org.dishevelled.observable.graph.event
Interface VetoableGraphChangeListener<N,E>

Type Parameters:

N - node value type

E - edge value type

All Superinterfaces:

EventListener

public interface VetoableGraphChangeListener<N,E>
extends EventListener

A listener that receives notification of vetoable changes about to be made to an observable graph.

Version:

$Revision$ $Date$

Author:

Michael Heuer

Method Summary

void	willClear(VetoableGraphChangeEvent<N,E> e) Notify this listener that a vetoable clear change is about to be made to the observable graph.
void	willCreateEdge(VetoableGraphChangeEvent<N,E> e) Notify this listener that a vetoable create edge change is about to be made to the observable graph.
void	willCreateNode(VetoableGraphChangeEvent<N,E> e) Notify this listener that a vetoable create node change is about to be made to the observable graph.
void	willRemoveEdge(VetoableGraphChangeEvent<N,E> e) Notify this listener that a vetoable remove edge change is about to be made to the observable graph.
void	willRemoveNode(VetoableGraphChangeEvent<N,E> e) Notify this listener that a vetoable remove node change is about to be made to the observable graph.

Method Detail

willClear

void willClear(VetoableGraphChangeEvent<N,E> e)
               throws GraphChangeVetoException

Notify this listener that a vetoable clear change is about to be made to the observable graph.

Parameters:

e - graph change event

Throws:

GraphChangeVetoException - if this listener wishes the change about to be made to be rolled back

willCreateNode

void willCreateNode(VetoableGraphChangeEvent<N,E> e)
                    throws GraphChangeVetoException

Notify this listener that a vetoable create node change is about to be made to the observable graph.

Parameters:

e - graph change event

Throws:

GraphChangeVetoException - if this listener wishes the change about to be made to be rolled back

willCreateEdge

void willCreateEdge(VetoableGraphChangeEvent<N,E> e)
                    throws GraphChangeVetoException

Notify this listener that a vetoable create edge change is about to be made to the observable graph.

Parameters:

e - graph change event

Throws:

GraphChangeVetoException - if this listener wishes the change about to be made to be rolled back

willRemoveNode

void willRemoveNode(VetoableGraphChangeEvent<N,E> e)
                    throws GraphChangeVetoException

Notify this listener that a vetoable remove node change is about to be made to the observable graph.

Parameters:

e - graph change event

Throws:

GraphChangeVetoException - if this listener wishes the change about to be made to be rolled back

willRemoveEdge

void willRemoveEdge(VetoableGraphChangeEvent<N,E> e)
                    throws GraphChangeVetoException

Notify this listener that a vetoable remove edge change is about to be made to the observable graph.

Parameters:

e - graph change event

Throws:

GraphChangeVetoException - if this listener wishes the change about to be made to be rolled back