org.jboss.msc.value

Class CachedValue<T>

java.lang.Object

org.jboss.msc.value.CachedValue<T>

Type Parameters:

T - the value type

All Implemented Interfaces:

Value<T>

public final class CachedValue<T>
extends java.lang.Object
implements Value<T>

A value which is calculated once only. After the initial calculation, the result is cached and returned.

Field Summary

Fields

Modifier and Type	Field and Description
private Value<? extends T>	value

Constructor Summary

Constructors

Constructor and Description
CachedValue(Value<? extends T> value) Construct a new instance.

Method Summary

Modifier and Type	Method and Description
T	getValue() Get the actual value.

Methods inherited from class java.lang.Object

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

Field Detail

value

private volatile Value<? extends T> value

Constructor Detail

CachedValue

public CachedValue(Value<? extends T> value)

Construct a new instance.

Parameters:

value - the value from which this value is calculated

Method Detail

getValue

public T getValue()
           throws java.lang.IllegalStateException

Get the actual value.

Specified by:

getValue in interface Value<T>

Returns:

the actual value

Throws:

java.lang.IllegalStateException - if the value is time-sensitive and the current state does not allow retrieval.