salvo.jesus.graph.listener

Class NullGraphListener

java.lang.Object

salvo.jesus.graph.listener.NullGraphListener

All Implemented Interfaces:

Serializable, EventListener, GraphListener

Direct Known Subclasses:

ConnectedSetListener, DirectedAcyclicGraphListener, ImmutableGraphListener, PathListener, SimplePathListener, TreeListener, VisualGraph

public class NullGraphListener
extends Object
implements GraphListener

NullGraphListener is an implementation of GraphListener which just ignores all events. Subclasses can override specific events and leave others ignored without having to provide stubs.

Version:

$Id: NullGraphListener.java,v 1.2 2002/03/12 07:48:34 perfecthash Exp $

Author:

John V. Sichi

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
NullGraphListener()

Method Summary

Modifier and Type	Method and Description
void	afterEdgeAdded(GraphAddEdgeEvent event) Called when an edge is being added to a graph, just after the graph structure has actually been changed.
void	afterEdgeRemoved(GraphRemoveEdgeEvent event) Called when an edge is being removed from a graph, just after the graph structure has actually been changed.
void	afterVertexAdded(GraphAddVertexEvent event) Called when a vertex is being added to a graph, just after the graph structure has actually been changed.
void	afterVertexRemoved(GraphRemoveVertexEvent event) Called when a vertex is being removed from a graph, just after the graph structure has actually been changed.
void	beforeEdgeAdded(GraphAddEdgeEvent event) Called when an edge is being added to a graph, just before the graph structure is actually changed.
void	beforeEdgeRemoved(GraphRemoveEdgeEvent event) Called when an edge is being removed from a graph, just before the graph structure is actually changed.
void	beforeVertexAdded(GraphAddVertexEvent event) Called when a vertex is being added to a graph, just before the graph structure is actually changed.
void	beforeVertexRemoved(GraphRemoveVertexEvent event) Called when a vertex is being removed from a graph, just before the graph structure is actually changed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NullGraphListener

public NullGraphListener()

Method Detail

beforeVertexAdded

public void beforeVertexAdded(GraphAddVertexEvent event)
                       throws Exception

Description copied from interface: GraphListener

Called when a vertex is being added to a graph, just before the graph structure is actually changed.

Specified by:

beforeVertexAdded in interface GraphListener

Parameters:

event - the event describing the vertex addition

Throws:

Exception

afterVertexAdded

public void afterVertexAdded(GraphAddVertexEvent event)

Description copied from interface: GraphListener

Called when a vertex is being added to a graph, just after the graph structure has actually been changed.

Specified by:

afterVertexAdded in interface GraphListener

Parameters:

event - the event describing the vertex addition

beforeVertexRemoved

public void beforeVertexRemoved(GraphRemoveVertexEvent event)
                         throws Exception

Description copied from interface: GraphListener

Called when a vertex is being removed from a graph, just before the graph structure is actually changed.

Specified by:

beforeVertexRemoved in interface GraphListener

Parameters:

event - the event describing the vertex removal

Throws:

Exception

afterVertexRemoved

public void afterVertexRemoved(GraphRemoveVertexEvent event)

Description copied from interface: GraphListener

Called when a vertex is being removed from a graph, just after the graph structure has actually been changed.

Specified by:

afterVertexRemoved in interface GraphListener

Parameters:

event - the event describing the vertex removal

beforeEdgeAdded

public void beforeEdgeAdded(GraphAddEdgeEvent event)
                     throws Exception

Description copied from interface: GraphListener

Called when an edge is being added to a graph, just before the graph structure is actually changed.

Specified by:

beforeEdgeAdded in interface GraphListener

Parameters:

event - the event describing the edge addition

Throws:

Exception

afterEdgeAdded

public void afterEdgeAdded(GraphAddEdgeEvent event)

Description copied from interface: GraphListener

Called when an edge is being added to a graph, just after the graph structure has actually been changed.

Specified by:

afterEdgeAdded in interface GraphListener

Parameters:

event - the event describing the edge addition

beforeEdgeRemoved

public void beforeEdgeRemoved(GraphRemoveEdgeEvent event)
                       throws Exception

Description copied from interface: GraphListener

Called when an edge is being removed from a graph, just before the graph structure is actually changed.

Specified by:

beforeEdgeRemoved in interface GraphListener

Parameters:

event - the event describing the edge removal

Throws:

Exception

afterEdgeRemoved

public void afterEdgeRemoved(GraphRemoveEdgeEvent event)

Description copied from interface: GraphListener

Called when an edge is being removed from a graph, just after the graph structure has actually been changed.

Specified by:

afterEdgeRemoved in interface GraphListener

Parameters:

event - the event describing the edge removal