //----------------------------------------------------------------------- String getAbbreviation() { int index = ordinal(getValue()); if (index == 0) { return ""; } return ERA_CONFIG[index].getAbbreviation(); } String getName() { int index = ordinal(getValue()); if (index == 0) { return "Seireki"; } return ERA_CONFIG[index].getName(); } @Override public String toString() { return getName(); } //----------------------------------------------------------------------- private Object writeReplace() { return new Ser(Ser.JAPANESE_ERA_TYPE, this); } void writeExternal(DataOutput out) throws IOException { out.writeByte(this.getValue()); } static JapaneseEra readExternal(DataInput in) throws IOException { byte eraValue = in.readByte(); return JapaneseEra.of(eraValue); } }