public void DeleteLocationVertices()
{
using (SessionNoServer session = new SessionNoServer(systemDir, 5000, false, true))
{
session.BeginUpdate();
Graph g = Graph.Open(session); // it takes a while to open graph fresh from databases
if (g != null)
{
VertexType userType = g.FindVertexType("User");
VertexType locationType = g.FindVertexType("Location");
EdgeType friendEdgeType = g.FindEdgeType("Friend");
EdgeType userLocationEdgeType = g.FindEdgeType("UserLocation");
for (int i = 1; i < numberOfLocationVertices; i++)
{
locationType.RemoveVertex(new Vertex(g, locationType, i));
}
Assert.IsTrue(userLocationEdgeType.CountEdges() == 0);
Assert.IsTrue(userType.GetEdges(userLocationEdgeType, Direction.Out).Count() == 0);
session.Commit();
Validate();
}
}
}
/// <summary>
/// Selects all edges from or to this vertex and for the given edge type.
/// </summary>
/// <param name="edgeType">the id of an EdgeType</param>
/// <param name="dir">direction, one of: Out, In, Both</param>
/// <returns>a set of Edge</returns>
public IEnumerable <IEdge> GetEdges(EdgeType edgeType, Direction dir)
{
return(m_vertexType.GetEdges(edgeType, this, dir));
}
/// <summary>
/// Enumerates all the edges of the given type between two given nodes (tail and head).
/// </summary>
/// <param name="etype">Type of Edge</param>
/// <param name="tail">Outgoing Vertex</param>
/// <param name="head">Incoming Vertex</param>
/// <returns>Enumeration of Edge</returns>
public IEnumerable <IEdge> Edges(EdgeType etype, Vertex tail, Vertex head)
{
VertexType vertexType = tail.VertexType;
return(vertexType.GetEdges(etype, tail, Direction.Out, head));
}