1 /*
2 * Copyright (c) 2012, 2023, 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
75 import java.time.ZoneId;
76 import java.time.temporal.ChronoField;
77 import java.time.temporal.TemporalAccessor;
78 import java.time.temporal.TemporalAdjuster;
79 import java.time.temporal.TemporalAmount;
80 import java.time.temporal.TemporalField;
81 import java.time.temporal.TemporalQuery;
82 import java.time.temporal.TemporalUnit;
83 import java.time.temporal.UnsupportedTemporalTypeException;
84 import java.time.temporal.ValueRange;
85 import java.util.Objects;
86
87 /**
88 * A date in the Minguo calendar system.
89 * <p>
90 * This date operates using the {@linkplain MinguoChronology Minguo calendar}.
91 * This calendar system is primarily used in the Republic of China, often known as Taiwan.
92 * Dates are aligned such that {@code 0001-01-01 (Minguo)} is {@code 1912-01-01 (ISO)}.
93 * <p>
94 * This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>
95 * class; programmers should treat instances that are
96 * {@linkplain #equals(Object) equal} as interchangeable and should not
97 * use instances for synchronization, or unpredictable behavior may
98 * occur. For example, in a future release, synchronization may fail.
99 * The {@code equals} method should be used for comparisons.
100 *
101 * @implSpec
102 * This class is immutable and thread-safe.
103 *
104 * @since 1.8
105 */
106 @jdk.internal.ValueBased
107 public final class MinguoDate
108 extends ChronoLocalDateImpl<MinguoDate>
109 implements ChronoLocalDate, Serializable {
110
111 /**
112 * Serialization version.
113 */
114 @java.io.Serial
115 private static final long serialVersionUID = 1300372329181994526L;
116
117 /**
118 * The underlying date.
119 */
120 private final transient LocalDate isoDate;
121
122 //-----------------------------------------------------------------------
123 /**
124 * Obtains the current {@code MinguoDate} from the system clock in the default time-zone.
125 * <p>
126 * This will query the {@link Clock#systemDefaultZone() system clock} in the default
127 * time-zone to obtain the current date.
461 }
462
463 /**
464 * A hash code for this date.
465 *
466 * @return a suitable hash code based only on the Chronology and the date
467 */
468 @Override // override for performance
469 public int hashCode() {
470 return getChronology().getId().hashCode() ^ isoDate.hashCode();
471 }
472
473 //-----------------------------------------------------------------------
474 /**
475 * Defend against malicious streams.
476 *
477 * @param s the stream to read
478 * @throws InvalidObjectException always
479 */
480 @java.io.Serial
481 private void readObject(ObjectInputStream s) throws InvalidObjectException {
482 throw new InvalidObjectException("Deserialization via serialization delegate");
483 }
484
485 /**
486 * Writes the object using a
487 * <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
488 * @serialData
489 * <pre>
490 * out.writeByte(8); // identifies a MinguoDate
491 * out.writeInt(get(YEAR));
492 * out.writeByte(get(MONTH_OF_YEAR));
493 * out.writeByte(get(DAY_OF_MONTH));
494 * </pre>
495 *
496 * @return the instance of {@code Ser}, not null
497 */
498 @java.io.Serial
499 private Object writeReplace() {
500 return new Ser(Ser.MINGUO_DATE_TYPE, this);
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1 /*
2 * Copyright (c) 2012, 2026, 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
75 import java.time.ZoneId;
76 import java.time.temporal.ChronoField;
77 import java.time.temporal.TemporalAccessor;
78 import java.time.temporal.TemporalAdjuster;
79 import java.time.temporal.TemporalAmount;
80 import java.time.temporal.TemporalField;
81 import java.time.temporal.TemporalQuery;
82 import java.time.temporal.TemporalUnit;
83 import java.time.temporal.UnsupportedTemporalTypeException;
84 import java.time.temporal.ValueRange;
85 import java.util.Objects;
86
87 /**
88 * A date in the Minguo calendar system.
89 * <p>
90 * This date operates using the {@linkplain MinguoChronology Minguo calendar}.
91 * This calendar system is primarily used in the Republic of China, often known as Taiwan.
92 * Dates are aligned such that {@code 0001-01-01 (Minguo)} is {@code 1912-01-01 (ISO)}.
93 * <p>
94 * This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>
95 * class; programmers should treat instances that are {@linkplain #equals(Object) equal}
96 * as interchangeable and should not use instances for synchronization or
97 * with {@linkplain java.lang.ref.Reference object references}.
98 *
99 * <div class="preview-block">
100 * <div class="preview-comment">
101 * When preview features are enabled, {@code MinguoDate} is a {@linkplain Class#isValue value class}.
102 * Use of value class instances for synchronization or with
103 * {@linkplain java.lang.ref.Reference object references} result in
104 * {@link IdentityException}.
105 * </div>
106 * </div>
107 *
108 * @implSpec
109 * This class is immutable and thread-safe.
110 *
111 * @since 1.8
112 */
113 @jdk.internal.ValueBased
114 public final /*value*/ class MinguoDate
115 extends ChronoLocalDateImpl<MinguoDate>
116 implements ChronoLocalDate, Serializable {
117
118 /**
119 * Serialization version.
120 */
121 @java.io.Serial
122 private static final long serialVersionUID = 1300372329181994526L;
123
124 /**
125 * The underlying date.
126 */
127 private final transient LocalDate isoDate;
128
129 //-----------------------------------------------------------------------
130 /**
131 * Obtains the current {@code MinguoDate} from the system clock in the default time-zone.
132 * <p>
133 * This will query the {@link Clock#systemDefaultZone() system clock} in the default
134 * time-zone to obtain the current date.
468 }
469
470 /**
471 * A hash code for this date.
472 *
473 * @return a suitable hash code based only on the Chronology and the date
474 */
475 @Override // override for performance
476 public int hashCode() {
477 return getChronology().getId().hashCode() ^ isoDate.hashCode();
478 }
479
480 //-----------------------------------------------------------------------
481 /**
482 * Defend against malicious streams.
483 *
484 * @param s the stream to read
485 * @throws InvalidObjectException always
486 */
487 @java.io.Serial
488 @SuppressWarnings("serial") // this method is not invoked for value classes
489 private void readObject(ObjectInputStream s) throws InvalidObjectException {
490 throw new InvalidObjectException("Deserialization via serialization delegate");
491 }
492
493 /**
494 * Writes the object using a
495 * <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
496 * @serialData
497 * <pre>
498 * out.writeByte(8); // identifies a MinguoDate
499 * out.writeInt(get(YEAR));
500 * out.writeByte(get(MONTH_OF_YEAR));
501 * out.writeByte(get(DAY_OF_MONTH));
502 * </pre>
503 *
504 * @return the instance of {@code Ser}, not null
505 */
506 @java.io.Serial
507 private Object writeReplace() {
508 return new Ser(Ser.MINGUO_DATE_TYPE, this);
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