Back to index...

	/*
	* Copyright (c) 2012, 2015, 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 java.io.InvalidObjectException;
	import static java.time.temporal.ChronoField.PROLEPTIC_MONTH;
	import static java.time.temporal.ChronoField.YEAR;

	import java.io.ObjectInputStream;
	import java.io.Serializable;
	import java.time.Clock;
	import java.time.DateTimeException;
	import java.time.Instant;
	import java.time.LocalDate;
	import java.time.ZoneId;
	import java.time.format.ResolverStyle;
	import java.time.temporal.ChronoField;
	import java.time.temporal.TemporalAccessor;
	import java.time.temporal.TemporalField;
	import java.time.temporal.ValueRange;
	import java.util.Arrays;
	import java.util.HashMap;
	import java.util.List;
	import java.util.Locale;
	import java.util.Map;

	/**
	* The Thai Buddhist calendar system.
	* <p>
	* This chronology defines the rules of the Thai Buddhist calendar system.
	* 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>
	* The fields are defined as follows:
	* <ul>
	* <li>era - There are two eras, the current 'Buddhist' (ERA_BE) and the previous era (ERA_BEFORE_BE).
	* <li>year-of-era - The year-of-era for the current era increases uniformly from the epoch at year one.
	* For the previous era the year increases from one as time goes backwards.
	* The value for the current era is equal to the ISO proleptic-year plus 543.
	* <li>proleptic-year - The proleptic year is the same as the year-of-era for the
	* current era. For the previous era, years have zero, then negative values.
	* The value is equal to the ISO proleptic-year plus 543.
	* <li>month-of-year - The ThaiBuddhist month-of-year exactly matches ISO.
	* <li>day-of-month - The ThaiBuddhist day-of-month exactly matches ISO.
	* <li>day-of-year - The ThaiBuddhist day-of-year exactly matches ISO.
	* <li>leap-year - The ThaiBuddhist leap-year pattern exactly matches ISO, such that the two calendars
	* are never out of step.
	* </ul>
	*
	* @implSpec
	* This class is immutable and thread-safe.
	*
	* @since 1.8
	*/
	public final class ThaiBuddhistChronology extends AbstractChronology implements Serializable {

	/**
	* Singleton instance of the Buddhist chronology.
	*/
	public static final ThaiBuddhistChronology INSTANCE = new ThaiBuddhistChronology();

	/**
	* Serialization version.
	*/
	private static final long serialVersionUID = 2775954514031616474L;
	/**
	* Containing the offset to add to the ISO year.
	*/
	static final int YEARS_DIFFERENCE = 543;
	/**
	* Narrow names for eras.
	*/
	private static final HashMap<String, String[]> ERA_NARROW_NAMES = new HashMap<>();
	/**
	* Short names for eras.
	*/
	private static final HashMap<String, String[]> ERA_SHORT_NAMES = new HashMap<>();
	/**
	* Full names for eras.
	*/
	private static final HashMap<String, String[]> ERA_FULL_NAMES = new HashMap<>();
	/**
	* Fallback language for the era names.
	*/
	private static final String FALLBACK_LANGUAGE = "en";
	/**
	* Language that has the era names.
	*/
	private static final String TARGET_LANGUAGE = "th";
	/**
	* Name data.
	*/
	static {
	ERA_NARROW_NAMES.put(FALLBACK_LANGUAGE, new String[]{"BB", "BE"});
	ERA_NARROW_NAMES.put(TARGET_LANGUAGE, new String[]{"BB", "BE"});
	ERA_SHORT_NAMES.put(FALLBACK_LANGUAGE, new String[]{"B.B.", "B.E."});
	ERA_SHORT_NAMES.put(TARGET_LANGUAGE,
	new String[]{"\u0e1e.\u0e28.",
	"\u0e1b\u0e35\u0e01\u0e48\u0e2d\u0e19\u0e04\u0e23\u0e34\u0e2a\u0e15\u0e4c\u0e01\u0e32\u0e25\u0e17\u0e35\u0e48"});
	ERA_FULL_NAMES.put(FALLBACK_LANGUAGE, new String[]{"Before Buddhist", "Budhhist Era"});
	ERA_FULL_NAMES.put(TARGET_LANGUAGE,
	new String[]{"\u0e1e\u0e38\u0e17\u0e18\u0e28\u0e31\u0e01\u0e23\u0e32\u0e0a",
	"\u0e1b\u0e35\u0e01\u0e48\u0e2d\u0e19\u0e04\u0e23\u0e34\u0e2a\u0e15\u0e4c\u0e01\u0e32\u0e25\u0e17\u0e35\u0e48"});
	}

	/**
	* Restricted constructor.
	*/
	private ThaiBuddhistChronology() {
	}

	//-----------------------------------------------------------------------
	/**
	* Gets the ID of the chronology - 'ThaiBuddhist'.
	* <p>
	* The ID uniquely identifies the {@code Chronology}.
	* It can be used to lookup the {@code Chronology} using {@link Chronology#of(String)}.
	*
	* @return the chronology ID - 'ThaiBuddhist'
	* @see #getCalendarType()
	*/
	@Override
	public String getId() {
	return "ThaiBuddhist";
	}

	/**
	* Gets the calendar type of the underlying calendar system - 'buddhist'.
	* <p>
	* The calendar type is an identifier defined by the
	* <em>Unicode Locale Data Markup Language (LDML)</em> specification.
	* It can be used to lookup the {@code Chronology} using {@link Chronology#of(String)}.
	* It can also be used as part of a locale, accessible via
	* {@link Locale#getUnicodeLocaleType(String)} with the key 'ca'.
	*
	* @return the calendar system type - 'buddhist'
	* @see #getId()
	*/
	@Override
	public String getCalendarType() {
	return "buddhist";
	}

	//-----------------------------------------------------------------------
	/**
	* Obtains a local date in Thai Buddhist calendar system from the
	* era, year-of-era, month-of-year and day-of-month fields.
	*
	* @param era the Thai Buddhist era, not null
	* @param yearOfEra the year-of-era
	* @param month the month-of-year
	* @param dayOfMonth the day-of-month
	* @return the Thai Buddhist local date, not null
	* @throws DateTimeException if unable to create the date
	* @throws ClassCastException if the {@code era} is not a {@code ThaiBuddhistEra}
	*/
	@Override
	public ThaiBuddhistDate date(Era era, int yearOfEra, int month, int dayOfMonth) {
	return date(prolepticYear(era, yearOfEra), month, dayOfMonth);
	}

	/**
	* Obtains a local date in Thai Buddhist calendar system from the
	* proleptic-year, month-of-year and day-of-month fields.
	*
	* @param prolepticYear the proleptic-year
	* @param month the month-of-year
	* @param dayOfMonth the day-of-month
	* @return the Thai Buddhist local date, not null
	* @throws DateTimeException if unable to create the date
	*/
	@Override
	public ThaiBuddhistDate date(int prolepticYear, int month, int dayOfMonth) {
	return new ThaiBuddhistDate(LocalDate.of(prolepticYear - YEARS_DIFFERENCE, month, dayOfMonth));
	}

	/**
	* Obtains a local date in Thai Buddhist calendar system from the
	* era, year-of-era and day-of-year fields.
	*
	* @param era the Thai Buddhist era, not null
	* @param yearOfEra the year-of-era
	* @param dayOfYear the day-of-year
	* @return the Thai Buddhist local date, not null
	* @throws DateTimeException if unable to create the date
	* @throws ClassCastException if the {@code era} is not a {@code ThaiBuddhistEra}
	*/
	@Override
	public ThaiBuddhistDate dateYearDay(Era era, int yearOfEra, int dayOfYear) {
	return dateYearDay(prolepticYear(era, yearOfEra), dayOfYear);
	}

	/**
	* Obtains a local date in Thai Buddhist calendar system from the
	* proleptic-year and day-of-year fields.
	*
	* @param prolepticYear the proleptic-year
	* @param dayOfYear the day-of-year
	* @return the Thai Buddhist local date, not null
	* @throws DateTimeException if unable to create the date
	*/
	@Override
	public ThaiBuddhistDate dateYearDay(int prolepticYear, int dayOfYear) {
	return new ThaiBuddhistDate(LocalDate.ofYearDay(prolepticYear - YEARS_DIFFERENCE, dayOfYear));
	}

	/**
	* Obtains a local date in the Thai Buddhist calendar system from the epoch-day.
	*
	* @param epochDay the epoch day
	* @return the Thai Buddhist local date, not null
	* @throws DateTimeException if unable to create the date
	*/
	@Override // override with covariant return type
	public ThaiBuddhistDate dateEpochDay(long epochDay) {
	return new ThaiBuddhistDate(LocalDate.ofEpochDay(epochDay));
	}

	@Override
	public ThaiBuddhistDate dateNow() {
	return dateNow(Clock.systemDefaultZone());
	}

	@Override
	public ThaiBuddhistDate dateNow(ZoneId zone) {
	return dateNow(Clock.system(zone));
	}

	@Override
	public ThaiBuddhistDate dateNow(Clock clock) {
	return date(LocalDate.now(clock));
	}

	@Override
	public ThaiBuddhistDate date(TemporalAccessor temporal) {
	if (temporal instanceof ThaiBuddhistDate) {
	return (ThaiBuddhistDate) temporal;
	}
	return new ThaiBuddhistDate(LocalDate.from(temporal));
	}

	@Override
	@SuppressWarnings("unchecked")
	public ChronoLocalDateTime<ThaiBuddhistDate> localDateTime(TemporalAccessor temporal) {
	return (ChronoLocalDateTime<ThaiBuddhistDate>)super.localDateTime(temporal);
	}

	@Override
	@SuppressWarnings("unchecked")
	public ChronoZonedDateTime<ThaiBuddhistDate> zonedDateTime(TemporalAccessor temporal) {
	return (ChronoZonedDateTime<ThaiBuddhistDate>)super.zonedDateTime(temporal);
	}

	@Override
	@SuppressWarnings("unchecked")
	public ChronoZonedDateTime<ThaiBuddhistDate> zonedDateTime(Instant instant, ZoneId zone) {
	return (ChronoZonedDateTime<ThaiBuddhistDate>)super.zonedDateTime(instant, zone);
	}

	//-----------------------------------------------------------------------
	/**
	* Checks if the specified year is a leap year.
	* <p>
	* Thai Buddhist leap years occur exactly in line with ISO leap years.
	* This method does not validate the year passed in, and only has a
	* well-defined result for years in the supported range.
	*
	* @param prolepticYear the proleptic-year to check, not validated for range
	* @return true if the year is a leap year
	*/
	@Override
	public boolean isLeapYear(long prolepticYear) {
	return IsoChronology.INSTANCE.isLeapYear(prolepticYear - YEARS_DIFFERENCE);
	}

	@Override
	public int prolepticYear(Era era, int yearOfEra) {
	if (era instanceof ThaiBuddhistEra == false) {
	throw new ClassCastException("Era must be BuddhistEra");
	}
	return (era == ThaiBuddhistEra.BE ? yearOfEra : 1 - yearOfEra);
	}

	@Override
	public ThaiBuddhistEra eraOf(int eraValue) {
	return ThaiBuddhistEra.of(eraValue);
	}

	@Override
	public List<Era> eras() {
	return Arrays.<Era>asList(ThaiBuddhistEra.values());
	}

	//-----------------------------------------------------------------------
	@Override
	public ValueRange range(ChronoField field) {
	switch (field) {
	case PROLEPTIC_MONTH: {
	ValueRange range = PROLEPTIC_MONTH.range();
	return ValueRange.of(range.getMinimum() + YEARS_DIFFERENCE * 12L, range.getMaximum() + YEARS_DIFFERENCE * 12L);
	}
	case YEAR_OF_ERA: {
	ValueRange range = YEAR.range();
	return ValueRange.of(1, -(range.getMinimum() + YEARS_DIFFERENCE) + 1, range.getMaximum() + YEARS_DIFFERENCE);
	}
	case YEAR: {
	ValueRange range = YEAR.range();
	return ValueRange.of(range.getMinimum() + YEARS_DIFFERENCE, range.getMaximum() + YEARS_DIFFERENCE);
	}
	}
	return field.range();
	}

	//-----------------------------------------------------------------------
	@Override // override for return type
	public ThaiBuddhistDate resolveDate(Map<TemporalField, Long> fieldValues, ResolverStyle resolverStyle) {
	return (ThaiBuddhistDate) super.resolveDate(fieldValues, resolverStyle);
	}

	//-----------------------------------------------------------------------
	/**
	* Writes the Chronology using a
	* <a href="../../../serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
	* @serialData
	* <pre>
	* out.writeByte(1); // identifies a Chronology
	* out.writeUTF(getId());
	* </pre>
	*
	* @return the instance of {@code Ser}, not null
	*/
	@Override
	Object writeReplace() {
	return super.writeReplace();
	}

	/**
	* 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");
	}
	}

Back to index...