Class Multimaps.UnmodifiableMultimap<K,V>

java.lang.Object
com.google.common.collect.ForwardingObject
com.google.common.collect.ForwardingMultimap<K,V>
com.google.common.collect.Multimaps.UnmodifiableMultimap<K,V>
All Implemented Interfaces:
Multimap<K,V>, Serializable
Direct Known Subclasses:
Multimaps.UnmodifiableListMultimap, Multimaps.UnmodifiableSetMultimap
Enclosing class:
Multimaps

private static class Multimaps.UnmodifiableMultimap<K,V> extends ForwardingMultimap<K,V> implements Serializable
  • Field Details

  • Constructor Details

    • UnmodifiableMultimap

      UnmodifiableMultimap(Multimap<K,V> delegate)
  • Method Details

    • delegate

      protected Multimap<K,V> delegate()
      Description copied from class: ForwardingObject
      Returns the backing delegate instance that methods are forwarded to. Abstract subclasses generally override this method with an abstract method that has a more specific return type, such as ForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.
      Specified by:
      delegate in class ForwardingMultimap<K,V>
    • clear

      public void clear()
      Description copied from interface: Multimap
      Removes all key-value pairs from the multimap, leaving it empty.
      Specified by:
      clear in interface Multimap<K,V>
      Overrides:
      clear in class ForwardingMultimap<K,V>
    • asMap

      public Map<K,Collection<V>> asMap()
      Description copied from interface: Multimap
      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.

      Specified by:
      asMap in interface Multimap<K,V>
      Overrides:
      asMap in class ForwardingMultimap<K,V>
    • entries

      public Collection<Map.Entry<K,V>> entries()
      Description copied from interface: Multimap
      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.

      Specified by:
      entries in interface Multimap<K,V>
      Overrides:
      entries in class ForwardingMultimap<K,V>
    • forEach

      public void forEach(BiConsumer<? super K,? super V> consumer)
      Description copied from interface: Multimap
      Performs the given action for all key-value pairs contained in this multimap. If an ordering is specified by the Multimap implementation, actions will be performed in the order of iteration of Multimap.entries(). Exceptions thrown by the action are relayed to the caller.

      To loop over all keys and their associated value collections, write Multimaps.asMap(multimap).forEach((key, valueCollection) -> action()).

      Specified by:
      forEach in interface Multimap<K,V>
    • get

      public Collection<V> get(K key)
      Description copied from interface: Multimap
      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.

      Specified by:
      get in interface Multimap<K,V>
      Overrides:
      get in class ForwardingMultimap<K,V>
    • keys

      public Multiset<K> keys()
      Description copied from interface: Multimap
      Returns a view collection containing the key from each key-value pair in this multimap, without collapsing duplicates. This collection has the same size as this multimap, and keys().count(k) == get(k).size() for all k.

      Changes to the returned multiset will update the underlying multimap, and vice versa. However, adding to the returned collection is not possible.

      Specified by:
      keys in interface Multimap<K,V>
      Overrides:
      keys in class ForwardingMultimap<K,V>
    • keySet

      public Set<K> keySet()
      Description copied from interface: Multimap
      Returns a view collection of all distinct keys contained in this multimap. Note that the key set contains a key if and only if this multimap maps that key to at least one value.

      Changes to the returned set will update the underlying multimap, and vice versa. However, adding to the returned set is not possible.

      Specified by:
      keySet in interface Multimap<K,V>
      Overrides:
      keySet in class ForwardingMultimap<K,V>
    • put

      public boolean put(K key, V value)
      Description copied from interface: Multimap
      Stores a key-value pair in this multimap.

      Some multimap implementations allow duplicate key-value pairs, in which case put always adds a new key-value pair and increases the multimap size by 1. Other implementations prohibit duplicates, and storing a key-value pair that's already in the multimap has no effect.

      Specified by:
      put in interface Multimap<K,V>
      Overrides:
      put in class ForwardingMultimap<K,V>
      Returns:
      true if the method increased the size of the multimap, or false if the multimap already contained the key-value pair and doesn't allow duplicates
    • putAll

      public boolean putAll(K key, Iterable<? extends V> values)
      Description copied from interface: Multimap
      Stores a key-value pair in this multimap for each of values, all using the same key, key. Equivalent to (but expected to be more efficient than):
      
       for (V value : values) {
         put(key, value);
       }
       

      In particular, this is a no-op if values is empty.

      Specified by:
      putAll in interface Multimap<K,V>
      Overrides:
      putAll in class ForwardingMultimap<K,V>
      Returns:
      true if the multimap changed
    • putAll

      public boolean putAll(Multimap<? extends K,? extends V> multimap)
      Description copied from interface: Multimap
      Stores all key-value pairs of multimap in this multimap, in the order returned by multimap.entries().
      Specified by:
      putAll in interface Multimap<K,V>
      Overrides:
      putAll in class ForwardingMultimap<K,V>
      Returns:
      true if the multimap changed
    • remove

      public boolean remove(@CheckForNull Object key, @CheckForNull Object value)
      Description copied from interface: Multimap
      Removes a single key-value pair with the key key and the value value from this multimap, if such exists. If multiple key-value pairs in the multimap fit this description, which one is removed is unspecified.
      Specified by:
      remove in interface Multimap<K,V>
      Overrides:
      remove in class ForwardingMultimap<K,V>
      Returns:
      true if the multimap changed
    • removeAll

      public Collection<V> removeAll(@CheckForNull Object key)
      Description copied from interface: Multimap
      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.

      Specified by:
      removeAll in interface Multimap<K,V>
      Overrides:
      removeAll in class ForwardingMultimap<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

      public Collection<V> replaceValues(K key, Iterable<? extends V> values)
      Description copied from interface: Multimap
      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).

      Specified by:
      replaceValues in interface Multimap<K,V>
      Overrides:
      replaceValues in class ForwardingMultimap<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.
    • values

      public Collection<V> values()
      Description copied from interface: Multimap
      Returns a view collection containing the value from each key-value pair contained in this multimap, without collapsing duplicates (so values().size() == size()).

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

      Specified by:
      values in interface Multimap<K,V>
      Overrides:
      values in class ForwardingMultimap<K,V>