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;
20import java.util.List;
21
22import javax.annotation.Nullable;
23
24/**
25 * GWT emulated version of {@link ImmutableList}.
26 * TODO(cpovirk): more doc
27 *
28 * @author Hayward Chan
29 */
30abstract class ForwardingImmutableList<E> extends ImmutableList<E> {
31
32  ForwardingImmutableList() {
33  }
34
35  abstract List<E> delegateList();
36
37  public int indexOf(@Nullable Object object) {
38    return delegateList().indexOf(object);
39  }
40
41  public int lastIndexOf(@Nullable Object object) {
42    return delegateList().lastIndexOf(object);
43  }
44
45  public E get(int index) {
46    return delegateList().get(index);
47  }
48
49  public ImmutableList<E> subList(int fromIndex, int toIndex) {
50    return unsafeDelegateList(delegateList().subList(fromIndex, toIndex));
51  }
52
53  @Override public Object[] toArray() {
54    // Note that ArrayList.toArray() doesn't work here because it returns E[]
55    // instead of Object[].
56    return delegateList().toArray(new Object[size()]);
57  }
58
59  @Override public boolean equals(Object obj) {
60    return delegateList().equals(obj);
61  }
62
63  @Override public int hashCode() {
64    return delegateList().hashCode();
65  }
66
67  @Override public UnmodifiableIterator<E> iterator() {
68    return Iterators.unmodifiableIterator(delegateList().iterator());
69  }
70
71  @Override public boolean contains(@Nullable Object object) {
72    return object != null && delegateList().contains(object);
73  }
74
75  @Override public boolean containsAll(Collection<?> targets) {
76    return delegateList().containsAll(targets);
77  }
78
79  public int size() {
80    return delegateList().size();
81  }
82
83  @Override public boolean isEmpty() {
84    return delegateList().isEmpty();
85  }
86
87  @Override public <T> T[] toArray(T[] other) {
88    return delegateList().toArray(other);
89  }
90
91  @Override public String toString() {
92    return delegateList().toString();
93  }
94}
95