public interface VetoableSubject extends Subject
VetoableSubject
interface defines the API to register observers interested in receiving notifications of pending subject changes. Classes that want to veto a pending Subject
change should attach an VetoObserver
to a VetoableSubject
in order to approve the change.oracle.ide.VetoableObserver
, oracle.ide.VetoableMessage
Modifier and Type | Method and Description |
---|---|
void |
notifyVetoObservers(java.lang.Object subject, UpdateMessage change)
Notifies all observers that the state of the subject has changed.
|
attach, detach, notifyObservers
void notifyVetoObservers(java.lang.Object subject, UpdateMessage change) throws ChangeVetoException
subject
- the subject whose state has changed.change
- what changed.ChangeVetoException
- if any VetoObserver rejected the pending change.