1/*
2 * Copyright (C) 2012 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 com.google.common.annotations.GwtCompatible;
20import com.google.common.base.Predicate;
21
22import java.util.Map.Entry;
23import java.util.Set;
24
25import javax.annotation.Nullable;
26
27/**
28 * Implementation of {@link Multimaps#filterKeys(SetMultimap, Predicate)}.
29 *
30 * @author Louis Wasserman
31 */
32@GwtCompatible
33final class FilteredKeySetMultimap<K, V> extends FilteredKeyMultimap<K, V>
34    implements FilteredSetMultimap<K, V> {
35
36  FilteredKeySetMultimap(SetMultimap<K, V> unfiltered, Predicate<? super K> keyPredicate) {
37    super(unfiltered, keyPredicate);
38  }
39
40  @Override
41  public SetMultimap<K, V> unfiltered() {
42    return (SetMultimap<K, V>) unfiltered;
43  }
44
45  @Override
46  public Set<V> get(K key) {
47    return (Set<V>) super.get(key);
48  }
49
50  @Override
51  public Set<V> removeAll(Object key) {
52    return (Set<V>) super.removeAll(key);
53  }
54
55  @Override
56  public Set<V> replaceValues(K key, Iterable<? extends V> values) {
57    return (Set<V>) super.replaceValues(key, values);
58  }
59
60  @Override
61  public Set<Entry<K, V>> entries() {
62    return (Set<Entry<K, V>>) super.entries();
63  }
64
65  @Override
66  Set<Entry<K, V>> createEntries() {
67    return new EntrySet();
68  }
69
70  class EntrySet extends Entries implements Set<Entry<K, V>> {
71    @Override
72    public int hashCode() {
73      return Sets.hashCodeImpl(this);
74    }
75
76    @Override
77    public boolean equals(@Nullable Object o) {
78      return Sets.equalsImpl(this, o);
79    }
80  }
81}
82