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org.apache.myfaces.trinidad.util.ref
Interface PseudoReference<T>

All Known Implementing Classes:

ReferencePseudoReference, StrongPseudoReference

public interface PseudoReference<T>

Interface for dealing with both strong references and java.lang.ref.Reference Objects interchangably. If Java supported a StrongReference subclass of Reference, this interface would not be necessary.

Method Summary

void	clear() Clears this reference object.
boolean	enqueue() Adds this reference object to the queue with which it is registered, if any.
T	get() Returns this reference object's referent.
boolean	isEnqueued() Tells whether or not this reference object has been enqueued, either by the program or by the garbage collector.

Method Detail

get

T get()

Returns this reference object's referent. If this reference object has been cleared, either by the program or by the garbage collector, then this method returns null.

Returns:

The object to which this reference refers, or null if this reference object has been cleared

clear

void clear()

Clears this reference object. Invoking this method will not cause this object to be enqueued.

This method is invoked only by Java code; when the garbage collector clears references it does so directly, without invoking this method.

isEnqueued

boolean isEnqueued()

Tells whether or not this reference object has been enqueued, either by the program or by the garbage collector. If this reference object was not registered with a queue when it was created, then this method will always return false.

Returns:

true if and only if this reference object has been enqueued

enqueue

boolean enqueue()

Adds this reference object to the queue with which it is registered, if any.

This method is invoked only by Java code; when the garbage collector enqueues references it does so directly, without invoking this method.

Returns:

true if this reference object was successfully enqueued; false if it was already enqueued or if it was not registered with a queue when it was created

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