001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.impl.converter;
018
019 import java.lang.reflect.Array;
020 import java.util.ArrayList;
021 import java.util.Arrays;
022 import java.util.Collection;
023 import java.util.List;
024
025 import org.apache.camel.Exchange;
026 import org.apache.camel.TypeConverter;
027
028 /**
029 * A type converter which is used to convert to and from array types
030 * particularly for derived types of array component types and dealing with
031 * primitive array types.
032 *
033 * @version $Revision: 747062 $
034 */
035 public class ArrayTypeConverter implements TypeConverter {
036
037 @SuppressWarnings("unchecked")
038 public <T> T convertTo(Class<T> type, Object value) {
039 if (type.isArray()) {
040 if (value instanceof Collection) {
041 Collection collection = (Collection)value;
042 Object array = Array.newInstance(type.getComponentType(), collection.size());
043 if (array instanceof Object[]) {
044 collection.toArray((Object[])array);
045 } else {
046 int index = 0;
047 for (Object element : collection) {
048 Array.set(array, index++, element);
049 }
050 }
051 return (T)array;
052 } else if (value != null && value.getClass().isArray()) {
053 int size = Array.getLength(value);
054 Object answer = Array.newInstance(type.getComponentType(), size);
055 for (int i = 0; i < size; i++) {
056 Array.set(answer, i, Array.get(value, i));
057 }
058 return (T)answer;
059 }
060 } else if (Collection.class.isAssignableFrom(type)) {
061 if (value != null) {
062 if (value instanceof Object[]) {
063 return (T)Arrays.asList((Object[])value);
064 } else if (value.getClass().isArray()) {
065 int size = Array.getLength(value);
066 List answer = new ArrayList(size);
067 for (int i = 0; i < size; i++) {
068 answer.add(Array.get(value, i));
069 }
070 return (T)answer;
071 }
072 }
073 }
074 return null;
075 }
076
077 public <T> T convertTo(Class<T> type, Exchange exchange, Object value) {
078 return convertTo(type, value);
079 }
080 }