/*
    * Copyright (C) 2012 The Guava Authors
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.google.common.collect;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.base.Predicate;
  
  import java.util.Map.Entry;
  import java.util.Set;
  
  import javax.annotation.Nullable;
  
  /**
   * Implementation of {@link Multimaps#filterKeys(SetMultimap, Predicate)}.
   * 
   * @author Louis Wasserman
   */
  @GwtCompatible
  final class FilteredKeySetMultimap<K, V> extends FilteredKeyMultimap<K, V>
      implements FilteredSetMultimap<K, V> {
  
    FilteredKeySetMultimap(SetMultimap<K, V> unfiltered, Predicate<? super K> keyPredicate) {
      super(unfiltered, keyPredicate);
    }
  
    @Override
    public SetMultimap<K, V> unfiltered() {
      return (SetMultimap<K, V>) unfiltered;
    }
  
    @Override
    public Set<V> get(K key) {
      return (Set<V>) super.get(key);
    }
  
    @Override
    public Set<V> removeAll(Object key) {
      return (Set<V>) super.removeAll(key);
    }
  
    @Override
    public Set<V> replaceValues(K key, Iterable<? extends V> values) {
      return (Set<V>) super.replaceValues(key, values);
    }
  
    @Override
    public Set<Entry<K, V>> entries() {
      return (Set<Entry<K, V>>) super.entries();
    }
  
    @Override
    Set<Entry<K, V>> createEntries() {
      return new EntrySet();
    }
    
    class EntrySet extends Entries implements Set<Entry<K, V>> {
      @Override
      public int hashCode() {
        return Sets.hashCodeImpl(this);
      }
      
      @Override
      public boolean equals(@Nullable Object o) {
        return Sets.equalsImpl(this, o);
      }
    }
  }