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
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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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, mutexes, 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, mutexes, 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 @jdk.internal.MigratedValueClass
115 public final class MinguoDate
116 extends ChronoLocalDateImpl<MinguoDate>
117 implements ChronoLocalDate, Serializable {
118
119 /**
120 * Serialization version.
121 */
122 @java.io.Serial
123 private static final long serialVersionUID = 1300372329181994526L;
124
125 /**
126 * The underlying date.
127 */
128 private final transient LocalDate isoDate;
129
130 //-----------------------------------------------------------------------
131 /**
132 * Obtains the current {@code MinguoDate} from the system clock in the default time-zone.
133 * <p>
134 * This will query the {@link Clock#systemDefaultZone() system clock} in the default
469 }
470
471 /**
472 * A hash code for this date.
473 *
474 * @return a suitable hash code based only on the Chronology and the date
475 */
476 @Override // override for performance
477 public int hashCode() {
478 return getChronology().getId().hashCode() ^ isoDate.hashCode();
479 }
480
481 //-----------------------------------------------------------------------
482 /**
483 * Defend against malicious streams.
484 *
485 * @param s the stream to read
486 * @throws InvalidObjectException always
487 */
488 @java.io.Serial
489 @SuppressWarnings("serial") // this method is not invoked for value classes
490 private void readObject(ObjectInputStream s) throws InvalidObjectException {
491 throw new InvalidObjectException("Deserialization via serialization delegate");
492 }
493
494 /**
495 * Writes the object using a
496 * <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
497 * @serialData
498 * <pre>
499 * out.writeByte(8); // identifies a MinguoDate
500 * out.writeInt(get(YEAR));
501 * out.writeByte(get(MONTH_OF_YEAR));
502 * out.writeByte(get(DAY_OF_MONTH));
503 * </pre>
504 *
505 * @return the instance of {@code Ser}, not null
506 */
507 @java.io.Serial
508 private Object writeReplace() {
509 return new Ser(Ser.MINGUO_DATE_TYPE, this);
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