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Location: / Dashboard / Main / VOSIndex / VOSRDFDataProviders / VirtJenaProvider / VirtJenaSPARQLExample4

Virtuoso Jena Provider - SPARQL Example 4

import java.util.*;

import com.hp.hpl.jena.query.*;
import com.hp.hpl.jena.rdf.model.RDFNode;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.graph.Triple;

import virtuoso.jena.driver.*;

public class VirtuosoSPARQLExample4
{
    public static void main(String[] args)
    {
	String url;
	if(args.length == 0)
	    url = "jdbc:virtuoso://localhost:1111";
	else
	    url = args[0];

	Node foo1 = Node.createURI("http://example.org/#foo1");
	Node bar1 = Node.createURI("http://example.org/#bar1");
	Node baz1 = Node.createURI("http://example.org/#baz1");

	Node foo2 = Node.createURI("http://example.org/#foo2");
	Node bar2 = Node.createURI("http://example.org/#bar2");
	Node baz2 = Node.createURI("http://example.org/#baz2");

	Node foo3 = Node.createURI("http://example.org/#foo3");
	Node bar3 = Node.createURI("http://example.org/#bar3");
	Node baz3 = Node.createURI("http://example.org/#baz3");

	VirtGraph graph = new VirtGraph ("Example4", url, "dba", "dba");

	graph.clear ();

	System.out.println("graph.isEmpty() = " + graph.isEmpty());

	System.out.println("Add 3 triples to graph <Example4>.");

	graph.add(new Triple(foo1, bar1, baz1));
	graph.add(new Triple(foo2, bar2, baz2));
	graph.add(new Triple(foo3, bar3, baz3));

	System.out.println("graph.isEmpty() = " + graph.isEmpty());
	System.out.println("graph.getCount() = " + graph.getCount());

	System.out.println ( "graph.contains(new Triple(foo2, bar2, baz2) - " 
                             + graph.contains(new Triple(foo2, bar2, baz2)) 
                           );
	System.out.println ( "graph.contains(new Triple(foo2, bar2, baz3) - " 
                             + graph.contains(new Triple(foo2, bar2, baz3)) 
                           );

	graph.clear ();
    }
}
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