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.converter; 018 019 import org.apache.camel.Converter; 020 021 import java.util.Arrays; 022 import java.util.Collection; 023 import java.util.HashSet; 024 import java.util.List; 025 import java.util.Map; 026 import java.util.Set; 027 028 /** 029 * Some core java.util Collection based 030 * <a href="http://activemq.apache.org/camel/type-converter.html">Type Converters</a> 031 * 032 * @version $Revision: 524215 $ 033 */ 034 @Converter 035 public class CollectionConverter { 036 037 /** 038 * Converts a collection to an array 039 */ 040 @Converter 041 public static Object[] toArray(Collection value) { 042 if (value == null) { 043 return null; 044 } 045 return value.toArray(); 046 } 047 048 /** 049 * Converts an array to a collection 050 */ 051 @Converter 052 public static List toList(Object[] array) { 053 return Arrays.asList(array); 054 } 055 056 @Converter 057 public static Set toSet(Object[] array) { 058 Set answer = new HashSet(); 059 for (Object element : array) { 060 answer.add(element); 061 } 062 return answer; 063 } 064 065 @Converter 066 public static Set toSet(Collection collection) { 067 return new HashSet(collection); 068 } 069 070 @Converter 071 public static Set toSet(Map map) { 072 return map.entrySet(); 073 } 074 }