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.Array;
025 import java.lang.reflect.Type;
026 import java.util.Collection;
027
028 import org.granite.messaging.amf.io.convert.Converter;
029 import org.granite.messaging.amf.io.convert.Converters;
030 import org.granite.messaging.amf.io.convert.IllegalConverterArgumentException;
031 import org.granite.util.TypeUtil;
032 import org.granite.util.CollectionUtil;
033
034 /**
035 * @author Franck WOLFF
036 */
037 public class Array2Collection extends Converter {
038
039 public Array2Collection(Converters converters) {
040 super(converters);
041 }
042
043 @Override
044 protected boolean internalCanConvert(Object value, Type targetType) {
045
046 Type targetComponentType = CollectionUtil.getComponentType(targetType);
047 if (targetComponentType == null)
048 return false; // not a collection.
049
050 if (value == null)
051 return true;
052
053 if (!value.getClass().isArray())
054 return false;
055
056 Class<?> oComponentClass = value.getClass().getComponentType();
057 if (targetComponentType.equals(oComponentClass))
058 return true;
059
060 Converter itemConverter = null;
061 final int length = Array.getLength(value);
062 for (int i = 0; i < length; i++) {
063 Object item = Array.get(value, i);
064
065 if (itemConverter == null)
066 itemConverter = converters.getConverter(item, targetComponentType);
067 else if (!itemConverter.canConvert(item, targetComponentType))
068 itemConverter = converters.getConverter(item, targetComponentType);
069
070 if (itemConverter == null)
071 return false;
072 }
073
074 return true;
075 }
076
077 @Override
078 protected Object internalConvert(Object value, Type targetType) {
079
080 if (value == null)
081 return null;
082
083 if (value.getClass().isArray()) {
084 Type targetComponentType = CollectionUtil.getComponentType(targetType);
085
086 if (targetComponentType != null) {
087 final int length = Array.getLength(value);
088 Class<?> targetClass = TypeUtil.classOfType(targetType);
089
090 Collection<Object> targetInstance = null;
091 try {
092 targetInstance = CollectionUtil.newCollection(targetClass, Array.getLength(value));
093 } catch (Exception e) {
094 throw new IllegalConverterArgumentException(this, value, targetType, e);
095 }
096
097 Converter itemConverter = null;
098 for (int i = 0; i < length; i++) {
099 Object item = Array.get(value, i);
100
101 if (itemConverter == null)
102 itemConverter = converters.getConverter(item, targetComponentType);
103 else if (!itemConverter.canConvert(item, targetComponentType))
104 itemConverter = converters.getConverter(item, targetComponentType);
105
106 if (itemConverter == null)
107 throw new IllegalConverterArgumentException(this, value, targetType);
108
109 targetInstance.add(itemConverter.convert(item, targetComponentType));
110 }
111
112 return targetInstance;
113 }
114 }
115
116 throw new IllegalConverterArgumentException(this, value, targetType);
117 }
118 }