How to use

getLayers

method

in

org.apache.taverna.workflowmodel.processor.dispatch.DispatchStack

protected IntermediateProvenance findIntermediateProvenance() {
  for (DispatchLayer<?> layer : getProcessor().getDispatchStack()
      .getLayers())
    if (layer instanceof IntermediateProvenance)
      return (IntermediateProvenance) layer;
  return null;
}

@Test
public void testEdit() throws Exception {
  assertEquals(0,processor.getDispatchStack().getLayers().size());
  defaultDispatchStackEdit.doEdit();
  assertTrue(processor.getDispatchStack().getLayers().size()>0);
}

@Test
public void testUndo() throws Exception {
  defaultDispatchStackEdit.doEdit();
  assertTrue(processor.getDispatchStack().getLayers().size()>0);		
}

private void addProvenanceLayerToProcessors(WorkflowProvenanceItem workflowItem) {
  // TODO Shouldn't we use a bean for this? 
  Edits edits = new EditsImpl();
  for (Processor processor : dataflow.getProcessors())
    /*
     * Synchronized per processor as we might be modifying its dispatch
     * stack (fixes T3-929)
     */
    synchronized (processor) {               
      DispatchStack dispatchStack = processor.getDispatchStack();
      List<DispatchLayer<?>> layers = dispatchStack.getLayers();
      if (isProvenanceAlreadyAdded(layers))
        continue;
      IntermediateProvenance provenance = new IntermediateProvenance();
      provenance.setWorkflow(workflowItem);
      provenance.setReporter(context.getProvenanceReporter());
      try {
        edits.getAddDispatchLayerEdit(dispatchStack, provenance,
            provenancePosition(layers)).doEdit();
        break;
      } catch (EditException e) {
        logger.warn("adding provenance layer to dispatch stack failed "
                + e.toString());
      }
    }
}