Exception when duplicating workspace through GraphModel.pushFrom()

[Sébastien Heymann]

Way to reproduce with the toolkit:

1. Follow http://wiki.gephi.org/index.php/Toolkit_-_Metrics_over_time
2. Add the following code to copy a subgraph into a new workspace:

Graph currentGraphView = dynamicGraph.getSnapshotGraph(subinterval);

final Workspace newWorkspace = pc.newWorkspace(pc.getCurrentProject());
GraphModel gm = Lookup.getDefault().lookup(GraphController.class).getModel(newWorkspace);
gm.pushFrom(currentGraphView);

An exception is raised:

java.lang.IllegalArgumentException: The column doesn't exist
        at org.gephi.data.attributes.AttributeRowImpl.setValue(AttributeRowImpl.java:73)
        at org.gephi.graph.dhns.core.DuplicateManager.duplicateNodeData(DuplicateManager.java:186)
        at org.gephi.graph.dhns.core.DuplicateManager.duplicate(DuplicateManager.java:62)
        at org.gephi.graph.dhns.core.Dhns.pushFrom(Dhns.java:429)
        at org.cnrs.lip6.radarmetrics.Application.execute(Application.java:149)
        at org.cnrs.lip6.radarmetrics.Main.main(Main.java:44)

With the debugger, I found that it occurs with the parameters:
index=2
value=TimeInterval

So basically:
NodeDataImpl.getAttributes() returns a row that is unknown by AttributeTableImpl.getColumn().

[Sébastien Heymann (sebastien.heymann)]

Another code to reproduce the bug, assuming that the CSV file contains an edge list:

//Init a project - and therefore a workspace
ProjectController pc = Lookup.getDefault().lookup(ProjectController.class);
pc.newProject();
Workspace workspace = pc.getCurrentWorkspace();

//Get controllers and models
ImportController importController = Lookup.getDefault().lookup(ImportController.class);

//Import file
Container container;
try {
    File file = new File("1.csv");
    container = importController.importFile(file);
    container.getLoader().setEdgeDefault(EdgeDefault.DIRECTED); //Force DIRECTED
    container.setAllowAutoNode(false); //Don't create missing nodes
} catch (Exception ex) {
    ex.printStackTrace();
    return;
}

//Initialize the DynamicProcessor - which will append the container to the workspace
DynamicProcessor dynamicProcessor = new DynamicProcessor();
dynamicProcessor.setDateMode(false); //Set 'true' if you set real dates (ex: yyyy-mm-dd), it's double otherwise
dynamicProcessor.setLabelmatching(false); //Set 'true' if node matching is done on labels instead of ids

//Set date for this file
dynamicProcessor.setDate("1");

//Process the container using the DynamicProcessor
importController.process(container, dynamicProcessor, workspace);

GraphModel gm = Lookup.getDefault().lookup(GraphController.class).getModel(workspace);

final Workspace newWorkspace = pc.newWorkspace(pc.getCurrentProject());
GraphModel newGm = Lookup.getDefault().lookup(GraphController.class).getModel(newWorkspace);
newGm.pushFrom(gm.getGraph());

[Mathieu Bastian (mathieu.bastian)]

Mainly for modularity reasons, you know that graph and attributes are separated in gephi. You may also know that you can write attribute values only if the column exists; and has therefore been created somehow.

The pushFrom method fails here because the columns haven't been created in the new workspace. Its a pity it doesn't take this classic issue in account and raise a proper exception.

Anyway, do that to duplicate the attribute model in the new workspace:

AttributeModel sourceAttributeModel = attributeController.getModel(currentWorkspace);
AttributeModel destAttributeModel = attributeController.getModel(newWorkspace);
destAttributeModel.mergeModel(sourceAttributeModel);

[Sébastien Heymann (sebastien.heymann)]

Thanks, it solved the issue!