[jgrapht-users] Changes on getEdgeSource(vertex) are not reflected on the graph

[Tobias S. <tob...@gm...>]

Dear *,

I am having an unexplainable problem with the getEdgeSource(vertex) 
method, somehow the changes I make on the received nodes are not 
reflected on the graph, for getEdgeTarget(vertex) on the other hand, 
this works without problems. Do you have any idea why this happens?

         mGraph = (DirectedGraph<Node, DefaultEdge>) 
((AbstractBaseGraph)graph).clone();

         // iterate over every node (i have also tested this with 
various iterators)
         for (Node node : mGraph.vertexSet()) {

                 // iterate over ingoing edges. this loop should only 
run once since we check indegree == 1
                 for (DefaultEdge edge : mGraph.incomingEdgesOf(node)) {
                     Node source = graph.getEdgeSource(edge);
                     source.size++; // this size is not increased later
                 }
         }

I also tried using the EdgeReversedGraph, but there the problem exists 
too (for reversed getEdgeTarget/Source). Moreover I also tried changing 
the nodes after I iterated over the graph

Best Regards
Tobias