salvo.jesus.graph.listener

Class CyclePathListener

java.lang.Object

salvo.jesus.graph.listener.NullGraphListener

salvo.jesus.graph.listener.SimplePathListener

salvo.jesus.graph.listener.CyclePathListener

All Implemented Interfaces:

Serializable, EventListener, GraphListener, AbstractPathListener

public class CyclePathListener
extends SimplePathListener

CyclePathListener extends SimplePathListener to allow a cycle to be defined. It can be used as a delegate by any class which wants to implement the CyclePath interface.

Version:

$Id: CyclePathListener.java,v 1.1 2002/03/12 07:48:34 perfecthash Exp $

Author:

John V. Sichi

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CyclePathListener(CyclePath cyclePath, boolean bClosed) Creates a new CyclePathListener for the given graph.

Method Summary

Modifier and Type	Method and Description
void	beforeEdgeAdded(GraphAddEdgeEvent event) Called when an edge is being added to a graph, just before the graph structure is actually changed.

Methods inherited from class salvo.jesus.graph.listener.SimplePathListener

afterEdgeAdded, afterEdgeRemoved, afterVertexAdded, afterVertexRemoved, beforeEdgeRemoved, beforeVertexAdded, getFirstVertex, getLastVertex, getPath, isEndpoint, remove

Methods inherited from class salvo.jesus.graph.listener.NullGraphListener

beforeVertexRemoved

Methods inherited from class java.lang.Object

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

Methods inherited from interface salvo.jesus.graph.GraphListener

beforeVertexRemoved

Constructor Detail

CyclePathListener

public CyclePathListener(CyclePath cyclePath,
                         boolean bClosed)

Creates a new CyclePathListener for the given graph.

Parameters:

cyclePath - the graph to which this listener is to be attached; this constructor will automatically register the listener to receive all events

bClosed - true if cyclePath is already closed

Method Detail

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

Overrides:

beforeEdgeAdded in class SimplePathListener

Parameters:

event - the event describing the edge addition

Throws:

Exception