ojluni/src/main/java/sun/util/BuddhistCalendar.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2000, 2010, 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;

 import java.io.IOException;
 import java.io.ObjectInputStream;
 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 BUDDHIST_YEAR_OFFSET = 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() ^ BUDDHIST_YEAR_OFFSET;
     }

     /**
      * 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;
         // To let the superclass calculate date-time values correctly,
         // temporarily make this GregorianCalendar.
         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;
         // To let the superclass calculate date-time values correctly,
         // temporarily make this GregorianCalendar.
         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;
         // To let the superclass calculate date-time values correctly,
         // temporarily make this GregorianCalendar.
         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) + BUDDHIST_YEAR_OFFSET;
         sb.append(year).append(s.substring(p - 1));
         return sb.toString();
     }

     private transient int yearOffset = BUDDHIST_YEAR_OFFSET;

     private void readObject(ObjectInputStream stream)
         throws IOException, ClassNotFoundException {
         stream.defaultReadObject();
         yearOffset = BUDDHIST_YEAR_OFFSET;
     }
 }
	/*
	* Copyright (c) 2000, 2010, 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;

	import java.io.IOException;
	import java.io.ObjectInputStream;
	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 BUDDHIST_YEAR_OFFSET = 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() ^ BUDDHIST_YEAR_OFFSET;
	}

	/**
	* 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;
	// To let the superclass calculate date-time values correctly,
	// temporarily make this GregorianCalendar.
	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;
	// To let the superclass calculate date-time values correctly,
	// temporarily make this GregorianCalendar.
	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;
	// To let the superclass calculate date-time values correctly,
	// temporarily make this GregorianCalendar.
	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) + BUDDHIST_YEAR_OFFSET;
	sb.append(year).append(s.substring(p - 1));
	return sb.toString();
	}

	private transient int yearOffset = BUDDHIST_YEAR_OFFSET;

	private void readObject(ObjectInputStream stream)
	throws IOException, ClassNotFoundException {
	stream.defaultReadObject();
	yearOffset = BUDDHIST_YEAR_OFFSET;
	}
	}