/// <summary>
/// Executes a SparqlQuery on the store.
/// </summary>
/// <param name="query"></param>
/// <param name="transaction"></param>
/// <returns></returns>
public override ISparqlQueryResult ExecuteQuery(ISparqlQuery query, ITransaction transaction = null)
{
if (query.IsInferenceEnabled && _reasoner != null)
{
_store.AddInferenceEngine(_reasoner);
}
else
{
_store.ClearInferenceEngines();
}
string q = query.ToString();
object results = ExecuteQuery(q);
if (results is IGraph)
{
return(new dotNetRDFQueryResult(this, query, results as IGraph));
}
else if (results is SparqlResultSet)
{
return(new dotNetRDFQueryResult(this, query, results as SparqlResultSet));
}
return(null);
}
public void SparqlViewAndReasonerInteraction1()
{
TripleStore store = new TripleStore();
SparqlView view = new SparqlView("CONSTRUCT { ?s a ?type } WHERE { GRAPH ?g { ?s a ?type } }", store);
view.BaseUri = new Uri("http://example.org/view");
store.Add(view);
Console.WriteLine("SPARQL View Empty");
TestTools.ShowGraph(view);
Console.WriteLine();
//Load a Graph into the Store to cause the SPARQL View to update
Graph g = new Graph();
FileLoader.Load(g, "resources\\InferenceTest.ttl");
g.BaseUri = new Uri("http://example.org/data");
store.Add(g);
Thread.Sleep(500);
if (view.Triples.Count == 0)
{
view.UpdateView();
}
Console.WriteLine("SPARQL View Populated");
TestTools.ShowGraph(view);
Console.WriteLine();
Assert.True(view.Triples.Count > 0, "View should have updated to contain some Triples");
int lastCount = view.Triples.Count;
//Apply an RDFS reasoner
StaticRdfsReasoner reasoner = new StaticRdfsReasoner();
reasoner.Initialise(g);
store.AddInferenceEngine(reasoner);
Thread.Sleep(200);
if (view.Triples.Count == lastCount)
{
view.UpdateView();
}
Console.WriteLine("SPARQL View Populated after Reasoner added");
TestTools.ShowGraph(view);
}
public dotNetRDFStore(string[] schema)
{
_store = new TripleStore();
_updateProcessor = new LeviathanUpdateProcessor(_store);
_queryProcessor = new LeviathanQueryProcessor(_store);
_parser = new SparqlUpdateParser();
if (schema == null)
{
return;
}
_reasoner = new RdfsReasoner();
_store.AddInferenceEngine(_reasoner);
foreach (string m in schema)
{
IGraph schemaGraph = LoadSchema(m);
_store.Add(schemaGraph);
_reasoner.Initialise(schemaGraph);
}
}
/// <summary>
/// Creates a new dotNetRDFStore.
/// </summary>
/// <param name="schemes">A list of ontology file paths relative to this assembly. The store will be populated with these ontologies.</param>
public dotNetRDFStore(string[] schemes)
{
_store = new TripleStore();
_updateProcessor = new LeviathanUpdateProcessor(_store);
_queryProcessor = new LeviathanQueryProcessor(_store);
_parser = new SparqlUpdateParser();
if (schemes != null)
{
_reasoner = new RdfsReasoner();
_store.AddInferenceEngine(_reasoner);
foreach (string s in schemes)
{
var directory = new FileInfo(Assembly.GetExecutingAssembly().Location).Directory;
var file = new FileInfo(Path.Combine(directory.FullName, s));
IGraph schemaGraph = LoadSchema(file.FullName);
_store.Add(schemaGraph);
_reasoner.Initialise(schemaGraph);
}
}
}
public void SparqlViewAndReasonerInteraction()
{
try
{
TripleStore store = new TripleStore();
SparqlView view = new SparqlView("CONSTRUCT { ?s a ?type } WHERE { ?s a ?type }", store);
view.BaseUri = new Uri("http://example.org/view");
store.Add(view);
Console.WriteLine("SPARQL View Empty");
TestTools.ShowGraph(view);
Console.WriteLine();
//Load a Graph into the Store to cause the SPARQL View to update
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
g.BaseUri = new Uri("http://example.org/data");
store.Add(g);
Thread.Sleep(200);
if (view.Triples.Count == 0) view.UpdateView();
Console.WriteLine("SPARQL View Populated");
TestTools.ShowGraph(view);
Console.WriteLine();
Assert.IsTrue(view.Triples.Count > 0, "View should have updated to contain some Triples");
int lastCount = view.Triples.Count;
//Apply an RDFS reasoner
StaticRdfsReasoner reasoner = new StaticRdfsReasoner();
reasoner.Initialise(g);
store.AddInferenceEngine(reasoner);
Thread.Sleep(200);
if (view.Triples.Count == lastCount) view.UpdateView();
Console.WriteLine("SPARQL View Populated after Reasoner added");
TestTools.ShowGraph(view);
}
catch (RdfQueryException queryEx)
{
TestTools.ReportError("Query Error", queryEx, true);
}
catch (RdfException ex)
{
TestTools.ReportError("Error", ex, true);
}
}