Package org.eclipse.core.databinding.observable.value

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 org.eclipse.core.databinding.observable.value.DecoratingObservableValue

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

Methods inherited from class org.eclipse.core.databinding.observable.DecoratingObservable

equals, getDecorated, getterCalled, handleStaleEvent, hashCode, isStale

Methods inherited from class org.eclipse.core.databinding.observable.AbstractObservable

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

Methods inherited from interface org.eclipse.core.databinding.observable.value.IObservableValue

addValueChangeListener, getValue, getValueType, removeValueChangeListener

Constructor Detail

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 Detail

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