org.jgrapht.experimental

Class UniformRandomGraphGenerator

java.lang.Object

org.jgrapht.experimental.UniformRandomGraphGenerator

All Implemented Interfaces:

GraphGenerator

public class UniformRandomGraphGenerator
extends java.lang.Object
implements GraphGenerator

UniformRandomGraphGenerator generates a uniform random graph of any size. A uniform random graph contains edges chosen independently uniformly at random from the set of all possible edges.

Since:

Sep 13, 2004

Constructor Summary

Constructors

Constructor and Description
UniformRandomGraphGenerator(int numVertices, int numEdges) Construct a new UniformRandomGraphGenerator.

Method Summary

Modifier and Type	Method and Description
void	generateGraph(Graph target, VertexFactory vertexFactory, java.util.Map resultMap) Generate a graph structure.

Methods inherited from class java.lang.Object

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

Constructor Detail

UniformRandomGraphGenerator

public UniformRandomGraphGenerator(int numVertices,
                                   int numEdges)

Construct a new UniformRandomGraphGenerator.

Parameters:

numVertices - number of vertices to be generated

numEdges - number of edges to be generated

Throws:

java.lang.IllegalArgumentException

Method Detail

generateGraph

public void generateGraph(Graph target,
                          VertexFactory vertexFactory,
                          java.util.Map resultMap)

Description copied from interface: GraphGenerator

Generate a graph structure. The topology of the generated graph is dependent on the implementation. For graphs in which not all vertices share the same automorphism equivalence class, the generator may produce a labeling indicating the roles played by generated elements. This is the purpose of the resultMap parameter. For example, a generator for a wheel graph would designate a hub vertex. Role names used as keys in resultMap should be declared as public static final Strings by implementation classes.

Specified by:

generateGraph in interface GraphGenerator

Parameters:

target - receives the generated edges and vertices; if this is non-empty on entry, the result will be a disconnected graph since generated elements will not be connected to existing elements

vertexFactory - called to produce new vertices

resultMap - if non-null, receives implementation-specific mappings from String roles to graph elements (or collections of graph elements)

See Also:

GraphGenerator.generateGraph(org.jgrapht.Graph<V, E>, org.jgrapht.VertexFactory<V>, java.util.Map<java.lang.String, T>)