public void SparqlBindLazy()
{
String query = "PREFIX fn: <" + XPathFunctionFactory.XPathFunctionsNamespace + "> SELECT ?triple WHERE { ?s ?p ?o . BIND(fn:concat(STR(?s), ' ', STR(?p), ' ', STR(?o)) AS ?triple) } LIMIT 1";
TripleStore store = new TripleStore();
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
store.Add(g);
SparqlQueryParser parser = new SparqlQueryParser();
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();
Object results = q.Evaluate(store);
if (results is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)results;
foreach (SparqlResult r in rset)
{
Console.WriteLine(r.ToString());
}
Assert.IsTrue(rset.Count == 1, "Expected exactly 1 results");
Assert.IsTrue(rset.All(r => r.HasValue("triple")), "All Results should have had a value for ?triple");
}
else
{
Assert.Fail("Expected a SPARQL Result Set");
}
}
public IEnumerable<IDataObject> BindRdfDataObjects(XDocument rdfXmlDocument,
IList<OrderingDirection> orderingDirections)
{
var g = new Graph();
#if PORTABLE || WINDOWS_PHONE
var parser = new RdfXmlParser(RdfXmlParserMode.Streaming);
// This is pretty nasty, having to deserialize only to go through parsing again
parser.Load(g, new System.IO.StringReader(rdfXmlDocument.ToString()));
#else
var parser = new RdfXmlParser(RdfXmlParserMode.DOM);
parser.Load(g, rdfXmlDocument.AsXmlDocument());
#endif
var p = new VDS.RDF.Query.LeviathanQueryProcessor(new InMemoryDataset(g));
var queryString = MakeOrderedResourceQuery(orderingDirections);
var sparqlParser = new SparqlQueryParser();
var query = sparqlParser.ParseFromString(queryString);
var queryResultSet = p.ProcessQuery(query) as VDS.RDF.Query.SparqlResultSet;
foreach (var row in queryResultSet.Results)
{
INode uriNode;
if (row.TryGetBoundValue("x", out uriNode) && uriNode is IUriNode)
{
yield return BindRdfDataObject(uriNode as IUriNode, g);
}
}
}
public void TestParser()
{
const string exp = "select ?t where { ?t a ?tt }";
var parser = new SparqlQueryParser();
var query = parser.ParseFromString(exp);
Assert.IsNotNull(query);
}
public void SparqlDefaultGraphExists3()
{
SqlDataset dataset = new SqlDataset(new MicrosoftSqlStoreManager("localhost", "unit_test", "example", "password"));
//Create Default Graph only if required
if (!dataset.HasGraph(null))
{
Graph g = new Graph();
g.Assert(g.CreateUriNode(new Uri("http://example.org/subject")), g.CreateUriNode(new Uri("http://example.org/predicate")), g.CreateUriNode(new Uri("http://example.org/object")));
dataset.AddGraph(g);
dataset.Flush();
}
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString("ASK WHERE { GRAPH ?g { ?s ?p ?o }}");
LeviathanQueryProcessor lvn = new LeviathanQueryProcessor(dataset);
Object results = lvn.ProcessQuery(q);
if (results is SparqlResultSet)
{
Assert.IsTrue(((SparqlResultSet)results).Result);
}
else
{
Assert.Fail("ASK Query did not return a SPARQL Result Set as expected");
}
dataset.Flush();
}
public void SparqlFunctionsIsNumeric()
{
Graph g = new Graph();
IUriNode subj = g.CreateUriNode(new Uri("http://example.org/subject"));
IUriNode pred = g.CreateUriNode(new Uri("http://example.org/predicate"));
g.Assert(subj, pred, (12).ToLiteral(g));
g.Assert(subj, pred, g.CreateLiteralNode("12"));
g.Assert(subj, pred, g.CreateLiteralNode("12", new Uri(XmlSpecsHelper.XmlSchemaDataTypeNonNegativeInteger)));
g.Assert(subj, pred, g.CreateLiteralNode("12", new Uri(XmlSpecsHelper.XmlSchemaDataTypeNonPositiveInteger)));
g.Assert(subj, pred, g.CreateLiteralNode("1200", new Uri(XmlSpecsHelper.XmlSchemaDataTypeByte)));
g.Assert(subj, pred, ((byte)50).ToLiteral(g));
g.Assert(subj, pred, g.CreateLiteralNode("-50", new Uri(XmlSpecsHelper.XmlSchemaDataTypeByte)));
g.Assert(subj, pred, g.CreateLiteralNode("-50", new Uri(XmlSpecsHelper.XmlSchemaDataTypeUnsignedByte)));
g.Assert(subj, pred, g.CreateUriNode(new Uri("http://example.org")));
TripleStore store = new TripleStore();
store.Add(g);
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString("SELECT ?obj (IsNumeric(?obj) AS ?IsNumeric) WHERE { ?s ?p ?obj }");
Object results = store.ExecuteQuery(q);
Assert.IsTrue(results is SparqlResultSet, "Result should be a SPARQL Result Set");
TestTools.ShowResults(results);
}
public fclsInspect(SparqlQuery query, long parseTime, String origQuery)
{
InitializeComponent();
this.lblParseTime.Text = "Took " + parseTime + "ms to parse";
this.txtQuery.Text = this._formatter.Format(query);
this.txtAlgebra.Text = query.ToAlgebra().ToString();
//Compute the actual syntax compatability
SparqlQueryParser parser = new SparqlQueryParser();
parser.SyntaxMode = SparqlQuerySyntax.Sparql_1_0;
try
{
SparqlQuery q = parser.ParseFromString(origQuery);
this.lblSyntaxCompatability.Text += " SPARQL 1.0 (Standard)";
}
catch
{
try
{
parser.SyntaxMode = SparqlQuerySyntax.Sparql_1_1;
SparqlQuery q = parser.ParseFromString(origQuery);
this.lblSyntaxCompatability.Text += " SPARQL 1.1 (Current Working Draft Standard)";
}
catch
{
parser.SyntaxMode = SparqlQuerySyntax.Extended;
SparqlQuery q = parser.ParseFromString(origQuery);
this.lblSyntaxCompatability.Text += " SPARQL 1.1 (Implementation specific extensions)";
}
}
}
public SparqlResult ExecuteQuery(SparqlQueryContext queryContext, IList<string> datasetGraphUris)
{
var parser = new SparqlQueryParser();
var query = parser.ParseFromString(queryContext.SparqlQuery);
var sparqlResults = _queryProcessor.ProcessQuery(query);
return new SparqlResult(sparqlResults, queryContext);
}
public void SparqlGroupByAssignmentExpression()
{
String query = "SELECT ?s ?sum WHERE { ?s ?p ?o } GROUP BY ?s (1 + 2 AS ?sum)";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
SparqlFormatter formatter = new SparqlFormatter();
Console.WriteLine(formatter.Format(q));
Console.WriteLine();
QueryableGraph g = new QueryableGraph();
FileLoader.Load(g, "InferenceTest.ttl");
Object results = g.ExecuteQuery(q);
if (results is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)results;
TestTools.ShowResults(rset);
Assert.IsTrue(rset.All(r => r.HasValue("s") && r.HasValue("sum")), "All Results should have a ?s and a ?sum variable");
}
else
{
Assert.Fail("Didn't get a Result Set as expected");
}
}
public void SparqlAlgebraReverseSimple()
{
List<String> tests = new List<string>()
{
"SELECT * WHERE { ?s ?p ?o }",
"SELECT ?s WHERE { ?s ?p ?o }",
"SELECT ?p ?o WHERE { ?s ?p ?o }",
"PREFIX fn: <" + XPathFunctionFactory.XPathFunctionsNamespace + "> SELECT (fn:concat(?s, ?p) AS ?string) WHERE {?s ?p ?o}",
"SELECT * WHERE {?s ?p ?o . ?o ?x ?y }",
"SELECT * WHERE {?s ?p ?o . OPTIONAL {?o ?x ?y} }",
"SELECT * WHERE {?s ?p ?o . OPTIONAL {?o ?x ?y . FILTER(BOUND(?s)) } }"
};
SparqlQueryParser parser = new SparqlQueryParser();
foreach (String test in tests)
{
Console.WriteLine("Test Input:");
Console.WriteLine(test);
Console.WriteLine();
Console.WriteLine("Parsed Query:");
SparqlQuery q = parser.ParseFromString(test);
Console.WriteLine(q.ToString());
Console.WriteLine();
Console.WriteLine("Algebra:");
Console.WriteLine(q.ToAlgebra().ToString());
Console.WriteLine();
Console.WriteLine("Algebra Reverse Transformed to Query:");
Console.WriteLine(q.ToAlgebra().ToQuery().ToString());
Console.WriteLine();
Console.WriteLine();
}
}
public void SparqlBind()
{
String query = "PREFIX fn: <" + XPathFunctionFactory.XPathFunctionsNamespace + "> SELECT ?triple WHERE { ?s ?p ?o . BIND(fn:concat(STR(?s), ' ', STR(?p), ' ', STR(?o)) AS ?triple) }";
TripleStore store = new TripleStore();
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
store.Add(g);
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
Object results = q.Evaluate(store);
if (results is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)results;
foreach (SparqlResult r in rset)
{
Console.WriteLine(r.ToString());
}
Assert.IsTrue(rset.Count > 0, "Expected 1 or more results");
}
else
{
Assert.Fail("Expected a SPARQL Result Set");
}
}
static object Execute(TripleStore store, string sparql)
{
InMemoryDataset ds = new InMemoryDataset(store);
ISparqlQueryProcessor processor = new LeviathanQueryProcessor(ds);
SparqlQueryParser sparqlparser = new SparqlQueryParser();
SparqlQuery query = sparqlparser.ParseFromString(sparql);
return processor.ProcessQuery(query);
}
/// <summary>
/// Creates a new SPARQL View
/// </summary>
/// <param name="sparqlQuery">SPARQL Query</param>
/// <param name="store">Triple Store to query</param>
public BaseSparqlView(String sparqlQuery, ITripleStore store)
{
SparqlQueryParser parser = new SparqlQueryParser();
this._q = parser.ParseFromString(sparqlQuery);
this._store = store;
this._async = new UpdateViewDelegate(this.UpdateViewInternal);
this.Initialise();
}
public void Setup()
{
this._parser = new SparqlQueryParser();
TripleStore store = new TripleStore();
Graph g = new Graph();
FileLoader.Load(g, "describe-algos.ttl");
store.Add(g);
this._data = new InMemoryDataset(store);
}
public static SparqlQuery ParseSparql(string exp)
{
var parser = new SparqlQueryParser(SparqlQuerySyntax.Extended);
var expressionFactories = parser.ExpressionFactories.ToList();
expressionFactories.Add(new BrightstarFunctionFactory());
parser.ExpressionFactories = expressionFactories;
var query = parser.ParseFromString(exp);
return query;
}
public void SparqlResultSetToDataTable2()
{
String query = "PREFIX ex: <http://example.org/vehicles/> SELECT * WHERE {?s a ex:Car . OPTIONAL { ?s ex:Speed ?speed }}";
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 = new DataTable();
foreach (String var in rset.Variables)
{
table.Columns.Add(new DataColumn(var, typeof(INode)));
}
foreach (SparqlResult r in rset)
{
DataRow row = table.NewRow();
foreach (String var in rset.Variables)
{
if (r.HasValue(var))
{
row[var] = r[var];
}
else
{
row[var] = null;
}
}
table.Rows.Add(row);
}
Assert.AreEqual(rset.Variables.Count(), table.Columns.Count, "Number of Columns should be equal");
Assert.AreEqual(rset.Count, table.Rows.Count, "Number of Rows should be equal");
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");
}
}
/// <summary>
/// Determines the type of model that will be returned by the specified SPARQL query
/// </summary>
/// <param name="sparqlQuery"></param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">raised if <paramref name="sparqlQuery"/> is NULL</exception>
/// <exception cref="ArgumentException">rasised if <paramref name="sparqlQuery"/> is an empty string</exception>
/// <exception cref="VDS.RDF.Parsing.RdfParseException">raised if the sparql query could not be parsed</exception>
public static SerializableModel GetResultModel(string sparqlQuery)
{
if (sparqlQuery == null) throw new ArgumentNullException("sparqlQuery", Strings.BrightstarServiceClient_QueryMustNotBeNull);
if (String.IsNullOrEmpty(sparqlQuery)) throw new ArgumentException(Strings.BrightstarServiceClient_QueryMustNotBeEmptyString, "sparqlQuery");
var p = new SparqlQueryParser();
var q = p.ParseFromString(sparqlQuery);
switch (q.QueryType)
{
case SparqlQueryType.Construct:
case SparqlQueryType.Describe:
case SparqlQueryType.DescribeAll:
return SerializableModel.RdfGraph;
default:
return SerializableModel.SparqlResultSet;
}
}
public void SparqlParsingNestedGraphPatternFirstItem2()
{
try
{
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromFile("childgraphpattern2.rq");
Console.WriteLine(q.ToString());
Console.WriteLine();
Console.WriteLine(q.ToAlgebra().ToString());
}
catch (RdfParseException parseEx)
{
TestTools.ReportError("Parsing Error", parseEx, true);
}
}
private static SparqlQuery ParseSparql(string exp)
{
var parser = new SparqlQueryParser(SparqlQuerySyntax.Extended);
var expressionFactories = parser.ExpressionFactories.ToList();
expressionFactories.Add(new BrightstarFunctionFactory());
parser.ExpressionFactories = expressionFactories;
lock (SparqlParserLock)
{
// Lock is required because dotNetRDF currently has
// a contention issue in its Trie implementation
// This may be fixed in 0.7.1
// TODO: Check if this is needed when we upgrade to 0.7.x
var query = parser.ParseFromString(exp);
return query;
}
}
public void SparqlServiceUsingDBPediaAndBindings()
{
String query = "SELECT * WHERE { SERVICE <http://dbpedia.org/sparql> { ?s a ?type } } BINDINGS ?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.Fail("Should have returned a SPARQL Result Set");
}
}
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.Fail("Should have errored");
}
catch (RdfQueryException queryEx)
{
Console.WriteLine("Errored as expected");
TestTools.ReportError("Query Error", queryEx, false);
}
}
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 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 SparqlParsingSubQueryWithLimitAndOrderBy()
{
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
String query = "SELECT * WHERE { { SELECT * WHERE {?s ?p ?o} ORDER BY ?p ?o LIMIT 2 } }";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
Object results = g.ExecuteQuery(q);
if (results is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)results;
TestTools.ShowResults(rset);
Assert.IsTrue(rset.All(r => r.HasValue("s") && r.HasValue("p") && r.HasValue("o")), "All Results should have had ?s, ?p and ?o variables");
}
else
{
Assert.Fail("Expected a SPARQL Result Set");
}
}
public Stream ExecuteQuery(string queryExpression, IList<string> datasetGraphUris)
{
var parser = new SparqlQueryParser();
var query = parser.ParseFromString(queryExpression);
var sparqlResults = _queryProcessor.ProcessQuery(query);
var memoryStream = new MemoryStream();
using (var streamWriter = new StreamWriter(memoryStream, Encoding.UTF8))
{
if (sparqlResults is SparqlResultSet)
{
var resultSet = sparqlResults as SparqlResultSet;
var writer = new SparqlXmlWriter();
writer.Save(resultSet, streamWriter);
}
else if (sparqlResults is IGraph)
{
var g = sparqlResults as IGraph;
var writer = new RdfXmlWriter();
writer.Save(g, streamWriter);
}
}
return new MemoryStream(memoryStream.ToArray());
//return new MemoryStream(Encoding.UTF8.GetBytes(buff.ToString()), false);
}
public void SparqlFunctionsNow()
{
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromFile("now01.rq");
Console.WriteLine("ToString Output:");
Console.WriteLine(q.ToString());
Console.WriteLine();
SparqlFormatter formatter = new SparqlFormatter();
Console.WriteLine("SparqlFormatter Output:");
Console.WriteLine(formatter.Format(q));
TripleStore store = new TripleStore();
SparqlResultSet results = q.Evaluate(store) as SparqlResultSet;
if (results != null)
{
Assert.IsTrue(results.Result, "Result should be true");
}
else
{
Assert.Fail("Expected a non-null result");
}
}
public void SparqlFilterOptionalNotBound()
{
Graph g = new Graph();
g.LoadFromEmbeddedResource("VDS.RDF.Configuration.configuration.ttl");
SparqlParameterizedString query = new SparqlParameterizedString();
query.Namespaces.AddNamespace("rdf", new Uri(NamespaceMapper.RDF));
query.Namespaces.AddNamespace("rdfs", new Uri(NamespaceMapper.RDFS));
query.CommandText = "SELECT * WHERE { ?property a rdf:Property . OPTIONAL { ?property rdfs:range ?range } FILTER (!BOUND(?range)) }";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
SparqlResultSet results = g.ExecuteQuery(q) as SparqlResultSet;
if (results != null)
{
TestTools.ShowResults(results);
Assert.IsTrue(results.All(r => !r.HasValue("range") || r["range"] == null), "There should be no values for ?range returned");
}
else
{
Assert.Fail("Did not get a SparqlResultSet as expected");
}
}
/// <summary>
/// Attempt to auto-detect the syntax of the current document using the filename as a guide
/// </summary>
public void AutoDetectSyntax(String filename)
{
if (this._editor == null) return; //Not yet ready
if (filename == null || System.IO.Path.GetExtension(filename).Equals(String.Empty))
{
try
{
//First see if it's an RDF format
IRdfReader parser = StringParser.GetParser(this._editor.Text);
if (parser is NTriplesParser)
{
//NTriples is the fallback so if we get this check if it's actually SPARQL Results
try
{
ISparqlResultsReader sparqlParser = StringParser.GetResultSetParser(this._editor.Text);
}
catch (RdfParserSelectionException)
{
//Not a valid SPARQL Results format - may be a SPARQL Query or a SPARQL Update?
SparqlQueryParser queryParser = new SparqlQueryParser(SparqlQuerySyntax.Sparql_1_1);
try
{
SparqlQuery q = queryParser.ParseFromString(this._editor.Text);
this.SetHighlighter("SparqlQuery11");
}
catch (RdfParseException)
{
//Not a valid SPARQL Query - valid SPARQL Update?
SparqlUpdateParser updateParser = new SparqlUpdateParser();
try
{
SparqlUpdateCommandSet cmds = updateParser.ParseFromString(this._editor.Text);
this.SetHighlighter("SparqlUpdate11");
}
catch (RdfParseException)
{
//Was probably actually NTriples
this.SetHighlighter(parser);
}
}
}
}
else
{
//Got a non NTriples RDF parser so use that to set Highlighter
this.SetHighlighter(parser);
}
}
catch (RdfParserSelectionException)
{
this.SetNoHighlighting();
}
return;
}
try
{
IHighlightingDefinition def = HighlightingManager.Instance.GetDefinitionByExtension(System.IO.Path.GetExtension(filename));
if (this._enableHighlighting) this._editor.SyntaxHighlighting = def;
if (def != null)
{
this._currSyntax = def.Name;
this.SetCurrentHighlighterChecked(def.Name);
this.SetCurrentValidator(def.Name);
this.SetCurrentAutoCompleter(def.Name);
}
else
{
this.SetNoHighlighting();
}
}
catch
{
this.SetNoHighlighting();
}
}
public void SparqlBgpEvaluation()
{
//Prepare the Store
TripleStore store = new TripleStore();
Graph g = new Graph();
FileLoader.Load(g, "Turtle.ttl");
store.Add(g);
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(@"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT * WHERE {?s ?p ?o . ?s rdfs:label ?label}");
Object testResult = store.ExecuteQuery(q);
ISparqlAlgebra testAlgebra = q.ToAlgebra();
if (testResult is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)testResult;
Console.WriteLine(rset.Count + " Results");
foreach (SparqlResult r in rset)
{
Console.WriteLine(r.ToString());
}
Console.WriteLine();
}
//Create some Triple Patterns
TriplePattern t1 = new TriplePattern(new VariablePattern("?s"), new VariablePattern("?p"), new VariablePattern("?o"));
TriplePattern t2 = new TriplePattern(new VariablePattern("?s"), new NodeMatchPattern(g.CreateUriNode("rdfs:label")), new VariablePattern("?label"));
TriplePattern t3 = new TriplePattern(new VariablePattern("?x"), new VariablePattern("?y"), new VariablePattern("?z"));
TriplePattern t4 = new TriplePattern(new VariablePattern("?s"), new NodeMatchPattern(g.CreateUriNode(":name")), new VariablePattern("?name"));
//Build some BGPs
Bgp selectNothing = new Bgp();
Bgp selectAll = new Bgp(t1);
Bgp selectLabelled = new Bgp(new List<ITriplePattern>() { t1, t2 });
Bgp selectAllDisjoint = new Bgp(new List<ITriplePattern>() { t1, t3 });
Bgp selectLabels = new Bgp(t2);
Bgp selectNames = new Bgp(t4);
//LeftJoin selectOptionalNamed = new LeftJoin(selectAll, new Optional(selectNames));
LeftJoin selectOptionalNamed = new LeftJoin(selectAll, selectNames);
Union selectAllUnion = new Union(selectAll, selectAll);
Union selectAllUnion2 = new Union(selectAllUnion, selectAll);
Filter selectAllUriObjects = new Filter(selectAll, new UnaryExpressionFilter(new IsUriFunction(new VariableExpressionTerm("o"))));
//Test out the BGPs
//Console.WriteLine("{}");
//this.ShowMultiset(selectNothing.Evaluate(new SparqlEvaluationContext(null, store)));
//Console.WriteLine("{?s ?p ?o}");
//this.ShowMultiset(selectAll.Evaluate(new SparqlEvaluationContext(null, store)));
//Console.WriteLine("{?s ?p ?o . ?s rdfs:label ?label}");
//SparqlEvaluationContext context = new SparqlEvaluationContext(null, store);
//this.ShowMultiset(selectLabelled.Evaluate(context));
//SparqlResultSet lvnResult = new SparqlResultSet(context);
//Console.WriteLine("{?s ?p ?o . ?x ?y ?z}");
//this.ShowMultiset(selectAllDisjoint.Evaluate(new SparqlEvaluationContext(null, store)));
//Console.WriteLine("{?s ?p ?o . OPTIONAL {?s :name ?name}}");
//this.ShowMultiset(selectOptionalNamed.Evaluate(new SparqlEvaluationContext(null, store)));
Console.WriteLine("{{?s ?p ?o} UNION {?s ?p ?o}}");
this.ShowMultiset(selectAllUnion.Evaluate(new SparqlEvaluationContext(null, new InMemoryDataset(store))));
Console.WriteLine("{{?s ?p ?o} UNION {?s ?p ?o} UNION {?s ?p ?o}}");
this.ShowMultiset(selectAllUnion2.Evaluate(new SparqlEvaluationContext(null, new InMemoryDataset(store))));
Console.WriteLine("{?s ?p ?o FILTER (ISURI(?o))}");
this.ShowMultiset(selectAllUriObjects.Evaluate(new SparqlEvaluationContext(null, new InMemoryDataset(store))));
}
public void SparqlPropertyPathParser()
{
//Load our test data
TripleStore store = new TripleStore();
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
store.Add(g);
List<String> testQueries = new List<string>();
String rdfsPrefix = "PREFIX rdfs: <" + NamespaceMapper.RDFS + ">\n";
//Cardinality Paths
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf* <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf+ <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf? <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf{2,4} <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf{2,} <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf{,4} <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf{2} <http://example.org/vehicles/Vehicle>}");
//Simple Inverse Paths
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?type ^a ?entity}");
//Sequence Paths
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf / rdfs:subClassOf <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf{2} / rdfs:subClassOf <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf / rdfs:subClassOf{2} <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass a / rdfs:subClassOf <http://example.org/vehicles/Plane>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?vehicle a ^ rdfs:subClassOf <http://example.org/vehicles/Plane>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass a / ^ rdfs:subClassOf <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?entity a ^ a ?type}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?entity a ^ a / rdfs:subClassOf <http://example.org/vehicles/GroundVehicle>}");
//Alternative Paths
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf | a <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass (rdfs:subClassOf | a) | rdfs:someProperty <http://example.org/vehicles/Vehicle>}");
testQueries.Add(rdfsPrefix + "SELECT * WHERE {?subclass rdfs:subClassOf | a | rdfs:someProperty <http://example.org/vehicles/Vehicle>}");
SparqlQueryParser parser = new SparqlQueryParser();
foreach (String query in testQueries)
{
//Parse the Query and output to console
SparqlQuery q = parser.ParseFromString(query);
Console.WriteLine(q.ToString());
//Now we'll try and evaluate it (if this is possible)
try
{
Object results = store.ExecuteQuery(q);
Console.WriteLine("Evaluated OK");
TestTools.ShowResults(results);
Console.WriteLine();
}
catch (RdfQueryException queryEx)
{
Console.WriteLine("Unable to evaluate:");
Console.WriteLine(queryEx.Message);
Console.WriteLine(queryEx.StackTrace);
}
}
}
/// <summary>
/// Executes a SPARQL Query on the Triple Store processing the results with an appropriate handler from those provided
/// </summary>
/// <param name="rdfHandler">RDF Handler</param>
/// <param name="resultsHandler">Results Handler</param>
/// <param name="query">SPARQL Query as unparsed String</param>
public virtual void ExecuteQuery(IRdfHandler rdfHandler, ISparqlResultsHandler resultsHandler, String query)
{
//Parse the Query
SparqlQueryParser sparqlparser = new SparqlQueryParser();
SparqlQuery q = sparqlparser.ParseFromString(query);
//Invoke other execute method
this.ExecuteQuery(rdfHandler, resultsHandler, q);
}
