VOS.VirtJenaSPARQLExample8

import org.apache.jena.query.*;
import org.apache.jena.rdf.model.RDFNode;

import virtuoso.jena.driver.*;

public class VirtuosoSPARQLExample8 {

	/**
	 * 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			*/
System.out.println("\nexecute: CLEAR GRAPH <http://test1>");
                String str = "CLEAR GRAPH <http://test1>";
                VirtuosoUpdateRequest vur = VirtuosoUpdateFactory.create(str, set);
                vur.exec();                  

System.out.println("\nexecute: INSERT INTO GRAPH <http://test1> { <aa> <bb> 'cc' . <aa1> <bb1> 123. }");
                str = "INSERT INTO GRAPH <http://test1> { <aa> <bb> 'cc' . <aa1> <bb1> 123. }";
                vur = VirtuosoUpdateFactory.create(str, set);
                vur.exec();                  

/*			STEP 3			*/
/*		Select all data in virtuoso	*/
System.out.println("\nexecute: SELECT * FROM <http://test1> WHERE { ?s ?p ?o }");
		Query sparql = QueryFactory.create("SELECT * FROM <http://test1> WHERE { ?s ?p ?o }");

/*			STEP 4			*/
		QueryExecution vqe = VirtuosoQueryExecutionFactory.create (sparql, set);

		ResultSet results = vqe.execSelect();
		while (results.hasNext()) {
			QuerySolution rs = results.nextSolution();
		    RDFNode s = rs.get("s");
		    RDFNode p = rs.get("p");
		    RDFNode o = rs.get("o");
		    System.out.println(" { " + s + " " + p + " " + o + " . }");
		}


System.out.println("\nexecute: DELETE FROM GRAPH <http://test1> { <aa> <bb> 'cc' }");
                str = "DELETE FROM GRAPH <http://test1> { <aa> <bb> 'cc' }";
                vur = VirtuosoUpdateFactory.create(str, set);
                vur.exec();                  

System.out.println("\nexecute: SELECT * FROM <http://test1> WHERE { ?s ?p ?o }");
		vqe = VirtuosoQueryExecutionFactory.create (sparql, set);
                results = vqe.execSelect();
		while (results.hasNext()) {
			QuerySolution rs = results.nextSolution();
		    RDFNode s = rs.get("s");
		    RDFNode p = rs.get("p");
		    RDFNode o = rs.get("o");
		    System.out.println(" { " + s + " " + p + " " + o + " . }");
		}

	
	}
}