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Eclipse Platform
Release 3.5

org.eclipse.core.databinding.observable
Class ObservableEvent

java.lang.Object
  extended by 

java.util.EventObject
      extended by 
org.eclipse.core.databinding.observable.ObservableEvent
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
ChangeEvent, DisposeEvent, ListChangeEvent, MapChangeEvent, SetChangeEvent, StaleEvent, ValueChangeEvent, ValueChangingEvent

public abstract class ObservableEvent
extends EventObject

Abstract event object for events fired by IObservable objects. All events fired by observables must be derived from this class so that the way of dispatching events can be improved in later versions of the framework.

Since:
1.0
See Also:
Serialized Form

Field Summary
 
Fields inherited from class java.util. EventObject
source
 
Constructor Summary
ObservableEvent ( IObservable source)
          Creates a new observable event.
 
Method Summary
protected abstract  void dispatch ( IObservablesListener listener)
          Dispatch this event to the given listener.
protected abstract   Object getListenerType ()
          Returns a unique object used for distinguishing this event type from others.
  IObservable getObservable ()
          Returns the observable that generated this event.
 
Methods inherited from class java.util. EventObject
getSource, toString
 
Methods inherited from class java.lang. Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ObservableEvent

public ObservableEvent(
IObservable source)
Creates a new observable event.

Parameters:
source -
Method Detail

getObservable

public 
IObservable getObservable()
Returns the observable that generated this event.

Returns:
the observable that generated this event

dispatch

protected abstract void dispatch(
IObservablesListener listener)
Dispatch this event to the given listener. Subclasses must implement this method by calling the appropriate type-safe event handling method on the given listener according to the type of this event.

Parameters:
listener - the listener that should handle the event

getListenerType

protected abstract 
Object getListenerType()
Returns a unique object used for distinguishing this event type from others.

Returns:
a unique object representing the concrete type of this event.

Eclipse Platform
Release 3.5

Guidelines for using Eclipse APIs.

Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire