Interface SetMultimap<K,V>

    • Method Detail

      • get

        Set<V> get(K key)
        Returns a view collection of the values associated with key in this multimap, if any. Note that when containsKey(key) is false, this returns an empty collection, not null.

        Changes to the returned collection will update the underlying multimap, and vice versa.

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

      • removeAll

        Set<V> removeAll(Object key)
        Removes all values associated with the key key.

        Once this method returns, key will not be mapped to any values, so it will not appear in Multimap.keySet(), Multimap.asMap(), or any other views.

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

        Specified by:
        removeAll in interface  Multimap<K,V>
        Returns:
        the values that were removed (possibly empty). The returned collection may be modifiable, but updating it will have no effect on the multimap.
      • replaceValues

        Set<V> replaceValues(K key,
                             Iterable<? extends V> values)
        Stores a collection of values with the same key, replacing any existing values for that key.

        If values is empty, this is equivalent to removeAll(key).

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

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

        Specified by:
        replaceValues in interface  Multimap<K,V>
        Returns:
        the collection of replaced values, or an empty collection if no values were previously associated with the key. The collection may be modifiable, but updating it will have no effect on the multimap.
      • entries

        Set<Map.Entry<K,V>> entries()
        Returns a view collection of all key-value pairs contained in this multimap, as Map.Entry instances.

        Changes to the returned collection or the entries it contains will update the underlying multimap, and vice versa. However, adding to the returned collection is not possible.

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

      • asMap

        Map<K,Collection<V>> asMap()
        Returns a view of this multimap as a Map from each distinct key to the nonempty collection of that key's associated values. Note that this.asMap().get(k) is equivalent to this.get(k) only when k is a key contained in the multimap; otherwise it returns null as opposed to an empty collection.

        Changes to the returned map or the collections that serve as its values will update the underlying multimap, and vice versa. The map does not support put or putAll, nor do its entries support setValue.

        Note: The returned map's values are guaranteed to be of type Set. To obtain this map with the more specific generic type Map<K, Set<V>>, call Multimaps.asMap(SetMultimap) instead.

      • equals

        boolean equals(Object obj)
        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.

        An empty SetMultimap is equal to any other empty Multimap, including an empty ListMultimap.