public double GetEdgeWeight(Guid guid, int eid)
{
int pageIndex = NetworkObjectSerializer.Page(eid);
IWeightPage page = LoadWeightPage(guid, pageIndex);
if (page == null)
{
return(0.0);
}
// Page 0: Edge 1...512: weightIndex: 0..511 auf Page 1
// Page 1: Edge 512..1024: weightIndex: 0..511 auf Page 2
// ... ....
// Beispiele:
// 0-> weightIndex=( 1-1)-0*512=0
// 512-> weightIndex=( 512-1)-0*512=511
// 513-> weightIndex=( 513-1)-1*512=0
// 1024-> weightIndex=(1024-1)-1*512=511
// ...
int weightIndex = (eid - 1) - pageIndex * NetworkObjectSerializer.PageSize;
return(page.GetWeight(weightIndex));
}
public NetworkNodeType GetNodeType(int nodeId)
{
NodeTypesPage page = LoadNodeTypePage(NetworkObjectSerializer.Page(nodeId));
if (page == null)
{
return(NetworkNodeType.Unknown);
}
return(page.GetNodeType(nodeId));
}
public int GetNodeFcid(int nodeId)
{
NodeFcIdsPage page = LoadNodeFcIdPage(NetworkObjectSerializer.Page(nodeId));
if (page == null)
{
return(-1);
}
return(page.GetNodeFcId(nodeId));
}
public bool GetSwitchState(int nodeId)
{
SwitchPage page = LoadSwitchPage(NetworkObjectSerializer.Page(nodeId));
if (page == null)
{
return(false);
}
return(page.GetSwitchState(nodeId));
}
public IGraphEdge GetEdge(int eid)
{
EdgePage page = LoadEdgePage(NetworkObjectSerializer.Page(eid));
if (page == null)
{
return(null);
}
return(page.GetEdge(eid));
}
public GraphTableRows QueryN1(int n1)
{
GraphPage page = LoadGraphPage(NetworkObjectSerializer.Page(n1));
if (page == null)
{
return(new GraphTableRows());
}
return(page.QueryN1(n1));
}
public byte[] Serialize()
{
BinaryWriter writer = new BinaryWriter(new MemoryStream());
writer.Write(_version);
writer.Write(_complexEdges);
writer.Write(_isSwitch);
NetworkObjectSerializer.SerializeString(writer, _switchFieldname);
byte[] bytes = new byte[writer.BaseStream.Length];
writer.BaseStream.Position = 0;
writer.BaseStream.Read(bytes, (int)0, (int)writer.BaseStream.Length);
writer.Close();
return(bytes);
}
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 bool Deserialize(byte[] bytes)
{
try
{
BinaryReader r = new BinaryReader(new MemoryStream());
r.BaseStream.Write(bytes, 0, (bytes.Length));
r.BaseStream.Position = 0;
_version = r.ReadInt32();
if (_version >= 1)
{
_complexEdges = r.ReadBoolean();
}
if (_version >= 2)
{
_isSwitch = r.ReadBoolean();
_switchFieldname = NetworkObjectSerializer.DeserializeString(r);
}
return(true);
}
catch { return(false); }
}
