org.hypergraphdb.event

Class HGDefaultEventManager

java.lang.Object

org.hypergraphdb.event.HGDefaultEventManager

All Implemented Interfaces:

HGEventManager, HGGraphHolder

public class HGDefaultEventManager
extends Object
implements HGEventManager

Constructor Summary

Constructors

Constructor and Description
HGDefaultEventManager()
HGDefaultEventManager(HyperGraph graph)

Method Summary

Methods

Modifier and Type	Method and Description
<T extends HGEvent> void	addListener(Class<T> eventType, HGListener listener) Register a new listener for a given event type.
void	clear() Removal all event listeners for all event types.
HGListener.Result	dispatch(HyperGraph hg, HGEvent event) Dispatch an event to all listeners registered for its type.
HyperGraph	getHyperGraph()
void	initListenerMap()
<T extends HGEvent> void	removeListener(Class<T> eventType, HGListener listener) Remove a listener registered for the particular type.
void	setHyperGraph(HyperGraph graph) During load time, set the HyperGraph instance to which this atom belongs.

Methods inherited from class java.lang.Object

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

Constructor Detail

HGDefaultEventManager

public HGDefaultEventManager()

HGDefaultEventManager

public HGDefaultEventManager(HyperGraph graph)

Method Detail

initListenerMap

public void initListenerMap()

addListener

public <T extends HGEvent> void addListener(Class<T> eventType,
                                   HGListener listener)

Description copied from interface: HGEventManager

Register a new listener for a given event type.

Specified by:

addListener in interface HGEventManager

removeListener

public <T extends HGEvent> void removeListener(Class<T> eventType,
                                      HGListener listener)

Description copied from interface: HGEventManager

Remove a listener registered for the particular type.

Specified by:

removeListener in interface HGEventManager

dispatch

public HGListener.Result dispatch(HyperGraph hg,
                         HGEvent event)

Description copied from interface: HGEventManager

Dispatch an event to all listeners registered for its type. All listeners are invoked in the order in which they were registered. If a listener returns a HGListener.Result.cancel event, the dispatch process is interrupted and the cancellation is passed on to the caller of the dispatch method without invoking any further listeners.

Because event types can be organized in hierarchy, rooted at HGEvent, a dispatcher must call listener registered for the particular event class and also all its superclasses up to the HGEvent type itself.

Specified by:

dispatch in interface HGEventManager

Returns:

clear

public void clear()

Description copied from interface: HGEventManager

Removal all event listeners for all event types.

Specified by:

clear in interface HGEventManager

setHyperGraph

public void setHyperGraph(HyperGraph graph)

Description copied from interface: HGGraphHolder

During load time, set the HyperGraph instance to which this atom belongs.

Specified by:

setHyperGraph in interface HGGraphHolder

getHyperGraph

public HyperGraph getHyperGraph()