org.ros.concurrent

Class Holder<T>

java.lang.Object

org.ros.concurrent.Holder<T>

public class Holder<T>
extends java.lang.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.

Method Summary

Methods

Modifier and Type	Method and Description
void	await()
boolean	await(long timeout, java.util.concurrent.TimeUnit unit)
boolean	equals(java.lang.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 Detail

newEmpty

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

set

public T set(T value)

get

public T get()

await

public void await()
           throws java.lang.InterruptedException

Throws:

java.lang.InterruptedException

await

public boolean await(long timeout,
            java.util.concurrent.TimeUnit unit)
              throws java.lang.InterruptedException

Throws:

java.lang.InterruptedException

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object