org.jboss.msc.value
Class InjectedValue<T>

java.lang.Object
  org.jboss.msc.inject.RetainingInjector<T>
      org.jboss.msc.value.InjectedValue<T>

Type Parameters:

T - the value type

All Implemented Interfaces:

Injector<T>, Value<T>

public final class InjectedValue<T>
extends RetainingInjector<T>
implements Injector<T>, Value<T>

A value which is injected from another source. The value may only be read if the injector has populated it.

Author:

David M. Lloyd

Constructor Summary

InjectedValue()
Construct a new instance.

Method Summary

T	getOptionalValue() Get the value if it was injected, or return null if it was not.
T	getValue() Get the actual value.
void	setValue(Value<T> value) Set the value to be injected to a Value instance.

Methods inherited from class org.jboss.msc.inject.RetainingInjector

getStoredValue, inject, setStoredValue, uninject

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.msc.inject.Injector

inject, uninject

Constructor Detail

InjectedValue

public InjectedValue()

Construct a new instance.

Method Detail

getValue

public T getValue()
           throws IllegalStateException

Get the actual value.

Specified by:

getValue in interface Value<T>

Returns:

the actual value

Throws:

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

setValue

public void setValue(Value<T> value)

Set the value to be injected to a Value instance.

Parameters:

value - the value to set, cannot be null (though it may be Values.nullValue())

getOptionalValue

public T getOptionalValue()

Get the value if it was injected, or return null if it was not.

Returns:

the value or null if it was not injected