| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.converter; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Hashtable; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.Set; |
| |
| import org.apache.camel.Converter; |
| |
| /** |
| * Some core java.util Collection based |
| * <a href="http://camel.apache.org/type-converter.html">Type Converters</a> |
| */ |
| @Converter(loader = true) |
| public final class CollectionConverter { |
| |
| /** |
| * Utility classes should not have a public constructor. |
| */ |
| private CollectionConverter() { |
| } |
| |
| /** |
| * Converts a collection to an array |
| */ |
| @Converter |
| public static Object[] toArray(Collection<?> value) { |
| return value.toArray(); |
| } |
| |
| /** |
| * Converts an array to a collection |
| */ |
| @Converter |
| public static List<Object> toList(Object[] array) { |
| return Arrays.asList(array); |
| } |
| |
| /** |
| * Converts a collection to a List if it is not already |
| */ |
| @Converter |
| public static <T> List<T> toList(Collection<T> collection) { |
| return new ArrayList<>(collection); |
| } |
| |
| /** |
| * Converts an {@link Iterator} to a {@link ArrayList} |
| */ |
| @Converter |
| public static <T> ArrayList<T> toArrayList(Iterator<T> it) { |
| ArrayList<T> list = new ArrayList<>(); |
| while (it.hasNext()) { |
| list.add(it.next()); |
| } |
| return list; |
| } |
| |
| @Converter |
| public static Set<Object> toSet(Object[] array) { |
| Set<Object> answer = new HashSet<>(); |
| answer.addAll(Arrays.asList(array)); |
| return answer; |
| } |
| |
| @Converter |
| public static <T> Set<T> toSet(Collection<T> collection) { |
| return new HashSet<>(collection); |
| } |
| |
| @Converter |
| public static <K, V> Set<Map.Entry<K, V>> toSet(Map<K, V> map) { |
| return map.entrySet(); |
| } |
| |
| @Converter |
| public static Properties toProperties(Map<Object, Object> map) { |
| Properties answer = new Properties(); |
| answer.putAll(map); |
| return answer; |
| } |
| |
| @Converter |
| public static <K, V> Hashtable<K, V> toHashtable(Map<? extends K, ? extends V> map) { |
| return new Hashtable<>(map); |
| } |
| |
| @Converter |
| public static <K, V> HashMap<K, V> toHashMap(Map<? extends K, ? extends V> map) { |
| return new HashMap<>(map); |
| } |
| |
| /** |
| * Converts an {@link Iterable} into a {@link List} |
| */ |
| @Converter |
| public static <T> List<T> toList(Iterable<T> iterable) { |
| if (iterable instanceof List) { |
| return (List<T>) iterable; |
| } |
| List<T> result = new LinkedList<>(); |
| for (T value : iterable) { |
| result.add(value); |
| } |
| return result; |
| } |
| } |