ForwardingConcurrentMap

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>
```
@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)

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

Constructors

Modifier	Constructor and Description
`protected`	`ForwardingConcurrentMap()` Constructor for use by subclasses.

Method Summary

All Methods

Instance Methods

Abstract Methods

Concrete Methods
Modifier and Type	Method and Description
`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, standardEquals, standardHashCode, standardIsEmpty, standardPutAll, standardRemove, standardToString, 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.concurrent.ConcurrentMap
compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, replaceAll

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.

putIfAbsent

public V putIfAbsent(K key,
                     V value)

remove

public boolean remove(Object key,
                      Object value)

replace

public V replace(K key,
                 V value)

replace

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