public void ComputeWithoutRoot_Throws()
{
var graph = new BidirectionalGraph <int, Edge <int> >();
ComputeWithoutRoot_Throws_Test(
() => new HoffmanPavleyRankedShortestPathAlgorithm <int, Edge <int> >(graph, edge => 1.0));
var algorithm = new HoffmanPavleyRankedShortestPathAlgorithm <int, Edge <int> >(graph, edge => 1.0);
Assert.Throws <InvalidOperationException>(algorithm.Compute);
// Source (and target) vertex set but not to a vertex in the graph
const int vertex1 = 1;
algorithm = new HoffmanPavleyRankedShortestPathAlgorithm <int, Edge <int> >(graph, edge => 1.0);
algorithm.SetRootVertex(vertex1);
algorithm.SetTargetVertex(vertex1);
Assert.Throws <VertexNotFoundException>(algorithm.Compute);
const int vertex2 = 2;
graph.AddVertex(vertex1);
algorithm = new HoffmanPavleyRankedShortestPathAlgorithm <int, Edge <int> >(graph, edge => 1.0);
algorithm.SetRootVertex(vertex1);
algorithm.SetTargetVertex(vertex2);
Assert.Throws <VertexNotFoundException>(algorithm.Compute);
}
static void Main(string[] args)
{
//Dictionary to hold all the airports, using dictionary so we can retrieve the value with the string id in flight
Dictionary <String, Airports> airports = new Dictionary <String, Airports>();
//List of all the flights
List <Route> flights = new List <Route>();
//Data for airports
String s =
"OSL,Oslo Gardermoen;BCN, Barcelona El Prat;LGW,London Gatwick;CDG,Paris Charles De Gaulle;ARN,Stockholm Arland;CPH,Copenhagen Kastrup;AGP,Malaga Costa del Sol Airport;AMS,Amsterdam Airport Schipol;FRA,Frankfurt Airport;JFK,New York John F. Kennedy International Airport;LAX,Los Angeles International Airport;FCO,Roma Leonardo da Vinci - Fiumicino Airport;TRD,Trondheim Værnes;BGO,Bergen Flesland;TXL,Berlin Tegel Airport;BKK,Suvarnabhumi Airport;JNB,Johanesburg O. R. Tambo International Airport;BNE,Brisbane Airport;GIG,Rio de Janeiro - Antonio Carlos Jobim International Airport;KEF,Reykjavik Keflavík International Airport";
//Splitting the string and creating airports objects, and putting them into the list
String[] data = s.Split(';');
foreach (string a in data)
{
var airport = new Airports();
String[] b = a.Split(',');
airport.AirportID = b[0];
airport.AirportName = b[1];
airports.Add(b[0], airport);
}
//Flight data
String x = "30.09.2017 09:00:00,30.09.2017 10:40:00,499,OSL,LGW,1;30.09.2017 09:30:00,30.09.2017 12:30:00,599,OSL,BCN,2;30.09.2017 10:00:00,30.09.2017 12:00:00,299,OSL,FRA,3;30.09.2017 07:00:00,30.09.2017 08:00:00,199,OSL,TRD,4;30.09.2017 08:00:00,30.09.2017 09:00:00,199,OSL,BGO,5;30.09.2017 12:00:00,30.09.2017 15:00:00,549,OSL,CDG,6;30.09.2017 10:00:00,30.09.2017 11:00:00,199,BGO,OSL,5;30.09.2017 09:00:00,30.09.2017 10:00:00,149,BGO,TRD,7;30.09.2017 09:00:00,30.09.2017 10:00:00,199,TRD,OSL,4;30.09.2017 11:00:00,30.09.2017 12:00:00,149,TRD,BGO,7;30.09.2017 12:00:00,30.09.2017 13:40:00,499,LGW,OSL,1;30.09.2017 11:00:00,30.09.2017 13:00:00,299,LGW,FRA,8;30.09.2017 13:00:00,30.09.2017 16:00:00,449,LGW,BCN,9;30.09.2017 14:30:00,30.09.2017 17:30:00,599,BCN,OSL,2;30.09.2017 17:00:00,30.09.2017 20:00:00,449,BCN,LGW,9;30.09.2017 19:00:00,30.09.2017 21:00:00,349,BCN,FRA,10;30.09.2017 13:30:00,30.09.2017 15:30:00,299,FRA,OSL,3;30.09.2017 14:30:00,30.09.2017 16:30:00,299,FRA,LGW,8;30.09.2017 23:00:00,01.10.2017 01:00:00,349,FRA,BCN,10;30.09.2017 16:00:00,30.09.2017 19:00:00,549,CDG,OSL,6";
//Splitting the string and creating flight objects and adding them to the list
String[] arrayOfFlights = x.Split(';');
foreach (String a in arrayOfFlights)
{
String[] b = a.Split(',');
var f = new Route();
var source = new Airports();
var target = new Airports();
String[] departureDateTime = b[0].Split(' ');
String[] departureDate = departureDateTime[0].Split('.');
String[] departureTime = departureDateTime[1].Split(':');
String[] arrivalDateTime = b[1].Split(' ');
String[] arrivalDate = arrivalDateTime[0].Split('.');
String[] arrivalTime = arrivalDateTime[1].Split(':');
f.DepartureTime = new DateTime(int.Parse(departureDate[2]), int.Parse(departureDate[1]), int.Parse(departureDate[0]), int.Parse(departureTime[0]), int.Parse(departureTime[1]), int.Parse(departureTime[2]));
f.ArrivalTime = new DateTime(int.Parse(arrivalDate[2]), int.Parse(arrivalDate[1]), int.Parse(arrivalDate[0]), int.Parse(arrivalTime[0]), int.Parse(arrivalTime[1]), int.Parse(arrivalTime[2]));
airports.TryGetValue(b[3], out source);
f.Source = source;
airports.TryGetValue(b[4], out target);
f.Target = target;
flights.Add(f);//Adding to list
}
//Graph where the edges go both ways
var g = new BidirectionalGraph <Airports, Route>();
//Adding airports and routes to graph
foreach (var airport in airports)
{
g.AddVertex(airport.Value);
}
foreach (Route r in flights)
{
g.AddEdge(r);
}
//Func that returns the traveltime of the route arg
Func <Route, double> travelTime = t => (t.ArrivalTime - t.DepartureTime).TotalMinutes;
//Source airport and target
Airports sourceA;
airports.TryGetValue("OSL", out sourceA);
Airports targetA;
airports.TryGetValue("BCN", out targetA);
DateTime start = DateTime.Now;
//Using HoffmanPavleyRankedShortestPath to find the 2 shortest paths
HoffmanPavleyRankedShortestPathAlgorithm <Airports, Route> hoffmanAlgorithm = new HoffmanPavleyRankedShortestPathAlgorithm <Airports, Route>(g, travelTime);
//List to hold all the possible routes
List <IEnumerable <Route> > listOfAvailableFlights = new List <IEnumerable <Route> >();
try
{
//Getting the 5 shortest paths, does not take into account waiting time at the airports
hoffmanAlgorithm.ShortestPathCount = 10;
hoffmanAlgorithm.SetRootVertex(sourceA);
hoffmanAlgorithm.Compute(sourceA, targetA);
//Adding the path to the list if it is viable
foreach (IEnumerable <Route> path in hoffmanAlgorithm.ComputedShortestPaths)
{
Boolean viable = true; //Helper variable
Route p = null; //Helper variable to hold the previous flight
foreach (var e in path)
{
if (p != null)
{
if (e.DepartureTime < p.ArrivalTime.AddMinutes(30))
{
viable = false; //Not adding to list if a flight leaves before the previous one lands + 30 minutes
}
}
p = e;//Setting the helper variable
}
if (viable)
{
listOfAvailableFlights.Add(path); //Adding to list
}
}
}
catch (Exception e) {
Debug.WriteLine(e);
}
Debug.WriteLine((DateTime.Now - start).TotalMilliseconds);
//Traversing the list
foreach (var path in listOfAvailableFlights)
{
//Retrieving the first and last route in the path
Route last = new Route();
last = path.LastOrDefault();
Route first = new Route();
first = path.FirstOrDefault();
double timespan = 0;
//Calculating the total travel time, including downtime at the airports
if (!last.Equals(first))
{
timespan = (last.ArrivalTime - first.DepartureTime).TotalHours;
}
else
{
timespan = (first.ArrivalTime - first.DepartureTime).TotalHours;
}
//Printing the path
foreach (var e in path)
{
Debug.WriteLine(e);
}
//Printing the total waiting time
Debug.WriteLine(timespan);
Debug.WriteLine("--------------------------------");
}
}