VirtJenaSPARQLExample1 Virtuoso Jena Provider - SPARQL Example 1 Virtuoso Jena Provider - SPARQL Example 1 import com.hp.hpl.jena.query.*; import com.hp.hpl.jena.rdf.model.RDFNode; import virtuoso.jena.driver.*; public class VirtuosoSPARQLExample1 { /** * Executes a SPARQL query against a virtuoso url and prints results. */ public static void main(String[] args) { String url; if(args.length == 0) url = "jdbc:virtuoso://localhost:1111"; else url = args[0]; /* STEP 1 */ VirtGraph set = new VirtGraph (url, "dba", "dba"); /* STEP 2 */ /* STEP 3 */ /* Select all data in virtuoso */ Query sparql = QueryFactory.create("SELECT * WHERE { GRAPH ?graph { ?s ?p ?o } } limit 100"); /* STEP 4 */ VirtuosoQueryExecution vqe = VirtuosoQueryExecutionFactory.create (sparql, set); ResultSet results = vqe.execSelect(); while (results.hasNext()) { QuerySolution result = results.nextSolution(); RDFNode graph = result.get("graph"); RDFNode s = result.get("s"); RDFNode p = result.get("p"); RDFNode o = result.get("o"); System.out.println(graph + " { " + s + " " + p + " " + o + " . }"); } } }