public string QueryTripleStoreRaw(SparqlParameterizedString queryString)
{
var sparqlParser = new SparqlQueryParser();
AddAllColidNamespaces(queryString);
var query = sparqlParser.ParseFromString(queryString);
//Object results = _store.ExecuteQuery(query);
Object results = _processor.ProcessQuery(query);
if (results is IGraph)
{
IGraph g = (IGraph)results;
return(ConvertGraphToString(g));
}
throw new System.Exception("Execute failed");
}
public void SparqlServiceWithNonExistentService()
{
String query = "SELECT * WHERE { SERVICE <http://www.dotnetrdf.org/noSuchService> { ?s a ?type } } LIMIT 10";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
LeviathanQueryProcessor processor = new LeviathanQueryProcessor(new TripleStore());
try
{
Object results = processor.ProcessQuery(q);
Assert.True(false, "Should have errored");
}
catch (RdfQueryException queryEx)
{
Console.WriteLine("Errored as expected");
TestTools.ReportError("Query Error", queryEx);
}
}
public void TestAsyncQueryWithQueryCallback()
{
var store = new TripleStore();
var g = new Graph();
g.LoadFromEmbeddedResource("VDS.RDF.Configuration.configuration.ttl");
store.Add(g);
var dataset = new InMemoryDataset(store, g.BaseUri);
var processor = new LeviathanQueryProcessor(dataset);
var wait = new AutoResetEvent(false);
var parser = new SparqlQueryParser();
var query = parser.ParseFromString(
"SELECT * WHERE { ?instance a ?class }");
var callbackInvoked = false;
var syncResultSet = processor.ProcessQuery(query) as SparqlResultSet;
Assert.NotNull(syncResultSet);
var syncResultCount = syncResultSet.Count;
var resultSet = new SparqlResultSet();
var resultHandler = new ResultSetHandler(resultSet);
processor.ProcessQuery(null, resultHandler, query, (rdfHandler, rsetHandler, state) =>
{
try
{
Assert.IsNotType <AsyncError>(state);
Assert.Equal("some state", state);
}
finally
{
callbackInvoked = true;
wait.Set();
}
}, "some state");
wait.WaitOne();
var resultCount = resultSet.Count;
Assert.True(callbackInvoked);
Assert.True(resultCount > 0);
Assert.Equal(syncResultCount, resultCount);
}
public static SparqlResultSet PerformQuery(string q, Graph g)
{
SparqlParameterizedString queryString = new SparqlParameterizedString();
queryString.Namespaces.AddNamespace("ldp", new Uri("http://www.w3.org/ns/ldp#"));
queryString.Namespaces.AddNamespace("dct", new Uri("http://purl.org/dc/terms/"));
queryString.CommandText = q;
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery query = parser.ParseFromString(queryString);
TripleStore store = new TripleStore();
store.Add(g);
ISparqlQueryProcessor processor = new LeviathanQueryProcessor(store);
SparqlResultSet results = processor.ProcessQuery(query) as SparqlResultSet;
return(results);
}
public static AmrTerm GetAmrTerm(IGraph g, AmrNode node)
{
AmrTerm result = new AmrTerm();
SparqlQueryParser qparser = new SparqlQueryParser();
var str = "SELECT ?p WHERE { <" + node.uriid + "> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?p }";
SparqlQuery q = qparser.ParseFromString(str);
var rset = (SparqlResultSet)g.ExecuteQuery(q);
var SB = new StringBuilder();
if (rset.Result && rset.Results.Count > 0)
{
foreach (var set in rset.Results)
{
foreach (var r in set)
{
result.uriid = r.Value.ToString();
}
}
}
qparser = new SparqlQueryParser();
str = "SELECT ?p WHERE { <" + result.uriid + "> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?p }";
q = qparser.ParseFromString(str);
rset = (SparqlResultSet)g.ExecuteQuery(q);
if (rset.Result && rset.Results.Count > 0)
{
foreach (var set in rset.Results)
{
foreach (var r in set)
{
result.type = r.Value.ToString();
}
}
}
//s http://amr.isi.edu/frames/ld/v1.2.2/dedicate-01
//x http://www.w3.org/1999/02/22-rdf-syntax-ns#type
//p http://amr.isi.edu/rdf/core-amr#Frame
return(result);
}
public IGraph QueryTripleStoreGraphResult(SparqlParameterizedString queryString)
{
var sparqlParser = new SparqlQueryParser();
AddAllColidNamespaces(queryString);
var query = sparqlParser.ParseFromString(queryString);
Object results = _processor.ProcessQuery(query);
if (results is IGraph)
{
//Print out the Results
IGraph rset = (VDS.RDF.Graph)results;
rset.BaseUri = new Uri("https://pid.bayer.com/fake-base-uri");
return(rset);
}
return(null);
}
public void SparqlGroupByRefactor7()
{
String query = "SELECT ?s WHERE { ?s ?p ?o } GROUP BY (?s)";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
String queryStr = q.ToString();
Console.WriteLine("Raw ToString()");
Console.WriteLine(queryStr);
Console.WriteLine();
Assert.Contains("GROUP BY ?s", queryStr);
String queryStrFmt = new SparqlFormatter().Format(q);
Console.WriteLine("Formatted String");
Console.WriteLine(queryStrFmt);
Assert.Contains("GROUP BY ?s", queryStrFmt);
}
public void SparqlServiceUsingDBPediaAndBindings()
{
Skip.IfNot(TestConfigManager.GetSettingAsBoolean(TestConfigManager.UseRemoteParsing), "Test Config marks Remote Parsing as unavailable, test cannot be run");
String query = "SELECT * WHERE { SERVICE <http://dbpedia.org/sparql> { ?s a ?type } } VALUES ?s { <http://dbpedia.org/resource/Southampton> <http://dbpedia.org/resource/Ilkeston> }";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
LeviathanQueryProcessor processor = new LeviathanQueryProcessor(new TripleStore());
Object results = processor.ProcessQuery(q);
if (results is SparqlResultSet)
{
TestTools.ShowResults(results);
}
else
{
Assert.True(false, "Should have returned a SPARQL Result Set");
}
}
public List <TriplesDM> GetTriples(string query)
{
List <TriplesDM> triples = new List <TriplesDM>();
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
foreach (var item in q.RootGraphPattern.TriplePatterns)
{
triples.Add(new TriplesDM()
{
Subject = (item as TriplePattern).Subject.ToString(),
Predicate = (item as TriplePattern).Predicate.ToString(),
Obj = (item as TriplePattern).Object.ToString()
});
var subject = (item as TriplePattern).Subject;
var predicate = (item as TriplePattern).Predicate;
var obj = (item as TriplePattern).Object;
}
return(triples);
}
public static void ApplyInference(IGraph graph, IGraph schema)
{
string inverseOf = @"
PREFIX owl: <http://www.w3.org/2002/07/owl#>
CONSTRUCT { ?y ?q ?x }
WHERE { ?p owl:inverseOf ?q .
?x ?p ?y . }
";
var parser = new SparqlQueryParser();
var rules = new List <SparqlQuery>();
rules.Add(parser.ParseFromString(inverseOf));
var store = new TripleStore();
store.Add(graph, true);
store.Add(schema, true);
var queryProcessor = new LeviathanQueryProcessor(store);
while (true)
{
int before = store.Triples.Count();
foreach (var rule in rules)
{
IGraph inferred = (IGraph)queryProcessor.ProcessQuery(rule);
//store.Add(inferred);
graph.Merge(inferred);
}
int after = store.Triples.Count();
if (after == before)
{
break;
}
}
}
public void SparqlFormattingFilter2()
{
String query = "SELECT * WHERE { { ?s ?p ?o } FILTER(REGEX(?o, 'search', 'i')) }";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
Console.WriteLine("ToString() form:");
String toString = q.ToString();
Console.WriteLine(toString);
Console.WriteLine();
Console.WriteLine("Format() form:");
String formatted = this._formatter.Format(q);
Console.WriteLine(formatted);
Assert.IsTrue(toString.Contains("FILTER"), "ToString() form should contain FILTER");
Assert.IsTrue(toString.Contains("i"), "ToString() form should contain i option");
Assert.IsTrue(formatted.Contains("FILTER"), "Format() form should contain FILTER");
Assert.IsTrue(toString.Contains("i"), "Format() form should contain i option");
}
public static String GetAmrNode(IGraph g, AMREduSentence sentence)
{
String result = string.Empty;
SparqlQueryParser qparser = new SparqlQueryParser();
var str = "SELECT ?p WHERE { <" + sentence.urlid + "> <http://amr.isi.edu/rdf/core-amr#root> ?p }";
SparqlQuery q = qparser.ParseFromString(str);
var rset = (SparqlResultSet)g.ExecuteQuery(q);
var SB = new StringBuilder();
if (rset.Result && rset.Results.Count > 0)
{
foreach (var set in rset.Results)
{
foreach (var r in set)
{
result = r.Value.ToString();
}
}
}
return(result);
}
public void InsertValuesClause()
{
var g = new Graph();
g.LoadFromFile("resources\\rvesse.ttl");
var parser = new SparqlQueryParser();
SparqlQuery startingQuery =
parser.ParseFromString("SELECT * WHERE { <http://www.dotnetrdf.org/people#rvesse> ?p ?o }");
var bindingVars = new List<string> {"p"};
var binding = new BindingsPattern(bindingVars);
binding.AddTuple(new BindingTuple(bindingVars, new List<PatternItem>
{
new NodeMatchPattern(g.CreateUriNode(UriFactory.Create("http://xmlns.com/foaf/0.1/name")))
}));
binding.AddTuple(new BindingTuple(bindingVars, new List<PatternItem>
{
new NodeMatchPattern(g.CreateUriNode(UriFactory.Create("http://xmlns.com/foaf/0.1/givenname")))
}));
startingQuery.RootGraphPattern.AddInlineData(binding);
g.ExecuteQuery(startingQuery).Should().BeAssignableTo<SparqlResultSet>().Which.Count.Should().Be(2);
}
public IEnumerable <IDataObject> BindRdfDataObjects(IGraph g,
IList <OrderingDirection> orderingDirections)
{
var p = new LeviathanQueryProcessor(new InMemoryDataset(g));
var queryString = MakeOrderedResourceQuery(orderingDirections);
var sparqlParser = new SparqlQueryParser();
var query = sparqlParser.ParseFromString(queryString);
var queryResultSet = p.ProcessQuery(query) as SparqlResultSet;
if (queryResultSet != null)
{
foreach (var row in queryResultSet.Results)
{
INode uriNode;
if (row.TryGetBoundValue("x", out uriNode) && uriNode is IUriNode)
{
yield return(BindRdfDataObject((IUriNode)uriNode, g));
}
}
}
}
public SparqlResultSet RunQueryDataTable(String queryString)
{
queryString =
"PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> \n " +
"PREFIX owl: <http://www.w3.org/2002/07/owl#> \n " +
"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> \n " +
"PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> \n " + queryString;
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery query = parser.ParseFromString(queryString);
Object resultsSet = Ontology.ExecuteQuery(query);
if (resultsSet is SparqlResultSet)
{
return((SparqlResultSet)resultsSet);
}
else
{
return(null);
}
}
public void SparqlBindToExistingVariableLazy()
{
String query = "PREFIX fn: <" + XPathFunctionFactory.XPathFunctionsNamespace + "> SELECT * WHERE { ?s ?p ?o . BIND(?s AS ?p) } LIMIT 1";
TripleStore store = new TripleStore();
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
store.Add(g);
SparqlQueryParser parser = new SparqlQueryParser();
try
{
SparqlQuery q = parser.ParseFromString(query);
Console.WriteLine(q.ToAlgebra().ToString());
Assert.IsTrue(q.ToAlgebra().ToString().Contains("LazyBgp"), "Should have been optimised to use a Lazy BGP");
Console.WriteLine();
store.ExecuteQuery(q);
Assert.Fail("Expected a RdfParseException/RdfQueryException to be thrown");
}
catch (RdfParseException parseEx)
{
Console.WriteLine("Parsing Error thrown as expected");
TestTools.ReportError("Parser Error", parseEx);
}
catch (RdfQueryException queryEx)
{
Console.WriteLine("Query Error thrown as expected");
TestTools.ReportError("Query Error", queryEx);
}
catch (Exception ex)
{
TestTools.ReportError("Unexpected Error", ex);
Assert.Fail("Did not get a RdfParseException/RdfQueryException as expected");
}
}
public SparqlResultSet QueryTripleStoreResultSet(SparqlParameterizedString parameterizedString)
{
var processor = new LeviathanQueryProcessor(_dataset);
var sparqlParser = new SparqlQueryParser();
AddAllPidNamespaces(parameterizedString);
var query = sparqlParser.ParseFromString(parameterizedString);
Object results = processor.ProcessQuery(query);
//Object results = _store.ExecuteQuery(query);
if (results is SparqlResultSet rset)
{
//Print out the Results
return(rset);
}
return(null);
}
private void ProcessPartialResult(
SparqlParameterizedString parametrizedCommandText,
SparqlQueryVariables queryVariables,
SparqlQueryParser parser,
List <SparqlResult> result,
SparqlResult row,
ParallelLoopState state)
{
if (state.IsStopped)
{
return;
}
SparqlQuery query;
lock (parametrizedCommandText)
{
parametrizedCommandText.SetUri("graph", ((IUriNode)row[queryVariables.MetaGraph]).Uri);
query = parser.ParseFromString(parametrizedCommandText);
}
query.Timeout = Timeout;
try
{
var graphResult = ((SparqlResultSet)_processor.ProcessQuery(query)).Results;
lock (result)
{
result.AddRange(graphResult);
}
}
catch (RdfQueryTimeoutException)
{
state.Stop();
lock (result)
{
result.Clear();
}
}
}
public override org.openrdf.query.Query prepareQuery(org.openrdf.query.QueryLanguage ql, string str)
{
if (!this.SupportsQueryLanguage(ql))
{
throw UnsupportedQueryLanguage(ql);
}
try
{
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(str);
switch (q.QueryType)
{
case SparqlQueryType.Ask:
return(new InMemoryBooleanQuery(str, this._store));
case SparqlQueryType.Construct:
case SparqlQueryType.Describe:
case SparqlQueryType.DescribeAll:
return(new InMemoryGraphQuery(str, this._store));
case SparqlQueryType.Select:
case SparqlQueryType.SelectAll:
case SparqlQueryType.SelectAllDistinct:
case SparqlQueryType.SelectAllReduced:
case SparqlQueryType.SelectDistinct:
case SparqlQueryType.SelectReduced:
return(new InMemoryTupleQuery(str, this._store));
case SparqlQueryType.Unknown:
default:
throw new dotSesameQuery.MalformedQueryException("Unable to parse the given Query into a valid SPARQL Query as the Query Type is unknown");
}
}
catch (RdfParseException parseEx)
{
throw new dotSesameQuery.MalformedQueryException("Unable to parse the given Query into a valid SPARQL Query due to the following error: " + parseEx.Message);
}
}
public void LoadRoot(IGraph graph)
{
SparqlQueryParser qparser = new SparqlQueryParser();
StringBuilder querystr = new StringBuilder();
querystr.AppendLine("PREFIX amr-core: <http://amr.isi.edu/rdf/core-amr#>");
querystr.AppendLine("PREFIX amr-data: <http://amr.isi.edu/amr_data#>");
querystr.AppendLine("PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>");
querystr.AppendLine("PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>");
querystr.AppendLine("PREFIX amr-terms: <http://amr.isi.edu/rdf/amr-terms#>");
querystr.Append("SELECT ?root ");
querystr.Append("WHERE {");
querystr.Append("@sentenceuri amr-core:root ?root ");
querystr.Append("}");
SparqlParameterizedString command = new SparqlParameterizedString();
command.CommandText = querystr.ToString();
command.SetUri("sentenceuri", this.urlid);
SparqlQuery q = qparser.ParseFromString(command);
var rset = (SparqlResultSet)graph.ExecuteQuery(q);
var SB = new StringBuilder();
if (rset.Result && rset.Results.Count > 0)
{
foreach (var result in rset.Results)
{
this.Root = new AMRNode();
this.Root.Id = ((UriNode)result.ElementAt(0).Value).Uri;
LoadData(graph, this.Root);
LoadChildren(graph, this.Root, new List <AMRNode>()
{
this.Root
});
}
}
}
public void SparqlBindScope6()
{
String query = @"PREFIX : <http://example.org>
SELECT *
WHERE
{
{
GRAPH ?g { :s :p ?o }
BIND (?g AS ?in)
}
UNION
{
:s :p ?o .
BIND('default' AS ?in)
}
}";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
Console.WriteLine(q.ToString());
ISparqlAlgebra algebra = q.ToAlgebra();
Console.WriteLine(algebra.ToString());
Assert.IsInstanceOfType(algebra, typeof(Select));
algebra = ((IUnaryOperator)algebra).InnerAlgebra;
Assert.IsInstanceOfType(algebra, typeof(Union));
IUnion union = (Union)algebra;
ISparqlAlgebra lhs = union.Lhs;
Assert.IsInstanceOfType(lhs, typeof(Extend));
ISparqlAlgebra rhs = union.Rhs;
Assert.IsInstanceOfType(rhs, typeof(Join));
}
public void SparqlEvaluationGraphNonExistentUri()
{
String query = "SELECT * WHERE { GRAPH <http://example.org/noSuchGraph> { ?s ?p ?o } }";
TripleStore store = new TripleStore();
var processor = new LeviathanQueryProcessor(store);
var parser = new SparqlQueryParser();
var q = parser.ParseFromString(query);
Object results = processor.ProcessQuery(q);
if (results is SparqlResultSet)
{
TestTools.ShowResults(results);
SparqlResultSet rset = (SparqlResultSet)results;
Assert.True(rset.IsEmpty, "Result Set should be empty");
Assert.Equal(3, rset.Variables.Count());
}
else
{
Assert.True(false, "Query should have returned a SPARQL Result Set");
}
}
public void SparqlResultSetToDataTable6()
{
String query = "ASK WHERE {?s <http://example.org/noSuchPredicate> ?o}";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
Object results = g.ExecuteQuery(q);
if (results is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)results;
DataTable table = (DataTable)rset;
Assert.IsTrue(rset.ResultsType == SparqlResultsType.Boolean);
Assert.AreEqual(table.Columns.Count, 1, "Should only be one Column");
Assert.AreEqual(table.Rows.Count, 1, "Should only be one Row");
Assert.IsFalse((bool)table.Rows[0]["ASK"], "Should be false");
foreach (DataRow row in table.Rows)
{
foreach (DataColumn col in table.Columns)
{
Object temp = row[col];
Console.Write(col.ColumnName + " = " + ((temp != null) ? temp.ToString() : String.Empty) + " , ");
}
Console.WriteLine();
}
}
else
{
Assert.Fail("Query should have returned a Result Set");
}
}
public static List <SparqlResult> RunQuery(string url, string queryString)
{
TripleStore store = new TripleStore();
//Assume that we fill our Store with data from somewhere
//Create a dataset for our queries to operate over
//We need to explicitly state our default graph or the unnamed graph is used
//Alternatively you can set the second parameter to true to use the union of all graphs
//as the default graph
InMemoryDataset ds = new InMemoryDataset(store, new Uri(url));
//Get the Query processor
ISparqlQueryProcessor processor = new LeviathanQueryProcessor(ds);
//Use the SparqlQueryParser to give us a SparqlQuery object
//Should get a Graph back from a CONSTRUCT query
SparqlQueryParser sparqlparser = new SparqlQueryParser();
SparqlQuery query = sparqlparser.ParseFromString(queryString);
var result = processor.ProcessQuery(query);
if (result is SparqlResultSet)
{
var results = (SparqlResultSet)result;
return(results.ToList());
}
//if (result is IGraph)
//{
// //Print out the Results
// IGraph g = (IGraph)result;
// NTriplesFormatter formatter = new NTriplesFormatter();
// return g.Triples.ToList();
//}
return(null);
}
public void SparqlResultSetToDataTable5()
{
String query = "ASK WHERE {?s ?p ?o}";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
Graph g = new Graph();
FileLoader.Load(g, "resources\\InferenceTest.ttl");
Object results = g.ExecuteQuery(q);
if (results is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)results;
DataTable table = rset.ToDataTable();
Assert.True(rset.ResultsType == SparqlResultsType.Boolean);
Assert.Equal(table.Columns.Count, 1);
Assert.Equal(table.Rows.Count, 1);
Assert.True((bool)table.Rows[0]["ASK"], "Should be true");
foreach (DataRow row in table.Rows)
{
foreach (DataColumn col in table.Columns)
{
Object temp = row[col];
Console.Write(col.ColumnName + " = " + ((temp != null) ? temp.ToString() : String.Empty) + " , ");
}
Console.WriteLine();
}
}
else
{
Assert.True(false, "Query should have returned a Result Set");
}
}
public void SparqlServiceUsingDBPedia()
{
if (!TestConfigManager.GetSettingAsBoolean(TestConfigManager.UseRemoteParsing))
{
throw new SkipTestException("Test Config marks Remote Parsing as unavailable, test cannot be run");
}
String query = "SELECT * WHERE { SERVICE <http://dbpedia.org/sparql> { ?s a ?type } } LIMIT 10";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
LeviathanQueryProcessor processor = new LeviathanQueryProcessor(new TripleStore());
Object results = processor.ProcessQuery(q);
if (results is SparqlResultSet)
{
TestTools.ShowResults(results);
}
else
{
Assert.True(false, "Should have returned a SPARQL Result Set");
}
}
public IGraph QueryTripleStoreGraphResult(SparqlParameterizedString queryString)
{
var processor = new LeviathanQueryProcessor(_dataset);
var sparqlParser = new SparqlQueryParser();
AddAllPidNamespaces(queryString);
var query = sparqlParser.ParseFromString(queryString);
Object results = processor.ProcessQuery(query);
//Object results = _store.ExecuteQuery(query);
if (results is IGraph)
{
//Print out the Results
IGraph rset = (VDS.RDF.Graph)results;
return(rset);
}
return(null);
}
public LastBlockInfo GetLastBlockInfo()
{
_logger.LogDebug("Getting last block info...");
string queryName = "get_last_block_info";
_logger.LogTrace("Invoking the '{0}' SPARQL query...", queryName);
string query = String.Format(_queryTemplatesService.GetQueryTemplate(queryName), _chainGraphIri);
var parser = new SparqlQueryParser();
SparqlQuery tupleQuery = parser.ParseFromString(query);
var processor = new LeviathanQueryProcessor(_repository);
var resultSet = processor.ProcessQuery(tupleQuery) as SparqlResultSet;
if (resultSet.IsEmpty)
{
return(null);
}
var bindingSet = resultSet.Results[0];
string lastBlockIri = bindingSet.Value("lastBlockIRI").ToString();
string lastBlockHash = (bindingSet.Value("lastBlockHash") as ILiteralNode).Value;
string lastBlockIndex = (bindingSet.Value("lastBlockIndex") as ILiteralNode).Value;
return(new LastBlockInfo(lastBlockIri, lastBlockHash, lastBlockIndex));
}
public void SparqlBindScope5()
{
String query = @"PREFIX : <http://example.org>
SELECT *
WHERE
{
GRAPH ?g { :s :p ?o }
BIND (?g AS ?in)
}";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
Console.WriteLine(q.ToString());
ISparqlAlgebra algebra = q.ToAlgebra();
Console.WriteLine(algebra.ToString());
Assert.IsInstanceOfType(algebra, typeof(Select));
algebra = ((IUnaryOperator)algebra).InnerAlgebra;
Assert.IsInstanceOfType(algebra, typeof(Extend));
}
/// <summary>
/// Processes a SPARQL Query against the Knowledge Base passing the results to the RDF or Results handler as appropriate
/// </summary>
/// <param name="rdfHandler">RDF Handler</param>
/// <param name="resultsHandler">Results Handler</param>
/// <param name="sparqlQuery">SPARQL Query</param>
/// <param name="callback">Callback to invoke once handling of results has completed</param>
/// <param name="state">State to pass to the callback</param>
public void Query(IRdfHandler rdfHandler, ISparqlResultsHandler resultsHandler, String sparqlQuery, QueryCallback callback, Object state)
{
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(sparqlQuery);
SparqlRemoteEndpoint endpoint = new SparqlRemoteEndpoint(UriFactory.Create(this._sparqlUri));
switch (q.QueryType)
{
case SparqlQueryType.Ask:
case SparqlQueryType.Select:
case SparqlQueryType.SelectAll:
case SparqlQueryType.SelectAllDistinct:
case SparqlQueryType.SelectAllReduced:
case SparqlQueryType.SelectDistinct:
case SparqlQueryType.SelectReduced:
endpoint.QueryWithResultSet(sparqlQuery, (rs, _) =>
{
resultsHandler.Apply(rs);
callback(rdfHandler, resultsHandler, state);
}, state);
break;
case SparqlQueryType.Construct:
case SparqlQueryType.Describe:
case SparqlQueryType.DescribeAll:
endpoint.QueryWithResultGraph(sparqlQuery, (g, _) =>
{
rdfHandler.Apply(g);
callback(rdfHandler, resultsHandler, state);
}, state);
break;
default:
throw new RdfQueryException("Cannot execute unknown query types against Pellet Server");
}
}
