Package org.jboss.weld.util.collections

Class SetMultimap<K,V>

java.lang.Object
org.jboss.weld.util.collections.SetMultimap<K,V>
Type Parameters:
K - The key type
V - The value type
All Implemented Interfaces:
Serializable, Multimap<K,V>
public class SetMultimap<K,V> extends Object
A Multimap whose collections of values are backed by a Set.
Author:
Martin Kouba
See Also:

  • Field Details

  • Method Details

    • newSetMultimap

      public static <K, V> SetMultimap<K,V> newSetMultimap()
      Creates a new instance backed by a HashMap and HashSet.

    • newSetMultimap

      public static <K, V> SetMultimap<K,V> newSetMultimap(Multimap<K,V> multimap)
      Creates a new instance backed by a HashMap and HashSet. All key-value mappings are copied from the input multimap. If any collection of values in the input multimap contains duplicate elements, these are removed in the constructed multimap.
      Parameters:
      multimap -

    • newConcurrentSetMultimap

      public static <K, V> SetMultimap<K,V> newConcurrentSetMultimap()
      Creates a new instance backed by a ConcurrentHashMap and synchronized HashSet.

    • newConcurrentSetMultimap

      public static <K, V> SetMultimap<K,V> newConcurrentSetMultimap(Supplier<Set<V>> valueSupplier)
      Creates a new instance backed by a ConcurrentHashMap and synchronized HashSet.

    • size

      public int size()
      Description copied from interface: Multimap
      Unlike Guava'sMultimap#size() this method returns the number of key-value mappings.
      Specified by:
      size in interface Multimap<K,V>
      Returns:
      the number of key-value mappings

    • isEmpty

      public boolean isEmpty()
      Specified by:
      isEmpty in interface Multimap<K,V>
      Returns:
      true if there are no key-value mappings

    • get

      public Set<V> get(K key)
      Description copied from interface: Multimap
      This method never returns null. If no collection of values for a given key exists a new value collection is initialized.
      Specified by:
      get in interface Multimap<K,V>
      Returns:
      the collection of values for the given key

    • put

      public boolean put(K key, V value)
      Specified by:
      put in interface Multimap<K,V>
      Returns:
      true if the the size of the collection associated with the given key increased, false otherwise (e.g. if the collection of values doesn't allow duplicates)

    • putAll

      public boolean putAll(K key, Collection<? extends V> values)
      Specified by:
      putAll in interface Multimap<K,V>
      Returns:
      true if the the size of the collection associated with the given key increased, false otherwise (e.g. if the collection of values doesn't allow duplicates)

    • replaceValues

      public Set<V> replaceValues(K key, Iterable<? extends V> values)
      Description copied from interface: Multimap
      Note that the original collection of values is completely replaced by a new collection which contains all elements from the given iterable. If the collection of values doesn't allow duplicates, these elements are removed.
      Specified by:
      replaceValues in interface Multimap<K,V>
      Returns:
      the collection of replaced values

    • containsKey

      public boolean containsKey(Object key)
      Specified by:
      containsKey in interface Multimap<K,V>
      Returns:
      true if the multimap contains a mapping for the given key

    • keySet

      public Set<K> keySet()
      Specified by:
      keySet in interface Multimap<K,V>
      Returns:
      an immutable set of keys

    • values

      public List<V> values()
      Description copied from interface: Multimap
      The list may include the same value multiple times if it occurs in multiple mappings or if the collection of values for the mapping allows duplicate elements.
      Specified by:
      values in interface Multimap<K,V>
      Returns:
      an immutable list of all the values in the multimap

    • uniqueValues

      public Set<V> uniqueValues()
      Specified by:
      uniqueValues in interface Multimap<K,V>
      Returns:
      an immutable set of all the values in the multimap

    • entrySet

      public Set<Map.Entry<K,Collection<V>>> entrySet()
      Description copied from interface: Multimap
      Map.Entry.getValue() always returns an unmodifiable collection. Map.Entry.setValue(Object) operation is not supported.
      Specified by:
      entrySet in interface Multimap<K,V>
      Returns:
      an immutable set of all key-value pairs

    • clear

      public void clear()
      Description copied from interface: Multimap
      Removes all of the mappings.
      Specified by:
      clear in interface Multimap<K,V>

    • toString

      public String toString()
      Overrides:
      toString in class Object