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	/*
	* Copyright (c) 2005, 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.
	*/

	package sun.util.calendar;

	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.List;
	import java.util.Properties;
	import java.util.StringTokenizer;
	import java.util.TimeZone;

	/**
	*
	* @author Masayoshi Okutsu
	* @since 1.6
	*/

	public class LocalGregorianCalendar extends BaseCalendar {
	private String name;
	private Era[] eras;

	public static class Date extends BaseCalendar.Date {

	protected Date() {
	super();
	}

	protected Date(TimeZone zone) {
	super(zone);
	}

	private int gregorianYear = FIELD_UNDEFINED;

	@Override
	public Date setEra(Era era) {
	if (getEra() != era) {
	super.setEra(era);
	gregorianYear = FIELD_UNDEFINED;
	}
	return this;
	}

	@Override
	public Date addYear(int localYear) {
	super.addYear(localYear);
	gregorianYear += localYear;
	return this;
	}

	@Override
	public Date setYear(int localYear) {
	if (getYear() != localYear) {
	super.setYear(localYear);
	gregorianYear = FIELD_UNDEFINED;
	}
	return this;
	}

	@Override
	public int getNormalizedYear() {
	return gregorianYear;
	}

	@Override
	public void setNormalizedYear(int normalizedYear) {
	this.gregorianYear = normalizedYear;
	}

	void setLocalEra(Era era) {
	super.setEra(era);
	}

	void setLocalYear(int year) {
	super.setYear(year);
	}

	@Override
	public String toString() {
	String time = super.toString();
	time = time.substring(time.indexOf('T'));
	StringBuffer sb = new StringBuffer();
	Era era = getEra();
	if (era != null) {
	String abbr = era.getAbbreviation();
	if (abbr != null) {
	sb.append(abbr);
	}
	}
	sb.append(getYear()).append('.');
	CalendarUtils.sprintf0d(sb, getMonth(), 2).append('.');
	CalendarUtils.sprintf0d(sb, getDayOfMonth(), 2);
	sb.append(time);
	return sb.toString();
	}
	}

	static LocalGregorianCalendar getLocalGregorianCalendar(String name) {
	Properties calendarProps;
	try {
	calendarProps = CalendarSystem.getCalendarProperties();
	} catch (IOException \| IllegalArgumentException e) {
	throw new InternalError(e);
	}
	// Parse calendar.*.eras
	String props = calendarProps.getProperty("calendar." + name + ".eras");
	if (props == null) {
	return null;
	}
	List<Era> eras = new ArrayList<>();
	StringTokenizer eraTokens = new StringTokenizer(props, ";");
	while (eraTokens.hasMoreTokens()) {
	String items = eraTokens.nextToken().trim();
	StringTokenizer itemTokens = new StringTokenizer(items, ",");
	String eraName = null;
	boolean localTime = true;
	long since = 0;
	String abbr = null;

	while (itemTokens.hasMoreTokens()) {
	String item = itemTokens.nextToken();
	int index = item.indexOf('=');
	// it must be in the key=value form.
	if (index == -1) {
	return null;
	}
	String key = item.substring(0, index);
	String value = item.substring(index + 1);
	if ("name".equals(key)) {
	eraName = value;
	} else if ("since".equals(key)) {
	if (value.endsWith("u")) {
	localTime = false;
	since = Long.parseLong(value.substring(0, value.length() - 1));
	} else {
	since = Long.parseLong(value);
	}
	} else if ("abbr".equals(key)) {
	abbr = value;
	} else {
	throw new RuntimeException("Unknown key word: " + key);
	}
	}
	Era era = new Era(eraName, abbr, since, localTime);
	eras.add(era);
	}
	Era[] eraArray = new Era[eras.size()];
	eras.toArray(eraArray);

	return new LocalGregorianCalendar(name, eraArray);
	}

	private LocalGregorianCalendar(String name, Era[] eras) {
	this.name = name;
	this.eras = eras;
	setEras(eras);
	}

	@Override
	public String getName() {
	return name;
	}

	@Override
	public Date getCalendarDate() {
	return getCalendarDate(System.currentTimeMillis(), newCalendarDate());
	}

	@Override
	public Date getCalendarDate(long millis) {
	return getCalendarDate(millis, newCalendarDate());
	}

	@Override
	public Date getCalendarDate(long millis, TimeZone zone) {
	return getCalendarDate(millis, newCalendarDate(zone));
	}

	@Override
	public Date getCalendarDate(long millis, CalendarDate date) {
	Date ldate = (Date) super.getCalendarDate(millis, date);
	return adjustYear(ldate, millis, ldate.getZoneOffset());
	}

	private Date adjustYear(Date ldate, long millis, int zoneOffset) {
	int i;
	for (i = eras.length - 1; i >= 0; --i) {
	Era era = eras[i];
	long since = era.getSince(null);
	if (era.isLocalTime()) {
	since -= zoneOffset;
	}
	if (millis >= since) {
	ldate.setLocalEra(era);
	int y = ldate.getNormalizedYear() - era.getSinceDate().getYear() + 1;
	ldate.setLocalYear(y);
	break;
	}
	}
	if (i < 0) {
	ldate.setLocalEra(null);
	ldate.setLocalYear(ldate.getNormalizedYear());
	}
	ldate.setNormalized(true);
	return ldate;
	}

	@Override
	public Date newCalendarDate() {
	return new Date();
	}

	@Override
	public Date newCalendarDate(TimeZone zone) {
	return new Date(zone);
	}

	@Override
	public boolean validate(CalendarDate date) {
	Date ldate = (Date) date;
	Era era = ldate.getEra();
	if (era != null) {
	if (!validateEra(era)) {
	return false;
	}
	ldate.setNormalizedYear(era.getSinceDate().getYear() + ldate.getYear() - 1);
	Date tmp = newCalendarDate(date.getZone());
	tmp.setEra(era).setDate(date.getYear(), date.getMonth(), date.getDayOfMonth());
	normalize(tmp);
	if (tmp.getEra() != era) {
	return false;
	}
	} else {
	if (date.getYear() >= eras[0].getSinceDate().getYear()) {
	return false;
	}
	ldate.setNormalizedYear(ldate.getYear());
	}
	return super.validate(ldate);
	}

	private boolean validateEra(Era era) {
	// Validate the era
	for (int i = 0; i < eras.length; i++) {
	if (era == eras[i]) {
	return true;
	}
	}
	return false;
	}

	@Override
	public boolean normalize(CalendarDate date) {
	if (date.isNormalized()) {
	return true;
	}

	normalizeYear(date);
	Date ldate = (Date) date;

	// Normalize it as a Gregorian date and get its millisecond value
	super.normalize(ldate);

	boolean hasMillis = false;
	long millis = 0;
	int year = ldate.getNormalizedYear();
	int i;
	Era era = null;
	for (i = eras.length - 1; i >= 0; --i) {
	era = eras[i];
	if (era.isLocalTime()) {
	CalendarDate sinceDate = era.getSinceDate();
	int sinceYear = sinceDate.getYear();
	if (year > sinceYear) {
	break;
	}
	if (year == sinceYear) {
	int month = ldate.getMonth();
	int sinceMonth = sinceDate.getMonth();
	if (month > sinceMonth) {
	break;
	}
	if (month == sinceMonth) {
	int day = ldate.getDayOfMonth();
	int sinceDay = sinceDate.getDayOfMonth();
	if (day > sinceDay) {
	break;
	}
	if (day == sinceDay) {
	long timeOfDay = ldate.getTimeOfDay();
	long sinceTimeOfDay = sinceDate.getTimeOfDay();
	if (timeOfDay >= sinceTimeOfDay) {
	break;
	}
	--i;
	break;
	}
	}
	}
	} else {
	if (!hasMillis) {
	millis = super.getTime(date);
	hasMillis = true;
	}

	long since = era.getSince(date.getZone());
	if (millis >= since) {
	break;
	}
	}
	}
	if (i >= 0) {
	ldate.setLocalEra(era);
	int y = ldate.getNormalizedYear() - era.getSinceDate().getYear() + 1;
	ldate.setLocalYear(y);
	} else {
	// Set Gregorian year with no era
	ldate.setEra(null);
	ldate.setLocalYear(year);
	ldate.setNormalizedYear(year);
	}
	ldate.setNormalized(true);
	return true;
	}

	@Override
	void normalizeMonth(CalendarDate date) {
	normalizeYear(date);
	super.normalizeMonth(date);
	}

	void normalizeYear(CalendarDate date) {
	Date ldate = (Date) date;
	// Set the supposed-to-be-correct Gregorian year first
	// e.g., Showa 90 becomes 2015 (1926 + 90 - 1).
	Era era = ldate.getEra();
	if (era == null \|\| !validateEra(era)) {
	ldate.setNormalizedYear(ldate.getYear());
	} else {
	ldate.setNormalizedYear(era.getSinceDate().getYear() + ldate.getYear() - 1);
	}
	}

	/**
	* Returns whether the specified Gregorian year is a leap year.
	* @see #isLeapYear(Era, int)
	*/
	@Override
	public boolean isLeapYear(int gregorianYear) {
	return CalendarUtils.isGregorianLeapYear(gregorianYear);
	}

	public boolean isLeapYear(Era era, int year) {
	if (era == null) {
	return isLeapYear(year);
	}
	int gyear = era.getSinceDate().getYear() + year - 1;
	return isLeapYear(gyear);
	}

	@Override
	public void getCalendarDateFromFixedDate(CalendarDate date, long fixedDate) {
	Date ldate = (Date) date;
	super.getCalendarDateFromFixedDate(ldate, fixedDate);
	adjustYear(ldate, (fixedDate - EPOCH_OFFSET) * DAY_IN_MILLIS, 0);
	}
	}

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