/// <summary>
/// Gets the frontier elements on an outgoing edge
/// </summary>
/// <param name="vertex">The vertex behind the frontier</param>
/// <param name="edgepropertyFilter">The edge property filter</param>
/// <param name="edgeFilter">The edge filter</param>
/// <param name="vertexFilter">The vertex filter</param>
/// <param name="alreadyVisited">The vertices that have been visited already</param>
/// <returns>A number of frontier elements</returns>
private static IEnumerable<FrontierElement> GetValidOutgoingEdges(
VertexModel vertex,
PathDelegates.EdgePropertyFilter edgepropertyFilter,
PathDelegates.EdgeFilter edgeFilter,
PathDelegates.VertexFilter vertexFilter,
BigBitArray alreadyVisited)
{
var edgeProperties = vertex.GetOutgoingEdges();
var result = new List<FrontierElement>();
if (edgeProperties != null)
{
foreach (var edgeContainer in edgeProperties)
{
if (edgepropertyFilter != null && !edgepropertyFilter(edgeContainer.EdgePropertyId, Direction.OutgoingEdge))
{
continue;
}
if (edgeFilter != null)
{
for (var i = 0; i < edgeContainer.Edges.Count; i++)
{
var aEdge = edgeContainer.Edges[i];
if (edgeFilter(aEdge, Direction.OutgoingEdge))
{
if (alreadyVisited.SetValue(aEdge.TargetVertex.Id, true))
{
if (vertexFilter != null)
{
if (vertexFilter(aEdge.TargetVertex))
{
result.Add(new FrontierElement
{
EdgeDirection = Direction.OutgoingEdge,
EdgeLocation = new EdgeLocation
{
Edge = aEdge,
EdgePropertyId =
edgeContainer.EdgePropertyId
},
FrontierVertex = aEdge.TargetVertex
});
}
}
else
{
result.Add(new FrontierElement
{
EdgeDirection = Direction.OutgoingEdge,
EdgeLocation = new EdgeLocation
{
Edge = aEdge,
EdgePropertyId =
edgeContainer.EdgePropertyId
},
FrontierVertex = aEdge.TargetVertex
});
}
}
}
}
}
else
{
if (vertexFilter != null)
{
for (var i = 0; i < edgeContainer.Edges.Count; i++)
{
var aEdge = edgeContainer.Edges[i];
if (alreadyVisited.SetValue(aEdge.TargetVertex.Id, true))
{
if (vertexFilter(aEdge.TargetVertex))
{
result.Add(new FrontierElement
{
EdgeDirection = Direction.OutgoingEdge,
EdgeLocation = new EdgeLocation
{
Edge = aEdge,
EdgePropertyId =
edgeContainer.EdgePropertyId
},
FrontierVertex = aEdge.TargetVertex
});
}
}
}
}
else
{
for (var i = 0; i < edgeContainer.Edges.Count; i++)
{
var aEdge = edgeContainer.Edges[i];
if (alreadyVisited.SetValue(aEdge.TargetVertex.Id, true))
{
result.Add(new FrontierElement
{
EdgeDirection = Direction.OutgoingEdge,
EdgeLocation = new EdgeLocation
{
Edge = aEdge,
EdgePropertyId =
edgeContainer.EdgePropertyId
},
FrontierVertex = aEdge.TargetVertex
});
}
}
}
}
}
}
return result;
}
/// <summary>
/// Get the valid edges of a vertex
/// </summary>
/// <param name="vertex">The vertex.</param>
/// <param name="direction">The direction.</param>
/// <param name="edgepropertyFilter">The edge property filter.</param>
/// <param name="edgeFilter">The edge filter.</param>
/// <param name="vertexFilter">The target vertex filter.</param>
/// <returns>Valid edges</returns>
public static List<Tuple<UInt16, IEnumerable<EdgeModel>>> GetValidEdges(
VertexModel vertex,
Direction direction,
PathDelegates.EdgePropertyFilter edgepropertyFilter,
PathDelegates.EdgeFilter edgeFilter,
PathDelegates.VertexFilter vertexFilter)
{
var edgeProperties = direction == Direction.IncomingEdge ? vertex.GetIncomingEdges() : vertex.GetOutgoingEdges();
var result = new List<Tuple<ushort, IEnumerable<EdgeModel>>>();
if (edgeProperties != null)
{
foreach (var edgeContainer in edgeProperties)
{
if (edgepropertyFilter != null && !edgepropertyFilter(edgeContainer.EdgePropertyId, direction))
{
continue;
}
if (edgeFilter != null)
{
var validEdges = new List<EdgeModel>();
for (var i = 0; i < edgeContainer.Edges.Count; i++)
{
var aEdge = edgeContainer.Edges[i];
if (edgeFilter(aEdge, direction))
{
if (vertexFilter != null)
{
if (
vertexFilter(direction == Direction.IncomingEdge
? aEdge.SourceVertex
: aEdge.TargetVertex))
{
validEdges.Add(aEdge);
}
}
else
{
validEdges.Add(aEdge);
}
}
}
result.Add(new Tuple<ushort, IEnumerable<EdgeModel>>(edgeContainer.EdgePropertyId, validEdges));
}
else
{
if (vertexFilter != null)
{
var validEdges = new List<EdgeModel>();
for (var i = 0; i < edgeContainer.Edges.Count; i++)
{
var aEdge = edgeContainer.Edges[i];
if (
vertexFilter(direction == Direction.IncomingEdge
? aEdge.SourceVertex
: aEdge.TargetVertex))
{
validEdges.Add(aEdge);
}
}
result.Add(new Tuple<ushort, IEnumerable<EdgeModel>>(edgeContainer.EdgePropertyId, validEdges));
}
else
{
result.Add(new Tuple<ushort, IEnumerable<EdgeModel>>(edgeContainer.EdgePropertyId, edgeContainer.Edges));
}
}
}
}
return result;
}
