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.calendar;

    58 

    59 import static java.time.temporal.ChronoField.ERA;

    60 

    61 import java.io.DataInput;

    62 import java.io.DataOutput;

    63 import java.io.IOException;

    64 import java.time.DateTimeException;

    65 import java.time.format.DateTimeFormatterBuilder;

    66 import java.time.format.TextStyle;

    67 import java.time.temporal.ChronoField;

    68 import java.time.temporal.ChronoLocalDate;

    69 import java.time.temporal.Era;

    70 import java.time.temporal.Temporal;

    71 import java.time.temporal.TemporalField;

    72 import java.time.temporal.ValueRange;

    73 import java.util.Locale;

    74 

    75 /**

    76  * An era in the Thai Buddhist calendar system.

    77  * <p>

    78  * The Thai Buddhist calendar system has two eras.

    79  * <p>

    80  * <b>Do not use ordinal() to obtain the numeric representation of a ThaiBuddhistEra

    81  * instance. Use getValue() instead.</b>

    82  *

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

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

    85  *

    86  * @since 1.8

    87  */

    88 enum ThaiBuddhistEra implements Era<ThaiBuddhistChrono> {

    89 

    90     /**

    91      * The singleton instance for the era before the current one, 'Before Buddhist Era',

    92      * which has the value 0.

    93      */

    94     BEFORE_BE,

    95     /**

    96      * The singleton instance for the current era, 'Buddhist Era', which has the value 1.

    97      */

    98     BE;

    99 

   100     //-----------------------------------------------------------------------

   101     /**

   102      * Obtains an instance of {@code ThaiBuddhistEra} from a value.

   103      * <p>

   104      * The current era (from ISO year -543 onwards) has the value 1

   105      * The previous era has the value 0.

   106      *

   107      * @param thaiBuddhistEra  the era to represent, from 0 to 1

   108      * @return the BuddhistEra singleton, never null

   109      * @throws IllegalCalendarFieldValueException if the era is invalid

   110      */

   111     public static ThaiBuddhistEra of(int thaiBuddhistEra) {

   112         switch (thaiBuddhistEra) {

   113             case 0:

   114                 return BEFORE_BE;

   115             case 1:

   116                 return BE;

   117             default:

   118                 throw new DateTimeException("Era is not valid for ThaiBuddhistEra");

   119         }

   120     }

   121 

   122     //-----------------------------------------------------------------------

   123     /**

   124      * Gets the era numeric value.

   125      * <p>

   126      * The current era (from ISO year -543 onwards) has the value 1

   127      * The previous era has the value 0.

   128      *

   129      * @return the era value, from 0 (BEFORE_BE) to 1 (BE)

   130      */

   131     @Override

   132     public int getValue() {

   133         return ordinal();

   134     }

   135 

   136     @Override

   137     public ThaiBuddhistChrono getChrono() {

   138         return ThaiBuddhistChrono.INSTANCE;

   139     }

   140 

   141     // JDK8 default methods:

   142     //-----------------------------------------------------------------------

   143     @Override

   144     public ChronoLocalDate<ThaiBuddhistChrono> date(int year, int month, int day) {

   145         return getChrono().date(this, year, month, day);

   146     }

   147 

   148     @Override

   149     public ChronoLocalDate<ThaiBuddhistChrono> dateYearDay(int year, int dayOfYear) {

   150         return getChrono().dateYearDay(this, year, dayOfYear);

   151     }

   152 

   153     //-----------------------------------------------------------------------

   154     @Override

   155     public boolean isSupported(TemporalField field) {

   156         if (field instanceof ChronoField) {

   157             return field == ERA;

   158         }

   159         return field != null && field.doIsSupported(this);

   160     }

   161 

   162     @Override

   163     public ValueRange range(TemporalField field) {

   164         if (field == ERA) {

   165             return field.range();

   166         } else if (field instanceof ChronoField) {

   167             throw new DateTimeException("Unsupported field: " + field.getName());

   168         }

   169         return field.doRange(this);

   170     }

   171 

   172     @Override

   173     public int get(TemporalField field) {

   174         if (field == ERA) {

   175             return getValue();

   176         }

   177         return range(field).checkValidIntValue(getLong(field), field);

   178     }

   179 

   180     @Override

   181     public long getLong(TemporalField field) {

   182         if (field == ERA) {

   183             return getValue();

   184         } else if (field instanceof ChronoField) {

   185             throw new DateTimeException("Unsupported field: " + field.getName());

   186         }

   187         return field.doGet(this);

   188     }

   189 

   190     //-------------------------------------------------------------------------

   191     @Override

   192     public Temporal adjustInto(Temporal temporal) {

   193         return temporal.with(ERA, getValue());

   194     }

   195 

   196     //-----------------------------------------------------------------------

   197     @Override

   198     public String getText(TextStyle style, Locale locale) {

   199         return new DateTimeFormatterBuilder().appendText(ERA, style).toFormatter(locale).print(this);

   200     }

   201 

   202     //-----------------------------------------------------------------------

   203     private Object writeReplace() {

   204         return new Ser(Ser.THAIBUDDHIST_ERA_TYPE, this);

   205     }

   206 

   207     void writeExternal(DataOutput out) throws IOException {

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

   209     }

   210 

   211     static ThaiBuddhistEra readExternal(DataInput in) throws IOException {

   212         byte eraValue = in.readByte();

   213         return ThaiBuddhistEra.of(eraValue);

   214     }

   215 

   216 }