Add Singular Route Adding Function

src/main/java/seng202/group9/Core/Airport.java

@@ -309,10 +309,10 @@ public class Airport {
 			throw new DataException("Airport Name already Exists, Please Choose Another.");
 		}
 		if (!airport.getIATA_FFA().equals("") && airport.getIATA_FFA().equals(this.name)){
-			throw new DataException("Airport Name already Exists, Please Choose Another.");
+			throw new DataException("Airport IATA/FFA already Exists, Please Choose Another.");
 		}
 		if (!airport.getICAO().equals("") && airport.getICAO().equals(this.name)){
-			throw new DataException("Airport Name already Exists, Please Choose Another.");
+			throw new DataException("Airport ICAO already Exists, Please Choose Another.");
 		}
 	}
 	/**

src/main/java/seng202/group9/Core/Route.java

@@ -158,7 +158,18 @@ public class Route {
 	public String arrivesAt(){
 		return arrivalAirport;
 	}
-	
+
+	/**
+	 * Checks is passed route is a duplicate of the current one if so it throws an DataException
+	 */
+	public void hasDuplicate(Route route) throws DataException{
+		//routeAirline + routeSourceAirport + routeArrvAirport + routeCodeShare + routeStops + routeEquip
+		if (route.getAirline().equals(this.airline) && route.departsFrom().equals(this.departureAirport)
+				&& route.arrivesAt().equals(this.arrivalAirport) && route.getCode().equals(this.codeShare)
+				 && route.getStops() == this.stops && route.getEquipment().equals(this.equipment)){
+			throw new DataException("This Route already exists.");
+		}
+	}
 	@Override
 	public String toString(){