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package java.beans;
import java.util.EventListenerProxy;
A class which extends the EventListenerProxy
specifically for adding a VetoableChangeListener
with a "constrained" property. Instances of this class can be added as VetoableChangeListener
s to a bean which supports firing vetoable change events. If the object has a getVetoableChangeListeners
method then the array returned could be a mixture of VetoableChangeListener
and VetoableChangeListenerProxy
objects.
See Also: Since: 1.4
/**
* A class which extends the {@code EventListenerProxy}
* specifically for adding a {@code VetoableChangeListener}
* with a "constrained" property.
* Instances of this class can be added
* as {@code VetoableChangeListener}s to a bean
* which supports firing vetoable change events.
* <p>
* If the object has a {@code getVetoableChangeListeners} method
* then the array returned could be a mixture of {@code VetoableChangeListener}
* and {@code VetoableChangeListenerProxy} objects.
*
* @see java.util.EventListenerProxy
* @see VetoableChangeSupport#getVetoableChangeListeners
* @since 1.4
*/
public class VetoableChangeListenerProxy
extends EventListenerProxy<VetoableChangeListener>
implements VetoableChangeListener {
private final String propertyName;
Constructor which binds the VetoableChangeListener
to a specific property. Params: - propertyName – the name of the property to listen on
- listener – the listener object
/**
* Constructor which binds the {@code VetoableChangeListener}
* to a specific property.
*
* @param propertyName the name of the property to listen on
* @param listener the listener object
*/
public VetoableChangeListenerProxy(String propertyName, VetoableChangeListener listener) {
super(listener);
this.propertyName = propertyName;
}
Forwards the property change event to the listener delegate.
Params: - event – the property change event
Throws: - PropertyVetoException – if the recipient wishes the property
change to be rolled back
/**
* Forwards the property change event to the listener delegate.
*
* @param event the property change event
*
* @exception PropertyVetoException if the recipient wishes the property
* change to be rolled back
*/
public void vetoableChange(PropertyChangeEvent event) throws PropertyVetoException{
getListener().vetoableChange(event);
}
Returns the name of the named property associated with the listener.
Returns: the name of the named property associated with the listener
/**
* Returns the name of the named property associated with the listener.
*
* @return the name of the named property associated with the listener
*/
public String getPropertyName() {
return this.propertyName;
}
}