private static string WriteLiteralNode(ILiteralNode literalnode, Triple t, BaseWriterContext context, bool collapseLiterals)
{
// Example output:
// "h" [label = "v", shape = box];
// where h is the hash of the triple containing the literal node
// and v is value of literal node
// Literal nodes are identified either by their value or by their containing triple.
// When identified by value, there will be a single node representing all literals with the same value.
// When identified by triple, there will be a separate node representing each triple that has an object with that value.
var idObject = collapseLiterals ? literalnode as object : t as object;
var nodeId = idObject.GetHashCode().ToString();
GraphVizWriter.Prettify(DOT.Tab, context);
GraphVizWriter.WriteQuoted(nodeId, context);
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.OpenSquare);
context.Output.Write(DOT.Label);
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.Equal);
GraphVizWriter.Prettify(DOT.Space, context);
GraphVizWriter.WriteLiteralNodeLabel(literalnode, context);
context.Output.Write(DOT.Comma);
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.Shape);
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.Equal);
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.Box);
context.Output.Write(DOT.CloseSquare);
context.Output.Write(DOT.NewLine, context);
return(nodeId);
}
private static void WriteTriple(Triple triple, BaseWriterContext context, bool collapseLiterals)
{
// Output Node lines for Literal Node so we show them as Boxes
// This is in keeping with Standard Graph representation of RDF
// Literals are shown in Boxes, Uri Nodes in ellipses (GraphViz's default shape)
var subjectId = GraphVizWriter.ProcessNode(triple, TripleSegment.Subject, context, collapseLiterals);
var objectId = GraphVizWriter.ProcessNode(triple, TripleSegment.Object, context, collapseLiterals);
// Output the actual lines that state the relationship between the Nodes
// We use the Predicate as the Label on the relationship
var predicateLabel = GraphVizWriter.ReduceToQName((triple.Predicate as IUriNode).Uri, context);
GraphVizWriter.Prettify(DOT.Tab, context);
GraphVizWriter.WriteQuoted(subjectId, context);
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.Arrow);
GraphVizWriter.Prettify(DOT.Space, context);
GraphVizWriter.WriteQuoted(objectId, context);
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.OpenSquare);
context.Output.Write(DOT.Label);
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.Equal);
GraphVizWriter.Prettify(DOT.Space, context);
GraphVizWriter.WriteQuoted(predicateLabel, context);
context.Output.Write(DOT.CloseSquare);
context.Output.Write(DOT.Semicolon);
GraphVizWriter.Prettify(DOT.NewLine, context);
}
/// <summary>
/// Saves a Graph into GraphViz DOT Format
/// </summary>
/// <param name="g">Graph to save</param>
/// <param name="output">Stream to save to</param>
protected override void SaveInternal(IGraph g, TextWriter output)
{
var context = new BaseWriterContext(g, output)
{
PrettyPrint = this.PrettyPrintMode
};
GraphVizWriter.WriteGraph(context, this.CollapseLiterals);
}
/// <summary>
/// Generates GraphViz Output for the given Graph.
/// </summary>
/// <param name="g">Graph to generated GraphViz Output for.</param>
/// <param name="filename">File you wish to save the Output to.</param>
/// <param name="open">Whether you want to open the Output in the default application (according to OS settings) for the filetype after it is Created.</param>
public void Generate(IGraph g, String filename, bool open)
{
// Prepare the Process
ProcessStartInfo start = new ProcessStartInfo();
if (!_graphvizdir.Equals(String.Empty))
{
start.FileName = _graphvizdir + "dot.exe";
}
else
{
start.FileName = "dot.exe";
}
start.Arguments = "-T" + _format;
start.UseShellExecute = false;
start.RedirectStandardInput = true;
start.RedirectStandardOutput = true;
// Prepare the GraphVizWriter and Streams
GraphVizWriter gvzwriter = new GraphVizWriter();
using (BinaryWriter writer = new BinaryWriter(new FileStream(filename, FileMode.Create)))
{
// Start the Process
Process gvz = new Process();
gvz.StartInfo = start;
gvz.Start();
// Write to the Standard Input
gvzwriter.Save(g, gvz.StandardInput);
// Read the Standard Output
byte[] buffer = new byte[4096];
using (BinaryReader reader = new BinaryReader(gvz.StandardOutput.BaseStream))
{
while (true)
{
int read = reader.Read(buffer, 0, buffer.Length);
if (read == 0)
{
break;
}
writer.Write(buffer, 0, read);
}
reader.Close();
}
writer.Close();
gvz.Close();
}
// Open if requested
if (open)
{
Process.Start(filename);
}
}
public void WritingGraphViz1()
{
Skip.IfNot(TestConfigManager.GetSettingAsBoolean(TestConfigManager.UseGraphViz),
"Test Config marks GraphViz as unavailable, test cannot be run");
Graph g = new Graph();
g.LoadFromEmbeddedResource("VDS.RDF.Configuration.configuration.ttl");
GraphVizWriter writer = new GraphVizWriter();
writer.Save(g, "WritingGraphViz1.dot");
}
public static void Main(string[] args)
{
Graph g = new Graph();
Graph h = new Graph();
UriLoader.Load(g, new Uri("http://nottm.ecs.soton.ac.uk/AllAboutThatWeb/profiles/exports/14"));
UriLoader.Load(h, new Uri("http://nottm.ecs.soton.ac.uk/AllAboutThatWeb/profiles/14"));
//Output to GraphViz
GraphVizGenerator gvizgen = new GraphVizGenerator("png");
gvizgen.Generate(g, "Triple.png", false);
gvizgen.Generate(h, "AATTriple.png", false);
GraphVizWriter gvizwriter = new GraphVizWriter();
gvizwriter.Save(g, "Triple.dot");
gvizwriter.Save(h, "AATTriple.dot");
}
public static void Main(string[] args)
{
//Create a new Empty Graph
Graph g = new Graph();
//Define Namespaces
g.NamespaceMap.AddNamespace("pets", new Uri("http://example.org/pets"));
//Create Uri Nodes
IUriNode dog, fido, rob, owner, name, species, breed, lab;
dog = g.CreateUriNode("pets:Dog");
fido = g.CreateUriNode("pets:abc123");
rob = g.CreateUriNode("pets:def456");
owner = g.CreateUriNode("pets:hasOwner");
name = g.CreateUriNode("pets:hasName");
species = g.CreateUriNode("pets:isAnimal");
breed = g.CreateUriNode("pets:isBreed");
lab = g.CreateUriNode("pets:Labrador");
//Assert Triples
g.Assert(new Triple(fido, species, dog));
g.Assert(new Triple(fido, owner, rob));
g.Assert(new Triple(fido, name, g.CreateLiteralNode("Fido")));
g.Assert(new Triple(rob, name, g.CreateLiteralNode("Rob")));
g.Assert(new Triple(fido, breed, lab));
//Attempt to output GraphViz
try
{
Console.WriteLine("Writing GraphViz DOT file graph_building_example2.dot");
GraphVizWriter gvzwriter = new GraphVizWriter();
gvzwriter.Save(g, "graph_building_example2.dot");
Console.WriteLine("Creating a PNG got this Graph called graph_building_example2.png");
GraphVizGenerator gvzgen = new GraphVizGenerator("svg", "C:\\Program Files (x86)\\Graphviz2.20\\bin");
gvzgen.Format = "png";
gvzgen.Generate(g, "graph_building_example2.png", false);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine(ex.StackTrace);
}
}
private static string ProcessNode(Triple t, TripleSegment segment, BaseWriterContext context, bool collapseLiterals)
{
var node = GraphVizWriter.GetNode(t, segment);
switch (node)
{
case ILiteralNode literalnode:
return(GraphVizWriter.WriteLiteralNode(literalnode, t, context, collapseLiterals));
case IUriNode uriNode:
return(GraphVizWriter.ReduceToQName(uriNode.Uri, context));
case IBlankNode blankNode:
return(blankNode.ToString());
default:
throw new RdfOutputException("Only Uri nodes, literal nodes and blank nodes can be converted to GraphViz DOT Format.");
}
}
/// <summary>
/// Generates GraphViz Output for the given Graph
/// </summary>
/// <param name="g">Graph to generated GraphViz Output for</param>
/// <param name="filename">File you wish to save the Output to</param>
/// <param name="open">Whether you want to open the Output in the default application (according to OS settings) for the filetype after it is Created</param>
public void Generate(IGraph g, String filename, bool open)
{
//Prepare the Process
ProcessStartInfo start = new ProcessStartInfo();
if (!_graphvizdir.Equals(String.Empty))
{
start.FileName = this._graphvizdir + "dot.exe";
}
else
{
start.FileName = "dot.exe";
}
start.Arguments = "-T" + this._format;
start.UseShellExecute = false;
start.RedirectStandardInput = true;
start.RedirectStandardOutput = true;
//Prepare the GraphVizWriter and Streams
GraphVizWriter gvzwriter = new GraphVizWriter();
BinaryWriter output = new BinaryWriter(new FileStream(filename, FileMode.Create));
//Start the Process
Process gvz = new Process();
gvz.StartInfo = start;
gvz.Start();
//Write to the Standard Input
gvzwriter.Save(g, gvz.StandardInput);
//Read the Standard Output
Tools.StreamCopy(gvz.StandardOutput.BaseStream, output.BaseStream);
output.Close();
gvz.Close();
//Open if requested
if (open)
{
Process.Start(filename);
}
}
private void btnVisualise_Click(object sender, EventArgs e)
{
if (this.txtFile.Text.Equals(String.Empty))
{
MessageBox.Show("You must enter a filename you wish to visualise the Graph to", "Filename Required", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
try
{
switch (Path.GetExtension(this.txtFile.Text))
{
case ".dot":
case "dot":
GraphVizWriter dotwriter = new GraphVizWriter();
dotwriter.Save(this._g, this.txtFile.Text);
break;
case ".png":
case "png":
GraphVizGenerator pnggenerator = new GraphVizGenerator("png");
pnggenerator.Generate(this._g, this.txtFile.Text, true);
break;
case ".svg":
case "svg":
default:
GraphVizGenerator svggenerator = new GraphVizGenerator("svg");
svggenerator.Generate(this._g, this.txtFile.Text, true);
break;
}
}
catch (Exception ex)
{
MessageBox.Show("An Error occurred while trying to visualise the selected Graph:\n" + ex.Message, "Visualisation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
this.DialogResult = DialogResult.OK;
this.Close();
}
}
private static void WriteGraph(BaseWriterContext context, bool collapseLiterals)
{
context.Output.Write(DOT.Digraph);
if (context.Graph.BaseUri != null)
{
var graphId = GraphVizWriter.ReduceToQName(context.Graph.BaseUri, context);
GraphVizWriter.Prettify(DOT.Space, context);
GraphVizWriter.WriteQuoted(graphId, context);
}
GraphVizWriter.Prettify(DOT.Space, context);
context.Output.Write(DOT.OpenCurly);
GraphVizWriter.Prettify(DOT.NewLine, context);
foreach (var t in context.Graph.Triples)
{
GraphVizWriter.WriteTriple(t, context, collapseLiterals);
}
context.Output.Write(DOT.CloseCurly);
}
private static void WriteLiteralNodeLabel(ILiteralNode literalnode, BaseWriterContext context)
{
var nodeValue = GraphVizWriter.Escape(literalnode.Value);
context.Output.Write(DOT.Quote);
context.Output.Write(nodeValue);
if (!string.IsNullOrEmpty(literalnode.Language))
{
context.Output.Write("@");
context.Output.Write(literalnode.Language);
}
if (literalnode.DataType != null)
{
string datatype = GraphVizWriter.ReduceToQName(literalnode.DataType, context);
context.Output.Write("^^");
context.Output.Write(datatype);
}
context.Output.Write(DOT.Quote);
}
public void GraphCreation1()
{
//Create a new Empty Graph
Graph g = new Graph();
Assert.IsNotNull(g);
//Define Namespaces
g.NamespaceMap.AddNamespace("vds", new Uri("http://www.vdesign-studios.com/dotNetRDF#"));
g.NamespaceMap.AddNamespace("ecs", new Uri("http://id.ecs.soton.ac.uk/person/"));
//Check we set the Namespace OK
Assert.IsTrue(g.NamespaceMap.HasNamespace("vds"), "Failed to set a Namespace");
//Set Base Uri
g.BaseUri = g.NamespaceMap.GetNamespaceUri("vds");
Assert.IsNotNull(g.BaseUri);
Assert.AreEqual(g.NamespaceMap.GetNamespaceUri("vds"), g.BaseUri);
//Create Uri Nodes
IUriNode rav08r, wh, lac, hcd;
rav08r = g.CreateUriNode("ecs:11471");
wh = g.CreateUriNode("ecs:1650");
hcd = g.CreateUriNode("ecs:46");
lac = g.CreateUriNode("ecs:60");
//Create Uri Nodes for some Predicates
IUriNode supervises, collaborates, advises, has;
supervises = g.CreateUriNode("vds:supervises");
collaborates = g.CreateUriNode("vds:collaborates");
advises = g.CreateUriNode("vds:advises");
has = g.CreateUriNode("vds:has");
//Create some Literal Nodes
ILiteralNode singleLine = g.CreateLiteralNode("Some string");
ILiteralNode multiLine = g.CreateLiteralNode("This goes over\n\nseveral\n\nlines");
ILiteralNode french = g.CreateLiteralNode("Bonjour", "fr");
ILiteralNode number = g.CreateLiteralNode("12", new Uri(g.NamespaceMap.GetNamespaceUri("xsd") + "integer"));
g.Assert(new Triple(wh, supervises, rav08r));
g.Assert(new Triple(lac, supervises, rav08r));
g.Assert(new Triple(hcd, advises, rav08r));
g.Assert(new Triple(wh, collaborates, lac));
g.Assert(new Triple(wh, collaborates, hcd));
g.Assert(new Triple(lac, collaborates, hcd));
g.Assert(new Triple(rav08r, has, singleLine));
g.Assert(new Triple(rav08r, has, multiLine));
g.Assert(new Triple(rav08r, has, french));
g.Assert(new Triple(rav08r, has, number));
//Now print all the Statements
Console.WriteLine("All Statements");
foreach (Triple t in g.Triples)
{
Console.WriteLine(t.ToString());
}
//Get statements about Rob Vesse
Console.WriteLine();
Console.WriteLine("Statements about Rob Vesse");
foreach (Triple t in g.GetTriples(rav08r))
{
Console.WriteLine(t.ToString());
}
//Get Statements about Collaboration
Console.WriteLine();
Console.WriteLine("Statements about Collaboration");
foreach (Triple t in g.GetTriples(collaborates))
{
Console.WriteLine(t.ToString());
}
//Attempt to output Turtle for this Graph
try
{
Console.WriteLine("Writing Turtle file graph_building_example.ttl");
TurtleWriter ttlwriter = new TurtleWriter();
ttlwriter.Save(g, "graph_building_example.ttl");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine(ex.StackTrace);
}
//Attempt to output GraphViz
try
{
Console.WriteLine("Writing GraphViz DOT file graph_building_example.dot");
GraphVizWriter gvzwriter = new GraphVizWriter();
gvzwriter.Save(g, "graph_building_example.dot");
Console.WriteLine("Attempting Live GraphViz Generation as SVG");
GraphVizGenerator gvzgen = new GraphVizGenerator("svg", "C:\\Program Files (x86)\\Graphviz2.20\\bin");
gvzgen.Generate(g, "graph_building_example.svg", false);
Console.WriteLine("Attempting Live GraphViz Generation as PNG");
gvzgen.Format = "png";
gvzgen.Generate(g, "graph_building_example.png", false);
}
catch (Exception ex)
{
TestTools.ReportError("Exception using GraphViz", ex, true);
}
}
/// <summary>
/// Generates GraphViz Output for the given Graph
/// </summary>
/// <param name="g">Graph to generated GraphViz Output for</param>
/// <param name="filename">File you wish to save the Output to</param>
/// <param name="open">Whether you want to open the Output in the default application (according to OS settings) for the filetype after it is Created</param>
public void Generate(IGraph g, String filename, bool open)
{
//Prepare the Process
ProcessStartInfo start = new ProcessStartInfo();
if (!_graphvizdir.Equals(String.Empty)) {
start.FileName = this._graphvizdir + "dot.exe";
} else {
start.FileName = "dot.exe";
}
start.Arguments = "-T" + this._format;
start.UseShellExecute = false;
start.RedirectStandardInput = true;
start.RedirectStandardOutput = true;
//Prepare the GraphVizWriter and Streams
GraphVizWriter gvzwriter = new GraphVizWriter();
BinaryWriter output = new BinaryWriter(new FileStream(filename, FileMode.Create));
//Start the Process
Process gvz = new Process();
gvz.StartInfo = start;
gvz.Start();
//Write to the Standard Input
gvzwriter.Save(g, gvz.StandardInput);
//Read the Standard Output
Tools.StreamCopy(gvz.StandardOutput.BaseStream, output.BaseStream);
output.Close();
gvz.Close();
//Open if requested
if (open)
{
Process.Start(filename);
}
}
