public object Search(queryrequest xml) { SemWeb.Query.Query query = null; string q = string.Empty; try { query = new SparqlEngine(new StringReader(xml.query)); } catch (QueryFormatException ex) { var malformed = new malformedquery(); malformed.faultdetails = ex.Message; return(malformed); } // Load the data from sql server SemWeb.Stores.SQLStore store; string connstr = ConfigurationManager.ConnectionStrings["SemWebDB"].ConnectionString; DebugLogging.Log(connstr); store = (SemWeb.Stores.SQLStore)SemWeb.Store.CreateForInput(connstr); //Create a Sink for the results to be writen once the query is run. MemoryStream ms = new MemoryStream(); XmlTextWriter writer = new XmlTextWriter(ms, System.Text.Encoding.UTF8); QueryResultSink sink = new SparqlXmlQuerySink(writer); try { // Run the query. query.Run(store, sink); } catch (Exception ex) { // Run the query. query.Run(store, sink); DebugLogging.Log("Run the query a second time"); DebugLogging.Log(ex.Message); } //flush the writer then load the memory stream writer.Flush(); ms.Seek(0, SeekOrigin.Begin); //Write the memory stream out to the response. ASCIIEncoding ascii = new ASCIIEncoding(); DebugLogging.Log(ascii.GetString(ms.ToArray()).Replace("???", "")); writer.Close(); DebugLogging.Log("End of Processing"); return(SerializeXML.DeserializeObject(ascii.GetString(ms.ToArray()).Replace("???", ""), typeof(sparql)) as sparql); }
public static void Main(string[] argv) { if (argv.Length < 3) { Console.WriteLine("Usage: query.exe format queryfile datafile"); return; } string format = argv[0]; string queryfile = argv[1]; string datafile = argv[2]; Query query; if (format == "rsquary") { // Create a simple-entailment "RSquary" query // from the N3 file. query = new GraphMatch(new N3Reader(queryfile)); } else { // Create a SPARQL query by reading the file's // contents. query = new SparqlEngine(new StreamReader(queryfile)); } // Load the data file from disk MemoryStore data = new MemoryStore(); data.Import(new N3Reader(datafile)); // First, print results in SPARQL XML Results format... // Create a result sink where results are written to. QueryResultSink sink = new SparqlXmlQuerySink(Console.Out); // Run the query. query.Run(data, sink); // Second, print the results via our own custom QueryResultSink... query.Run(data, new PrintQuerySink()); }
protected override void OnLoad(EventArgs e) { RdfStore = new MemoryStore(); RdfStore.Import( new RdfXmlReader(@"c:\temp\_1.rdf")); string depRules = @" @prefix n: <urn:schemas-nreco:metadata:terms#>. @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>. @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>. { ?a n:dependentFrom ?b . ?b n:dependentFrom ?c .} => {?a n:dependentFrom ?c}. { ?a n:dependentFrom ?b } => { ?b n:usedBy ?a}. { ?a n:usedBy ?b . ?b n:usedBy ?c .} => {?a n:usedBy ?c}. "; Euler engine = new Euler(new N3Reader(new StringReader(depRules))); RdfStore.AddReasoner(new RDFS(RdfStore)); RdfStore.AddReasoner(engine); string rdfQuery = @" @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>. @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>. @prefix p: <urn:schemas-nreco:metadata:dotnet:property#>. @prefix t: <urn:schemas-nreco:metadata:dotnet:type#>. @prefix w: <file:///d:/Vitalik/GoogleCode/NReco/examples/NReco.Examples.WebApp/web/#>. @prefix cso: <http://cos.ontoware.org/cso#>. @prefix n: <urn:schemas-nreco:metadata:terms#>. w:db n:usedBy ?t2. "; Query query = new GraphMatch(new N3Reader(new StringReader(rdfQuery))); StringWriter wr = new StringWriter(); QueryResultSink sink = new SparqlXmlQuerySink(wr); query.Run(RdfStore, sink); Result = wr.ToString(); base.OnLoad(e); }
public static void Main(string[] args) { System.Net.ServicePointManager.Expect100Continue = false; Opts opts = new Opts(); opts.ProcessArgs(args); if (opts.RemainingArguments.Length != 1) { opts.DoHelp(); return; } string baseuri = "query://query/#"; QueryResultSink qs; if (opts.format == "simple") { qs = new PrintQuerySink(); } else if (opts.format == "html") { qs = new HTMLQuerySink(Console.Out); } else if (opts.format == "xml") { qs = new SparqlXmlQuerySink(Console.Out); } else if (opts.format == "lubm") { qs = new LUBMReferenceAnswerOutputQuerySink(); } else if (opts.format == "csv") { qs = new CSVQuerySink(); } else { Console.Error.WriteLine("Invalid output format."); return; } Query query; MemoryStore queryModel = null; #if !DOTNET2 System.Collections.ICollection queryModelVars = null; #else System.Collections.Generic.ICollection <Variable> queryModelVars = null; #endif Store model = Store.Create(opts.RemainingArguments[0]); if (opts.type == "rsquary") { RdfReader queryparser = RdfReader.Create("n3", "-"); queryparser.BaseUri = baseuri; queryModel = new MemoryStore(queryparser); queryModelVars = queryparser.Variables; query = new GraphMatch(queryModel); } else if (opts.type == "sparql" && model.DataSources.Count == 1 && model.DataSources[0] is SemWeb.Remote.SparqlSource) { string querystring = Console.In.ReadToEnd(); ((SemWeb.Remote.SparqlSource)model.DataSources[0]).RunSparqlQuery(querystring, Console.Out); return; } else if (opts.type == "sparql") { string querystring = Console.In.ReadToEnd(); query = new SparqlEngine(querystring); } else { throw new Exception("Invalid query format: " + opts.type); } if (opts.limit > 0) { query.ReturnLimit = opts.limit; } //Console.Error.WriteLine(query.GetExplanation()); if (query is SparqlEngine && ((SparqlEngine)query).Type != SparqlEngine.QueryType.Select) { SparqlEngine sparql = (SparqlEngine)query; sparql.Run(model, Console.Out); } else if (model is QueryableSource && queryModel != null) { SemWeb.Query.QueryOptions qopts = new SemWeb.Query.QueryOptions(); qopts.DistinguishedVariables = queryModelVars; // Replace bnodes in the query with Variables int bnodectr = 0; foreach (Entity e in queryModel.GetEntities()) { if (e is BNode && !(e is Variable)) { BNode b = (BNode)e; queryModel.Replace(e, new Variable(b.LocalName != null ? b.LocalName : "bnodevar" + (++bnodectr))); } } model.Query(queryModel.ToArray(), qopts, qs); } else { query.Run(model, qs); } if (qs is IDisposable) { ((IDisposable)qs).Dispose(); } }