Package org.projog.core.event

Class ProjogListeners

java.lang.Object

org.projog.core.event.ProjogListeners

public class ProjogListeners
extends java.lang.Object

Controls the registering and notification of listeners of a KnowledgeBase.

Each KnowledgeBase has a single unique ProjogListeners instance.

See Also:

KnowledgeBase.getProjogListeners()

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.Set<ProjogListener>	listeners

Constructor Summary

Constructors

Constructor	Description
ProjogListeners()

Method Summary

Modifier and Type	Method	Description
boolean	addListener(ProjogListener listener)	Adds a listener to the set of listeners.
boolean	deleteListener(ProjogListener listener)	Deletes an observer from the set of observers of this objects internal Observable.
void	notifyCall(SpyPoints.SpyPointEvent event)	Notify all listeners of a first attempt to evaluate a goal.
void	notifyExit(SpyPoints.SpyPointExitEvent event)	Notify all listeners when an attempt to evaluate a goal succeeds.
void	notifyFail(SpyPoints.SpyPointEvent event)	Notify all listeners when an attempt to evaluate a goal fails.
void	notifyInfo(java.lang.String message)	Notify all listeners of a general information event.
void	notifyRedo(SpyPoints.SpyPointEvent event)	Notify all listeners of an attempt to re-evaluate a goal.
void	notifyWarn(java.lang.String message)	Notify all listeners of a warning.

Methods inherited from class java.lang.Object

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

Field Detail

listeners

private final java.util.Set<ProjogListener> listeners

Constructor Detail

ProjogListeners

public ProjogListeners()

Method Detail

addListener

public boolean addListener(ProjogListener listener)

Adds a listener to the set of listeners.

Parameters:

listener - a listener to be added

Returns:

true if this instance did not already reference the specified listener

deleteListener

public boolean deleteListener(ProjogListener listener)

Deletes an observer from the set of observers of this objects internal Observable.

Parameters:

listener - a listener to be deleted

Returns:

true if this instance did reference the specified listener

notifyCall

public void notifyCall(SpyPoints.SpyPointEvent event)

Notify all listeners of a first attempt to evaluate a goal.

notifyRedo

public void notifyRedo(SpyPoints.SpyPointEvent event)

Notify all listeners of an attempt to re-evaluate a goal.

notifyExit

public void notifyExit(SpyPoints.SpyPointExitEvent event)

Notify all listeners when an attempt to evaluate a goal succeeds.

notifyFail

public void notifyFail(SpyPoints.SpyPointEvent event)

Notify all listeners when an attempt to evaluate a goal fails.

notifyWarn

public void notifyWarn(java.lang.String message)

Notify all listeners of a warning.

notifyInfo

public void notifyInfo(java.lang.String message)

Notify all listeners of a general information event.