/*
* Copyright 2000-2005 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package sun.util;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.ResourceBundle;
import java.util.TimeZone;
import sun.util.resources.LocaleData;
public class BuddhistCalendar extends GregorianCalendar {
//////////////////
// Class Variables
//////////////////
private static final long serialVersionUID = -8527488697350388578L;
private static final int buddhistOffset = 543;
///////////////
// Constructors
///////////////
/**
* Constructs a default BuddhistCalendar using the current time
* in the default time zone with the default locale.
*/
public BuddhistCalendar() {
super();
}
/**
* Constructs a BuddhistCalendar based on the current time
* in the given time zone with the default locale.
* @param zone the given time zone.
*/
public BuddhistCalendar(TimeZone zone) {
super(zone);
}
/**
* Constructs a BuddhistCalendar based on the current time
* in the default time zone with the given locale.
* @param aLocale the given locale.
*/
public BuddhistCalendar(Locale aLocale) {
super(aLocale);
}
/**
* Constructs a BuddhistCalendar based on the current time
* in the given time zone with the given locale.
* @param zone the given time zone.
* @param aLocale the given locale.
*/
public BuddhistCalendar(TimeZone zone, Locale aLocale) {
super(zone, aLocale);
}
/////////////////
// Public methods
/////////////////
/**
* Compares this BuddhistCalendar to an object reference.
* @param obj the object reference with which to compare
* @return true if this object is equal to <code>obj</code>; false otherwise
*/
public boolean equals(Object obj) {
return obj instanceof BuddhistCalendar
&& super.equals(obj);
}
/**
* Override hashCode.
* Generates the hash code for the BuddhistCalendar object
*/
public int hashCode() {
return super.hashCode() ^ buddhistOffset;
}
/**
* Gets the value for a given time field.
* @param field the given time field.
* @return the value for the given time field.
*/
public int get(int field)
{
if (field == YEAR) {
return super.get(field) + yearOffset;
}
return super.get(field);
}
/**
* Sets the time field with the given value.
* @param field the given time field.
* @param value the value to be set for the given time field.
*/
public void set(int field, int value)
{
if (field == YEAR) {
super.set(field, value - yearOffset);
} else {
super.set(field, value);
}
}
/**
* Adds the specified (signed) amount of time to the given time field.
* @param field the time field.
* @param amount the amount of date or time to be added to the field.
*/
public void add(int field, int amount)
{
int savedYearOffset = yearOffset;
yearOffset = 0;
try {
super.add(field, amount);
} finally {
yearOffset = savedYearOffset;
}
}
/**
* Add to field a signed amount without changing larger fields.
* A negative roll amount means to subtract from field without changing
* larger fields.
* @param field the time field.
* @param amount the signed amount to add to <code>field</code>.
*/
public void roll(int field, int amount)
{
int savedYearOffset = yearOffset;
yearOffset = 0;
try {
super.roll(field, amount);
} finally {
yearOffset = savedYearOffset;
}
}
public String getDisplayName(int field, int style, Locale locale) {
if (field != ERA) {
return super.getDisplayName(field, style, locale);
}
// Handle Thai BuddhistCalendar specific era names
if (field < 0 || field >= fields.length ||
style < SHORT || style > LONG) {
throw new IllegalArgumentException();
}
if (locale == null) {
throw new NullPointerException();
}
ResourceBundle rb = LocaleData.getDateFormatData(locale);
String[] eras = rb.getStringArray(getKey(style));
return eras[get(field)];
}
public Map<String,Integer> getDisplayNames(int field, int style, Locale locale) {
if (field != ERA) {
return super.getDisplayNames(field, style, locale);
}
// Handle Thai BuddhistCalendar specific era names
if (field < 0 || field >= fields.length ||
style < ALL_STYLES || style > LONG) {
throw new IllegalArgumentException();
}
if (locale == null) {
throw new NullPointerException();
}
// ALL_STYLES
if (style == ALL_STYLES) {
Map<String,Integer> shortNames = getDisplayNamesImpl(field, SHORT, locale);
Map<String,Integer> longNames = getDisplayNamesImpl(field, LONG, locale);
if (shortNames == null) {
return longNames;
}
if (longNames != null) {
shortNames.putAll(longNames);
}
return shortNames;
}
// SHORT or LONG
return getDisplayNamesImpl(field, style, locale);
}
private Map<String,Integer> getDisplayNamesImpl(int field, int style, Locale locale) {
ResourceBundle rb = LocaleData.getDateFormatData(locale);
String[] eras = rb.getStringArray(getKey(style));
Map<String,Integer> map = new HashMap<String,Integer>(4);
for (int i = 0; i < eras.length; i++) {
map.put(eras[i], i);
}
return map;
}
private String getKey(int style) {
StringBuilder key = new StringBuilder();
key.append(BuddhistCalendar.class.getName());
if (style == SHORT) {
key.append(".short");
}
key.append(".Eras");
return key.toString();
}
/**
* Returns the maximum value that this field could have, given the
* current date. For example, with the date "Feb 3, 2540" and the
* <code>DAY_OF_MONTH</code> field, the actual maximum is 28; for
* "Feb 3, 2539" it is 29.
*
* @param field the field to determine the maximum of
* @return the maximum of the given field for the current date of this Calendar
*/
public int getActualMaximum(int field) {
int savedYearOffset = yearOffset;
yearOffset = 0;
try {
return super.getActualMaximum(field);
} finally {
yearOffset = savedYearOffset;
}
}
public String toString() {
// The super class produces a String with the Gregorian year
// value (or '?')
String s = super.toString();
// If the YEAR field is UNSET, then return the Gregorian string.
if (!isSet(YEAR)) {
return s;
}
final String yearField = "YEAR=";
int p = s.indexOf(yearField);
// If the string doesn't include the year value for some
// reason, then return the Gregorian string.
if (p == -1) {
return s;
}
p += yearField.length();
StringBuilder sb = new StringBuilder(s.substring(0, p));
// Skip the year number
while (Character.isDigit(s.charAt(p++)))
;
int year = internalGet(YEAR) + buddhistOffset;
sb.append(year).append(s.substring(p - 1));
return sb.toString();
}
private transient int yearOffset = buddhistOffset;
}