Package org.geotools.graph.util.graph

Class GraphPartitioner

Object

GraphPartitioner

All Implemented Interfaces:

GraphWalker

public class GraphPartitioner
extends Object
implements GraphWalker

Creates a collection of connected graphs from a single graph. A connected graph in which for every two pair of nodes, there is a path between them.

Author:

Justin Deoliveira, Refractions Research Inc, jdeolive@refractions.net

Constructor Summary

Constructors

Constructor	Description
GraphPartitioner(Graph graph)	Constructs a new partitioner for a graph.

Method Summary

Modifier and Type	Method	Description
void	finish()	Adds the current partition to the completed set of partitions and creates a new partition.
ArrayList<Serializable>	getPartitions()	Returns the partitions of the graph.
boolean	partition()	Performs the partition.
int	visit(Graphable element, GraphTraversal traversal)	Adds the element to the current partition.

Methods inherited from class Object

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

Constructor Details

GraphPartitioner

public GraphPartitioner(Graph graph)

Constructs a new partitioner for a graph.

Parameters:

graph - Graph to be partitioned.

Method Details

partition

public boolean partition()

Performs the partition.

Returns:

True if the partition was successful, otherwise false.

getPartitions

public ArrayList<Serializable> getPartitions()

Returns the partitions of the graph.

Returns:

A collection of Graph objects.

See Also:

• Graph

visit

public int visit(Graphable element,
 GraphTraversal traversal)

Adds the element to the current partition.

Specified by:

visit in interface GraphWalker

Parameters:

element - The component being visited.

traversal - The traversal controlling the sequence of graph component visits.

Returns:

GraphTraversal#CONTINUE to signal that the traversal should continue.
GraphTraversal#CONTINUE to signal that the traversal should suspend.
GraphTraversal#KILL_BRANCH to signal that the traversal should kill its current branch.
GraphTraversal#STOP to signal that the traversal should stop.

See Also:

• GraphWalker.visit(Graphable, GraphTraversal)

finish

public void finish()

Adds the current partition to the completed set of partitions and creates a new partition.

Specified by:

finish in interface GraphWalker

See Also:

• GraphWalker.finish()