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