/// <summary>Serializes a graph into a file</summary>
/// <param name="g">Graph to serialize</param>
/// <param name="file">Target file</param>
public static void Serialize(Graph g, string file)
{
using (XmlTextWriter writer = new XmlTextWriter(file, Encoding.UTF8))
{
writer.Formatting = Formatting.Indented;
writer.Indentation = 1;
writer.IndentChar = '\t';
writer.WriteStartDocument(true);
writer.WriteStartElement("GraphXML");
writer.WriteStartElement("graph");
writer.WriteAttributeString("id", "autogenerated_webgraph_10");
writer.WriteAttributeString("meta", g.Tag.ToString());
g.ForAllNodes(node =>
{
writer.WriteStartElement("node");
writer.WriteAttributeString("name", string.Format("n{0:D4}", node.Id));
writer.WriteElementString("label", node.Label);
writer.WriteEndElement(); // node
});
g.ForAllEdges(edge =>
{
writer.WriteStartElement("edge");
writer.WriteAttributeString("source", string.Format("n{0:D4}", edge.From.Id));
writer.WriteAttributeString("target", string.Format("n{0:D4}", edge.To.Id));
writer.WriteEndElement(); // edge
});
writer.WriteEndElement(); // graph
writer.WriteEndElement(); // GraphXML
writer.Close();
}
}
/// <summary>
///
/// </summary>
/// <param name="file"></param>
/// <returns></returns>
public static Graph Deserialize(string file)
{
XmlDocument doc = new XmlDocument();
doc.Load(file);
Graph result = new Graph();
result.Tag = doc.SelectSingleNode("/GraphXML/graph").Attributes["meta"].Value;
foreach (XmlNode node in doc.SelectNodes("/GraphXML/graph/node"))
{
Node n = result.AddNode(node.SelectSingleNode("label").InnerText);
n.Id = Convert.ToInt32(node.Attributes["name"].Value.Substring(1));
}
foreach (XmlNode edge in doc.SelectNodes("/GraphXML/graph/edge"))
{
int id1 = Convert.ToInt32(edge.Attributes["source"].Value.Substring(1));
int id2 = Convert.ToInt32(edge.Attributes["target"].Value.Substring(1));
result.AddEdge(result.FindNode(id1), result.FindNode(id2));
}
return result;
}
/// <summary>Initialization ctor </summary>
/// <param name="g">Graph to layout</param>
/// <param name="dRigidity">Initial layout speed</param>
public GraphLayouter(Graph g, double dRigidity = 0.25)
{
graph = g;
damping = true;
rigidity = dRigidity;
}