protected void fireVetoableChange ( PropertyChangeEvent event ) throws PropertyVetoException { if ( isEventDispatchEnabled ( ) ) { Assert . notNull ( event , "The PropertyChangeEvent cannot be null!" ) ; if ( vetoableChangeSupport . hasListeners ( event . getPropertyName ( ) ) ) { vetoableChangeSupport . fireVetoableChange ( event ) ; } } }
Notifies all VetoableChangeListeners of a property change event occurring on this Bean . The change to the property may potentially be vetoed by one of the VetoableChangeListeners listening to property changes on this Bean resulting in preventing the value of the property to change .