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

java.lang.Object
  com.google.common.collect.ForwardingObject
      com.google.common.collect.ForwardingMap<K,V>
          com.google.common.collect.ForwardingConcurrentMap<K,V>

All Implemented Interfaces:

ConcurrentMap<K,V>, Map<K,V>

public abstract class ForwardingConcurrentMap<K,V>
extends ForwardingMap<K,V>
implements ConcurrentMap<K,V>

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

Since:

2010.01.04 stable (imported from Google Collections Library)

Author:

Charles Fry

See Also:

ForwardingObject

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

ForwardingConcurrentMap()

Method Summary

protected abstract ConcurrentMap<K,V>	delegate() Returns the backing delegate instance that methods are forwarded to.
V	putIfAbsent(K key, V value)
boolean	remove(Object key, Object value)
V	replace(K key, V value)
boolean	replace(K key, V oldValue, V newValue)

Methods inherited from class com.google.common.collect.ForwardingMap

clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, 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 java.util.Map

clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values

Constructor Detail

ForwardingConcurrentMap

public ForwardingConcurrentMap()

Method Detail

delegate

protected abstract ConcurrentMap<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 ForwardingMap<K,V>

putIfAbsent

public V putIfAbsent(K key,
                     V value)

Specified by:

putIfAbsent in interface ConcurrentMap<K,V>

remove

public boolean remove(Object key,
                      Object value)

Specified by:

remove in interface ConcurrentMap<K,V>

replace

public V replace(K key,
                 V value)

Specified by:

replace in interface ConcurrentMap<K,V>

replace

public boolean replace(K key,
                       V oldValue,
                       V newValue)

Specified by:

replace in interface ConcurrentMap<K,V>