001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.messaging.amf.io.convert.impl;
023
024import java.lang.reflect.Type;
025import java.util.Locale;
026import java.util.regex.Pattern;
027
028import org.granite.messaging.amf.io.convert.Converter;
029import org.granite.messaging.amf.io.convert.Converters;
030import org.granite.messaging.amf.io.convert.IllegalConverterArgumentException;
031import org.granite.messaging.amf.io.convert.Reverter;
032
033/**
034 * @author Franck WOLFF
035 */
036public class String2Locale extends Converter implements Reverter {
037
038        private static final Pattern SPLITTER = Pattern.compile(Pattern.quote("_"));
039        
040    public String2Locale(Converters converters) {
041        super(converters);
042    }
043
044    @Override
045        protected boolean internalCanConvert(Object value, Type targetType) {
046        return targetType.equals(Locale.class) && (value == null || value instanceof String);
047    }
048
049    @Override
050        protected Object internalConvert(Object value, Type targetType) {
051        if (value == null)
052            return null;
053        String[] tokens = SPLITTER.split((String)value, 3);
054        if (tokens.length == 1)
055                return new Locale(tokens[0]);
056        if (tokens.length == 2)
057                return new Locale(tokens[0], tokens[1]);
058        if (tokens.length == 3)
059                return new Locale(tokens[0], tokens[1], tokens[2]);
060        throw new IllegalConverterArgumentException(this, value, targetType, "Illegal Locale: " + value);
061    }
062
063        public boolean canRevert(Object value) {
064                return (value == null) || (value instanceof Locale);
065        }
066
067        public Object revert(Object value) {
068                if (value != null)
069                        value = value.toString();
070                return value;
071        }
072}