1/* 2 * Copyright (C) 2009 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.google.common.collect; 18 19import java.util.Collection; 20 21import javax.annotation.Nullable; 22 23/** 24 * A GWT-only class only used by GWT emulations. It is used to consolidate the 25 * definitions of method delegation to save code size. 26 * 27 * @author Hayward Chan 28 */ 29// TODO: Make this class GWT serializable. 30class ForwardingImmutableCollection<E> extends ImmutableCollection<E> { 31 32 transient final Collection<E> delegate; 33 34 ForwardingImmutableCollection(Collection<E> delegate) { 35 this.delegate = delegate; 36 } 37 38 @Override public UnmodifiableIterator<E> iterator() { 39 return Iterators.unmodifiableIterator(delegate.iterator()); 40 } 41 42 @Override public boolean contains(@Nullable Object object) { 43 return object != null && delegate.contains(object); 44 } 45 46 @Override public boolean containsAll(Collection<?> targets) { 47 return delegate.containsAll(targets); 48 } 49 50 public int size() { 51 return delegate.size(); 52 } 53 54 @Override public boolean isEmpty() { 55 return delegate.isEmpty(); 56 } 57 58 @Override public Object[] toArray() { 59 return delegate.toArray(); 60 } 61 62 @Override public <T> T[] toArray(T[] other) { 63 return delegate.toArray(other); 64 } 65 66 @Override public String toString() { 67 return delegate.toString(); 68 } 69} 70