Package org.apache.commons.collections4.multimap

Class HashSetValuedHashMap<K,​V>

  • Type Parameters:
    K - the type of the keys in this map
    V - the type of the values in this map
    All Implemented Interfaces:
    java.io.Serializable, MultiValuedMap<K,​V>, SetValuedMap<K,​V>
    public class HashSetValuedHashMap<K,​V>
extends AbstractSetValuedMap<K,​V>
implements java.io.Serializable
    Implements a SetValuedMap, using a HashMap to provide data storage and HashSets as value collections. This is the standard implementation of a SetValuedMap.

    Note that HashSetValuedHashMap is not synchronized and is not thread-safe. If you wish to use this map from multiple threads concurrently, you must use appropriate synchronization. This class may throw exceptions when accessed by concurrent threads without synchronization.

    Since:
    4.1
    See Also:
    Serialized Form

    • Constructor Detail

      • HashSetValuedHashMap

        public HashSetValuedHashMap()
        Creates an empty HashSetValuedHashMap with the default initial map capacity (16) and the default initial set capacity (3).

      • HashSetValuedHashMap

        public HashSetValuedHashMap​(int initialSetCapacity)
        Creates an empty HashSetValuedHashMap with the default initial map capacity (16) and the specified initial set capacity.
        Parameters:
        initialSetCapacity - the initial capacity used for value collections

      • HashSetValuedHashMap

        public HashSetValuedHashMap​(int initialMapCapacity,
                            int initialSetCapacity)
        Creates an empty HashSetValuedHashMap with the specified initial map and list capacities.
        Parameters:
        initialMapCapacity - the initial hashmap capacity
        initialSetCapacity - the initial capacity used for value collections

      • HashSetValuedHashMap

        public HashSetValuedHashMap​(MultiValuedMap<? extends K,​? extends V> map)
        Creates an HashSetValuedHashMap copying all the mappings of the given map.
        Parameters:
        map - a MultiValuedMap to copy into this map

      • HashSetValuedHashMap

        public HashSetValuedHashMap​(java.util.Map<? extends K,​? extends V> map)
        Creates an HashSetValuedHashMap copying all the mappings of the given map.
        Parameters:
        map - a Map to copy into this map