edu.uci.ics.jung.algorithms.layout

Class ISOMLayout<V,E>

java.lang.Object

edu.uci.ics.jung.algorithms.layout.AbstractLayout<V,E>

edu.uci.ics.jung.algorithms.layout.ISOMLayout<V,E>

All Implemented Interfaces:

Layout<V,E>, IterativeContext, org.apache.commons.collections15.Transformer<V,java.awt.geom.Point2D>

public class ISOMLayout<V,E>
extends AbstractLayout<V,E>
implements IterativeContext

Implements a self-organizing map layout algorithm, based on Meyer's self-organizing graph methods.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	ISOMLayout.ISOMVertexData

Field Summary

Fields

Modifier and Type	Field and Description
protected GraphElementAccessor<V,E>	elementAccessor

Fields inherited from class edu.uci.ics.jung.algorithms.layout.AbstractLayout

graph, initialized, locations, size

Constructor Summary

Constructors

Constructor and Description
ISOMLayout() Creates an instance which does not initialize the vertex locations.
ISOMLayout(Graph<V,E> g) Creates an ISOMLayout instance for the specified graph g.

Method Summary

Modifier and Type	Method and Description
boolean	done() Returns true if the vertex positions are no longer being updated.
protected ISOMLayout.ISOMVertexData	getISOMVertexData(V v)
java.lang.String	getStatus() Returns the current number of epochs and execution status, as a string.
void	initialize() Initializes fields in the node that may not have been set during the constructor.
boolean	isIncremental() This one is an incremental visualization.
void	reset() Resets the layout iteration count to 0, which allows the layout algorithm to continue updating vertex positions.
void	step() Advances the current positions of the graph elements.

Methods inherited from class edu.uci.ics.jung.algorithms.layout.AbstractLayout

getGraph, getSize, getX, getY, isLocked, lock, lock, offsetVertex, setGraph, setInitializer, setLocation, setLocation, setSize, transform

Methods inherited from class java.lang.Object

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

Field Detail

elementAccessor

protected GraphElementAccessor<V,E> elementAccessor

Constructor Detail

ISOMLayout

public ISOMLayout()

Creates an instance which does not initialize the vertex locations.

ISOMLayout

public ISOMLayout(Graph<V,E> g)

Creates an ISOMLayout instance for the specified graph g.

Parameters:

g -

Method Detail

getStatus

public java.lang.String getStatus()

Returns the current number of epochs and execution status, as a string.

initialize

public void initialize()

Description copied from interface: Layout

Initializes fields in the node that may not have been set during the constructor. Must be called before the iterations begin.

Specified by:

initialize in interface Layout<V,E>

step

public void step()

Advances the current positions of the graph elements.

Specified by:

step in interface IterativeContext

getISOMVertexData

protected ISOMLayout.ISOMVertexData getISOMVertexData(V v)

isIncremental

public boolean isIncremental()

This one is an incremental visualization.

Returns:

true is the layout algorithm is incremental, false otherwise

done

public boolean done()

Returns true if the vertex positions are no longer being updated. Currently ISOMLayout stops updating vertex positions after a certain number of iterations have taken place.

Specified by:

done in interface IterativeContext

Returns:

true if the vertex position updates have stopped, false otherwise

reset

public void reset()

Resets the layout iteration count to 0, which allows the layout algorithm to continue updating vertex positions.

Specified by:

reset in interface Layout<V,E>