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com.google.common.collect
Class ForwardingListMultimap<K,V>

java.lang.Object
  extended by com.google.common.collect.ForwardingObject
      extended by com.google.common.collect.ForwardingMultimap<K,V>
          extended by com.google.common.collect.ForwardingListMultimap<K,V>
All Implemented Interfaces:
ListMultimap<K,V>, Multimap<K,V>
public abstract class ForwardingListMultimap<K,V>
extends ForwardingMultimap<K,V>
implements ListMultimap<K,V>

A list multimap which forwards all its method calls to another list multimap. Subclasses should override one or more methods to modify the behavior of the backing multimap as desired per the decorator pattern.

Since:
3
Author:
Kurt Alfred Kluever

Constructor Summary
protected ForwardingListMultimap()
          Constructor for use by subclasses.
 
Method Summary
protected abstract  ListMultimap<K,V> delegate()
          Returns the backing delegate instance that methods are forwarded to.
 List<V> get(K key)
          Returns a collection view of all values associated with a key.
 List<V> removeAll(Object key)
          Removes all values associated with a given key.
 List<V> replaceValues(K key, Iterable<? extends V> values)
          Stores a collection of values with the same key, replacing any existing values for that key.
 
Methods inherited from class com.google.common.collect.ForwardingMultimap
asMap, clear, containsEntry, containsKey, containsValue, entries, equals, hashCode, isEmpty, keys, keySet, put, putAll, putAll, remove, size, values
 
Methods inherited from class com.google.common.collect.ForwardingObject
toString
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface com.google.common.collect.ListMultimap
asMap, equals
 
Methods inherited from interface com.google.common.collect.Multimap
clear, containsEntry, containsKey, containsValue, entries, hashCode, isEmpty, keys, keySet, put, putAll, putAll, remove, size, values
 

Constructor Detail

ForwardingListMultimap

protected ForwardingListMultimap()
Constructor for use by subclasses.

Method Detail

delegate

protected abstract ListMultimap<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>

get

public List<V> get(@Nullable
                   K key)
Description copied from interface: Multimap
Returns a collection view of all values associated with a key. If no mappings in the multimap have the provided key, an empty collection is returned.

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

Specified by:
get in interface ListMultimap<K,V>
Specified by:
get in interface Multimap<K,V>
Overrides:
get in class ForwardingMultimap<K,V>
Parameters:
key - key to search for in multimap
Returns:
the collection of values that the key maps to

removeAll

public List<V> removeAll(@Nullable
                         Object key)
Description copied from interface: Multimap
Removes all values associated with a given key.

Specified by:
removeAll in interface ListMultimap<K,V>
Specified by:
removeAll in interface Multimap<K,V>
Overrides:
removeAll in class ForwardingMultimap<K,V>
Parameters:
key - key of entries to remove from the multimap
Returns:
the collection of removed values, or an empty collection if no values were associated with the provided key. The collection may be modifiable, but updating it will have no effect on the multimap.

replaceValues

public List<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.

Specified by:
replaceValues in interface ListMultimap<K,V>
Specified by:
replaceValues in interface Multimap<K,V>
Overrides:
replaceValues in class ForwardingMultimap<K,V>
Parameters:
key - key to store in the multimap
values - values to store in the multimap
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.
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