--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/time/chrono/HijrahDate.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,698 @@
+/*
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * * Neither the name of JSR-310 nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package java.time.chrono;
+
+import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH;
+import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_YEAR;
+import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_MONTH;
+import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_YEAR;
+import static java.time.temporal.ChronoField.DAY_OF_MONTH;
+import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
+import static java.time.temporal.ChronoField.YEAR;
+
+import java.io.IOException;
+import java.io.InvalidObjectException;
+import java.io.ObjectInput;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutput;
+import java.io.Serializable;
+import java.time.Clock;
+import java.time.DateTimeException;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.time.ZoneId;
+import java.time.temporal.ChronoField;
+import java.time.temporal.TemporalAccessor;
+import java.time.temporal.TemporalAdjuster;
+import java.time.temporal.TemporalAmount;
+import java.time.temporal.TemporalField;
+import java.time.temporal.TemporalQuery;
+import java.time.temporal.TemporalUnit;
+import java.time.temporal.UnsupportedTemporalTypeException;
+import java.time.temporal.ValueRange;
+
+/**
+ * A date in the Hijrah calendar system.
+ * <p>
+ * This date operates using one of several variants of the
+ * {@linkplain HijrahChronology Hijrah calendar}.
+ * <p>
+ * The Hijrah calendar has a different total of days in a year than
+ * Gregorian calendar, and the length of each month is based on the period
+ * of a complete revolution of the moon around the earth
+ * (as between successive new moons).
+ * Refer to the {@link HijrahChronology} for details of supported variants.
+ * <p>
+ * Each HijrahDate is created bound to a particular HijrahChronology,
+ * The same chronology is propagated to each HijrahDate computed from the date.
+ * To use a different Hijrah variant, its HijrahChronology can be used
+ * to create new HijrahDate instances.
+ * Alternatively, the {@link #withVariant} method can be used to convert
+ * to a new HijrahChronology.
+ *
+ * <p>
+ * This is a <a href="{@docRoot}/java/lang/doc-files/ValueBased.html">value-based</a>
+ * class; use of identity-sensitive operations (including reference equality
+ * ({@code ==}), identity hash code, or synchronization) on instances of
+ * {@code HijrahDate} may have unpredictable results and should be avoided.
+ * The {@code equals} method should be used for comparisons.
+ *
+ * @implSpec
+ * This class is immutable and thread-safe.
+ *
+ * @since 1.8
+ */
+public final class HijrahDate
+ extends ChronoLocalDateImpl<HijrahDate>
+ implements ChronoLocalDate, Serializable {
+
+ /**
+ * Serialization version.
+ */
+ private static final long serialVersionUID = -5207853542612002020L;
+ /**
+ * The Chronology of this HijrahDate.
+ */
+ private final transient HijrahChronology chrono;
+ /**
+ * The proleptic year.
+ */
+ private final transient int prolepticYear;
+ /**
+ * The month-of-year.
+ */
+ private final transient int monthOfYear;
+ /**
+ * The day-of-month.
+ */
+ private final transient int dayOfMonth;
+
+ //-------------------------------------------------------------------------
+ /**
+ * Obtains an instance of {@code HijrahDate} from the Hijrah proleptic year,
+ * month-of-year and day-of-month.
+ *
+ * @param prolepticYear the proleptic year to represent in the Hijrah calendar
+ * @param monthOfYear the month-of-year to represent, from 1 to 12
+ * @param dayOfMonth the day-of-month to represent, from 1 to 30
+ * @return the Hijrah date, never null
+ * @throws DateTimeException if the value of any field is out of range
+ */
+ static HijrahDate of(HijrahChronology chrono, int prolepticYear, int monthOfYear, int dayOfMonth) {
+ return new HijrahDate(chrono, prolepticYear, monthOfYear, dayOfMonth);
+ }
+
+ /**
+ * Returns a HijrahDate for the chronology and epochDay.
+ * @param chrono The Hijrah chronology
+ * @param epochDay the epoch day
+ * @return a HijrahDate for the epoch day; non-null
+ */
+ static HijrahDate ofEpochDay(HijrahChronology chrono, long epochDay) {
+ return new HijrahDate(chrono, epochDay);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Obtains the current {@code HijrahDate} of the Islamic Umm Al-Qura calendar
+ * in the default time-zone.
+ * <p>
+ * This will query the {@link Clock#systemDefaultZone() system clock} in the default
+ * time-zone to obtain the current date.
+ * <p>
+ * Using this method will prevent the ability to use an alternate clock for testing
+ * because the clock is hard-coded.
+ *
+ * @return the current date using the system clock and default time-zone, not null
+ */
+ public static HijrahDate now() {
+ return now(Clock.systemDefaultZone());
+ }
+
+ /**
+ * Obtains the current {@code HijrahDate} of the Islamic Umm Al-Qura calendar
+ * in the specified time-zone.
+ * <p>
+ * This will query the {@link Clock#system(ZoneId) system clock} to obtain the current date.
+ * Specifying the time-zone avoids dependence on the default time-zone.
+ * <p>
+ * Using this method will prevent the ability to use an alternate clock for testing
+ * because the clock is hard-coded.
+ *
+ * @param zone the zone ID to use, not null
+ * @return the current date using the system clock, not null
+ */
+ public static HijrahDate now(ZoneId zone) {
+ return now(Clock.system(zone));
+ }
+
+ /**
+ * Obtains the current {@code HijrahDate} of the Islamic Umm Al-Qura calendar
+ * from the specified clock.
+ * <p>
+ * This will query the specified clock to obtain the current date - today.
+ * Using this method allows the use of an alternate clock for testing.
+ * The alternate clock may be introduced using {@linkplain Clock dependency injection}.
+ *
+ * @param clock the clock to use, not null
+ * @return the current date, not null
+ * @throws DateTimeException if the current date cannot be obtained
+ */
+ public static HijrahDate now(Clock clock) {
+ return HijrahDate.ofEpochDay(HijrahChronology.INSTANCE, LocalDate.now(clock).toEpochDay());
+ }
+
+ /**
+ * Obtains a {@code HijrahDate} of the Islamic Umm Al-Qura calendar
+ * from the proleptic-year, month-of-year and day-of-month fields.
+ * <p>
+ * This returns a {@code HijrahDate} with the specified fields.
+ * The day must be valid for the year and month, otherwise an exception will be thrown.
+ *
+ * @param prolepticYear the Hijrah proleptic-year
+ * @param month the Hijrah month-of-year, from 1 to 12
+ * @param dayOfMonth the Hijrah day-of-month, from 1 to 30
+ * @return the date in Hijrah calendar system, not null
+ * @throws DateTimeException if the value of any field is out of range,
+ * or if the day-of-month is invalid for the month-year
+ */
+ public static HijrahDate of(int prolepticYear, int month, int dayOfMonth) {
+ return HijrahChronology.INSTANCE.date(prolepticYear, month, dayOfMonth);
+ }
+
+ /**
+ * Obtains a {@code HijrahDate} of the Islamic Umm Al-Qura calendar from a temporal object.
+ * <p>
+ * This obtains a date in the Hijrah calendar system based on the specified temporal.
+ * A {@code TemporalAccessor} represents an arbitrary set of date and time information,
+ * which this factory converts to an instance of {@code HijrahDate}.
+ * <p>
+ * The conversion typically uses the {@link ChronoField#EPOCH_DAY EPOCH_DAY}
+ * field, which is standardized across calendar systems.
+ * <p>
+ * This method matches the signature of the functional interface {@link TemporalQuery}
+ * allowing it to be used as a query via method reference, {@code HijrahDate::from}.
+ *
+ * @param temporal the temporal object to convert, not null
+ * @return the date in Hijrah calendar system, not null
+ * @throws DateTimeException if unable to convert to a {@code HijrahDate}
+ */
+ public static HijrahDate from(TemporalAccessor temporal) {
+ return HijrahChronology.INSTANCE.date(temporal);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Constructs an {@code HijrahDate} with the proleptic-year, month-of-year and
+ * day-of-month fields.
+ *
+ * @param chrono The chronology to create the date with
+ * @param prolepticYear the proleptic year
+ * @param monthOfYear the month of year
+ * @param dayOfMonth the day of month
+ */
+ private HijrahDate(HijrahChronology chrono, int prolepticYear, int monthOfYear, int dayOfMonth) {
+ // Computing the Gregorian day checks the valid ranges
+ chrono.getEpochDay(prolepticYear, monthOfYear, dayOfMonth);
+
+ this.chrono = chrono;
+ this.prolepticYear = prolepticYear;
+ this.monthOfYear = monthOfYear;
+ this.dayOfMonth = dayOfMonth;
+ }
+
+ /**
+ * Constructs an instance with the Epoch Day.
+ *
+ * @param epochDay the epochDay
+ */
+ private HijrahDate(HijrahChronology chrono, long epochDay) {
+ int[] dateInfo = chrono.getHijrahDateInfo((int)epochDay);
+
+ this.chrono = chrono;
+ this.prolepticYear = dateInfo[0];
+ this.monthOfYear = dateInfo[1];
+ this.dayOfMonth = dateInfo[2];
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Gets the chronology of this date, which is the Hijrah calendar system.
+ * <p>
+ * The {@code Chronology} represents the calendar system in use.
+ * The era and other fields in {@link ChronoField} are defined by the chronology.
+ *
+ * @return the Hijrah chronology, not null
+ */
+ @Override
+ public HijrahChronology getChronology() {
+ return chrono;
+ }
+
+ /**
+ * Gets the era applicable at this date.
+ * <p>
+ * The Hijrah calendar system has one era, 'AH',
+ * defined by {@link HijrahEra}.
+ *
+ * @return the era applicable at this date, not null
+ */
+ @Override
+ public HijrahEra getEra() {
+ return HijrahEra.AH;
+ }
+
+ /**
+ * Returns the length of the month represented by this date.
+ * <p>
+ * This returns the length of the month in days.
+ * Month lengths in the Hijrah calendar system vary between 29 and 30 days.
+ *
+ * @return the length of the month in days
+ */
+ @Override
+ public int lengthOfMonth() {
+ return chrono.getMonthLength(prolepticYear, monthOfYear);
+ }
+
+ /**
+ * Returns the length of the year represented by this date.
+ * <p>
+ * This returns the length of the year in days.
+ * A Hijrah calendar system year is typically shorter than
+ * that of the ISO calendar system.
+ *
+ * @return the length of the year in days
+ */
+ @Override
+ public int lengthOfYear() {
+ return chrono.getYearLength(prolepticYear);
+ }
+
+ //-----------------------------------------------------------------------
+ @Override
+ public ValueRange range(TemporalField field) {
+ if (field instanceof ChronoField) {
+ if (isSupported(field)) {
+ ChronoField f = (ChronoField) field;
+ switch (f) {
+ case DAY_OF_MONTH: return ValueRange.of(1, lengthOfMonth());
+ case DAY_OF_YEAR: return ValueRange.of(1, lengthOfYear());
+ case ALIGNED_WEEK_OF_MONTH: return ValueRange.of(1, 5); // TODO
+ // TODO does the limited range of valid years cause years to
+ // start/end part way through? that would affect range
+ }
+ return getChronology().range(f);
+ }
+ throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
+ }
+ return field.rangeRefinedBy(this);
+ }
+
+ @Override
+ public long getLong(TemporalField field) {
+ if (field instanceof ChronoField) {
+ switch ((ChronoField) field) {
+ case DAY_OF_WEEK: return getDayOfWeek();
+ case ALIGNED_DAY_OF_WEEK_IN_MONTH: return ((getDayOfWeek() - 1) % 7) + 1;
+ case ALIGNED_DAY_OF_WEEK_IN_YEAR: return ((getDayOfYear() - 1) % 7) + 1;
+ case DAY_OF_MONTH: return this.dayOfMonth;
+ case DAY_OF_YEAR: return this.getDayOfYear();
+ case EPOCH_DAY: return toEpochDay();
+ case ALIGNED_WEEK_OF_MONTH: return ((dayOfMonth - 1) / 7) + 1;
+ case ALIGNED_WEEK_OF_YEAR: return ((getDayOfYear() - 1) / 7) + 1;
+ case MONTH_OF_YEAR: return monthOfYear;
+ case PROLEPTIC_MONTH: return getProlepticMonth();
+ case YEAR_OF_ERA: return prolepticYear;
+ case YEAR: return prolepticYear;
+ case ERA: return getEraValue();
+ }
+ throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
+ }
+ return field.getFrom(this);
+ }
+
+ private long getProlepticMonth() {
+ return prolepticYear * 12L + monthOfYear - 1;
+ }
+
+ @Override
+ public HijrahDate with(TemporalField field, long newValue) {
+ if (field instanceof ChronoField) {
+ ChronoField f = (ChronoField) field;
+ // not using checkValidIntValue so EPOCH_DAY and PROLEPTIC_MONTH work
+ chrono.range(f).checkValidValue(newValue, f); // TODO: validate value
+ int nvalue = (int) newValue;
+ switch (f) {
+ case DAY_OF_WEEK: return plusDays(newValue - getDayOfWeek());
+ case ALIGNED_DAY_OF_WEEK_IN_MONTH: return plusDays(newValue - getLong(ALIGNED_DAY_OF_WEEK_IN_MONTH));
+ case ALIGNED_DAY_OF_WEEK_IN_YEAR: return plusDays(newValue - getLong(ALIGNED_DAY_OF_WEEK_IN_YEAR));
+ case DAY_OF_MONTH: return resolvePreviousValid(prolepticYear, monthOfYear, nvalue);
+ case DAY_OF_YEAR: return plusDays(Math.min(nvalue, lengthOfYear()) - getDayOfYear());
+ case EPOCH_DAY: return new HijrahDate(chrono, newValue);
+ case ALIGNED_WEEK_OF_MONTH: return plusDays((newValue - getLong(ALIGNED_WEEK_OF_MONTH)) * 7);
+ case ALIGNED_WEEK_OF_YEAR: return plusDays((newValue - getLong(ALIGNED_WEEK_OF_YEAR)) * 7);
+ case MONTH_OF_YEAR: return resolvePreviousValid(prolepticYear, nvalue, dayOfMonth);
+ case PROLEPTIC_MONTH: return plusMonths(newValue - getProlepticMonth());
+ case YEAR_OF_ERA: return resolvePreviousValid(prolepticYear >= 1 ? nvalue : 1 - nvalue, monthOfYear, dayOfMonth);
+ case YEAR: return resolvePreviousValid(nvalue, monthOfYear, dayOfMonth);
+ case ERA: return resolvePreviousValid(1 - prolepticYear, monthOfYear, dayOfMonth);
+ }
+ throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
+ }
+ return super.with(field, newValue);
+ }
+
+ private HijrahDate resolvePreviousValid(int prolepticYear, int month, int day) {
+ int monthDays = chrono.getMonthLength(prolepticYear, month);
+ if (day > monthDays) {
+ day = monthDays;
+ }
+ return HijrahDate.of(chrono, prolepticYear, month, day);
+ }
+
+ /**
+ * {@inheritDoc}
+ * @throws DateTimeException if unable to make the adjustment.
+ * For example, if the adjuster requires an ISO chronology
+ * @throws ArithmeticException {@inheritDoc}
+ */
+ @Override
+ public HijrahDate with(TemporalAdjuster adjuster) {
+ return super.with(adjuster);
+ }
+
+ /**
+ * Returns a {@code HijrahDate} with the Chronology requested.
+ * <p>
+ * The year, month, and day are checked against the new requested
+ * HijrahChronology. If the chronology has a shorter month length
+ * for the month, the day is reduced to be the last day of the month.
+ *
+ * @param chronology the new HijrahChonology, non-null
+ * @return a HijrahDate with the requested HijrahChronology, non-null
+ */
+ public HijrahDate withVariant(HijrahChronology chronology) {
+ if (chrono == chronology) {
+ return this;
+ }
+ // Like resolvePreviousValid the day is constrained to stay in the same month
+ int monthDays = chronology.getDayOfYear(prolepticYear, monthOfYear);
+ return HijrahDate.of(chronology, prolepticYear, monthOfYear,(dayOfMonth > monthDays) ? monthDays : dayOfMonth );
+ }
+
+ /**
+ * {@inheritDoc}
+ * @throws DateTimeException {@inheritDoc}
+ * @throws ArithmeticException {@inheritDoc}
+ */
+ @Override
+ public HijrahDate plus(TemporalAmount amount) {
+ return super.plus(amount);
+ }
+
+ /**
+ * {@inheritDoc}
+ * @throws DateTimeException {@inheritDoc}
+ * @throws ArithmeticException {@inheritDoc}
+ */
+ @Override
+ public HijrahDate minus(TemporalAmount amount) {
+ return super.minus(amount);
+ }
+
+ @Override
+ public long toEpochDay() {
+ return chrono.getEpochDay(prolepticYear, monthOfYear, dayOfMonth);
+ }
+
+ /**
+ * Gets the day-of-year field.
+ * <p>
+ * This method returns the primitive {@code int} value for the day-of-year.
+ *
+ * @return the day-of-year
+ */
+ private int getDayOfYear() {
+ return chrono.getDayOfYear(prolepticYear, monthOfYear) + dayOfMonth;
+ }
+
+ /**
+ * Gets the day-of-week value.
+ *
+ * @return the day-of-week; computed from the epochday
+ */
+ private int getDayOfWeek() {
+ int dow0 = (int)Math.floorMod(toEpochDay() + 3, 7);
+ return dow0 + 1;
+ }
+
+ /**
+ * Gets the Era of this date.
+ *
+ * @return the Era of this date; computed from epochDay
+ */
+ private int getEraValue() {
+ return (prolepticYear > 1 ? 1 : 0);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Checks if the year is a leap year, according to the Hijrah calendar system rules.
+ *
+ * @return true if this date is in a leap year
+ */
+ @Override
+ public boolean isLeapYear() {
+ return chrono.isLeapYear(prolepticYear);
+ }
+
+ //-----------------------------------------------------------------------
+ @Override
+ HijrahDate plusYears(long years) {
+ if (years == 0) {
+ return this;
+ }
+ int newYear = Math.addExact(this.prolepticYear, (int)years);
+ return resolvePreviousValid(newYear, monthOfYear, dayOfMonth);
+ }
+
+ @Override
+ HijrahDate plusMonths(long monthsToAdd) {
+ if (monthsToAdd == 0) {
+ return this;
+ }
+ long monthCount = prolepticYear * 12L + (monthOfYear - 1);
+ long calcMonths = monthCount + monthsToAdd; // safe overflow
+ int newYear = chrono.checkValidYear(Math.floorDiv(calcMonths, 12L));
+ int newMonth = (int)Math.floorMod(calcMonths, 12L) + 1;
+ return resolvePreviousValid(newYear, newMonth, dayOfMonth);
+ }
+
+ @Override
+ HijrahDate plusWeeks(long weeksToAdd) {
+ return super.plusWeeks(weeksToAdd);
+ }
+
+ @Override
+ HijrahDate plusDays(long days) {
+ return new HijrahDate(chrono, toEpochDay() + days);
+ }
+
+ @Override
+ public HijrahDate plus(long amountToAdd, TemporalUnit unit) {
+ return super.plus(amountToAdd, unit);
+ }
+
+ @Override
+ public HijrahDate minus(long amountToSubtract, TemporalUnit unit) {
+ return super.minus(amountToSubtract, unit);
+ }
+
+ @Override
+ HijrahDate minusYears(long yearsToSubtract) {
+ return super.minusYears(yearsToSubtract);
+ }
+
+ @Override
+ HijrahDate minusMonths(long monthsToSubtract) {
+ return super.minusMonths(monthsToSubtract);
+ }
+
+ @Override
+ HijrahDate minusWeeks(long weeksToSubtract) {
+ return super.minusWeeks(weeksToSubtract);
+ }
+
+ @Override
+ HijrahDate minusDays(long daysToSubtract) {
+ return super.minusDays(daysToSubtract);
+ }
+
+ @Override // for javadoc and covariant return type
+ @SuppressWarnings("unchecked")
+ public final ChronoLocalDateTime<HijrahDate> atTime(LocalTime localTime) {
+ return (ChronoLocalDateTime<HijrahDate>)super.atTime(localTime);
+ }
+
+ @Override
+ public ChronoPeriod until(ChronoLocalDate endDate) {
+ // TODO: untested
+ HijrahDate end = getChronology().date(endDate);
+ long totalMonths = (end.prolepticYear - this.prolepticYear) * 12 + (end.monthOfYear - this.monthOfYear); // safe
+ int days = end.dayOfMonth - this.dayOfMonth;
+ if (totalMonths > 0 && days < 0) {
+ totalMonths--;
+ HijrahDate calcDate = this.plusMonths(totalMonths);
+ days = (int) (end.toEpochDay() - calcDate.toEpochDay()); // safe
+ } else if (totalMonths < 0 && days > 0) {
+ totalMonths++;
+ days -= end.lengthOfMonth();
+ }
+ long years = totalMonths / 12; // safe
+ int months = (int) (totalMonths % 12); // safe
+ return getChronology().period(Math.toIntExact(years), months, days);
+ }
+
+ //-------------------------------------------------------------------------
+ /**
+ * Compares this date to another date, including the chronology.
+ * <p>
+ * Compares this {@code HijrahDate} with another ensuring that the date is the same.
+ * <p>
+ * Only objects of type {@code HijrahDate} are compared, other types return false.
+ * To compare the dates of two {@code TemporalAccessor} instances, including dates
+ * in two different chronologies, use {@link ChronoField#EPOCH_DAY} as a comparator.
+ *
+ * @param obj the object to check, null returns false
+ * @return true if this is equal to the other date and the Chronologies are equal
+ */
+ @Override // override for performance
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj instanceof HijrahDate) {
+ HijrahDate otherDate = (HijrahDate) obj;
+ return prolepticYear == otherDate.prolepticYear
+ && this.monthOfYear == otherDate.monthOfYear
+ && this.dayOfMonth == otherDate.dayOfMonth
+ && getChronology().equals(otherDate.getChronology());
+ }
+ return false;
+ }
+
+ /**
+ * A hash code for this date.
+ *
+ * @return a suitable hash code based only on the Chronology and the date
+ */
+ @Override // override for performance
+ public int hashCode() {
+ int yearValue = prolepticYear;
+ int monthValue = monthOfYear;
+ int dayValue = dayOfMonth;
+ return getChronology().getId().hashCode() ^ (yearValue & 0xFFFFF800)
+ ^ ((yearValue << 11) + (monthValue << 6) + (dayValue));
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Defend against malicious streams.
+ *
+ * @param s the stream to read
+ * @throws InvalidObjectException always
+ */
+ private void readObject(ObjectInputStream s) throws InvalidObjectException {
+ throw new InvalidObjectException("Deserialization via serialization delegate");
+ }
+
+ /**
+ * Writes the object using a
+ * <a href="../../../serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
+ * @serialData
+ * <pre>
+ * out.writeByte(6); // identifies a HijrahDate
+ * out.writeObject(chrono); // the HijrahChronology variant
+ * out.writeInt(get(YEAR));
+ * out.writeByte(get(MONTH_OF_YEAR));
+ * out.writeByte(get(DAY_OF_MONTH));
+ * </pre>
+ *
+ * @return the instance of {@code Ser}, not null
+ */
+ private Object writeReplace() {
+ return new Ser(Ser.HIJRAH_DATE_TYPE, this);
+ }
+
+ void writeExternal(ObjectOutput out) throws IOException {
+ // HijrahChronology is implicit in the Hijrah_DATE_TYPE
+ out.writeObject(getChronology());
+ out.writeInt(get(YEAR));
+ out.writeByte(get(MONTH_OF_YEAR));
+ out.writeByte(get(DAY_OF_MONTH));
+ }
+
+ static HijrahDate readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
+ HijrahChronology chrono = (HijrahChronology) in.readObject();
+ int year = in.readInt();
+ int month = in.readByte();
+ int dayOfMonth = in.readByte();
+ return chrono.date(year, month, dayOfMonth);
+ }
+
+}