* @author "Nico Naumann"
*/
private void flush() {
SQLQuery sqlq;
sqlq = this.session.createSQLQuery("truncate modelelements, abstractnodes, circlelocations, connections, edge_node, edgelocations, edges, environmentevents, event_lane, events, lanes, location_edge, locations, nodes, pointsofinterest, polygonlocations, polygonpoints, roadevents, tldurations, trafficlight_edge_tlsl, trafficlights, trafficlightstatelistentries, trafficlightstatelists, way_trafficlight, ways;");
sqlq.executeUpdate();
this.session.clear();
}
/**
* Loads a persisted data model from the associated data base. Before this is done, all