Added serialization for RoadNetwork to enable faster startups

src/de/tud/kom/p2psim/impl/topology/movement/vehicular/sumo/simulation/controller/traci/TraciSimulationController.java

 package de.tud.kom.p2psim.impl.topology.movement.vehicular.sumo.simulation.controller.traci;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -14,10 +20,12 @@ import de.tud.kom.p2psim.impl.topology.movement.vehicular.sumo.simulation.contro
 import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetwork;
 import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetworkEdge;
 import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetworkRoute;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.SerializableRoadNetwork;
 import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.exception.NoAdditionalRouteAvailableException;
 import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.exception.NoExitAvailableException;
 import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.routing.BreathFirstSearchRoutingAlgorithm;
 import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.routing.RoutingAlgorithm;
+import de.tudresden.sumo.cmd.Edge;
 import de.tudresden.sumo.cmd.Junction;
 import de.tudresden.sumo.cmd.Lane;
 import de.tudresden.sumo.cmd.Simulation;
@@ -32,6 +40,7 @@ import de.tudresden.ws.container.SumoStringList;
 import it.polito.appeal.traci.SumoTraciConnection;
 
 public class TraciSimulationController implements VehicleController, SimulationSetupExtractor {
+	private static final File TEMP_FILE = new File(new File(System.getProperty("java.io.tmpdir")), "road_network.tmp");
 
 	private static final Map<String, TraciSimulationController> CONTROLLER = new HashMap<>();
 
@@ -526,6 +535,42 @@ public class TraciSimulationController implements VehicleController, SimulationS
 
 	public void obtainRoadNetwork() {
 		if (_roadNetwork == null) {
+			if (TEMP_FILE.exists()) {
+				try {
+					ObjectInputStream inputStream = new ObjectInputStream(new FileInputStream(TEMP_FILE));
+
+					Object readObject = inputStream.readObject();
+
+					if (readObject instanceof SerializableRoadNetwork) {
+						SerializableRoadNetwork serializedRoadNetwork = (SerializableRoadNetwork) readObject;
+						_roadNetwork = new RoadNetwork(serializedRoadNetwork);
+					}
+
+					inputStream.close();
+				} catch (IOException | ClassNotFoundException e) {
+					//Nothing to do
+				}
+			}
+
+			if (_roadNetwork != null) {
+				SumoCommand edgeIDCommand = Edge.getIDList();
+
+				SumoStringList edgeIDStringList = (SumoStringList) requestObject(edgeIDCommand);
+
+				if (_roadNetwork.getAvailableEdges().size() == edgeIDStringList.size()) {
+					boolean matching = true;
+
+					for (String edgeID : edgeIDStringList) {
+						if (_roadNetwork.getEdge(edgeID) == null) {
+							matching = false;
+						}
+					}
+
+					if (matching) {
+						return;
+					}
+				}
+			}
 			SumoCommand laneIDCommand = Lane.getIDList();
 
 			Map<String, RoadNetworkEdge> roadNetwork = new HashMap<>();
@@ -571,6 +616,18 @@ public class TraciSimulationController implements VehicleController, SimulationS
 
 			}
 			_roadNetwork = new RoadNetwork(roadNetwork);
+
+			try {
+				ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream(TEMP_FILE));
+
+				outputStream.writeObject(new SerializableRoadNetwork(_roadNetwork));
+
+				outputStream.flush();
+				outputStream.close();
+			} catch (IOException e) {
+				//Nothing to do
+				e.printStackTrace();
+			}
 		}
 	}
 
@@ -601,7 +658,6 @@ public class TraciSimulationController implements VehicleController, SimulationS
 	public double getVehicleSpeed(String pVehicleID) {
 		SumoCommand speedCommand = Vehicle.getSpeed(pVehicleID);
 		Object object = requestObject(speedCommand);
-		System.out.println(object.getClass());
 
 		return (Double)object;
 	}