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 org.apache.camel.TypeConverter;
020
021 import java.lang.reflect.Array;
022 import java.util.ArrayList;
023 import java.util.Arrays;
024 import java.util.Collection;
025 import java.util.List;
026
027 /**
028 * A type converter which is used to convert to and from array types particularly for derived types of array
029 * component types and dealing with primitive array types.
030 *
031 * @version $Revision: $
032 */
033 public class ArrayTypeConverter implements TypeConverter {
034 public <T> T convertTo(Class<T> type, Object value) {
035 if (type.isArray()) {
036 if (value instanceof Collection) {
037 Collection collection = (Collection) value;
038 Object array = Array.newInstance(type.getComponentType(), collection.size());
039 if (array instanceof Object[]) {
040 collection.toArray((Object[]) array);
041 }
042 else {
043 int index = 0;
044 for (Object element : collection) {
045 Array.set(array, index++, element);
046 }
047 }
048 return (T) array;
049 }
050 else if (value != null && value.getClass().isArray()) {
051 int size = Array.getLength(value);
052 Object answer = Array.newInstance(type.getComponentType(), size);
053 for (int i = 0; i < size; i++) {
054 Array.set(answer, i, Array.get(value, i));
055 }
056 return (T) answer;
057 }
058 }
059 else if (Collection.class.isAssignableFrom(type)) {
060 if (value != null) {
061 if (value instanceof Object[]) {
062 return (T) Arrays.asList((Object[]) value);
063 }
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 }