[Virtuoso-users] Literal with xml:lang through jdbc problem

[Lourens van der Meij]

I tried getting RDF results of a query through JAVA. I used the
jdbc example occurring in the Virtuoso documentation, but Literals with
xml:lang specification return as java String.
The drivers I tested:
* recent virtjdbc3.jar (ftp'd just now)
 OpenLink Virtuoso(TM) Driver for JDBC(TM) Version 3.x [Build 3.35]
* The virtjdbc3.jar that came with the 6.0 windows binary installation:
 OpenLink Virtuoso(TM) Driver for JDBC(TM) Version 3.x [Build 
3.27/06.00.3039]

 The virtuoso version is 6.0.0-pre2.3118-threads as of Apr 23 2009 
(downloaded from virtuoso site)

 My query is:
"sparql SELECT ?l ?u where {?u skos:prefLabel 
?l.FILTER(langmatches(lang(?l),\"nl\"))} LIMIT 10";
      
 I get results:
 "Populaire" genres en vormen
<http://www.oclc.org/nl/kar/Mp>

I did have to specify:-Djdbc.drivers=virtuoso.jdbc3.Driver in java as 
otherwise
the driver was not found. The
Object o = ((VirtuosoResultSet)rs).getObject(i);
returns a java String for Literals, apparently even if the literal has 
an xml:lang attribute.

Am I missing something?
Any advice? Should I use the higher level interfaces to java?

=================
The code:
import java.sql.*;
import virtuoso.jdbc3.*;

public class TestVirtuosoRDFBare {
   public static void main(String[] args) throws SQLException {
       String connectionURL = 
"jdbc:virtuoso://localhost:1111/UID=demo/PWD=demo";
       Connection connection = DriverManager.getConnection(connectionURL);
       Statement stmt = connection.createStatement();
       String query = "sparql SELECT ?l ?u where {?u skos:prefLabel 
?l.FILTER(langmatches(lang(?l),\"nl\"))} LIMIT 10";
       boolean more = stmt.execute(query);
       ResultSetMetaData data = stmt.getResultSet().getMetaData();
       while (more) {
           ResultSet rs = stmt.getResultSet();
           while(rs.next()){
               for(int i = 1;i <= data.getColumnCount();i++) {
                   String s = rs.getString(i);
                   Object o = ((VirtuosoResultSet)rs).getObject(i);
                   if (o instanceof VirtuosoExtendedString) // String 
representing an IRI
                   {
                       VirtuosoExtendedString vs = 
(VirtuosoExtendedString) o;
                       if (vs.iriType == VirtuosoExtendedString.IRI)
                           System.out.println ("<" + vs.str +">");
                       else if (vs.iriType == VirtuosoExtendedString.BNODE)
                           System.out.println ("<" + vs.str +">");
                   }
                   else if (o instanceof VirtuosoRdfBox) // Typed literal
                   {
                       VirtuosoRdfBox rb = (VirtuosoRdfBox) o;
                       System.out.println (rb.rb_box + " lang=" + 
rb.getLang() + " type=" + rb.getType());

                   }
                   else if(stmt.getResultSet().wasNull())
                       System.out.println("NULL");
                   else {
                       System.out.println(s);
                   }
               }
           }
           more = stmt.getMoreResults();
       }
       connection.close();
   }
}