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/*
 * 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
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package java.time.chrono;

import static java.time.chrono.ThaiBuddhistChronology.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 Thai Buddhist calendar system.

 This date operates using the Thai Buddhist calendar. This calendar system is primarily used in Thailand. Dates are aligned such that 2484-01-01 (Buddhist) is 1941-01-01 (ISO). 

This is a value-based class; use of identity-sensitive operations (including reference equality (==), identity hash code, or synchronization) on instances of ThaiBuddhistDate may have unpredictable results and should be avoided. The equals method should be used for comparisons. 
Implementation Requirements:
This class is immutable and thread-safe.
Since:1.8
/**
 * A date in the Thai Buddhist calendar system.
 * <p>
 * This date operates using the {@linkplain ThaiBuddhistChronology Thai Buddhist calendar}.
 * This calendar system is primarily used in Thailand.
 * Dates are aligned such that {@code 2484-01-01 (Buddhist)} is {@code 1941-01-01 (ISO)}.
 *
 * <p>
 * This is a <a href="{@docRoot}/java.base/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 ThaiBuddhistDate} 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 ThaiBuddhistDate
        extends ChronoLocalDateImpl<ThaiBuddhistDate>
        implements ChronoLocalDate, Serializable {

    
Serialization version.

/**
     * Serialization version.
     */
    private static final long serialVersionUID = -8722293800195731463L;

    
The underlying date.

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

    //-----------------------------------------------------------------------
    
Obtains the current ThaiBuddhistDate from the system clock in the default time-zone. 
 This will query the system clock in the default time-zone to obtain the current date. 

Using this method will prevent the ability to use an alternate clock for testing
because the clock is hard-coded.

Returns:the current date using the system clock and default time-zone, not null
/**
     * Obtains the current {@code ThaiBuddhistDate} 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 ThaiBuddhistDate now() {
        return now(Clock.systemDefaultZone());
    }

    
Obtains the current ThaiBuddhistDate from the system clock in the specified time-zone. 
 This will query the system clock to obtain the current date. Specifying the time-zone avoids dependence on the default time-zone. 

Using this method will prevent the ability to use an alternate clock for testing
because the clock is hard-coded.

Params:
  • zone –  the zone ID to use, not null
Returns:the current date using the system clock, not null
/**
     * Obtains the current {@code ThaiBuddhistDate} 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 ThaiBuddhistDate now(ZoneId zone) {
        return now(Clock.system(zone));
    }

    
Obtains the current ThaiBuddhistDate from the specified clock. 
 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 dependency injection. 
Params:
  • clock –  the clock to use, not null
Throws:
Returns:the current date, not null
/**
     * Obtains the current {@code ThaiBuddhistDate} 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 ThaiBuddhistDate now(Clock clock) {
        return new ThaiBuddhistDate(LocalDate.now(clock));
    }

    
Obtains a ThaiBuddhistDate representing a date in the Thai Buddhist calendar system from the proleptic-year, month-of-year and day-of-month fields. 
 This returns a ThaiBuddhistDate with the specified fields. The day must be valid for the year and month, otherwise an exception will be thrown. 
Params:
  • prolepticYear –  the Thai Buddhist proleptic-year
  • month –  the Thai Buddhist month-of-year, from 1 to 12
  • dayOfMonth –  the Thai Buddhist day-of-month, from 1 to 31
Throws:
  • DateTimeException – if the value of any field is out of range,
 or if the day-of-month is invalid for the month-year
Returns:the date in Thai Buddhist calendar system, not null
/**
     * Obtains a {@code ThaiBuddhistDate} representing a date in the Thai Buddhist calendar
     * system from the proleptic-year, month-of-year and day-of-month fields.
     * <p>
     * This returns a {@code ThaiBuddhistDate} with the specified fields.
     * The day must be valid for the year and month, otherwise an exception will be thrown.
     *
     * @param prolepticYear  the Thai Buddhist proleptic-year
     * @param month  the Thai Buddhist month-of-year, from 1 to 12
     * @param dayOfMonth  the Thai Buddhist day-of-month, from 1 to 31
     * @return the date in Thai Buddhist 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 ThaiBuddhistDate of(int prolepticYear, int month, int dayOfMonth) {
        return new ThaiBuddhistDate(LocalDate.of(prolepticYear - YEARS_DIFFERENCE, month, dayOfMonth));
    }

    
Obtains a ThaiBuddhistDate from a temporal object. 
 This obtains a date in the Thai Buddhist calendar system based on the specified temporal. A TemporalAccessor represents an arbitrary set of date and time information, which this factory converts to an instance of ThaiBuddhistDate. 
 The conversion typically uses the EPOCH_DAY field, which is standardized across calendar systems. 
 This method matches the signature of the functional interface TemporalQuery allowing it to be used as a query via method reference, ThaiBuddhistDate::from. 
Params:
  • temporal –  the temporal object to convert, not null
Throws:
Returns:the date in Thai Buddhist calendar system, not null
/**
     * Obtains a {@code ThaiBuddhistDate} from a temporal object.
     * <p>
     * This obtains a date in the Thai Buddhist 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 ThaiBuddhistDate}.
     * <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 ThaiBuddhistDate::from}.
     *
     * @param temporal  the temporal object to convert, not null
     * @return the date in Thai Buddhist calendar system, not null
     * @throws DateTimeException if unable to convert to a {@code ThaiBuddhistDate}
     */
    public static ThaiBuddhistDate from(TemporalAccessor temporal) {
        return ThaiBuddhistChronology.INSTANCE.date(temporal);
    }

    //-----------------------------------------------------------------------
    
Creates an instance from an ISO date.

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

    //-----------------------------------------------------------------------
    
Gets the chronology of this date, which is the Thai Buddhist calendar system.

 The Chronology represents the calendar system in use. The era and other fields in ChronoField are defined by the chronology. 
Returns:the Thai Buddhist chronology, not null
/**
     * Gets the chronology of this date, which is the Thai Buddhist 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 Thai Buddhist chronology, not null
     */
    @Override
    public ThaiBuddhistChronology getChronology() {
        return ThaiBuddhistChronology.INSTANCE;
    }

    
Gets the era applicable at this date.

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

    
Returns the length of the month represented by this date.


This returns the length of the month in days.
Month lengths match those of the ISO calendar system.

Returns:the length of the month in days
/**
     * 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() + YEARS_DIFFERENCE) + 1 : 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 ThaiBuddhistDate 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 : 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:
/**
     * {@inheritDoc}
     * @throws DateTimeException {@inheritDoc}
     * @throws ArithmeticException {@inheritDoc}
     */
    @Override
    public  ThaiBuddhistDate with(TemporalAdjuster adjuster) {
        return super.with(adjuster);
    }

    
{@inheritDoc}

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

    
{@inheritDoc}

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

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

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

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

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

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

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

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

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

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

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

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

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

 Compares this ThaiBuddhistDate with another ensuring that the date is the same. 
 Only objects of type ThaiBuddhistDate are compared, other types return false. To compare the dates of two TemporalAccessor instances, including dates in two different chronologies, use ChronoField.EPOCH_DAY as a comparator. 
Params:
  • obj –  the object to check, null returns false
Returns:true if this is equal to the other date
/**
     * Compares this date to another date, including the chronology.
     * <p>
     * Compares this {@code ThaiBuddhistDate} with another ensuring that the date is the same.
     * <p>
     * Only objects of type {@code ThaiBuddhistDate} 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 ThaiBuddhistDate) {
            ThaiBuddhistDate otherDate = (ThaiBuddhistDate) obj;
            return this.isoDate.equals(otherDate.isoDate);
        }
        return false;
    }

    
A hash code for this date.

Returns:a suitable hash code based only on the Chronology and the date
/**
     * 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.

Params:
  • s – the stream to read
Throws:
/**
     * 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
dedicated serialized form.

@serialData

 out.writeByte(10);                // identifies a ThaiBuddhistDate
 out.writeInt(get(YEAR));
 out.writeByte(get(MONTH_OF_YEAR));
 out.writeByte(get(DAY_OF_MONTH));

Returns:the instance of Ser, not null
/**
     * Writes the object using a
     * <a href="../../../serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
     * @serialData
     * <pre>
     *  out.writeByte(10);                // identifies a ThaiBuddhistDate
     *  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.THAIBUDDHIST_DATE_TYPE, this);
    }

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

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

}