[TASK] Add queries that use aggregation functions.

src/main/java/lu/jpt/csparqlproject/SimulationContext.java

@@ -1,6 +1,5 @@
 package lu.jpt.csparqlproject;
 
-import java.text.ParseException;
 import java.util.ArrayList;
 import java.util.Collection;
 
@@ -156,14 +155,16 @@ public class SimulationContext {
 		// Register all the queries and add result observers!
 		Collection<String> queriesToRegister = new ArrayList<String>();
 		queriesToRegister.add(RentACarSimulation.getEventsQuery());
+		queriesToRegister.add(RentACarSimulation.getAverageDataByCar());
 		for(String query : queriesToRegister) {
 			String queryName = CsparqlQueryHelper.getQueryName(query);
 			CsparqlQueryResultProxy resultProxy = null;
 			try {
 				resultProxy = this.engine.registerQuery(query, true);
-			} catch (ParseException e) {
+			} catch (Exception e) {
 				SimulationContext.logger.error(e.toString());
-				SimulationContext.logger.error(e.getStackTrace().toString());
+				SimulationContext.logger.error("Could not register query "+queryName);
+				SimulationContext.logger.error(query);
 			}
 			this.queryResultProxies.add(resultProxy);
 			resultProxy.addObserver(new TextObserverWindow("[ResultProxy] " + queryName));

src/main/java/lu/jpt/csparqlproject/rentacar/Driver.java

@@ -89,7 +89,7 @@ public class Driver {
 	private void useCar(Car car) {
 		Car.CarState carState = car.getState();
 		if(carState == Car.CarState.WRECKED) {
-			// Sad fade :-(
+			// Sad face :-(
 			return;
 		}
 		switch(carState) {

src/main/java/lu/jpt/csparqlproject/rentacar/RentACarSimulation.java

@@ -42,8 +42,8 @@ public class RentACarSimulation implements Runnable {
 	
 	public RentACarSimulation() {
 		this.registerOwnPrefixes();
-		int numberOfCars = 1;
-		int numberOfCustomers = 1;
+		int numberOfCars = 5;
+		int numberOfCustomers = 5;
 		// Create a car pool and drivers
 		this.carPool = new CarPool(numberOfCars);
 		this.drivers = new ArrayList<Driver>();
@@ -188,4 +188,36 @@ public class RentACarSimulation implements Runnable {
 				+ " ?driver car:hasPhoneNumber ?driverPhone . "
 				+ "}";
 	}
+	
+	public static String getSpeedByCar() {
+		return "REGISTER QUERY getSpeedByCar AS "
+				+ "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> "
+				+ "PREFIX f: <http://larkc.eu/csparql/sparql/jena/ext#> "
+				+ "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> "
+				+ "PREFIX car: <"+RentACarSimulation.BASE_ONTOLOGY_IRI+"> "
+				+ "SELECT ?car ?speed "
+				+ "FROM STREAM <"+RentACarSimulation.CAR_STREAM_IRI+"> [RANGE 5s STEP 1s] "
+				+ "WHERE { "
+				+ " ?e rdf:type car:CarStatusEvent . "
+				+ " ?e car:relatedCar ?car . "
+				+ " ?e car:speed ?speed . "
+				+ "}";
+	}
+	
+	public static String getAverageDataByCar() {
+		return "REGISTER QUERY getAverageSpeedByCar AS "
+				+ "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> "
+				+ "PREFIX f: <http://larkc.eu/csparql/sparql/jena/ext#> "
+				+ "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> "
+				+ "PREFIX car: <"+RentACarSimulation.BASE_ONTOLOGY_IRI+"> "
+				+ "SELECT ?car (AVG(?speed) AS ?avgSpeed) (AVG(?rpm) AS ?avgRPM) "
+				+ "FROM STREAM <"+RentACarSimulation.CAR_STREAM_IRI+"> [RANGE 5s STEP 1s] "
+				+ "WHERE { "
+				+ " ?e rdf:type car:CarStatusEvent . "
+				+ " ?e car:relatedCar ?car . "
+				+ " ?e car:motorRPM ?rpm . "
+				+ " ?e car:speed ?speed . "
+				+ "} "
+				+ "GROUP BY (?car) ";
+	}
 }