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    
021    package org.granite.messaging.amf.io.convert.impl;
022    
023    import java.lang.reflect.Type;
024    import java.util.Locale;
025    import java.util.regex.Pattern;
026    
027    import org.granite.messaging.amf.io.convert.Converter;
028    import org.granite.messaging.amf.io.convert.Converters;
029    import org.granite.messaging.amf.io.convert.IllegalConverterArgumentException;
030    import org.granite.messaging.amf.io.convert.Reverter;
031    
032    /**
033     * @author Franck WOLFF
034     */
035    public 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    }