/*
 * This software is distributed under following license based on modified BSD
 * style license.
 * ----------------------------------------------------------------------
 * 
 * Copyright 2009 The Nimbus2 Project. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer. 
 * 2. 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.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE NIMBUS PROJECT ``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 NIMBUS PROJECT 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.
 * 
 * The views and conclusions contained in the software and documentation are
 * those of the authors and should not be interpreted as representing official
 * policies, either expressed or implied, of the Nimbus2 Project.
 */
package jp.ossc.nimbus.beans;

import java.util.*;
import java.beans.*;

/**
 * {@link Locale}型のPropertyEditorクラス。<p>
 * ロケール文字列をjava.util.Locale型のオブジェクトに変換する。<br>
 * "${"と"}"に囲まれた文字列は、同名のシステムプロパティと置換される。<br>
 * <p>
 * 例：<br>
 * &nbsp;&nbsp;ja_JP<br>
 * <br>
 * のような文字列が<br>
 * <br>
 * &nbsp;&nbsp;new Locale("ja", "JP")<br>
 * <br>
 * のように変換される。<br>
 *
 * @author M.Takata
 */
public class LocaleEditor extends PropertyEditorSupport
 implements java.io.Serializable{
    
    private static final long serialVersionUID = 3381846750269724819L;
    
    private static final String DELIMETER = "_";
    
    /**
     * 指定された文字列を解析してプロパティ値を設定する。<p>
     *
     * @param text 解析される文字列
     */
    @Override
    public void setAsText(String text){
        final String tmp = jp.ossc.nimbus.core.Utility.replaceSystemProperty(text, false);
        final int length = tmp.length();
        Locale locale = null;
        if(length == 0){
            locale = Locale.getDefault();
        }else{
            final StringTokenizer tokens = new StringTokenizer(tmp, DELIMETER);
            final int count = tokens.countTokens();
            switch(count){
            case 1:
                locale = new Locale(tokens.nextToken());
                break;
            case 2:
                locale = new Locale(
                    tokens.nextToken(),
                    tokens.nextToken()
                );
                break;
            case 3:
                locale = new Locale(
                    tokens.nextToken(),
                    tokens.nextToken(),
                    tokens.nextToken()
                );
                break;
            default:
                throw new IllegalArgumentException(text);
            }
        }
        setValue(locale);
    }
    
    /**
     * プロパティ文字列を取得する。<p>
     *
     * @return プロパティ文字列
     */
    @Override
    public String getAsText(){
        return ((Locale)getValue()).toString();
    }
}
