Package org.graphstream.algorithm

Class TopologicalSortKahn

java.lang.Object
org.graphstream.algorithm.TopologicalSortKahn
All Implemented Interfaces:
Algorithm
public class TopologicalSortKahn
extends Object
implements Algorithm
Implementation of Kahn's algorithm for a topological sorting of a directed acyclic graph (DAG). Every DAG has at least one topological ordering and this is a algorithm known for constructing a topological ordering in linear time without considering initial copying the graph and searching for source nodes.
Computational Complexity :
O(VxE) time, where V and E are the number of vertices and edges respectively.
Scientific Reference :
Kahn, Arthur B. (1962), "Topological sorting of large networks", Communications of the ACM, 5 (11): 558–562

  • Constructor Details

  • Method Details

    • init

      public void init​(org.graphstream.graph.Graph theGraph)
      Description copied from interface: Algorithm
      Initialization of the algorithm. This method has to be called before the Algorithm.compute() method to initialize or reset the algorithm according to the new given graph.
      Specified by:
      init in interface Algorithm
      Parameters:
      theGraph - The graph this algorithm is using.

    • compute

      public void compute()
      Description copied from interface: Algorithm
      Run the algorithm. The Algorithm.init(Graph) method has to be called before computing.
      Specified by:
      compute in interface Algorithm
      See Also:
      Algorithm.init(Graph)

    • getSortedNodes

      public List<org.graphstream.graph.Node> getSortedNodes()
      gets sorted list of the given graph
      Returns:
      topological sorted list of nodes

    • defaultResult

      public String defaultResult()