[vtkusers] How to retrieve individual value from a vtkTable in Java

[Jean-Max Redonnet]

Hi,

I did a K-Means clustering following the C++ example (
https://lorensen.github.io/VTKExamples/site/Cxx/InfoVis/KMeansClustering/).

        vtkTable kmeansInputData = new vtkTable();
        kmeansInputData.AddColumn(output.GetPointData().GetVectors()); //
output object is a polydata with vectors attached resulting from previous
calculation

        vtkKMeansStatistics kMeansStatistics = new vtkKMeansStatistics();
        kMeansStatistics.SetInputData(kmeansInputData);
        kMeansStatistics.SetColumnStatus(kmeansInputData.GetColumnName(0),
1);
        kMeansStatistics.SetColumnStatus(kmeansInputData.GetColumnName(1),
1);
        kMeansStatistics.SetColumnStatus(kmeansInputData.GetColumnName(2),
1);
        // kMeansStatistics.SetColumnStatus( "Testing", 1 );
        kMeansStatistics.RequestSelectedColumns();
        kMeansStatistics.SetAssessOption(true);
        kMeansStatistics.SetDefaultNumberOfClusters(3);
        kMeansStatistics.Update();

        kMeansStatistics.GetOutput().Dump(32, -1); // dump shows the
clustering is OK

        vtkIntArray clusterArray = new vtkIntArray();
        clusterArray.SetNumberOfComponents(1);
        clusterArray.SetName("ClusterId");

        for(int r = 0; r < kMeansStatistics.GetOutput().GetNumberOfRows();
r++){
         // at this point the C++ instruction to retrieve information is
         // vtkVariant v = kMeansStatistics->GetOutput()->GetValue(r,
kMeansStatistics->GetOutput()->GetNumberOfColumns() - 1);
         // ...
        }

AFAIK vtkVariant does not exists in Java. I tried to get row first using
          vtkAbstractArray a = kMeansStatistics.GetOutput().GetRow(r);
My debugger indicates array a is instance of vtkFloatArray, but java cast
doesn't work, thus I can't retrieve the value
I guess SafeDownCast is the good method to do that, but can't find it in
java wrapper.

So, I can't figure out the right way to retrieve individual value from a
vtkTable in Java.

Any help would be really appreciated

jMax
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