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.support.TypeConverterSupport; 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 034 */ 035 public class ArrayTypeConverter extends TypeConverterSupport { 036 037 @SuppressWarnings("unchecked") 038 public <T> T convertTo(Class<T> type, Exchange exchange, 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<Object> answer = new ArrayList<Object>(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 }