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org.eclipse.core.databinding.observable.value
Class AbstractVetoableValue

java.lang.Object
  

org.eclipse.core.databinding.observable.AbstractObservable
      

org.eclipse.core.databinding.observable.value.AbstractObservableValue
          
org.eclipse.core.databinding.observable.value.AbstractVetoableValue

All Implemented Interfaces:

IObservable, IObservableValue, IVetoableValue

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public abstract class AbstractVetoableValue
extends 
AbstractObservableValue
implements 
IVetoableValue

This class is thread safe. All state accessing methods must be invoked from the current realm. Methods for adding and removing listeners may be invoked from any thread.

Since:

1.0

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Constructor Summary
AbstractVetoableValue ()           Creates a new vetoable value.
AbstractVetoableValue ( Realm realm)

 

Method Summary
protected  void	addListener ( Object listenerType, IObservablesListener listener)
void	addValueChangingListener ( IValueChangingListener listener)
protected   Object	clone ()
protected abstract  void	doSetApprovedValue ( Object value)           Sets the value.
protected  void	doSetValue ( Object value)           Template method for setting the value of the observable.
protected  void	fireEvent ( ObservableEvent event)
protected  boolean	fireValueChanging ( ValueDiff diff)           Notifies listeners about a pending change, and returns true if no listener vetoed the change.
protected  void	firstListenerAdded ()
Realm	getRealm ()
protected  boolean	hasListeners ()
protected  void	lastListenerRemoved ()
protected  void	removeListener ( Object listenerType, IObservablesListener listener)
void	removeValueChangingListener ( IValueChangingListener listener)

 

Methods inherited from class org.eclipse.core.databinding.observable.value. AbstractObservableValue
addValueChangeListener, doGetValue, fireChange, fireValueChange, getValue, isStale, removeValueChangeListener, setValue

 

Methods inherited from class org.eclipse.core.databinding.observable. AbstractObservable
addChangeListener, addDisposeListener, addStaleListener, checkRealm, dispose, fireStale, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener

 

Methods inherited from class java.lang. Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface org.eclipse.core.databinding.observable.value. IObservableValue
addValueChangeListener, getValue, getValueType, removeValueChangeListener, setValue

 

Methods inherited from interface org.eclipse.core.databinding.observable. IObservable
addChangeListener, addDisposeListener, addStaleListener, dispose, getRealm, isDisposed, isStale, removeChangeListener, removeDisposeListener, removeStaleListener

 

Constructor Detail

AbstractVetoableValue

public AbstractVetoableValue()

Creates a new vetoable value.

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AbstractVetoableValue

public AbstractVetoableValue(
Realm realm)

Parameters:

realm -

Method Detail

doSetValue

protected final void doSetValue(
Object value)

Description copied from class: AbstractObservableValue

Template method for setting the value of the observable. By default the method throws an UnsupportedOperationException .

Overrides:

doSetValue in class AbstractObservableValue

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doSetApprovedValue

protected abstract void doSetApprovedValue(
Object value)

Sets the value. Invoked after performing veto checks. Should not fire change events.

Parameters:

value -

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addValueChangingListener

public void addValueChangingListener(
IValueChangingListener listener)

Specified by:

addValueChangingListener in interface IVetoableValue

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removeValueChangingListener

public void removeValueChangingListener(
IValueChangingListener listener)

Specified by:

removeValueChangingListener in interface IVetoableValue

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fireValueChanging

protected boolean fireValueChanging(
ValueDiff diff)

Notifies listeners about a pending change, and returns true if no listener vetoed the change.

Parameters:

diff -

Returns:

false if the change was vetoed, true otherwise

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addListener

protected void addListener(
Object listenerType,
                           
IObservablesListener listener)

Parameters:

listenerType -

listener -

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removeListener

protected void removeListener(
Object listenerType,
                              
IObservablesListener listener)

Parameters:

listenerType -

listener -

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hasListeners

protected boolean hasListeners()

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fireEvent

protected void fireEvent(
ObservableEvent event)

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firstListenerAdded

protected void firstListenerAdded()

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lastListenerRemoved

protected void lastListenerRemoved()

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getRealm

public 
Realm getRealm()

Returns:

Returns the realm.

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clone

protected 
Object clone()
                throws 
CloneNotSupportedException

Overrides:

clone in class Object

Throws:

CloneNotSupportedException

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