private static void SaveGraph()
{
var turtleWriter = new TurtleWriter();
//Save to a File
turtleWriter.Save(g, filePath);
}
public void GraphCreation1()
{
//Create a new Empty Graph
Graph g = new Graph();
Assert.NotNull(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.True(g.NamespaceMap.HasNamespace("vds"), "Failed to set a Namespace");
//Set Base Uri
g.BaseUri = g.NamespaceMap.GetNamespaceUri("vds");
Assert.NotNull(g.BaseUri);
Assert.Equal(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);
}
}
static void Main(string[] args)
{
//Going to create a Graph and assert some stuff into it
Graph g = new Graph();
//Try to read from a file
TurtleParser parser = new TurtleParser();
parser.TraceTokeniser = true;
parser.TraceParsing = true;
try
{
StreamReader input = new StreamReader("test.n3");
parser.Load(g, input);
}
catch (RDFException rdfEx)
{
reportError("RDF Exception", rdfEx);
}
catch (IOException ioEx)
{
reportError("IO Exception", ioEx);
}
catch (Exception ex)
{
reportError("Other Exception", ex);
}
Console.WriteLine();
Console.WriteLine();
//Show Namespaces
Console.WriteLine("All Namespaces");
foreach (String pre in g.NamespaceMap.Prefixes)
{
Console.WriteLine(pre + " = " + g.NamespaceMap.GetNamespaceURI(pre));
}
Console.WriteLine();
//Now print all the Statements
Console.WriteLine("All Statements");
foreach (Triple t in g.Triples)
{
Console.WriteLine(t.ToString());
}
System.Threading.Thread.Sleep(60000);
return;
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/"));
//g.BaseURI = g.NamespaceMap.GetNamespaceURI("vds");
URINode rav08r, wh, lac, hcd;
rav08r = g.CreateURINode("ecs:11471");
wh = g.CreateURINode("ecs:1650");
hcd = g.CreateURINode("ecs:46");
lac = g.CreateURINode("ecs:60");
BlankNode blank = g.CreateBlankNode();
URINode a, b, c, d, has;
a = g.CreateURINode("vds:someRel");
b = g.CreateURINode("vds:someOtherRel");
c = g.CreateURINode("vds:someObj");
d = g.CreateURINode("vds:someOtherObj");
has = g.CreateURINode("vds:has");
URINode supervises, collaborates, advises;
supervises = g.CreateURINode("vds:supervises");
collaborates = g.CreateURINode("vds:collaborates");
advises = g.CreateURINode("vds:advises");
LiteralNode singleLine = g.CreateLiteralNode("Some string");
LiteralNode multiLine = g.CreateLiteralNode("This goes over\n\nseveral\n\nlines");
LiteralNode french = g.CreateLiteralNode("Bonjour", "fr");
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, blank, c));
//g.Assert(new Triple(rav08r, blank, d));
g.Assert(new Triple(rav08r, has, singleLine));
g.Assert(new Triple(rav08r, has, multiLine));
g.Assert(new Triple(rav08r, has, french));
//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());
}
//Show Namespaces for URINodes
Console.WriteLine();
Console.WriteLine("Namespaces for URI Nodes");
foreach (URINode u in g.Nodes.URINodes)
{
Console.WriteLine(u.Namespace + " = " + u.URI);
}
//Attempt to output Notation 3 for this Graph
try
{
TurtleWriter n3writer = new TurtleWriter();
n3writer.Save(g, "test.n3");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine(ex.StackTrace);
}
System.Threading.Thread.Sleep(30000);
}
public void Dispose()
{
//Create all of the directories required for the file
var f = new FileInfo(_outputPath);
f.Directory.Create();
if (this._outputFormat == ERdfFormat.RdfXml)
{
using (XmlTextWriter xmlWriter = new XmlTextWriter(_outputPath, new UTF8Encoding(false)))
//Set encoding
{
_output.Save(xmlWriter);
}
}
else if (this._outputFormat == ERdfFormat.TriG)
{
string fileNameAsTrig = GetFilePathBasedOnFormat();
var outparams = new StreamParams(fileNameAsTrig);
outparams.Encoding = Encoding.UTF8;
var writer = new TriGWriter();
if (_store == null)
{
var g = GetXmlDocumentAsGraph();
_store = new TripleStore();
_store.Add(g, true);
}
writer.Save(_store, outparams);
}
else if (this._outputFormat == ERdfFormat.Turtle)
{
var g = GetXmlDocumentAsGraph();
string filePathForFormat = GetFilePathBasedOnFormat();
var writer = new TurtleWriter(TurtleSyntax.W3C);
writer.Save(g, filePathForFormat);
}
else if (this._outputFormat == ERdfFormat.NTriples)
{
var g = GetXmlDocumentAsGraph();
string filePathForFormat = GetFilePathBasedOnFormat();
var writer = new NTriplesWriter();
writer.Save(g, filePathForFormat);
}
else if (this._outputFormat == ERdfFormat.N3)
{
var g = GetXmlDocumentAsGraph();
string filePathForFormat = GetFilePathBasedOnFormat();
var writer = new Notation3Writer();
writer.Save(g, filePathForFormat);
}
else if (this._outputFormat == ERdfFormat.NQuads)
{
string filePathForFormat = GetFilePathBasedOnFormat();
var outparams = new StreamParams(filePathForFormat);
outparams.Encoding = Encoding.UTF8;
if (_store == null)
{
var g = GetXmlDocumentAsGraph();
_store = new TripleStore();
_store.Add(g, true);
}
var writer = new NQuadsWriter();
writer.Save(_store, outparams);
}
//make sure it's not null - can happen if no graphs have yet to be asserted!!
if (_store != null)
{
foreach (var graph in _store.Graphs)
{
graph.Dispose();
}
_store.Dispose();
GC.Collect();
}
}
