@Override protected void writeRootElementAttributes(Switch s, VoltageLevel vl, NetworkXmlWriterContext context) throws XMLStreamException { super.writeRootElementAttributes(s, vl, context); VoltageLevel.NodeBreakerView v = vl.getNodeBreakerView(); context.getWriter().writeAttribute("node1", Integer.toString(v.getNode1(s.getId()))); context.getWriter().writeAttribute("node2", Integer.toString(v.getNode2(s.getId()))); }