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.TypeVariable;
026    import java.lang.reflect.WildcardType;
027    
028    import org.granite.messaging.amf.io.convert.Converter;
029    import org.granite.messaging.amf.io.convert.Converters;
030    import org.granite.util.TypeUtil;
031    
032    /**
033     * @author Franck WOLFF
034     */
035    public class Compatibility extends Converter {
036    
037        public Compatibility(Converters converters) {
038            super(converters);
039        }
040    
041        @Override
042            protected boolean internalCanConvert(Object value, Type targetType) {
043            if (value == null)
044                return !TypeUtil.isPrimitive(targetType);
045    
046            if (targetType instanceof Class<?>)
047                return ((Class<?>)targetType).isInstance(value);
048    
049            if (targetType instanceof ParameterizedType) {
050                ParameterizedType pType = (ParameterizedType)targetType;
051                if (((Class<?>)pType.getRawType()).isInstance(value)) {
052                    Type[] pTypeArgs = pType.getActualTypeArguments();
053                    if (pTypeArgs == null || pTypeArgs.length == 0)
054                        return true;
055                    for (Type pTypeArg : pTypeArgs) {
056                        if (!(pTypeArg instanceof WildcardType || pTypeArg instanceof TypeVariable || pTypeArg.equals(Object.class))) 
057                            return false;
058                    }
059                    return true;
060                }
061            }
062    
063            return false;
064        }
065    
066        @Override
067            protected Object internalConvert(Object value, Type targetType) {
068            return value;
069        }
070    }