net.ontopia.topicmaps.impl.utils
Class ObjectTreeManager

java.lang.Object
  net.ontopia.topicmaps.impl.utils.ObjectTreeManager

All Implemented Interfaces:

java.io.Serializable, EventListenerIF, EventManagerIF

public class ObjectTreeManager
extends java.lang.Object
implements EventManagerIF, java.io.Serializable

INTERNAL: Event manager that fires object added and removed events for children of added or removed objects.

This class is itself an event listener that listens to the standard property change events fired by the object model. Objects that are added or removed are traversed and further events for the children of those objects are fired.

If your event listeners depends on knowing when objects are added or removed use this class instead of doing the traversal yourself.

See Also:

Serialized Form

Nested Class Summary

protected class

ObjectTreeManager.EventHandler

Field Summary

protected CollectionFactoryIF	cfactory
protected java.util.Map<java.lang.String,ObjectTreeManager.EventHandler>	handlers
protected java.util.Map<java.lang.String,java.util.Set<EventListenerIF>>	listeners
protected ObjectTreeManager	otree

Constructor Summary

ObjectTreeManager(EventManagerIF emanager, CollectionFactoryIF cfactory)

Method Summary

void	addListener(EventListenerIF listener, java.lang.String event) INTERNAL: Register the listener as a listener for the event.
void	processEvent(java.lang.Object object, java.lang.String event, java.lang.Object new_value, java.lang.Object old_value) INTERNAL: A method that receives notification when an event has been triggered.
void	removeListener(EventListenerIF listener, java.lang.String event) INTERNAL: Unregister the listener as a listener for the event.

Methods inherited from class java.lang.Object

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

Field Detail

handlers

protected java.util.Map<java.lang.String,ObjectTreeManager.EventHandler> handlers

listeners

protected java.util.Map<java.lang.String,java.util.Set<EventListenerIF>> listeners

otree

protected ObjectTreeManager otree

cfactory

protected CollectionFactoryIF cfactory

Constructor Detail

ObjectTreeManager

public ObjectTreeManager(EventManagerIF emanager,
                         CollectionFactoryIF cfactory)

Method Detail

addListener

public void addListener(EventListenerIF listener,
                        java.lang.String event)

Description copied from interface: EventManagerIF

INTERNAL: Register the listener as a listener for the event.

Specified by:

addListener in interface EventManagerIF

removeListener

public void removeListener(EventListenerIF listener,
                           java.lang.String event)

Description copied from interface: EventManagerIF

INTERNAL: Unregister the listener as a listener for the event.

Specified by:

removeListener in interface EventManagerIF

processEvent

public void processEvent(java.lang.Object object,
                         java.lang.String event,
                         java.lang.Object new_value,
                         java.lang.Object old_value)

Description copied from interface: EventListenerIF

INTERNAL: A method that receives notification when an event has been triggered.

Specified by:

processEvent in interface EventListenerIF