author | okutsu |
Thu, 15 Dec 2016 13:08:01 +0900 | |
changeset 42696 | a0df1f76b88e |
parent 28772 | 5259f2a59d83 |
child 44368 | 268fa1f3e670 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, 2016, 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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/* |
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* This file is available under and governed by the GNU General Public |
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* License version 2 only, as published by the Free Software Foundation. |
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* However, the following notice accompanied the original version of this |
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* file: |
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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.chrono.JapaneseDate.MEIJI_6_ISODATE; |
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import static java.time.temporal.ChronoField.ERA; |
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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.ObjectStreamException; |
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import java.io.Serializable; |
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import java.time.DateTimeException; |
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import java.time.LocalDate; |
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import java.time.format.TextStyle; |
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import java.time.temporal.ChronoField; |
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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.Arrays; |
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import java.util.Locale; |
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import java.util.Objects; |
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import sun.util.calendar.CalendarDate; |
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/** |
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* An era in the Japanese Imperial calendar system. |
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* <p> |
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* This class defines the valid eras for the Japanese chronology. |
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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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* |
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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 JapaneseEra |
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implements Era, Serializable { |
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// The offset value to 0-based index from the era value. |
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// i.e., getValue() + ERA_OFFSET == 0-based index |
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static final int ERA_OFFSET = 2; |
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static final sun.util.calendar.Era[] ERA_CONFIG; |
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/** |
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* The singleton instance for the 'Meiji' era (1868-01-01 - 1912-07-29) |
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* which has the value -1. |
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*/ |
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public static final JapaneseEra MEIJI = new JapaneseEra(-1, LocalDate.of(1868, 1, 1)); |
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/** |
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* The singleton instance for the 'Taisho' era (1912-07-30 - 1926-12-24) |
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* which has the value 0. |
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*/ |
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public static final JapaneseEra TAISHO = new JapaneseEra(0, LocalDate.of(1912, 7, 30)); |
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/** |
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* The singleton instance for the 'Showa' era (1926-12-25 - 1989-01-07) |
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* which has the value 1. |
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*/ |
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public static final JapaneseEra SHOWA = new JapaneseEra(1, LocalDate.of(1926, 12, 25)); |
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/** |
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* The singleton instance for the 'Heisei' era (1989-01-08 - current) |
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* which has the value 2. |
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*/ |
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public static final JapaneseEra HEISEI = new JapaneseEra(2, LocalDate.of(1989, 1, 8)); |
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// The number of predefined JapaneseEra constants. |
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// There may be a supplemental era defined by the property. |
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private static final int N_ERA_CONSTANTS = HEISEI.getValue() + ERA_OFFSET; |
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/** |
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* Serialization version. |
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*/ |
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private static final long serialVersionUID = 1466499369062886794L; |
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// array for the singleton JapaneseEra instances |
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private static final JapaneseEra[] KNOWN_ERAS; |
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static { |
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ERA_CONFIG = JapaneseChronology.JCAL.getEras(); |
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KNOWN_ERAS = new JapaneseEra[ERA_CONFIG.length]; |
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KNOWN_ERAS[0] = MEIJI; |
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KNOWN_ERAS[1] = TAISHO; |
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KNOWN_ERAS[2] = SHOWA; |
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KNOWN_ERAS[3] = HEISEI; |
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for (int i = N_ERA_CONSTANTS; i < ERA_CONFIG.length; i++) { |
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CalendarDate date = ERA_CONFIG[i].getSinceDate(); |
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LocalDate isoDate = LocalDate.of(date.getYear(), date.getMonth(), date.getDayOfMonth()); |
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KNOWN_ERAS[i] = new JapaneseEra(i - ERA_OFFSET + 1, isoDate); |
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} |
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}; |
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/** |
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* The era value. |
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* @serial |
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*/ |
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private final transient int eraValue; |
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// the first day of the era |
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private final transient LocalDate since; |
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/** |
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* Creates an instance. |
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* |
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* @param eraValue the era value, validated |
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* @param since the date representing the first date of the era, validated not null |
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*/ |
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private JapaneseEra(int eraValue, LocalDate since) { |
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this.eraValue = eraValue; |
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this.since = since; |
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} |
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//----------------------------------------------------------------------- |
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/** |
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* Returns the Sun private Era instance corresponding to this {@code JapaneseEra}. |
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* |
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* @return the Sun private Era instance for this {@code JapaneseEra}. |
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*/ |
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sun.util.calendar.Era getPrivateEra() { |
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return ERA_CONFIG[ordinal(eraValue)]; |
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} |
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//----------------------------------------------------------------------- |
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/** |
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* Obtains an instance of {@code JapaneseEra} from an {@code int} value. |
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* <p> |
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* The {@link #SHOWA} era that contains 1970-01-01 (ISO calendar system) has the value 1 |
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* Later era is numbered 2 ({@link #HEISEI}). Earlier eras are numbered 0 ({@link #TAISHO}), |
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* -1 ({@link #MEIJI}), only Meiji and later eras are supported. |
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* |
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* @param japaneseEra the era to represent |
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* @return the {@code JapaneseEra} singleton, not null |
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* @throws DateTimeException if the value is invalid |
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*/ |
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public static JapaneseEra of(int japaneseEra) { |
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int i = ordinal(japaneseEra); |
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if (i < 0 || i >= KNOWN_ERAS.length) { |
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throw new DateTimeException("Invalid era: " + japaneseEra); |
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} |
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return KNOWN_ERAS[i]; |
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} |
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/** |
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* Returns the {@code JapaneseEra} with the name. |
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* <p> |
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* The string must match exactly the name of the era. |
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* (Extraneous whitespace characters are not permitted.) |
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* |
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* @param japaneseEra the japaneseEra name; non-null |
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* @return the {@code JapaneseEra} singleton, never null |
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* @throws IllegalArgumentException if there is not JapaneseEra with the specified name |
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*/ |
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public static JapaneseEra valueOf(String japaneseEra) { |
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Objects.requireNonNull(japaneseEra, "japaneseEra"); |
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for (JapaneseEra era : KNOWN_ERAS) { |
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if (era.getName().equals(japaneseEra)) { |
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return era; |
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} |
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} |
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throw new IllegalArgumentException("japaneseEra is invalid"); |
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} |
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/** |
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* Returns an array of JapaneseEras. |
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* <p> |
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* This method may be used to iterate over the JapaneseEras as follows: |
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* <pre> |
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* for (JapaneseEra c : JapaneseEra.values()) |
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* System.out.println(c); |
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* </pre> |
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* |
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* @return an array of JapaneseEras |
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*/ |
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public static JapaneseEra[] values() { |
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return Arrays.copyOf(KNOWN_ERAS, KNOWN_ERAS.length); |
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} |
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/** |
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* Gets the textual representation of this era. |
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* <p> |
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* This returns the textual name used to identify the era, |
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* suitable for presentation to the user. |
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* The parameters control the style of the returned text and the locale. |
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* <p> |
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* If no textual mapping is found then the {@link #getValue() numeric value} |
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* is returned. |
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* |
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* @param style the style of the text required, not null |
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* @param locale the locale to use, not null |
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* @return the text value of the era, not null |
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* @since 9 |
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*/ |
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@Override |
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public String getDisplayName(TextStyle style, Locale locale) { |
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// If this JapaneseEra is a supplemental one, obtain the name from |
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// the era definition. |
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if (getValue() > N_ERA_CONSTANTS - ERA_OFFSET) { |
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Objects.requireNonNull(locale, "locale"); |
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return style.asNormal() == TextStyle.NARROW ? getAbbreviation() : getName(); |
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} |
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return Era.super.getDisplayName(style, locale); |
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} |
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//----------------------------------------------------------------------- |
269 |
/** |
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270 |
* Obtains an instance of {@code JapaneseEra} from a date. |
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* |
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272 |
* @param date the date, not null |
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273 |
* @return the Era singleton, never null |
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274 |
*/ |
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275 |
static JapaneseEra from(LocalDate date) { |
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if (date.isBefore(MEIJI_6_ISODATE)) { |
277 |
throw new DateTimeException("JapaneseDate before Meiji 6 are not supported"); |
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278 |
} |
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for (int i = KNOWN_ERAS.length - 1; i > 0; i--) { |
280 |
JapaneseEra era = KNOWN_ERAS[i]; |
|
281 |
if (date.compareTo(era.since) >= 0) { |
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282 |
return era; |
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283 |
} |
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284 |
} |
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return null; |
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} |
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static JapaneseEra toJapaneseEra(sun.util.calendar.Era privateEra) { |
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for (int i = ERA_CONFIG.length - 1; i >= 0; i--) { |
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if (ERA_CONFIG[i].equals(privateEra)) { |
291 |
return KNOWN_ERAS[i]; |
|
292 |
} |
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293 |
} |
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19030 | 294 |
return null; |
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} |
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static sun.util.calendar.Era privateEraFrom(LocalDate isoDate) { |
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298 |
for (int i = KNOWN_ERAS.length - 1; i > 0; i--) { |
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299 |
JapaneseEra era = KNOWN_ERAS[i]; |
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300 |
if (isoDate.compareTo(era.since) >= 0) { |
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301 |
return ERA_CONFIG[i]; |
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} |
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303 |
} |
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304 |
return null; |
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} |
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/** |
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308 |
* Returns the index into the arrays from the Era value. |
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19030 | 309 |
* the eraValue is a valid Era number, -1..2. |
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* |
311 |
* @param eraValue the era value to convert to the index |
|
15658 | 312 |
* @return the index of the current Era |
313 |
*/ |
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16852 | 314 |
private static int ordinal(int eraValue) { |
19030 | 315 |
return eraValue + ERA_OFFSET - 1; |
15658 | 316 |
} |
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318 |
//----------------------------------------------------------------------- |
|
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/** |
|
16852 | 320 |
* Gets the numeric era {@code int} value. |
15658 | 321 |
* <p> |
322 |
* The {@link #SHOWA} era that contains 1970-01-01 (ISO calendar system) has the value 1. |
|
323 |
* Later eras are numbered from 2 ({@link #HEISEI}). |
|
19030 | 324 |
* Earlier eras are numbered 0 ({@link #TAISHO}), -1 ({@link #MEIJI})). |
15658 | 325 |
* |
326 |
* @return the era value |
|
327 |
*/ |
|
328 |
@Override |
|
329 |
public int getValue() { |
|
330 |
return eraValue; |
|
331 |
} |
|
332 |
||
16852 | 333 |
//----------------------------------------------------------------------- |
334 |
/** |
|
335 |
* Gets the range of valid values for the specified field. |
|
336 |
* <p> |
|
337 |
* The range object expresses the minimum and maximum valid values for a field. |
|
338 |
* This era is used to enhance the accuracy of the returned range. |
|
339 |
* If it is not possible to return the range, because the field is not supported |
|
340 |
* or for some other reason, an exception is thrown. |
|
341 |
* <p> |
|
342 |
* If the field is a {@link ChronoField} then the query is implemented here. |
|
343 |
* The {@code ERA} field returns the range. |
|
344 |
* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. |
|
345 |
* <p> |
|
346 |
* If the field is not a {@code ChronoField}, then the result of this method |
|
347 |
* is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)} |
|
348 |
* passing {@code this} as the argument. |
|
349 |
* Whether the range can be obtained is determined by the field. |
|
350 |
* <p> |
|
351 |
* The range of valid Japanese eras can change over time due to the nature |
|
352 |
* of the Japanese calendar system. |
|
353 |
* |
|
354 |
* @param field the field to query the range for, not null |
|
355 |
* @return the range of valid values for the field, not null |
|
356 |
* @throws DateTimeException if the range for the field cannot be obtained |
|
357 |
* @throws UnsupportedTemporalTypeException if the unit is not supported |
|
358 |
*/ |
|
359 |
@Override // override as super would return range from 0 to 1 |
|
360 |
public ValueRange range(TemporalField field) { |
|
361 |
if (field == ERA) { |
|
362 |
return JapaneseChronology.INSTANCE.range(ERA); |
|
363 |
} |
|
364 |
return Era.super.range(field); |
|
15658 | 365 |
} |
366 |
||
367 |
//----------------------------------------------------------------------- |
|
368 |
String getAbbreviation() { |
|
42696
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|
369 |
return ERA_CONFIG[ordinal(getValue())].getAbbreviation(); |
15658 | 370 |
} |
371 |
||
372 |
String getName() { |
|
19030 | 373 |
return ERA_CONFIG[ordinal(getValue())].getName(); |
15658 | 374 |
} |
375 |
||
376 |
@Override |
|
377 |
public String toString() { |
|
378 |
return getName(); |
|
379 |
} |
|
380 |
||
381 |
//----------------------------------------------------------------------- |
|
19841
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
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19427
diff
changeset
|
382 |
/** |
22081 | 383 |
* Defend against malicious streams. |
384 |
* |
|
22566 | 385 |
* @param s the stream to read |
22081 | 386 |
* @throws InvalidObjectException always |
387 |
*/ |
|
388 |
private void readObject(ObjectInputStream s) throws InvalidObjectException { |
|
389 |
throw new InvalidObjectException("Deserialization via serialization delegate"); |
|
390 |
} |
|
391 |
||
392 |
//----------------------------------------------------------------------- |
|
393 |
/** |
|
19841
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
394 |
* Writes the object using a |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
395 |
* <a href="../../../serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>. |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
396 |
* @serialData |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
397 |
* <pre> |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
398 |
* out.writeByte(5); // identifies a JapaneseEra |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
399 |
* out.writeInt(getValue()); |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
400 |
* </pre> |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
401 |
* |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
402 |
* @return the instance of {@code Ser}, not null |
15c8e97d6a14
8024164: JSR310 serialization should be described in details
rriggs
parents:
19427
diff
changeset
|
403 |
*/ |
15658 | 404 |
private Object writeReplace() { |
405 |
return new Ser(Ser.JAPANESE_ERA_TYPE, this); |
|
406 |
} |
|
407 |
||
408 |
void writeExternal(DataOutput out) throws IOException { |
|
409 |
out.writeByte(this.getValue()); |
|
410 |
} |
|
411 |
||
412 |
static JapaneseEra readExternal(DataInput in) throws IOException { |
|
413 |
byte eraValue = in.readByte(); |
|
414 |
return JapaneseEra.of(eraValue); |
|
415 |
} |
|
416 |
||
417 |
} |