001/*
002  GRANITE DATA SERVICES
003  Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005  This file is part of Granite Data Services.
006
007  Granite Data Services is free software; you can redistribute it and/or modify
008  it under the terms of the GNU Library General Public License as published by
009  the Free Software Foundation; either version 2 of the License, or (at your
010  option) any later version.
011
012  Granite Data Services is distributed in the hope that it will be useful, but
013  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015  for more details.
016
017  You should have received a copy of the GNU Library General Public License
018  along with this library; if not, see <http://www.gnu.org/licenses/>.
019*/
020
021package org.granite.messaging.amf.io.convert.impl;
022
023import java.lang.reflect.Type;
024import java.util.Locale;
025import java.util.regex.Pattern;
026
027import org.granite.messaging.amf.io.convert.Converter;
028import org.granite.messaging.amf.io.convert.Converters;
029import org.granite.messaging.amf.io.convert.IllegalConverterArgumentException;
030import org.granite.messaging.amf.io.convert.Reverter;
031
032/**
033 * @author Franck WOLFF
034 */
035public class String2Locale extends Converter implements Reverter {
036
037        private static final Pattern SPLITTER = Pattern.compile(Pattern.quote("_"));
038        
039    public String2Locale(Converters converters) {
040        super(converters);
041    }
042
043    @Override
044        protected boolean internalCanConvert(Object value, Type targetType) {
045        return targetType.equals(Locale.class) && (value == null || value instanceof String);
046    }
047
048    @Override
049        protected Object internalConvert(Object value, Type targetType) {
050        if (value == null)
051            return null;
052        String[] tokens = SPLITTER.split((String)value, 3);
053        if (tokens.length == 1)
054                return new Locale(tokens[0]);
055        if (tokens.length == 2)
056                return new Locale(tokens[0], tokens[1]);
057        if (tokens.length == 3)
058                return new Locale(tokens[0], tokens[1], tokens[2]);
059        throw new IllegalConverterArgumentException(this, value, targetType, "Illegal Locale: " + value);
060    }
061
062        public boolean canRevert(Object value) {
063                return (value == null) || (value instanceof Locale);
064        }
065
066        public Object revert(Object value) {
067                if (value != null)
068                        value = value.toString();
069                return value;
070        }
071}