searchRsltTreeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				IStructuredSelection selection = (IStructuredSelection) event.getSelection();
				// set the selection to the service
				selectionService.setSelection(
						//-- return always the first selected element
						selection.getFirstElement());
			}
		});

	public void setSelection(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) Object selObj) {}