final Diagram diagram; // initialization of the Diagram Object.
graphitiEditor.getGraphicalViewer().getControl().addMouseMoveListener(new MouseMoveListener() {
	@Override
	public void mouseMove(MouseEvent e) {
		ILocationInfo info = Graphiti.getPeService().getLocationInfo(diagram, e.x, e.y);
		Shape shape = info.getShape();
		Object bo = Graphiti.getLinkService().getBusinessObjectForLinkedPictogramElement(shape);
	}