C# Parsing.SparqlQueryParser类代码示例

        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");
            }
        }