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.TypeConverter; 026 027 /** 028 * A type converter which is used to convert to and from array types 029 * particularly for derived types of array component types and dealing with 030 * primitive array types. 031 * 032 * @version $Revision: 660275 $ 033 */ 034 public class ArrayTypeConverter implements TypeConverter { 035 036 public <T> T convertTo(Class<T> type, Object value) { 037 if (type.isArray()) { 038 if (value instanceof Collection) { 039 Collection collection = (Collection)value; 040 Object array = Array.newInstance(type.getComponentType(), collection.size()); 041 if (array instanceof Object[]) { 042 collection.toArray((Object[])array); 043 } else { 044 int index = 0; 045 for (Object element : collection) { 046 Array.set(array, index++, element); 047 } 048 } 049 return (T)array; 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 } else if (Collection.class.isAssignableFrom(type)) { 059 if (value != null) { 060 if (value instanceof Object[]) { 061 return (T)Arrays.asList((Object[])value); 062 } else if (value.getClass().isArray()) { 063 int size = Array.getLength(value); 064 List answer = new ArrayList(size); 065 for (int i = 0; i < size; i++) { 066 answer.add(Array.get(value, i)); 067 } 068 return (T)answer; 069 } 070 } 071 } 072 return null; 073 } 074 }