public IGraphEdge GetEdge(int eid)
{
EdgePage page = LoadEdgePage(NetworkObjectSerializer.Page(eid));
if (page == null)
{
return(null);
}
return(page.GetEdge(eid));
}
private EdgePage LoadEdgePage(int page)
{
lock (_thisLock)
{
if (_edgePages.ContainsKey(page))
{
return(_edgePages[page]);
}
if (_dbfactory != null)
{
try
{
using (DbConnection connection = _dbfactory.CreateConnection())
{
connection.ConnectionString = _connectionString;
DbCommand command = _dbfactory.CreateCommand();
command.Connection = connection;
command.CommandText = "SELECT " + _dbNames.DbColName("Data") + " FROM " + _edgeTableName + " WHERE " + _dbNames.DbColName("Page") + "=" + page;
connection.Open();
DbDataReader reader = command.ExecuteReader();
if (reader.Read())
{
object obj = reader.GetValue(0);
connection.Close();
EdgePage newEdgePage =
NetworkObjectSerializer.DeserializeEdges((byte[])obj);
_edgePages.Add(page, newEdgePage);
return(newEdgePage);
}
connection.Close();
}
}
catch { }
}
return(null);
}
}
public static EdgePage DeserializeEdges(byte[] bytes)
{
BinaryReader r = new BinaryReader(new MemoryStream());
r.BaseStream.Write(bytes, 0, (bytes.Length));
r.BaseStream.Position = 0;
EdgePage page = new EdgePage();
while (r.BaseStream.Position < r.BaseStream.Length)
{
int eid = r.ReadInt32();
int fcid = r.ReadInt32(), oid = -1;
if (fcid >= 0)
{
oid = r.ReadInt32();
}
int n1 = r.ReadInt32();
int n2 = r.ReadInt32();
page.Add(eid, fcid, oid, n1, n2);
}
return(page);
}
