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.ParameterizedType;
025import java.lang.reflect.Type;
026import java.lang.reflect.TypeVariable;
027import java.lang.reflect.WildcardType;
028
029import org.granite.messaging.amf.io.convert.Converter;
030import org.granite.messaging.amf.io.convert.Converters;
031import org.granite.util.TypeUtil;
032
033/**
034 * @author Franck WOLFF
035 */
036public 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}