de.intarsys.tools.event

Class EventDispatcher

java.lang.Object

de.intarsys.tools.event.EventDispatcher

All Implemented Interfaces:

INotificationListener, INotificationSupport, Serializable, EventListener

public class EventDispatcher
extends Object
implements INotificationSupport, INotificationListener, Serializable

Pluggable helper object for management and dispatching of events.

Events are forwarded immediately on "handleEvent" to all listeners in the thread of the caller.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
EventDispatcher(Object pOwner)

Method Summary

Methods

Modifier and Type	Method and Description
void	addNotificationListener(EventType type, INotificationListener listener) Add listener to the collection of objects to be informed when the receiver triggers an event of type name.
void	attach(INotificationSupport support)
void	clear()
void	detach(INotificationSupport support)
Object	getOwner()
void	handleEvent(Event event) Called when an event occurs.
boolean	hasListener()
boolean	isEmpty()
void	removeNotificationListener(EventType type, INotificationListener listener) Remove listener from the collection of objects to be informed about events of type name.
void	triggerChanged(String attribute, Object oldValue, Object newValue) Convenience method for triggering an AttributeChangedEvent.
void	triggerEvent(Event event)

Methods inherited from class java.lang.Object

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

Constructor Detail

EventDispatcher

public EventDispatcher(Object pOwner)

Method Detail

addNotificationListener

public void addNotificationListener(EventType type,
                           INotificationListener listener)

Description copied from interface: INotificationSupport

Add listener to the collection of objects to be informed when the receiver triggers an event of type name.

Specified by:

addNotificationListener in interface INotificationSupport

Parameters:

type - The event type we are interested in.

listener - The object to be informed about an event occurrence

attach

public void attach(INotificationSupport support)

clear

public void clear()

detach

public void detach(INotificationSupport support)

getOwner

public Object getOwner()

handleEvent

public void handleEvent(Event event)

Description copied from interface: INotificationListener

Called when an event occurs.

Specified by:

handleEvent in interface INotificationListener

Parameters:

event - The event object giving detail information about the context.

hasListener

public boolean hasListener()

isEmpty

public boolean isEmpty()

removeNotificationListener

public void removeNotificationListener(EventType type,
                              INotificationListener listener)

Description copied from interface: INotificationSupport

Remove listener from the collection of objects to be informed about events of type name.

Specified by:

removeNotificationListener in interface INotificationSupport

Parameters:

type - The event type we are no longer interested in.

listener - The object registered for the event till now.

triggerChanged

public void triggerChanged(String attribute,
                  Object oldValue,
                  Object newValue)

Convenience method for triggering an AttributeChangedEvent.

Parameters:

string -

triggerEvent

public void triggerEvent(Event event)