Class RandomGraphGenerator<V,E>

java.lang.Object
org.jgrapht.generate.RandomGraphGenerator<V,E>
All Implemented Interfaces:
GraphGenerator<V,E,V>

public class RandomGraphGenerator<V,E> extends Object implements GraphGenerator<V,E,V>
This Generator creates a random-topology graph of a specified number of vertexes and edges. An instance of this generator will always return the same graph-topology in calls to generateGraph(). The vertexes can be different (depends on the VertexFactory implementation)

However, two instances which use the same constructor parameters will produce two different random graphs (note: as with any random generator, there is always a small possibility that two instances will create the same results).

Since:
Aug 6, 2005
Author:
Assaf Lehr
  • Field Details

    • numOfVertexes

      protected int numOfVertexes
    • numOfEdges

      protected int numOfEdges
    • randomizer

      protected Random randomizer
  • Constructor Details

    • RandomGraphGenerator

      public RandomGraphGenerator(int aNumOfVertexes, int aNumOfEdges)
  • Method Details

    • generateGraph

      public void generateGraph(Graph<V,E> target, VertexFactory<V> vertexFactory, Map<String,V> resultMap)
      (non-Javadoc)
      Specified by:
      generateGraph in interface GraphGenerator<V,E,V>
      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)
      Throws:
      IllegalArgumentException - if the aNumOfEdges passed in the constructor, cannot be created on a graph of the concrete type with aNumOfVertexes. org.jgrapht.generate.RandomGraphGenerator.DefaultEdgeTopologyFactory#isNumberOfEdgesValid(org.jgrapht.Graph, int)
      See Also: