1 /*
2  * Copyright (C) 2010 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 
17 package com.google.common.collect;
18 
19 import com.google.common.annotations.GwtCompatible;
20 
21 import java.util.Map.Entry;
22 import java.util.Set;
23 
24 import javax.annotation.Nullable;
25 
26 /**
27  * A set multimap which forwards all its method calls to another set multimap.
28  * Subclasses should override one or more methods to modify the behavior of
29  * the backing multimap as desired per the <a
30  * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
31  *
32  * @author Kurt Alfred Kluever
33  * @since 3.0
34  */
35 @GwtCompatible
36 public abstract class ForwardingSetMultimap<K, V>
37     extends ForwardingMultimap<K, V> implements SetMultimap<K, V> {
38 
delegate()39   @Override protected abstract SetMultimap<K, V> delegate();
40 
entries()41   @Override public Set<Entry<K, V>> entries() {
42     return delegate().entries();
43   }
44 
get(@ullable K key)45   @Override public Set<V> get(@Nullable K key) {
46     return delegate().get(key);
47   }
48 
removeAll(@ullable Object key)49   @Override public Set<V> removeAll(@Nullable Object key) {
50     return delegate().removeAll(key);
51   }
52 
replaceValues(K key, Iterable<? extends V> values)53   @Override public Set<V> replaceValues(K key, Iterable<? extends V> values) {
54     return delegate().replaceValues(key, values);
55   }
56 }
57