1090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson/* 2090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Copyright (C) 2007 Google Inc. 3090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * 4090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Licensed under the Apache License, Version 2.0 (the "License"); 5090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * you may not use this file except in compliance with the License. 6090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * You may obtain a copy of the License at 7090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * 8090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 9090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * 10090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Unless required by applicable law or agreed to in writing, software 11090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 12090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * See the License for the specific language governing permissions and 14090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * limitations under the License. 15090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson */ 16090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 17090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonpackage com.google.common.collect; 18090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 19090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonimport com.google.common.annotations.GwtCompatible; 20090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 21090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonimport java.util.Collection; 22090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonimport java.util.Iterator; 23090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 24090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson/** 25090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * A collection which forwards all its method calls to another collection. 26090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Subclasses should override one or more methods to modify the behavior of 27090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * the backing collection as desired per the <a 28090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>. 29090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * 30090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * @see ForwardingObject 31090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * @author Kevin Bourrillion 32bfe2dd089341dcb4c1fb65a5b6b077ad0ebbf6dcDan Egnor * @since 2010.01.04 <b>stable</b> (imported from Google Collections Library) 33090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson */ 34090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson@GwtCompatible 35090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonpublic abstract class ForwardingCollection<E> extends ForwardingObject 36090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson implements Collection<E> { 37090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 38090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson @Override protected abstract Collection<E> delegate(); 39090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 40090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public Iterator<E> iterator() { 41090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().iterator(); 42090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 43090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 44090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public int size() { 45090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().size(); 46090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 47090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 48090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public boolean removeAll(Collection<?> collection) { 49090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().removeAll(collection); 50090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 51090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 52090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public boolean isEmpty() { 53090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().isEmpty(); 54090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 55090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 56090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public boolean contains(Object object) { 57090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().contains(object); 58090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 59090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 60090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public Object[] toArray() { 61090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().toArray(); 62090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 63090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 64090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public <T> T[] toArray(T[] array) { 65090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().toArray(array); 66090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 67090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 68090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public boolean add(E element) { 69090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().add(element); 70090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 71090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 72090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public boolean remove(Object object) { 73090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().remove(object); 74090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 75090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 76090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public boolean containsAll(Collection<?> collection) { 77090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().containsAll(collection); 78090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 79090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 80090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public boolean addAll(Collection<? extends E> collection) { 81090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().addAll(collection); 82090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 83090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 84090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public boolean retainAll(Collection<?> collection) { 85090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return delegate().retainAll(collection); 86090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 87090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 88090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public void clear() { 89090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson delegate().clear(); 90090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 91090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson} 92