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.calendar.ThaiBuddhistChrono.YEARS_DIFFERENCE;

    60 import static java.time.temporal.ChronoField.DAY_OF_MONTH;

    61 import static java.time.temporal.ChronoField.MONTH_OF_YEAR;

    62 import static java.time.temporal.ChronoField.YEAR;

    63 

    64 import java.io.DataInput;

    65 import java.io.DataOutput;

    66 import java.io.IOException;

    67 import java.io.Serializable;

    68 import java.time.DateTimeException;

    69 import java.time.LocalDate;

    70 import java.time.temporal.ChronoField;

    71 import java.time.temporal.ChronoLocalDate;

    72 import java.time.temporal.TemporalField;

    73 import java.time.temporal.ValueRange;

    74 import java.util.Objects;

    75 

    76 /**

    77  * A date in the Thai Buddhist calendar system.

    78  * <p>

    79  * This implements {@code ChronoLocalDate} for the {@link ThaiBuddhistChrono Thai Buddhist calendar}.

    80  *

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

    82  * This class is immutable and thread-safe.

    83  *

    84  * @since 1.8

    85  */

    86 final class ThaiBuddhistDate

    87         extends ChronoDateImpl<ThaiBuddhistChrono>

    88         implements ChronoLocalDate<ThaiBuddhistChrono>, Serializable {

    89     // this class is package-scoped so that future conversion to public

    90     // would not change serialization

    91 

    92     /**

    93      * Serialization version.

    94      */

    95     private static final long serialVersionUID = -8722293800195731463L;

    96 

    97     /**

    98      * The underlying date.

    99      */

   100     private final LocalDate isoDate;

   101 

   102     /**

   103      * Creates an instance from an ISO date.

   104      *

   105      * @param isoDate  the standard local date, validated not null

   106      */

   107     ThaiBuddhistDate(LocalDate isoDate) {

   108         Objects.requireNonNull(isoDate, "isoDate");

   109         this.isoDate = isoDate;

   110     }

   111 

   112     //-----------------------------------------------------------------------

   113     @Override

   114     public ThaiBuddhistChrono getChrono() {

   115         return ThaiBuddhistChrono.INSTANCE;

   116     }

   117 

   118     @Override

   119     public int lengthOfMonth() {

   120         return isoDate.lengthOfMonth();

   121     }

   122 

   123     @Override

   124     public ValueRange range(TemporalField field) {

   125         if (field instanceof ChronoField) {

   126             if (isSupported(field)) {

   127                 ChronoField f = (ChronoField) field;

   128                 switch (f) {

   129                     case DAY_OF_MONTH:

   130                     case DAY_OF_YEAR:

   131                     case ALIGNED_WEEK_OF_MONTH:

   132                         return isoDate.range(field);

   133                     case YEAR_OF_ERA: {

   134                         ValueRange range = YEAR.range();

   135                         long max = (getProlepticYear() <= 0 ? -(range.getMinimum() + YEARS_DIFFERENCE) + 1 : range.getMaximum() + YEARS_DIFFERENCE);

   136                         return ValueRange.of(1, max);

   137                     }

   138                 }

   139                 return getChrono().range(f);

   140             }

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

   142         }

   143         return field.doRange(this);

   144     }

   145 

   146     @Override

   147     public long getLong(TemporalField field) {

   148         if (field instanceof ChronoField) {

   149             switch ((ChronoField) field) {

   150                 case YEAR_OF_ERA: {

   151                     int prolepticYear = getProlepticYear();

   152                     return (prolepticYear >= 1 ? prolepticYear : 1 - prolepticYear);

   153                 }

   154                 case YEAR:

   155                     return getProlepticYear();

   156                 case ERA:

   157                     return (getProlepticYear() >= 1 ? 1 : 0);

   158             }

   159             return isoDate.getLong(field);

   160         }

   161         return field.doGet(this);

   162     }

   163 

   164     private int getProlepticYear() {

   165         return isoDate.getYear() + YEARS_DIFFERENCE;

   166     }

   167 

   168     //-----------------------------------------------------------------------

   169     @Override

   170     public ThaiBuddhistDate with(TemporalField field, long newValue) {

   171         if (field instanceof ChronoField) {

   172             ChronoField f = (ChronoField) field;

   173             if (getLong(f) == newValue) {

   174                 return this;

   175             }

   176             switch (f) {

   177                 case YEAR_OF_ERA:

   178                 case YEAR:

   179                 case ERA: {

   180                     f.checkValidValue(newValue);

   181                     int nvalue = (int) newValue;

   182                     switch (f) {

   183                         case YEAR_OF_ERA:

   184                             return with(isoDate.withYear((getProlepticYear() >= 1 ? nvalue : 1 - nvalue)  - YEARS_DIFFERENCE));

   185                         case YEAR:

   186                             return with(isoDate.withYear(nvalue - YEARS_DIFFERENCE));

   187                         case ERA:

   188                             return with(isoDate.withYear((1 - getProlepticYear()) - YEARS_DIFFERENCE));

   189                     }

   190                 }

   191             }

   192             return with(isoDate.with(field, newValue));

   193         }

   194         return (ThaiBuddhistDate) ChronoLocalDate.super.with(field, newValue);

   195     }

   196 

   197     //-----------------------------------------------------------------------

   198     @Override

   199     ThaiBuddhistDate plusYears(long years) {

   200         return with(isoDate.plusYears(years));

   201     }

   202 

   203     @Override

   204     ThaiBuddhistDate plusMonths(long months) {

   205         return with(isoDate.plusMonths(months));

   206     }

   207 

   208     @Override

   209     ThaiBuddhistDate plusDays(long days) {

   210         return with(isoDate.plusDays(days));

   211     }

   212 

   213     private ThaiBuddhistDate with(LocalDate newDate) {

   214         return (newDate.equals(isoDate) ? this : new ThaiBuddhistDate(newDate));

   215     }

   216 

   217     @Override  // override for performance

   218     public long toEpochDay() {

   219         return isoDate.toEpochDay();

   220     }

   221 

   222     //-------------------------------------------------------------------------

   223     @Override  // override for performance

   224     public boolean equals(Object obj) {

   225         if (this == obj) {

   226             return true;

   227         }

   228         if (obj instanceof ThaiBuddhistDate) {

   229             ThaiBuddhistDate otherDate = (ThaiBuddhistDate) obj;

   230             return this.isoDate.equals(otherDate.isoDate);

   231         }

   232         return false;

   233     }

   234 

   235     @Override  // override for performance

   236     public int hashCode() {

   237         return getChrono().getId().hashCode() ^ isoDate.hashCode();

   238     }

   239 

   240     //-----------------------------------------------------------------------

   241     private Object writeReplace() {

   242         return new Ser(Ser.THAIBUDDHIST_DATE_TYPE, this);

   243     }

   244 

   245     void writeExternal(DataOutput out) throws IOException {

   246         // MinguoChrono is implicit in the THAIBUDDHIST_DATE_TYPE

   247         out.writeInt(this.get(YEAR));

   248         out.writeByte(this.get(MONTH_OF_YEAR));

   249         out.writeByte(this.get(DAY_OF_MONTH));

   250     }

   251 

   252     static ChronoLocalDate<ThaiBuddhistChrono> readExternal(DataInput in) throws IOException {

   253         int year = in.readInt();

   254         int month = in.readByte();

   255         int dayOfMonth = in.readByte();

   256         return ThaiBuddhistChrono.INSTANCE.date(year, month, dayOfMonth);

   257     }

   258 

   259 }