[jgrapht-users] No such vertex in Graph error

[Pallavi K. <kar...@gm...>]

Hi,

Have formed a DefaultDirectedGraph like this:
public DirectedGraph<OWLEntity, DefaultEdge> OWLGraph = new
DefaultDirectedGraph<OWLEntity, DefaultEdge>(DefaultEdge.class);

Have added vertices and edges,
Vertex list is printed as follows:
System.out.println(OWLGraph.vertexSet());

The list shows the vertex:
http://www.semanticweb.org/drkm/ontologies/2017/4/
untitled-ontology-82#Disease

Am constructing all directed paths from the graph as follows:
AllDirectedPaths allPathsGraph = new AllDirectedPaths(toGraph.OWLGraph);

Here, OWLGraph is the default directed graph,

Next, i call getAllPaths from source vertex http://www.semanticweb.
org/drkm/ontologies/2017/4/untitled-ontology-82#Food to destination vertex:
http://www.semanticweb.org/drkm/ontologies/2017/4/
untitled-ontology-82#Disease

The stack trace shows the error as:
java.lang.IllegalArgumentException: no such vertex in graph:
http://www.semanticweb.org/drkm/ontologies/2017/4/
untitled-ontology-82#Disease
at org.jgrapht.graph.AbstractGraph.assertVertexExist(AbstractGraph.java:132)
at org.jgrapht.graph.AbstractBaseGraph.incomingEdgesOf(
AbstractBaseGraph.java:365)
at org.jgrapht.alg.AllDirectedPaths.edgeMinDistancesBackwards(
AllDirectedPaths.java:158)
at org.jgrapht.alg.AllDirectedPaths.getAllPaths(AllDirectedPaths.java:105)
at org.jgrapht.alg.AllDirectedPaths.getAllPaths(AllDirectedPaths.java:69)
at com.mycompany.semanticdistance.SemanticDistance.SemanticDistance(
SemanticDistance.java:161)
at com.mycompany.semanticdistance.SemanticDistance.loadOntology(
SemanticDistance.java:136)
at com.mycompany.semanticdistance.SemanticDistance.main(
SemanticDistance.java:84)

May i know how to resolve this?
Kindly help.
Thanks much in advance

-- 
Regs, Pallavi

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