Class DecoratingVetoableValue<T>

java.lang.Object

org.eclipse.core.databinding.observable.AbstractObservable

org.eclipse.core.databinding.observable.DecoratingObservable

org.eclipse.core.databinding.observable.value.DecoratingObservableValue<T>

org.eclipse.core.databinding.observable.value.DecoratingVetoableValue<T>

Type Parameters:

T - the type of value being observed

All Implemented Interfaces:

IDecoratingObservable, IObservable, IObservableValue<T>, IVetoableValue<T>

public class DecoratingVetoableValue<T>
extends DecoratingObservableValue<T>
implements IVetoableValue<T>

An IVetoableValue decorator for an observable value.

Since:

1.2

Constructor Summary

Constructors

Constructor	Description
DecoratingVetoableValue(IObservableValue<T> decorated, boolean disposeDecoratedOnDispose)

Method Summary

Modifier and Type	Method	Description
protected void	addListener(Object listenerType, IObservablesListener listener)
void	addValueChangingListener(IValueChangingListener<T> listener)
protected Object	clone()
protected void	fireEvent(ObservableEvent event)
protected boolean	fireValueChanging(ValueDiff<T> diff)	Notifies listeners about a pending change, and returns true if no listener vetoed the change.
Realm	getRealm()
protected boolean	hasListeners()
protected void	removeListener(Object listenerType, IObservablesListener listener)
void	removeValueChangingListener(IValueChangingListener<T> listener)
void	setValue(T value)	Sets the value.

Methods inherited from class DecoratingObservableValue

addValueChangeListener, dispose, fireChange, fireValueChange, firstListenerAdded, getValue, getValueType, handleValueChange, lastListenerRemoved, removeValueChangeListener

Methods inherited from class DecoratingObservable

equals, getDecorated, getterCalled, handleStaleEvent, hashCode, isStale

Methods inherited from class AbstractObservable

addChangeListener, addDisposeListener, addStaleListener, checkRealm, fireStale, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener

Methods inherited from class Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface IObservable

addChangeListener, addDisposeListener, addStaleListener, dispose, getRealm, isDisposed, isStale, removeChangeListener, removeDisposeListener, removeStaleListener

Methods inherited from interface IObservableValue

addValueChangeListener, getValue, getValueType, removeValueChangeListener

Constructor Details

DecoratingVetoableValue

public DecoratingVetoableValue(IObservableValue<T> decorated,
 boolean disposeDecoratedOnDispose)

Parameters:

decorated - the observable value being decorated

disposeDecoratedOnDispose - whether the decorated observable should be disposed when the decorator is disposed

Method Details

setValue

public void setValue(T value)

Description copied from interface: IObservableValue

Sets the value. Must be invoked in the Realm of the observable.

Specified by:

setValue in interface IObservableValue<T>

Overrides:

setValue in class DecoratingObservableValue<T>

Parameters:

value - the value to set

addValueChangingListener

public void addValueChangingListener(IValueChangingListener<T> listener)

Specified by:

addValueChangingListener in interface IVetoableValue<T>

Parameters:

listener - the listener to add; not null

removeValueChangingListener

public void removeValueChangingListener(IValueChangingListener<T> listener)

Specified by:

removeValueChangingListener in interface IVetoableValue<T>

Parameters:

listener - the listener to remove; not null

fireValueChanging

protected boolean fireValueChanging(ValueDiff<T> diff)

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

Parameters:

diff - the pending change

Returns:

false if the change was vetoed, true otherwise

addListener

protected void addListener(Object listenerType,
 IObservablesListener listener)

Parameters:

listenerType - arbitrary object to identify a type of the listener

listener - the listener to add; not null

removeListener

protected void removeListener(Object listenerType,
 IObservablesListener listener)

Parameters:

listenerType - arbitrary object to identify a type of the listener

listener - the listener to remove; not null

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