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	/*
	* 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.chrono.MinguoChronology.YEARS_DIFFERENCE;
	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.DataInput;
	import java.io.DataOutput;
	import java.io.IOException;
	import java.io.InvalidObjectException;
	import java.io.ObjectInputStream;
	import java.io.Serializable;
	import java.time.Clock;
	import java.time.DateTimeException;
	import java.time.LocalDate;
	import java.time.LocalTime;
	import java.time.Period;
	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;
	import java.util.Objects;

	/**
	* A date in the Minguo calendar system.
	* <p>
	* This date operates using the {@linkplain MinguoChronology Minguo calendar}.
	* This calendar system is primarily used in the Republic of China, often known as Taiwan.
	* Dates are aligned such that {@code 0001-01-01 (Minguo)} is {@code 1912-01-01 (ISO)}.
	*
	* <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 MinguoDate} 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 MinguoDate
	extends ChronoLocalDateImpl<MinguoDate>
	implements ChronoLocalDate, Serializable {

	/**
	* Serialization version.
	*/
	private static final long serialVersionUID = 1300372329181994526L;

	/**
	* The underlying date.
	*/
	private final transient LocalDate isoDate;

	//-----------------------------------------------------------------------
	/**
	* Obtains the current {@code MinguoDate} from the system clock 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 MinguoDate now() {
	return now(Clock.systemDefaultZone());
	}

	/**
	* Obtains the current {@code MinguoDate} from the system clock 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 MinguoDate now(ZoneId zone) {
	return now(Clock.system(zone));
	}

	/**
	* Obtains the current {@code MinguoDate} 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 MinguoDate now(Clock clock) {
	return new MinguoDate(LocalDate.now(clock));
	}

	/**
	* Obtains a {@code MinguoDate} representing a date in the Minguo calendar
	* system from the proleptic-year, month-of-year and day-of-month fields.
	* <p>
	* This returns a {@code MinguoDate} with the specified fields.
	* The day must be valid for the year and month, otherwise an exception will be thrown.
	*
	* @param prolepticYear the Minguo proleptic-year
	* @param month the Minguo month-of-year, from 1 to 12
	* @param dayOfMonth the Minguo day-of-month, from 1 to 31
	* @return the date in Minguo 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 MinguoDate of(int prolepticYear, int month, int dayOfMonth) {
	return new MinguoDate(LocalDate.of(prolepticYear + YEARS_DIFFERENCE, month, dayOfMonth));
	}

	/**
	* Obtains a {@code MinguoDate} from a temporal object.
	* <p>
	* This obtains a date in the Minguo 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 MinguoDate}.
	* <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 MinguoDate::from}.
	*
	* @param temporal the temporal object to convert, not null
	* @return the date in Minguo calendar system, not null
	* @throws DateTimeException if unable to convert to a {@code MinguoDate}
	*/
	public static MinguoDate from(TemporalAccessor temporal) {
	return MinguoChronology.INSTANCE.date(temporal);
	}

	//-----------------------------------------------------------------------
	/**
	* Creates an instance from an ISO date.
	*
	* @param isoDate the standard local date, validated not null
	*/
	MinguoDate(LocalDate isoDate) {
	Objects.requireNonNull(isoDate, "isoDate");
	this.isoDate = isoDate;
	}

	//-----------------------------------------------------------------------
	/**
	* Gets the chronology of this date, which is the Minguo 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 Minguo chronology, not null
	*/
	@Override
	public MinguoChronology getChronology() {
	return MinguoChronology.INSTANCE;
	}

	/**
	* Gets the era applicable at this date.
	* <p>
	* The Minguo calendar system has two eras, 'ROC' and 'BEFORE_ROC',
	* defined by {@link MinguoEra}.
	*
	* @return the era applicable at this date, not null
	*/
	@Override
	public MinguoEra getEra() {
	return (getProlepticYear() >= 1 ? MinguoEra.ROC : MinguoEra.BEFORE_ROC);
	}

	/**
	* Returns the length of the month represented by this date.
	* <p>
	* This returns the length of the month in days.
	* Month lengths match those of the ISO calendar system.
	*
	* @return the length of the month in days
	*/
	@Override
	public int lengthOfMonth() {
	return isoDate.lengthOfMonth();
	}

	//-----------------------------------------------------------------------
	@Override
	public ValueRange range(TemporalField field) {
	if (field instanceof ChronoField) {
	if (isSupported(field)) {
	ChronoField f = (ChronoField) field;
	switch (f) {
	case DAY_OF_MONTH:
	case DAY_OF_YEAR:
	case ALIGNED_WEEK_OF_MONTH:
	return isoDate.range(field);
	case YEAR_OF_ERA: {
	ValueRange range = YEAR.range();
	long max = (getProlepticYear() <= 0 ? -range.getMinimum() + 1 + YEARS_DIFFERENCE : range.getMaximum() - YEARS_DIFFERENCE);
	return ValueRange.of(1, max);
	}
	}
	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 PROLEPTIC_MONTH:
	return getProlepticMonth();
	case YEAR_OF_ERA: {
	int prolepticYear = getProlepticYear();
	return (prolepticYear >= 1 ? prolepticYear : 1 - prolepticYear);
	}
	case YEAR:
	return getProlepticYear();
	case ERA:
	return (getProlepticYear() >= 1 ? 1 : 0);
	}
	return isoDate.getLong(field);
	}
	return field.getFrom(this);
	}

	private long getProlepticMonth() {
	return getProlepticYear() * 12L + isoDate.getMonthValue() - 1;
	}

	private int getProlepticYear() {
	return isoDate.getYear() - YEARS_DIFFERENCE;
	}

	//-----------------------------------------------------------------------
	@Override
	public MinguoDate with(TemporalField field, long newValue) {
	if (field instanceof ChronoField) {
	ChronoField f = (ChronoField) field;
	if (getLong(f) == newValue) {
	return this;
	}
	switch (f) {
	case PROLEPTIC_MONTH:
	getChronology().range(f).checkValidValue(newValue, f);
	return plusMonths(newValue - getProlepticMonth());
	case YEAR_OF_ERA:
	case YEAR:
	case ERA: {
	int nvalue = getChronology().range(f).checkValidIntValue(newValue, f);
	switch (f) {
	case YEAR_OF_ERA:
	return with(isoDate.withYear(getProlepticYear() >= 1 ? nvalue + YEARS_DIFFERENCE : (1 - nvalue) + YEARS_DIFFERENCE));
	case YEAR:
	return with(isoDate.withYear(nvalue + YEARS_DIFFERENCE));
	case ERA:
	return with(isoDate.withYear((1 - getProlepticYear()) + YEARS_DIFFERENCE));
	}
	}
	}
	return with(isoDate.with(field, newValue));
	}
	return super.with(field, newValue);
	}

	/**
	* {@inheritDoc}
	* @throws DateTimeException {@inheritDoc}
	* @throws ArithmeticException {@inheritDoc}
	*/
	@Override
	public MinguoDate with(TemporalAdjuster adjuster) {
	return super.with(adjuster);
	}

	/**
	* {@inheritDoc}
	* @throws DateTimeException {@inheritDoc}
	* @throws ArithmeticException {@inheritDoc}
	*/
	@Override
	public MinguoDate plus(TemporalAmount amount) {
	return super.plus(amount);
	}

	/**
	* {@inheritDoc}
	* @throws DateTimeException {@inheritDoc}
	* @throws ArithmeticException {@inheritDoc}
	*/
	@Override
	public MinguoDate minus(TemporalAmount amount) {
	return super.minus(amount);
	}

	//-----------------------------------------------------------------------
	@Override
	MinguoDate plusYears(long years) {
	return with(isoDate.plusYears(years));
	}

	@Override
	MinguoDate plusMonths(long months) {
	return with(isoDate.plusMonths(months));
	}

	@Override
	MinguoDate plusWeeks(long weeksToAdd) {
	return super.plusWeeks(weeksToAdd);
	}

	@Override
	MinguoDate plusDays(long days) {
	return with(isoDate.plusDays(days));
	}

	@Override
	public MinguoDate plus(long amountToAdd, TemporalUnit unit) {
	return super.plus(amountToAdd, unit);
	}

	@Override
	public MinguoDate minus(long amountToAdd, TemporalUnit unit) {
	return super.minus(amountToAdd, unit);
	}

	@Override
	MinguoDate minusYears(long yearsToSubtract) {
	return super.minusYears(yearsToSubtract);
	}

	@Override
	MinguoDate minusMonths(long monthsToSubtract) {
	return super.minusMonths(monthsToSubtract);
	}

	@Override
	MinguoDate minusWeeks(long weeksToSubtract) {
	return super.minusWeeks(weeksToSubtract);
	}

	@Override
	MinguoDate minusDays(long daysToSubtract) {
	return super.minusDays(daysToSubtract);
	}

	private MinguoDate with(LocalDate newDate) {
	return (newDate.equals(isoDate) ? this : new MinguoDate(newDate));
	}

	@Override // for javadoc and covariant return type
	@SuppressWarnings("unchecked")
	public final ChronoLocalDateTime<MinguoDate> atTime(LocalTime localTime) {
	return (ChronoLocalDateTime<MinguoDate>)super.atTime(localTime);
	}

	@Override
	public ChronoPeriod until(ChronoLocalDate endDate) {
	Period period = isoDate.until(endDate);
	return getChronology().period(period.getYears(), period.getMonths(), period.getDays());
	}

	@Override // override for performance
	public long toEpochDay() {
	return isoDate.toEpochDay();
	}

	//-------------------------------------------------------------------------
	/**
	* Compares this date to another date, including the chronology.
	* <p>
	* Compares this {@code MinguoDate} with another ensuring that the date is the same.
	* <p>
	* Only objects of type {@code MinguoDate} 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
	*/
	@Override // override for performance
	public boolean equals(Object obj) {
	if (this == obj) {
	return true;
	}
	if (obj instanceof MinguoDate) {
	MinguoDate otherDate = (MinguoDate) obj;
	return this.isoDate.equals(otherDate.isoDate);
	}
	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() {
	return getChronology().getId().hashCode() ^ isoDate.hashCode();
	}

	//-----------------------------------------------------------------------
	/**
	* 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(8); // identifies a MinguoDate
	* 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.MINGUO_DATE_TYPE, this);
	}

	void writeExternal(DataOutput out) throws IOException {
	// MinguoChronology is implicit in the MINGUO_DATE_TYPE
	out.writeInt(get(YEAR));
	out.writeByte(get(MONTH_OF_YEAR));
	out.writeByte(get(DAY_OF_MONTH));
	}

	static MinguoDate readExternal(DataInput in) throws IOException {
	int year = in.readInt();
	int month = in.readByte();
	int dayOfMonth = in.readByte();
	return MinguoChronology.INSTANCE.date(year, month, dayOfMonth);
	}

	}

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