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264 lines
8 KiB
Java
264 lines
8 KiB
Java
/*
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* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.util;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.util.GregorianCalendar;
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import java.util.Locale;
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import java.util.Map;
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import java.util.TimeZone;
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import sun.util.locale.provider.CalendarDataUtility;
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public class BuddhistCalendar extends GregorianCalendar {
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//////////////////
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// Class Variables
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//////////////////
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@java.io.Serial
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private static final long serialVersionUID = -8527488697350388578L;
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private static final int BUDDHIST_YEAR_OFFSET = 543;
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///////////////
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// Constructors
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///////////////
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/**
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* Constructs a default BuddhistCalendar using the current time
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* in the default time zone with the default locale.
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*/
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public BuddhistCalendar() {
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super();
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}
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/**
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* Constructs a BuddhistCalendar based on the current time
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* in the given time zone with the default locale.
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* @param zone the given time zone.
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*/
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public BuddhistCalendar(TimeZone zone) {
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super(zone);
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}
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/**
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* Constructs a BuddhistCalendar based on the current time
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* in the default time zone with the given locale.
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* @param aLocale the given locale.
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*/
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public BuddhistCalendar(Locale aLocale) {
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super(aLocale);
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}
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/**
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* Constructs a BuddhistCalendar based on the current time
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* in the given time zone with the given locale.
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* @param zone the given time zone.
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* @param aLocale the given locale.
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*/
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public BuddhistCalendar(TimeZone zone, Locale aLocale) {
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super(zone, aLocale);
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}
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/////////////////
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// Public methods
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/////////////////
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/**
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* Returns {@code "buddhist"} as the calendar type of this Calendar.
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*/
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@Override
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public String getCalendarType() {
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return "buddhist";
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}
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/**
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* Compares this BuddhistCalendar to an object reference.
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* @param obj the object reference with which to compare
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* @return true if this object is equal to <code>obj</code>; false otherwise
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*/
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@Override
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public boolean equals(Object obj) {
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return obj instanceof BuddhistCalendar
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&& super.equals(obj);
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}
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/**
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* Override hashCode.
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* Generates the hash code for the BuddhistCalendar object
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*/
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@Override
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public int hashCode() {
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return super.hashCode() ^ BUDDHIST_YEAR_OFFSET;
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}
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/**
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* Gets the value for a given time field.
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* @param field the given time field.
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* @return the value for the given time field.
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*/
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@Override
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public int get(int field)
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{
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if (field == YEAR) {
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return super.get(field) + yearOffset;
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}
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return super.get(field);
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}
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/**
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* Sets the time field with the given value.
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* @param field the given time field.
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* @param value the value to be set for the given time field.
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*/
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@Override
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public void set(int field, int value)
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{
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if (field == YEAR) {
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super.set(field, value - yearOffset);
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} else {
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super.set(field, value);
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}
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}
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/**
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* Adds the specified (signed) amount of time to the given time field.
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* @param field the time field.
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* @param amount the amount of date or time to be added to the field.
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*/
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@Override
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public void add(int field, int amount)
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{
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int savedYearOffset = yearOffset;
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// To let the superclass calculate date-time values correctly,
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// temporarily make this GregorianCalendar.
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yearOffset = 0;
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try {
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super.add(field, amount);
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} finally {
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yearOffset = savedYearOffset;
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}
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}
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/**
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* Add to field a signed amount without changing larger fields.
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* A negative roll amount means to subtract from field without changing
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* larger fields.
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* @param field the time field.
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* @param amount the signed amount to add to <code>field</code>.
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*/
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@Override
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public void roll(int field, int amount)
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{
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int savedYearOffset = yearOffset;
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// To let the superclass calculate date-time values correctly,
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// temporarily make this GregorianCalendar.
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yearOffset = 0;
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try {
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super.roll(field, amount);
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} finally {
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yearOffset = savedYearOffset;
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}
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}
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@Override
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public String getDisplayName(int field, int style, Locale locale) {
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if (field != ERA) {
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return super.getDisplayName(field, style, locale);
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}
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return CalendarDataUtility.retrieveFieldValueName("buddhist", field, get(field), style, locale);
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}
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@Override
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public Map<String,Integer> getDisplayNames(int field, int style, Locale locale) {
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if (field != ERA) {
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return super.getDisplayNames(field, style, locale);
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}
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return CalendarDataUtility.retrieveFieldValueNames("buddhist", field, style, locale);
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}
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/**
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* Returns the maximum value that this field could have, given the
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* current date. For example, with the date "Feb 3, 2540" and the
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* <code>DAY_OF_MONTH</code> field, the actual maximum is 28; for
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* "Feb 3, 2539" it is 29.
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*
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* @param field the field to determine the maximum of
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* @return the maximum of the given field for the current date of this Calendar
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*/
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@Override
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public int getActualMaximum(int field) {
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int savedYearOffset = yearOffset;
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// To let the superclass calculate date-time values correctly,
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// temporarily make this GregorianCalendar.
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yearOffset = 0;
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try {
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return super.getActualMaximum(field);
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} finally {
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yearOffset = savedYearOffset;
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}
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}
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@Override
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@SuppressWarnings("empty-statement")
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public String toString() {
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// The super class produces a String with the Gregorian year
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// value (or '?')
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String s = super.toString();
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// If the YEAR field is UNSET, then return the Gregorian string.
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if (!isSet(YEAR)) {
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return s;
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}
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final String yearField = "YEAR=";
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int p = s.indexOf(yearField);
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// If the string doesn't include the year value for some
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// reason, then return the Gregorian string.
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if (p == -1) {
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return s;
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}
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p += yearField.length();
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StringBuilder sb = new StringBuilder(s.length() + 10);
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sb.append(s, 0, p);
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// Skip the year number
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while (Character.isDigit(s.charAt(p++)))
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;
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int year = internalGet(YEAR) + BUDDHIST_YEAR_OFFSET;
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sb.append(year).append(s, p - 1, s.length());
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return sb.toString();
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}
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private transient int yearOffset = BUDDHIST_YEAR_OFFSET;
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@java.io.Serial
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private void readObject(ObjectInputStream stream)
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throws IOException, ClassNotFoundException {
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stream.defaultReadObject();
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yearOffset = BUDDHIST_YEAR_OFFSET;
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}
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}
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