1 /* 2 * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* 27 * This file is available under and governed by the GNU General Public 28 * License version 2 only, as published by the Free Software Foundation. 29 * However, the following notice accompanied the original version of this 30 * file: 31 * 32 * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos 33 * 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions are met: 38 * 39 * * Redistributions of source code must retain the above copyright notice, 40 * this list of conditions and the following disclaimer. 41 * 42 * * Redistributions in binary form must reproduce the above copyright notice, 43 * this list of conditions and the following disclaimer in the documentation 44 * and/or other materials provided with the distribution. 45 * 46 * * Neither the name of JSR-310 nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 54 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 55 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 56 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 57 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 58 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 59 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 60 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61 */ 62 package java.time.chrono; 63 64 import static java.time.temporal.ChronoField.ERA; 65 66 import java.time.DateTimeException; 67 import java.time.format.DateTimeFormatterBuilder; 68 import java.time.format.TextStyle; 69 import java.util.Locale; 70 71 /** 72 * An era in the Thai Buddhist calendar system. 73 * <p> 74 * The Thai Buddhist calendar system has two eras. 75 * The current era, for years from 1 onwards, is known as the 'Buddhist' era. 76 * All previous years, zero or earlier in the proleptic count or one and greater 77 * in the year-of-era count, are part of the 'Before Buddhist' era. 78 * 79 * <table class="striped" style="text-align:left"> 80 * <caption style="display:none">Buddhist years and eras</caption> 81 * <thead> 82 * <tr> 83 * <th scope="col">year-of-era</th> 84 * <th scope="col">era</th> 85 * <th scope="col">proleptic-year</th> 86 * <th scope="col">ISO proleptic-year</th> 87 * </tr> 88 * </thead> 89 * <tbody> 90 * <tr> 91 * <td>2</td><td>BE</td><th scope="row">2</th><td>-542</td> 92 * </tr> 93 * <tr> 94 * <td>1</td><td>BE</td><th scope="row">1</th><td>-543</td> 95 * </tr> 96 * <tr> 97 * <td>1</td><td>BEFORE_BE</td><th scope="row">0</th><td>-544</td> 98 * </tr> 99 * <tr> 100 * <td>2</td><td>BEFORE_BE</td><th scope="row">-1</th><td>-545</td> 101 * </tr> 102 * </tbody> 103 * </table> 104 * <p> 105 * <b>Do not use {@code ordinal()} to obtain the numeric representation of {@code ThaiBuddhistEra}. 106 * Use {@code getValue()} instead.</b> 107 * 108 * @implSpec 109 * This is an immutable and thread-safe enum. 110 * 111 * @since 1.8 112 */ 113 public enum ThaiBuddhistEra implements Era { 114 115 /** 116 * The singleton instance for the era before the current one, 'Before Buddhist Era', 117 * which has the numeric value 0. 118 */ 119 BEFORE_BE, 120 /** 121 * The singleton instance for the current era, 'Buddhist Era', 122 * which has the numeric value 1. 123 */ 124 BE; 125 126 //----------------------------------------------------------------------- 127 /** 128 * Obtains an instance of {@code ThaiBuddhistEra} from an {@code int} value. 129 * <p> 130 * {@code ThaiBuddhistEra} is an enum representing the Thai Buddhist eras of BEFORE_BE/BE. 131 * This factory allows the enum to be obtained from the {@code int} value. 132 * 133 * @param thaiBuddhistEra the era to represent, from 0 to 1 134 * @return the BuddhistEra singleton, never null 135 * @throws DateTimeException if the era is invalid 136 */ of(int thaiBuddhistEra)137 public static ThaiBuddhistEra of(int thaiBuddhistEra) { 138 switch (thaiBuddhistEra) { 139 case 0: 140 return BEFORE_BE; 141 case 1: 142 return BE; 143 default: 144 throw new DateTimeException("Invalid era: " + thaiBuddhistEra); 145 } 146 } 147 148 //----------------------------------------------------------------------- 149 /** 150 * Gets the numeric era {@code int} value. 151 * <p> 152 * The era BEFORE_BE has the value 0, while the era BE has the value 1. 153 * 154 * @return the era value, from 0 (BEFORE_BE) to 1 (BE) 155 */ 156 @Override getValue()157 public int getValue() { 158 return ordinal(); 159 } 160 161 /** 162 * {@inheritDoc} 163 * 164 * @param style {@inheritDoc} 165 * @param locale {@inheritDoc} 166 */ 167 @Override getDisplayName(TextStyle style, Locale locale)168 public String getDisplayName(TextStyle style, Locale locale) { 169 return new DateTimeFormatterBuilder() 170 .appendText(ERA, style) 171 .toFormatter(locale) 172 .withChronology(ThaiBuddhistChronology.INSTANCE) 173 .format(this == BE ? ThaiBuddhistDate.of(1, 1, 1) : ThaiBuddhistDate.of(0, 1, 1)); 174 } 175 176 } 177