/// <summary>
/// Deserializes from the given stream.
/// </summary>
public static MultimodalDb Deserialize(Stream stream)
{
if (stream.ReadByte() != 1)
{
throw new Exception("Cannot deserialize db, version # doesn't match.");
}
// deserialize router db.
var routerDb = RouterDb.Deserialize(stream);
// read transit db.
var transitDb = TransitDb.Deserialize(stream);
// create db.
var db = new MultimodalDb(routerDb, transitDb);
// read stop links db count.
var stopLinksDbCount = stream.ReadByte();
for (var i = 0; i < stopLinksDbCount; i++)
{
db.AddStopLinksDb(StopLinksDb.Deserialize(stream));
}
return(db);
}
/// <summary>
/// Adds a stop links db.
/// </summary>
public void AddStopLinksDb(StopLinksDb db)
{
if (db == null)
{
throw new ArgumentNullException("db");
}
if (db.Guid != _routerDb.Guid)
{
throw new Exception("Cannot add this stop links db. It was built based on a different network.");
}
_stoplinksDbs[db.ProfileName] = db;
}
/// <summary>
/// Adds a new stop links db for the given profile.
/// </summary>
public static void AddStopLinksDb(this MultimodalDb db, Profile profile, float searchOffset = DefaultSearchOffset,
float maxDistance = DefaultMaxDistance, int maxRouterPoints = DefaultMaxRouterPoints)
{
var stopsDbEnumerator = db.TransitDb.GetStopsEnumerator();
var linksDb = new StopLinksDb(stopsDbEnumerator.Count, db.RouterDb, profile);
while (stopsDbEnumerator.MoveNext())
{
var stopId = stopsDbEnumerator.Id;
var multiResolver = new ResolveMultipleAlgorithm(db.RouterDb.Network.GeometricGraph,
stopsDbEnumerator.Latitude, stopsDbEnumerator.Longitude, searchOffset, maxDistance, (edge) =>
{
// get profile.
float distance;
ushort edgeProfileId;
Itinero.Data.Edges.EdgeDataSerializer.Deserialize(edge.Data[0],
out distance, out edgeProfileId);
var edgeProfile = db.RouterDb.EdgeProfiles.Get(edgeProfileId);
// get factor from profile.
if (profile.Factor(edgeProfile).Value <= 0)
{ // cannot be traversed by this profile.
return(false);
}
// verify stoppable.
if (!profile.CanStopOn(edgeProfile))
{ // this profile cannot stop on this edge.
return(false);
}
return(true);
});
multiResolver.Run();
if (multiResolver.HasSucceeded)
{
// get the n-closest.
var closest = multiResolver.Results.GetLowestN(maxRouterPoints,
(p) => Coordinate.DistanceEstimateInMeter(stopsDbEnumerator.Latitude, stopsDbEnumerator.Longitude,
p.Latitude, p.Longitude));
// add them as new links.
for (var i = 0; i < closest.Count; i++)
{
linksDb.Add((uint)stopId, closest[i]);
}
}
}
db.AddStopLinksDb(linksDb);
}
internal Enumerator(StopLinksDb db)
{
_db = db;
}
