salvo.jesus.graph.listener

Class ImmutableGraphListener

java.lang.Object

salvo.jesus.graph.listener.NullGraphListener

salvo.jesus.graph.listener.ImmutableGraphListener

All Implemented Interfaces:

Serializable, EventListener, GraphListener

public class ImmutableGraphListener
extends NullGraphListener

ImmutableGraphListener enforces immutability of a graph by asserting whenever someone tries to change the graph.

Author:

John V. Sichi

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ImmutableGraphListener(Graph graph) Creates a new ImmutableGraphListener, making the argument immutable until this Listener is removed

Method Summary

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

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

afterEdgeAdded, afterEdgeRemoved, afterVertexAdded, afterVertexRemoved

Methods inherited from class java.lang.Object

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

Constructor Detail

ImmutableGraphListener

public ImmutableGraphListener(Graph graph)

Creates a new ImmutableGraphListener, making the argument immutable until this Listener is removed

Parameters:

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

Method Detail

beforeEdgeAdded

public void beforeEdgeAdded(GraphAddEdgeEvent e)

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:

e - the event describing the edge addition

beforeVertexAdded

public void beforeVertexAdded(GraphAddVertexEvent e)

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:

e - the event describing the vertex addition

beforeEdgeRemoved

public void beforeEdgeRemoved(GraphRemoveEdgeEvent e)

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:

e - the event describing the edge removal

beforeVertexRemoved

public void beforeVertexRemoved(GraphRemoveVertexEvent e)

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:

e - the event describing the vertex removal