jena.query.ResultSet.hasNext takes a long time in OntologyModelService.expandConcepts

[taojing2002]

In the dev cluster the jena.query.ResultSet.hasNext method takes about four seconds to finish. However, the second time to insert the same document, it almost takes 0 second to finish it. Somehow, there is a cache system there. The code looks like:

        Query query = QueryFactory.create(q);
        QueryExecution qexec = QueryExecutionFactory.create(query, ontModel);
        ResultSet results = qexec.execSelect();
        String name = field.getName();
        Set<String> values = new HashSet<String>();
         // results.hasNext() takes a long time
        while (results.hasNext()) {
          QuerySolution solution = results.next();

[artntek]

added to #34 and closed