salvo.jesus.graph

Interface GraphFactory

All Superinterfaces:

Serializable

All Known Implementing Classes:

DirectedAcyclicGraphImplFactory, DirectedGraphImplFactory, GraphImplFactory, TreeImplFactory, WeightedGraphImplFactory

public interface GraphFactory
extends Serializable

This interface defines a factory for creting Vertices and Edges in a Graph. By default, each of the following classes that implement the Graph interface uses a different GraphFactory as shown below:

Class implementing the Graph interface	Corresponding class implementing the GraphFactory interface
GraphImpl	GraphImplFactory
DirectedGraphImpl	DirectedGraphImplFactory
DirectedAcylicGraphImpl	DirectedAcylicGraphImplFactory
WeightedGraphImpl	WeightedGraphImplFactory
TreeImpl	TreeImplFactory
BinaryTreeImpl	TreeImplFactory

If you only want to replace the Vertex class being created from the factory, the easiest way is to extend the GraphFactory class for the corresponding Graph class that you are providing a factory for and just override the createVertex() method without overriding the createEdge() method.

Otherwise, you must ensure that the Edge being created via the createEdge() method is of the proper type as expected by the corresponding Graph class.

Implementation of this interface must also have a noarg constructor, in order for it to be properly serialized and deserialized from XML.

Author:

Jesus M. Salvo Jr.

Method Summary

Modifier and Type	Method and Description
Edge	createEdge(Vertex v1, Vertex v2) Factory method to create an Edge.
Vertex	createVertex() Factory method to create a Vertex.

Method Detail

createVertex

Vertex createVertex()

Factory method to create a Vertex.

Internally within OpenJGraph, this method is used in the following:

• GraphPanelVertexState so that this method is called whenever a user interactively adds a Vertex to the Graph.
• XGMMLContentHandler when recreating the Graph from an XML file.

createEdge

Edge createEdge(Vertex v1,
                Vertex v2)

Factory method to create an Edge. All previous calls to Graph.createEdge() will be expected to be replace by calling this method instead.

Internally within OpenJGraph, as of 0.9.0, this method is called in GraphImpl.addEdge( Vertex, Vertex ).