Module org.jgrapht.core
Package 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 java.lang.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 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 Description
    java.util.List<java.util.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 Details

    • 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:
      java.lang.IllegalArgumentException - if the graph argument is null.

  • Method Details

    • 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 java.util.List<java.util.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.