Class java.beans.VetoableChangeSupport





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Class java.beans.VetoableChangeSupport


java.lang.Object
|
+----java.beans.VetoableChangeSupport



public class VetoableChangeSupport
extends Object
implements Serializable

This is a utility class that can be used by beans that support constrained
properties. You can use an instance of this class as a member field
of your bean and delegate various work to it.








VetoableChangeSupport(Object)







addVetoableChangeListener(VetoableChangeListener)
Add a VetoableListener to the listener list.

fireVetoableChange(String, Object, Object)
Report a vetoable property update to any registered listeners.

removeVetoableChangeListener(VetoableChangeListener)
Remove a VetoableChangeListener from the listener list.







VetoableChangeSupport

public VetoableChangeSupport(Object sourceBean)








addVetoableChangeListener

public synchronized void addVetoableChangeListener(VetoableChangeListener listener)


Add a VetoableListener to the listener list.


Parameters:
listener - The VetoableChangeListener to be added



removeVetoableChangeListener

public synchronized void removeVetoableChangeListener(VetoableChangeListener listener)


Remove a VetoableChangeListener from the listener list.


Parameters:
listener - The VetoableChangeListener to be removed



fireVetoableChange

public void fireVetoableChange(String propertyName,
Object oldValue,
Object newValue) throws PropertyVetoException


Report a vetoable property update to any registered listeners. If
anyone vetos the change, then fire a new event reverting everyone to
the old value and then rethrow the PropertyVetoException.

No event is fired if old and new are equal and non-null.


Parameters:
propertyName - The programmatic name of the property
that was changed.
oldValue - The old value of the property.
newValue - The new value of the property.
Throws: PropertyVetoException
if the recipient wishes the property
change to be rolled back.




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