@SuppressWarnings("rawtypes")
public Object find(String uri) {
SelectQuery q = new SelectQuery();
Variable x = new Variable("x");
q.addTriplePattern(new TriplePattern(x, new AbbrevRdfType(), new Variable("type")));
q.addFilter("str(" + x.toString() +") = \"" + uri + "\"");
QueryCodeGenerator qg = new QueryCodeGenerator();
qg.visit(q);
QueryExecutor qe = this.session.getQueryExecutor();
ResultSet rs = qe.execSelect(qg.toString());
RDFMetaResource metaResource = new RDFMetaResource(Object.class);