org.graphstream.algorithm.generator
Class PointsOfInterestGenerator

java.lang.Object
  org.graphstream.stream.SourceBase
      org.graphstream.algorithm.generator.BaseGenerator
          org.graphstream.algorithm.generator.PointsOfInterestGenerator

All Implemented Interfaces:

Generator, org.graphstream.stream.Source

public class PointsOfInterestGenerator
extends BaseGenerator

Generate a social dynamic graph. Graph is composed of high-connected group of nodes, modeling organizations, and few connections between organizations. This is done by creating points of interest. Nodes can be interested by these points or loose them interest. When two nodes are interested by at least one common point, then there are connected. Some probabilities can be set defining the following events :

• remove a node ;
• add a node ;
• remove a point of interest ;
• add a point of interest.

Initial parameters are :

• initial count of points of interest ;
• initial count of nodes ;

Author:

Guilhelm Savin

Nested Class Summary

static class

PointsOfInterestGenerator.Parameter

Nested classes/interfaces inherited from class org.graphstream.stream.SourceBase

org.graphstream.stream.SourceBase.ElementType

Constructor Summary

PointsOfInterestGenerator()

Method Summary

void	begin() Add initial count of points of interest, and initial count of people.
void	end() End the graph generation by finalizing it.
static void	main(String... args)
boolean	nextEvents() Step of the generator.
void	setParameter(PointsOfInterestGenerator.Parameter p, Object value)

Methods inherited from class org.graphstream.algorithm.generator.BaseGenerator

addEdgeAttribute, addEdgeLabels, addNodeAttribute, addNodeLabels, isUsingInternalGraph, removeEdgeAttribute, removeNodeAttribute, setDirectedEdges, setEdgeAttributesRange, setNodeAttributesRange, setRandomSeed, setUseInternalGraph

Methods inherited from class org.graphstream.stream.SourceBase

addAttributeSink, addElementSink, addSink, attributeSinks, clearAttributeSinks, clearElementSinks, clearSinks, elementSinks, removeAttributeSink, removeElementSink, removeSink, sendAttributeChangedEvent, sendAttributeChangedEvent, sendEdgeAdded, sendEdgeAdded, sendEdgeRemoved, sendEdgeRemoved, sendGraphCleared, sendGraphCleared, sendNodeAdded, sendNodeAdded, sendNodeRemoved, sendNodeRemoved, sendStepBegins, sendStepBegins

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.graphstream.stream.Source

addAttributeSink, addElementSink, addSink, clearAttributeSinks, clearElementSinks, clearSinks, removeAttributeSink, removeElementSink, removeSink

Constructor Detail

PointsOfInterestGenerator

public PointsOfInterestGenerator()

Method Detail

setParameter

public void setParameter(PointsOfInterestGenerator.Parameter p,
                         Object value)

begin

public void begin()

Add initial count of points of interest, and initial count of people.

See Also:

Generator.begin()

nextEvents

public boolean nextEvents()

Step of the generator. Try to remove a node according to the delPeopleProbability. Try to add a node according to the addPeopleProbability. Try to remove a point of interest according to the delPointOfInterestProbability. Try to add a point of interest according to the addPointOfInterestProbability . Then, step of addicts.

Returns:

true while there are elements to add to the graph.

See Also:

PointsOfInterestGenerator.Addict.step(), Generator.nextEvents()

end

public void end()

Description copied from class: BaseGenerator

End the graph generation by finalizing it. Once the Generator.nextEvents() method returned false (or even if you stop before), this method must be called to finish the graph. In addition, BaseGenerator adds a "clear" operations that removes all the kept edges and nodes identifiers and the associated data.

Specified by:

end in interface Generator

Overrides:

end in class BaseGenerator

main

public static void main(String... args)