public void AddExpansionDataset(ExpansionDataset d)
{
if (!this._datasets.ContainsKey(d.Subject))
{
this._datasets.Add(d.Subject, d);
}
}
protected override void Initialise(IGraph g)
{
if (g.BaseUri != null) this._node = g.CreateUriNode();
//First ensure all the correct namespace prefixes are set to the correct URIs
g.NamespaceMap.AddNamespace("rdf", new Uri(NamespaceMapper.RDF));
g.NamespaceMap.AddNamespace("void", new Uri(VoIDNamespace));
g.NamespaceMap.AddNamespace("foaf", new Uri(FoafNamespace));
g.NamespaceMap.AddNamespace("dcterms", new Uri(DublinCoreTermsNamespace));
g.NamespaceMap.AddNamespace("aat", new Uri(AATNamespace));
//First look for an Expansion Profile description
Triple profileDescriptor = new Triple(g.CreateUriNode(), g.CreateUriNode("rdf:type"), g.CreateUriNode("aat:ExpansionProfile"));
if (g.ContainsTriple(profileDescriptor))
{
//Does it specify a Max Expansion Depth?
Triple maxDepthSpecifier = g.GetTriplesWithSubjectPredicate(g.CreateUriNode(), g.CreateUriNode("aat:maxExpansionDepth")).FirstOrDefault();
if (maxDepthSpecifier != null)
{
if (maxDepthSpecifier.Object.NodeType == NodeType.Literal)
{
ILiteralNode l = (ILiteralNode)maxDepthSpecifier.Object;
if (l.DataType != null && l.DataType.ToString().Equals(XmlSpecsHelper.XmlSchemaDataTypeInteger))
{
this._maxDepth = Int32.Parse(l.Value);
}
}
}
}
//Find Datasets
foreach (Triple t in g.GetTriplesWithPredicateObject(g.CreateUriNode("rdf:type"), g.CreateUriNode("void:Dataset")))
{
ExpansionDataset dataset = new ExpansionDataset(g, t.Subject);
if (this._datasets.ContainsKey(t.Subject))
{
throw new NotImplementedException("Merging Expansion Datasets is not yet implemented");
}
else
{
this._datasets.Add(t.Subject, dataset);
}
}
//Find Linksets
foreach (Triple t in g.GetTriplesWithPredicateObject(g.CreateUriNode("rdf:type"), g.CreateUriNode("void:Linkset")))
{
ExpansionLinkset linkset = new ExpansionLinkset(g, t.Subject);
if (this._linksets.ContainsKey(t.Subject))
{
throw new NotImplementedException("Merging Expansion Linksets is not yet implemented");
}
else
{
this._linksets.Add(t.Subject, linkset);
}
}
}
public void AddExpansionDataset(ExpansionDataset d)
{
if (!this._datasets.ContainsKey(d.Subject))
{
this._datasets.Add(d.Subject, d);
}
}
private void ExpandByDataset(UriToExpand u, ExpansionContext context, ExpansionDataset dataset)
{
if (u.Depth == context.Profile.MaxExpansionDepth) return;
if (dataset.Ignore) return;
foreach (Uri endpoint in dataset.SparqlEndpoints)
{
Thread.Sleep(HttpRequestInterval);
SparqlRemoteEndpoint sparqlEndpoint = new SparqlRemoteEndpoint(endpoint);
try
{
SparqlParameterizedString queryString = new SparqlParameterizedString("DESCRIBE @uri");
queryString.SetUri("uri", u.Uri);
Object temp = sparqlEndpoint.QueryWithResultGraph(queryString.ToString());
if (temp is Graph)
{
Graph g = (Graph)temp;
this.ExpandGraph(u, g, context);
}
}
catch (RdfException rdfEx)
{
this.DebugErrors("Error: Tried to DESCRIBE <" + u.Uri.ToString() + "> against the SPARQL Endpoint <" + endpoint.ToString() + "> but an error occurred:", rdfEx);
}
catch (WebException webEx)
{
this.DebugErrors("Error: Tried to DESCRIBE <" + u.Uri.ToString() + "> against the SPARQL Endpoint <" + endpoint.ToString() + "> but an error occurred:", webEx);
}
}
foreach (Uri endpoint in dataset.UriLookupEndpoints)
{
this.ExpandByUriLookup(u, context, endpoint);
}
foreach (Uri endpoint in dataset.UriDiscoveryEndpoints)
{
this.ExpandByUriDiscovery(u, context, endpoint);
}
}
protected override void Initialise(IGraph g)
{
if (g.BaseUri != null)
{
this._node = g.CreateUriNode();
}
//First ensure all the correct namespace prefixes are set to the correct URIs
g.NamespaceMap.AddNamespace("rdf", new Uri(NamespaceMapper.RDF));
g.NamespaceMap.AddNamespace("void", new Uri(VoIDNamespace));
g.NamespaceMap.AddNamespace("foaf", new Uri(FoafNamespace));
g.NamespaceMap.AddNamespace("dcterms", new Uri(DublinCoreTermsNamespace));
g.NamespaceMap.AddNamespace("aat", new Uri(AATNamespace));
//First look for an Expansion Profile description
Triple profileDescriptor = new Triple(g.CreateUriNode(), g.CreateUriNode("rdf:type"), g.CreateUriNode("aat:ExpansionProfile"));
if (g.ContainsTriple(profileDescriptor))
{
//Does it specify a Max Expansion Depth?
Triple maxDepthSpecifier = g.GetTriplesWithSubjectPredicate(g.CreateUriNode(), g.CreateUriNode("aat:maxExpansionDepth")).FirstOrDefault();
if (maxDepthSpecifier != null)
{
if (maxDepthSpecifier.Object.NodeType == NodeType.Literal)
{
ILiteralNode l = (ILiteralNode)maxDepthSpecifier.Object;
if (l.DataType != null && l.DataType.ToString().Equals(XmlSpecsHelper.XmlSchemaDataTypeInteger))
{
this._maxDepth = Int32.Parse(l.Value);
}
}
}
}
//Find Datasets
foreach (Triple t in g.GetTriplesWithPredicateObject(g.CreateUriNode("rdf:type"), g.CreateUriNode("void:Dataset")))
{
ExpansionDataset dataset = new ExpansionDataset(g, t.Subject);
if (this._datasets.ContainsKey(t.Subject))
{
throw new NotImplementedException("Merging Expansion Datasets is not yet implemented");
}
else
{
this._datasets.Add(t.Subject, dataset);
}
}
//Find Linksets
foreach (Triple t in g.GetTriplesWithPredicateObject(g.CreateUriNode("rdf:type"), g.CreateUriNode("void:Linkset")))
{
ExpansionLinkset linkset = new ExpansionLinkset(g, t.Subject);
if (this._linksets.ContainsKey(t.Subject))
{
throw new NotImplementedException("Merging Expansion Linksets is not yet implemented");
}
else
{
this._linksets.Add(t.Subject, linkset);
}
}
}