org.jgrapht.generate

Class EmptyGraphGenerator<V,E>

java.lang.Object

org.jgrapht.generate.EmptyGraphGenerator<V,E>

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Implemented Interfaces:

GraphGenerator<V,E,V>

public class EmptyGraphGenerator<V,E>
extends Object
implements GraphGenerator<V,E,V>

Generates an empty graph of any size. An empty graph is a graph that has no edges.

Author:

John V. Sichi

Constructor Summary

Constructors

Constructor and Description
EmptyGraphGenerator(int size) Construct a new EmptyGraphGenerator.

Method Summary

Modifier and Type	Method and Description
void	generateGraph(Graph<V,E> target, Map<String,V> resultMap) Generate a graph structure.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jgrapht.generate.GraphGenerator

generateGraph

Constructor Detail

EmptyGraphGenerator

public EmptyGraphGenerator(int size)

Construct a new EmptyGraphGenerator.

Parameters:

size - number of vertices to be generated

Throws:

IllegalArgumentException - if the specified size is negative.

Method Detail

generateGraph

public void generateGraph(Graph<V,E> target,
                          Map<String,V> resultMap)

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<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

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