Package org.ros.concurrent

Class Holder<T>

java.lang.Object

org.ros.concurrent.Holder<T>

public class Holder<T>
extends Object

A mutable object that may contain a value to another object. It is modifiable exactly once and must hold a non-null value when the value is inspected.

Holders are intended for receiving a result from an anonymous class.

Note that Holder is not thread safe. For a thread safe implementation, use AtomicReference. Also note that two different Holder instances are never considered equal.

Author:

damonkohler@google.com (Damon Kohler)

Method Summary

Modifier and Type	Method	Description
void	await()
boolean	await(long timeout, TimeUnit unit)
boolean	equals(Object obj)
T	get()
static <T> Holder<T>	newEmpty()
T	set(T value)

Methods inherited from class java.lang.Object

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

Method Details

newEmpty

public static <T> Holder<T> newEmpty()

set

public T set(T value)

get

public T get()

await

public void await()
           throws InterruptedException

Throws:

InterruptedException

await

public boolean await(long timeout,
 TimeUnit unit)
              throws InterruptedException

Throws:

InterruptedException

equals

public boolean equals(Object obj)

Overrides:

equals in class Object