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1 /* |
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2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 /* |
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27 * This file is available under and governed by the GNU General Public |
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28 * License version 2 only, as published by the Free Software Foundation. |
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29 * However, the following notice accompanied the original version of this |
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30 * file: |
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31 * |
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32 * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos |
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33 * |
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34 * All rights reserved. |
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35 * |
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36 * Redistribution and use in source and binary forms, with or without |
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37 * modification, are permitted provided that the following conditions are met: |
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38 * |
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39 * * Redistributions of source code must retain the above copyright notice, |
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40 * this list of conditions and the following disclaimer. |
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41 * |
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42 * * Redistributions in binary form must reproduce the above copyright notice, |
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43 * this list of conditions and the following disclaimer in the documentation |
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44 * and/or other materials provided with the distribution. |
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45 * |
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46 * * Neither the name of JSR-310 nor the names of its contributors |
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47 * may be used to endorse or promote products derived from this software |
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48 * without specific prior written permission. |
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49 * |
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50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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54 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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55 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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56 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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57 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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58 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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59 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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60 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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61 */ |
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62 package java.time.chrono; |
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63 |
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64 import java.time.DateTimeException; |
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65 |
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66 /** |
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67 * An era in the Thai Buddhist calendar system. |
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68 * <p> |
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69 * The Thai Buddhist calendar system has two eras. |
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70 * The current era, for years from 1 onwards, is known as the 'Buddhist' era. |
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71 * All previous years, zero or earlier in the proleptic count or one and greater |
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72 * in the year-of-era count, are part of the 'Before Buddhist' era. |
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73 * |
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74 * <table summary="Buddhist years and eras" cellpadding="2" cellspacing="3" border="0" > |
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75 * <thead> |
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76 * <tr class="tableSubHeadingColor"> |
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77 * <th class="colFirst" align="left">year-of-era</th> |
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78 * <th class="colFirst" align="left">era</th> |
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79 * <th class="colFirst" align="left">proleptic-year</th> |
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80 * <th class="colLast" align="left">ISO proleptic-year</th> |
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81 * </tr> |
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82 * </thead> |
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83 * <tbody> |
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84 * <tr class="rowColor"> |
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85 * <td>2</td><td>BE</td><td>2</td><td>-542</td> |
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86 * </tr> |
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87 * <tr class="altColor"> |
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88 * <td>1</td><td>BE</td><td>1</td><td>-543</td> |
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89 * </tr> |
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90 * <tr class="rowColor"> |
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91 * <td>1</td><td>BEFORE_BE</td><td>0</td><td>-544</td> |
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92 * </tr> |
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93 * <tr class="altColor"> |
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94 * <td>2</td><td>BEFORE_BE</td><td>-1</td><td>-545</td> |
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95 * </tr> |
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96 * </tbody> |
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97 * </table> |
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98 * <p> |
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99 * <b>Do not use {@code ordinal()} to obtain the numeric representation of {@code ThaiBuddhistEra}. |
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100 * Use {@code getValue()} instead.</b> |
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101 * |
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102 * @implSpec |
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103 * This is an immutable and thread-safe enum. |
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104 * |
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105 * @since 1.8 |
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106 */ |
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107 public enum ThaiBuddhistEra implements Era { |
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108 |
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109 /** |
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110 * The singleton instance for the era before the current one, 'Before Buddhist Era', |
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111 * which has the numeric value 0. |
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112 */ |
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113 BEFORE_BE, |
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114 /** |
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115 * The singleton instance for the current era, 'Buddhist Era', |
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116 * which has the numeric value 1. |
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117 */ |
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118 BE; |
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119 |
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120 //----------------------------------------------------------------------- |
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121 /** |
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122 * Obtains an instance of {@code ThaiBuddhistEra} from an {@code int} value. |
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123 * <p> |
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124 * {@code ThaiBuddhistEra} is an enum representing the Thai Buddhist eras of BEFORE_BE/BE. |
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125 * This factory allows the enum to be obtained from the {@code int} value. |
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126 * |
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127 * @param thaiBuddhistEra the era to represent, from 0 to 1 |
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128 * @return the BuddhistEra singleton, never null |
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129 * @throws DateTimeException if the era is invalid |
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130 */ |
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131 public static ThaiBuddhistEra of(int thaiBuddhistEra) { |
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132 switch (thaiBuddhistEra) { |
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133 case 0: |
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134 return BEFORE_BE; |
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135 case 1: |
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136 return BE; |
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137 default: |
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138 throw new DateTimeException("Invalid era: " + thaiBuddhistEra); |
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139 } |
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140 } |
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141 |
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142 //----------------------------------------------------------------------- |
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143 /** |
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144 * Gets the numeric era {@code int} value. |
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145 * <p> |
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146 * The era BEFORE_BE has the value 0, while the era BE has the value 1. |
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147 * |
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148 * @return the era value, from 0 (BEFORE_BE) to 1 (BE) |
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149 */ |
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150 @Override |
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151 public int getValue() { |
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152 return ordinal(); |
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153 } |
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154 |
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155 } |