salvo.jesus.graph.listener

Class TreeListener

java.lang.Object

salvo.jesus.graph.listener.NullGraphListener

salvo.jesus.graph.listener.TreeListener

All Implemented Interfaces:

Serializable, EventListener, GraphListener

public class TreeListener
extends NullGraphListener

TreeListener imposes a tree structure on a Graph. It can be used as a delegate by any class which wants to implement the Tree interface.

Version:

$Id: TreeListener.java,v 1.4 2002/08/31 15:54:52 jmsalvo Exp $

Author:

John V. Sichi

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TreeListener(Tree tree) Creates a new TreeListener for the given Tree.

Method Summary

Modifier and Type	Method and Description
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.
List	getChildren(Vertex vertex)
int	getDepth(Vertex node)
int	getHeight()
List	getLeaves()
Vertex	getParent(Vertex vertex)
Vertex	getRoot()
Tree	getSubTree(Vertex subTreeRootVertex)
boolean	isLeaf(Vertex vertex)
void	setRoot(Vertex rootVertex)

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

afterEdgeAdded, afterEdgeRemoved

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeListener

public TreeListener(Tree tree)

Creates a new TreeListener for the given Tree.

Parameters:

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

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

Overrides:

beforeVertexAdded in class NullGraphListener

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

Overrides:

afterVertexAdded in class NullGraphListener

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

Overrides:

beforeVertexRemoved in class NullGraphListener

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

Overrides:

afterVertexRemoved in class NullGraphListener

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

Overrides:

beforeEdgeAdded in class NullGraphListener

Parameters:

event - the event describing the edge addition

Throws:

Exception

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

Overrides:

beforeEdgeRemoved in class NullGraphListener

Parameters:

event - the event describing the edge removal

Throws:

Exception

setRoot

public void setRoot(Vertex rootVertex)
             throws GraphException

Throws:

GraphException

See Also:

Tree.setRoot(salvo.jesus.graph.Vertex)

getRoot

public Vertex getRoot()

See Also:

Tree.getRoot()

isLeaf

public boolean isLeaf(Vertex vertex)
               throws GraphException

Throws:

GraphException

See Also:

Tree.isLeaf(salvo.jesus.graph.Vertex)

getParent

public Vertex getParent(Vertex vertex)
                 throws GraphException

Throws:

GraphException

See Also:

Tree.getParent(salvo.jesus.graph.Vertex)

getChildren

public List getChildren(Vertex vertex)
                 throws GraphException

Throws:

GraphException

See Also:

Tree.getChildren(salvo.jesus.graph.Vertex)

getSubTree

public Tree getSubTree(Vertex subTreeRootVertex)
                throws Exception

Throws:

Exception

See Also:

Tree.getSubTree(salvo.jesus.graph.Vertex)

getDepth

public int getDepth(Vertex node)
             throws GraphException

Throws:

GraphException

See Also:

Tree.getDepth(salvo.jesus.graph.Vertex)

getLeaves

public List getLeaves()

See Also:

Tree.getLeaves()

getHeight

public int getHeight()

See Also:

Tree.getHeight()