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Eclipse Platform
Release 3.5

org.eclipse.core.databinding.observable
Class DecoratingObservable

java.lang.Object
  extended by 

org.eclipse.core.databinding.observable.AbstractObservable
      extended by 
org.eclipse.core.databinding.observable.DecoratingObservable
All Implemented Interfaces:
IDecoratingObservable, IObservable
Direct Known Subclasses:
DecoratingObservableCollection, DecoratingObservableMap, DecoratingObservableValue

public class DecoratingObservable
extends AbstractObservable
implements IDecoratingObservable

An observable which decorates another observable

Since:
1.2

Constructor Summary
DecoratingObservable ( IObservable decorated, boolean disposeDecoratedOnDispose)
          Constructs a DecoratingObservable which decorates the given observable.
 
Method Summary
protected  void addListener ( Object listenerType, IObservablesListener listener)
           
protected   Object clone ()
           
 void dispose ()
          Disposes of this observable object, removing all listeners registered with this object, and all listeners this object might have registered on other objects.
 boolean equals ( Object obj)
           
protected  void fireEvent ( ObservableEvent event)
           
protected  void firstListenerAdded ()
           
  IObservable getDecorated ()
           
  Realm getRealm ()
           
protected  void getterCalled ()
           
protected  void handleStaleEvent ( StaleEvent event)
          Called whenever a StaleEvent is received from the decorated observable.
 int hashCode ()
           
protected  boolean hasListeners ()
           
 boolean isStale ()
          Returns whether the state of this observable is stale and is expected to change soon.
protected  void lastListenerRemoved ()
           
protected  void removeListener ( Object listenerType, IObservablesListener listener)
           
 
Methods inherited from class org.eclipse.core.databinding.observable. AbstractObservable
addChangeListener, addDisposeListener, addStaleListener, checkRealm, fireChange, fireStale, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener
 
Methods inherited from class java.lang. Object
finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.eclipse.core.databinding.observable. IObservable
addChangeListener, addDisposeListener, addStaleListener, getRealm, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener
 

Constructor Detail

DecoratingObservable

public DecoratingObservable(
IObservable decorated,
                            boolean disposeDecoratedOnDispose)
Constructs a DecoratingObservable which decorates the given observable.

Parameters:
decorated - the observable being decorated.
disposeDecoratedOnDispose - whether the decorated observable should be disposed when the decorator is disposed
Method Detail

getDecorated

public 
IObservable getDecorated()
Specified by:
getDecorated in interface IDecoratingObservable
Returns:
the observable that this observable decorates.

isStale

public boolean isStale()
Description copied from interface: IObservable
Returns whether the state of this observable is stale and is expected to change soon. A non-stale observable that becomes stale will notify its stale listeners. A stale object that becomes non-stale does so by changing its state and notifying its change listeners, it does not notify its stale listeners about becoming non-stale. Clients that do not expect asynchronous changes may ignore staleness of observable objects.

Specified by:
isStale in interface IObservable
Returns:
true if this observable's state is stale and will change soon.

getterCalled

protected void getterCalled()

firstListenerAdded

protected void firstListenerAdded()

lastListenerRemoved

protected void lastListenerRemoved()

handleStaleEvent

protected void handleStaleEvent(
StaleEvent event)
Called whenever a StaleEvent is received from the decorated observable. By default, this method fires the stale event again, with the decorating observable as the event source. Subclasses may override to provide different behavior.

Parameters:
event - the stale event received from the decorated observable

equals

public boolean equals(
Object obj)
Overrides:
equals in class Object

hashCode

public int hashCode()
Overrides:
hashCode in class Object

dispose

public void dispose()
Description copied from interface: IObservable
Disposes of this observable object, removing all listeners registered with this object, and all listeners this object might have registered on other objects.

Specified by:
dispose in interface IObservable
Overrides:
dispose in class AbstractObservable

addListener

protected void addListener(
Object listenerType,
                           
IObservablesListener listener)
Parameters:
listenerType -
listener -

removeListener

protected void removeListener(
Object listenerType,
                              
IObservablesListener listener)
Parameters:
listenerType -
listener -

hasListeners

protected boolean hasListeners()

fireEvent

protected void fireEvent(
ObservableEvent event)

getRealm

public 
Realm getRealm()
Returns:
Returns the realm.

clone

protected 
Object clone()
                throws 
CloneNotSupportedException
Overrides:
clone in class Object
Throws:
CloneNotSupportedException

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