001    /*
002     * Copyright (C) 2010 Google Inc.
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.Comparator;
022    import java.util.SortedSet;
023    
024    import javax.annotation.Nullable;
025    
026    /**
027     * A sorted set multimap which forwards all its method calls to another sorted
028     * set multimap. Subclasses should override one or more methods to modify the
029     * behavior of 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
034     */
035    @GwtCompatible
036    public abstract class ForwardingSortedSetMultimap<K, V>
037        extends ForwardingSetMultimap<K, V> implements SortedSetMultimap<K, V> {
038    
039      /** Constructor for use by subclasses. */
040      protected ForwardingSortedSetMultimap() {}
041    
042      @Override protected abstract SortedSetMultimap<K, V> delegate();
043    
044      @Override public SortedSet<V> get(@Nullable K key) {
045        return delegate().get(key);
046      }
047    
048      @Override public SortedSet<V> removeAll(@Nullable Object key) {
049        return delegate().removeAll(key);
050      }
051    
052      @Override public SortedSet<V> replaceValues(
053          K key, Iterable<? extends V> values) {
054        return delegate().replaceValues(key, values);
055      }
056    
057      @Override public Comparator<? super V> valueComparator() {
058        return delegate().valueComparator();
059      }
060    }