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

java.lang.Object
  extended by com.google.common.collect.ForwardingObject
      extended by com.google.common.collect.ForwardingMap<K,V>
          extended by com.google.common.collect.ForwardingConcurrentMap<K,V>
All Implemented Interfaces:
ConcurrentMap<K,V>, Map<K,V>

@GwtCompatible
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:
2.0 (imported from Google Collections Library)
Author:
Charles Fry

Nested Class Summary
 
Nested classes/interfaces inherited from class com.google.common.collect.ForwardingMap
ForwardingMap.StandardEntrySet, ForwardingMap.StandardKeySet, ForwardingMap.StandardValues
 
Nested classes/interfaces inherited from interface java.util.Map
Map.Entry<K,V>
 
Constructor Summary
protected ForwardingConcurrentMap()
          Constructor for use by subclasses.
 
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, standardClear, standardContainsKey, standardContainsValue, standardEntrySet, standardEquals, standardHashCode, standardIsEmpty, standardKeySet, standardPutAll, standardRemove, standardToString, standardValues, 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

protected ForwardingConcurrentMap()
Constructor for use by subclasses.

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>


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