com.google.common.util.concurrent
Class ForwardingFuture<V>

java.lang.Object
  com.google.common.collect.ForwardingObject
      com.google.common.util.concurrent.ForwardingFuture<V>

All Implemented Interfaces:

Future<V>

public abstract class ForwardingFuture<V>
extends ForwardingObject
implements Future<V>

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

Since:

2009.09.15 tentative

Author:

Sven Mawson

See Also:

ForwardingObject

Constructor Summary

ForwardingFuture()

Method Summary

boolean	cancel(boolean mayInterruptIfRunning)
protected abstract Future<V>	delegate() Returns the backing delegate instance that methods are forwarded to.
V	get()
V	get(long timeout, TimeUnit unit)
boolean	isCancelled()
boolean	isDone()

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

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ForwardingFuture

public ForwardingFuture()

Method Detail

delegate

protected abstract Future<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 ForwardingObject

cancel

public boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface Future<V>

isCancelled

public boolean isCancelled()

Specified by:

isCancelled in interface Future<V>

isDone

public boolean isDone()

Specified by:

isDone in interface Future<V>

get

public V get()
      throws InterruptedException,
             ExecutionException

Specified by:

get in interface Future<V>

Throws:

InterruptedException

ExecutionException

get

public V get(long timeout,
             TimeUnit unit)
      throws InterruptedException,
             ExecutionException,
             TimeoutException

Specified by:

get in interface Future<V>

Throws:

InterruptedException

ExecutionException

TimeoutException