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.Array;
024import java.lang.reflect.Type;
025
026import org.granite.messaging.amf.io.convert.Converter;
027import org.granite.messaging.amf.io.convert.Converters;
028import org.granite.messaging.amf.io.convert.IllegalConverterArgumentException;
029import org.granite.util.ArrayUtil;
030
031/**
032 * @author Franck WOLFF
033 */
034public class Array2Array extends Converter {
035
036    public Array2Array(Converters converters) {
037        super(converters);
038    }
039
040    @Override
041        protected boolean internalCanConvert(Object value, Type targetType) {
042        Type targetComponentType = ArrayUtil.getComponentType(targetType);
043
044        if (targetComponentType == null)
045            return false; // not an array.
046
047        if (value == null)
048            return true;
049
050        if (!value.getClass().isArray())
051            return false;
052
053        Class<?> oComponentClass = value.getClass().getComponentType();
054        if (targetComponentType.equals(oComponentClass))
055            return true;
056
057        Converter itemConverter = null;
058        final int length = Array.getLength(value);
059        for (int i = 0; i < length; i++) {
060            Object item = Array.get(value, i);
061
062            if (itemConverter == null)
063                itemConverter = converters.getConverter(item, targetComponentType);
064            else if (!itemConverter.canConvert(item, targetComponentType))
065                itemConverter = converters.getConverter(item, targetComponentType);
066
067            if (itemConverter == null)
068                return false;
069        }
070
071        return true;
072    }
073
074    @Override
075        protected Object internalConvert(Object value, Type targetType) {
076
077        if (value == null)
078            return null;
079
080        if (value.getClass().isArray()) {
081            Type targetComponentType = ArrayUtil.getComponentType(targetType);
082            if (targetComponentType != null) {
083                Class<?> oComponentClass = value.getClass().getComponentType();
084                if (targetComponentType.equals(oComponentClass))
085                    return value;
086
087                Converter itemConverter = null;
088                final int length = Array.getLength(value);
089                final Object array = ArrayUtil.newArray(targetComponentType, length);
090                for (int i = 0; i < length; i++) {
091                    Object item = Array.get(value, i);
092
093                    if (itemConverter == null)
094                        itemConverter = converters.getConverter(item, targetComponentType);
095                    else if (!itemConverter.canConvert(item, targetComponentType))
096                        itemConverter = converters.getConverter(item, targetComponentType);
097
098                    if (itemConverter == null)
099                        throw new IllegalConverterArgumentException(this, value, targetType);
100
101                    Array.set(array, i, itemConverter.convert(item, targetComponentType));
102                }
103                return array;
104            }
105        }
106
107        throw new IllegalConverterArgumentException(this, value, targetType);
108    }
109}