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001    /*
002     * Copyright (C) 2010 The Guava Authors
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package com.google.common.collect;
018    
019    import com.google.common.annotations.GwtCompatible;
020    
021    import java.util.Map.Entry;
022    import java.util.Set;
023    
024    import javax.annotation.Nullable;
025    
026    /**
027     * A set multimap which forwards all its method calls to another set multimap.
028     * Subclasses should override one or more methods to modify the behavior of
029     * the backing multimap as desired per the <a
030     * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
031     *
032     * @author Kurt Alfred Kluever
033     * @since 3.0
034     */
035    @GwtCompatible
036    public abstract class ForwardingSetMultimap<K, V>
037        extends ForwardingMultimap<K, V> implements SetMultimap<K, V> {
038    
039      @Override protected abstract SetMultimap<K, V> delegate();
040    
041      @Override public Set<Entry<K, V>> entries() {
042        return delegate().entries();
043      }
044    
045      @Override public Set<V> get(@Nullable K key) {
046        return delegate().get(key);
047      }
048    
049      @Override public Set<V> removeAll(@Nullable Object key) {
050        return delegate().removeAll(key);
051      }
052    
053      @Override public Set<V> replaceValues(K key, Iterable<? extends V> values) {
054        return delegate().replaceValues(key, values);
055      }
056    }