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 }