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     */
022    package org.granite.messaging.amf.io.convert.impl;
023    
024    import java.lang.reflect.ParameterizedType;
025    import java.lang.reflect.Type;
026    import java.lang.reflect.TypeVariable;
027    import java.lang.reflect.WildcardType;
028    
029    import org.granite.messaging.amf.io.convert.Converter;
030    import org.granite.messaging.amf.io.convert.Converters;
031    import org.granite.util.TypeUtil;
032    
033    /**
034     * @author Franck WOLFF
035     */
036    public class Compatibility extends Converter {
037    
038        public Compatibility(Converters converters) {
039            super(converters);
040        }
041    
042        @Override
043            protected boolean internalCanConvert(Object value, Type targetType) {
044            if (value == null)
045                return !TypeUtil.isPrimitive(targetType);
046    
047            if (targetType instanceof Class<?>)
048                return ((Class<?>)targetType).isInstance(value);
049    
050            if (targetType instanceof ParameterizedType) {
051                ParameterizedType pType = (ParameterizedType)targetType;
052                if (((Class<?>)pType.getRawType()).isInstance(value)) {
053                    Type[] pTypeArgs = pType.getActualTypeArguments();
054                    if (pTypeArgs == null || pTypeArgs.length == 0)
055                        return true;
056                    for (Type pTypeArg : pTypeArgs) {
057                        if (!(pTypeArg instanceof WildcardType || pTypeArg instanceof TypeVariable || pTypeArg.equals(Object.class))) 
058                            return false;
059                    }
060                    return true;
061                }
062            }
063    
064            return false;
065        }
066    
067        @Override
068            protected Object internalConvert(Object value, Type targetType) {
069            return value;
070        }
071    }