C# (CSharp) VDS.RDF.Query.LeviathanQueryProcessor示例

示例#1

文件： SparqlResultDataObjectHelper.cs 项目： GTuritto/BrightstarDB

        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);
                }
            }
        } 

示例#2

        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));
                }
            }
        }