1 /*

     2  * Copyright (c) 2012, 2013, 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  * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos

    28  *

    29  * All rights reserved.

    30  *

    31  * Redistribution and use in source and binary forms, with or without

    32  * modification, are permitted provided that the following conditions are met:

    33  *

    34  *  * Redistributions of source code must retain the above copyright notice,

    35  *    this list of conditions and the following disclaimer.

    36  *

    37  *  * Redistributions in binary form must reproduce the above copyright notice,

    38  *    this list of conditions and the following disclaimer in the documentation

    39  *    and/or other materials provided with the distribution.

    40  *

    41  *  * Neither the name of JSR-310 nor the names of its contributors

    42  *    may be used to endorse or promote products derived from this software

    43  *    without specific prior written permission.

    44  *

    45  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    46  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    47  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

    48  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

    49  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    50  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    51  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    52  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

    53  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

    54  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

    55  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    56  */

    57 package java.time.chrono;

    58 

    59 import java.io.DataInput;

    60 import java.io.DataOutput;

    61 import java.io.IOException;

    62 import java.time.DateTimeException;

    63 

    64 /**

    65  * An era in the Minguo calendar system.

    66  * <p>

    67  * The Minguo calendar system has two eras.

    68  * The date {@code 0001-01-01 (Minguo)} is equal to {@code 1912-01-01 (ISO)}.

    69  * <p>

    70  * <b>Do not use {@code ordinal()} to obtain the numeric representation of {@code MinguoEra}.

    71  * Use {@code getValue()} instead.</b>

    72  *

    73  * <h3>Specification for implementors</h3>

    74  * This is an immutable and thread-safe enum.

    75  *

    76  * @since 1.8

    77  */

    78 enum MinguoEra implements Era  {

    79 

    80     /**

    81      * The singleton instance for the era BEFORE_ROC, 'Before Republic of China'.

    82      * This has the numeric value of {@code 0}.

    83      */

    84     BEFORE_ROC,

    85     /**

    86      * The singleton instance for the era ROC, 'Republic of China'.

    87      * This has the numeric value of {@code 1}.

    88      */

    89     ROC;

    90 

    91     //-----------------------------------------------------------------------

    92     /**

    93      * Obtains an instance of {@code MinguoEra} from an {@code int} value.

    94      * <p>

    95      * {@code MinguoEra} is an enum representing the Minguo eras of BEFORE_ROC/ROC.

    96      * This factory allows the enum to be obtained from the {@code int} value.

    97      *

    98      * @param era  the BEFORE_ROC/ROC value to represent, from 0 (BEFORE_ROC) to 1 (ROC)

    99      * @return the era singleton, not null

   100      * @throws DateTimeException if the value is invalid

   101      */

   102     public static MinguoEra of(int era) {

   103         switch (era) {

   104             case 0:

   105                 return BEFORE_ROC;

   106             case 1:

   107                 return ROC;

   108             default:

   109                 throw new DateTimeException("Invalid era: " + era);

   110         }

   111     }

   112 

   113     //-----------------------------------------------------------------------

   114     /**

   115      * Gets the numeric era {@code int} value.

   116      * <p>

   117      * The era BEFORE_ROC has the value 0, while the era ROC has the value 1.

   118      *

   119      * @return the era value, from 0 (BEFORE_ROC) to 1 (ROC)

   120      */

   121     @Override

   122     public int getValue() {

   123         return ordinal();

   124     }

   125 

   126     @Override

   127     public MinguoChronology getChronology() {

   128         return MinguoChronology.INSTANCE;

   129     }

   130 

   131     // JDK8 default methods:

   132     //-----------------------------------------------------------------------

   133     @Override

   134     public MinguoDate date(int year, int month, int day) {

   135         return (MinguoDate)(getChronology().date(this, year, month, day));

   136     }

   137 

   138     @Override

   139     public MinguoDate dateYearDay(int year, int dayOfYear) {

   140         return (MinguoDate)(getChronology().dateYearDay(this, year, dayOfYear));

   141     }

   142 

   143     //-------------------------------------------------------------------------

   144     private Object writeReplace() {

   145         return new Ser(Ser.MINGUO_ERA_TYPE, this);

   146     }

   147 

   148     void writeExternal(DataOutput out) throws IOException {

   149         out.writeByte(this.getValue());

   150     }

   151 

   152     static MinguoEra readExternal(DataInput in) throws IOException {

   153         byte eraValue = in.readByte();

   154         return MinguoEra.of(eraValue);

   155     }

   156 

   157 }