org.jgrapht.alg.cycle

Class SzwarcfiterLauerSimpleCycles<V,E>

java.lang.Object

org.jgrapht.alg.cycle.SzwarcfiterLauerSimpleCycles<V,E>

Type Parameters:

V - the vertex type.

E - the edge type.

All Implemented Interfaces:

DirectedSimpleCycles<V,E>

public class SzwarcfiterLauerSimpleCycles<V,E>
extends Object
implements DirectedSimpleCycles<V,E>

Find all simple cycles of a directed graph using the Schwarcfiter and Lauer's algorithm.

See:
J.L.Szwarcfiter and P.E.Lauer, Finding the elementary cycles of a directed graph in $O(n + m)$ per cycle, Technical Report Series, #60, May 1974, Univ. of Newcastle upon Tyne, Newcastle upon Tyne, England.

Author:

Nikolay Ognyanov

Constructor Summary

Constructors

Constructor and Description
SzwarcfiterLauerSimpleCycles() Create a simple cycle finder with an unspecified graph.
SzwarcfiterLauerSimpleCycles(Graph<V,E> graph) Create a simple cycle finder for the specified graph.

Method Summary

Modifier and Type	Method and Description
List<List<V>>	findSimpleCycles() Find the simple cycles of the graph.
Graph<V,E>	getGraph() Get the graph
void	setGraph(Graph<V,E> graph) Set the graph

Methods inherited from class java.lang.Object

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

Constructor Detail

SzwarcfiterLauerSimpleCycles

public SzwarcfiterLauerSimpleCycles()

Create a simple cycle finder with an unspecified graph.

SzwarcfiterLauerSimpleCycles

public SzwarcfiterLauerSimpleCycles(Graph<V,E> graph)

Create a simple cycle finder for the specified graph.

Parameters:

graph - - the DirectedGraph in which to find cycles.

Throws:

IllegalArgumentException - if the graph argument is null.

Method Detail

getGraph

public Graph<V,E> getGraph()

Get the graph

Returns:

graph

setGraph

public void setGraph(Graph<V,E> graph)

Set the graph

Parameters:

graph - graph

findSimpleCycles

public List<List<V>> findSimpleCycles()

Find the simple cycles of the graph.

Specified by:

findSimpleCycles in interface DirectedSimpleCycles<V,E>

Returns:

The list of all simple cycles. Possibly empty but never null.