public class GenerateDesReportHandler extends AbstractHandler {

    private static final String TEMPLATE_URL = "platform:/plugin/.../templates/Report.xlsx"; //$NON-NLS-1$

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        try {
            DialectEditor editor = (DialectEditor) HandlerUtil.getActiveEditor(event);
            DSemanticDecorator repr = (DSemanticDecorator) editor.getRepresentation();
            DiscreteEventSimulation analysis = (DiscreteEventSimulation) repr.getTarget();

            URI targetFolderUri = analysis.eResource().getURI().trimSegments(1);
            IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
            IContainer targetFolder = targetFolderUri.segmentCount() > 2
                    ? root.getFolder(new Path(targetFolderUri.toPlatformString(true)))
                    : root.getProject(targetFolderUri.lastSegment());

            GenerateGendocReportOperation operation = new GenerateGendocReportOperation(
                    new URL(TEMPLATE_URL),
                    analysis, analysis.getName(), targetFolder);
            IProgressService service = HandlerUtil.getActiveWorkbenchWindow(event).getWorkbench().getProgressService();
            service.run(false, true, new IRunnableWithProgress() {

                @Override
                public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
                    operation.run(monitor);
                    IWorkbenchWindow activeWindow = HandlerUtil.getActiveWorkbenchWindow(event);
                    IWorkbenchPage activePage = activeWindow.getActivePage();
                    IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
                    IFile targetFile = root.getFileForLocation(new Path(operation.getTargetFileName()));
                    try {
                        IDE.openEditor(activePage, targetFile);
                    } catch (PartInitException e) {
                        throw new InvocationTargetException(e);
                    }
                }

            });
        } catch (RuntimeException | MalformedURLException | InterruptedException e) {
            String message = e.getLocalizedMessage();
            if (message == null || message.isEmpty()) {
                message = Messages.CalcluateDesResultsHandler_Error;
            }
            Shell shell = HandlerUtil.getActiveShell(event);
            MessageDialog.openError(shell, Messages.CalcluateDesResultsHandler_Error, message);
        } catch (InvocationTargetException e) {
            String message = e.getCause() != null ? e.getCause().getLocalizedMessage() : e.getLocalizedMessage();
            if (message == null || message.isEmpty()) {
                message = Messages.CalcluateDesResultsHandler_Error;
            }
            Shell shell = HandlerUtil.getActiveShell(event);
            MessageDialog.openError(shell, Messages.CalcluateDesResultsHandler_Error, message);
        }
        return null;
    }

}