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  /*
   * Copyright (C) 2007 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 java.util.Map;
 import java.util.Set;
 
Basic implementation of the SetMultimap interface. It's a wrapper around AbstractMultimap that converts the returned collections into Sets. The createCollection() method must return a Set.

Author(s):
Jared Levy
 
 abstract class AbstractSetMultimap<K, V>
     extends AbstractMultimap<K, V> implements SetMultimap<K, V> {
  
Creates a new multimap that uses the provided map.

Parameters:
map place to store the mapping from each key to its corresponding values
 
   protected AbstractSetMultimap(Map<K, Collection<V>> map) {
     super(map);
   }
 
   @Override abstract Set<V> createCollection();
 
   // Following Javadoc copied from SetMultimap.
 
  

Because a SetMultimap has unique values for a given key, this method returns a java.util.Set, instead of the java.util.Collection specified in the Multimap interface.

 
   @Override public Set<V> get(@Nullable K key) {
     return (Set<V>) super.get(key);
   }

  

Because a SetMultimap has unique values for a given key, this method returns a java.util.Set, instead of the java.util.Collection specified in the Multimap interface.

 
   @Override public Set<Map.Entry<K, V>> entries() {
     return (Set<Map.Entry<K, V>>) super.entries();
   }

  

Because a SetMultimap has unique values for a given key, this method returns a java.util.Set, instead of the java.util.Collection specified in the Multimap interface.

 
   @Override public Set<V> removeAll(@Nullable Object key) {
     return (Set<V>) super.removeAll(key);
   }

  

Because a SetMultimap has unique values for a given key, this method returns a java.util.Set, instead of the java.util.Collection specified in the Multimap interface.

Any duplicates in values will be stored in the multimap once.

 
   @Override public Set<V> replaceValues(
       @Nullable K keyIterable<? extends V> values) {
     return (Set<V>) super.replaceValues(keyvalues);
   }

  

Though the method signature doesn't say so explicitly, the returned map has java.util.Set values.

  @Override public Map<K, Collection<V>> asMap() {
    return super.asMap();
  }

  
Stores a key-value pair in the multimap.

Parameters:
key key to store in the multimap
value value to store in the multimap
Returns:
true if the method increased the size of the multimap, or false if the multimap already contained the key-value pair
  @Override public boolean put(K key, V value) {
    return super.put(keyvalue);
  }

  
Compares the specified object to this multimap for equality.

Two SetMultimap instances are equal if, for each key, they contain the same values. Equality does not depend on the ordering of keys or values.

  @Override public boolean equals(@Nullable Object object) {
    return super.equals(object);
  }
  private static final long serialVersionUID = 7431625294878419160L;
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