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.ParameterizedType;
024    import java.lang.reflect.Type;
025    import java.lang.reflect.WildcardType;
026    
027    import org.granite.messaging.amf.io.convert.Converter;
028    import org.granite.messaging.amf.io.convert.Converters;
029    import org.granite.util.ClassUtil;
030    
031    /**
032     * @author Franck WOLFF
033     */
034    public class Compatibility extends Converter {
035    
036        public Compatibility(Converters converters) {
037            super(converters);
038        }
039    
040        @Override
041            protected boolean internalCanConvert(Object value, Type targetType) {
042            if (value == null)
043                return !ClassUtil.isPrimitive(targetType);
044    
045            if (targetType instanceof Class<?>)
046                return ((Class<?>)targetType).isInstance(value);
047    
048            if (targetType instanceof ParameterizedType) {
049                ParameterizedType pType = (ParameterizedType)targetType;
050                if (((Class<?>)pType.getRawType()).isInstance(value)) {
051                    Type[] pTypeArgs = pType.getActualTypeArguments();
052                    if (pTypeArgs == null || pTypeArgs.length == 0)
053                        return true;
054                    for (Type pTypeArg : pTypeArgs) {
055                        if (!(pTypeArg instanceof WildcardType || pTypeArg.equals(Object.class)))
056                            return false;
057                    }
058                    return true;
059                }
060            }
061    
062            return false;
063        }
064    
065        @Override
066            protected Object internalConvert(Object value, Type targetType) {
067            return value;
068        }
069    }