private String toString(TupleQueryResult results)
throws QueryResultHandlerException, TupleQueryResultHandlerException,
QueryEvaluationException, UnsupportedEncodingException {
TupleQueryResultFormat format = getTupleFormat();
ByteArrayOutputStream out = new ByteArrayOutputStream(4096);
TupleQueryResultWriter writer = QueryResultIO.createTupleWriter(format, out);
writer.startDocument();
writer.startHeader();
writer.handleLinks(Arrays.<String>asList());
QueryResults.report(results, writer);
return out.toString("UTF-8");
}
@Override
public int runQueryDebug(Query q, int run, boolean showResult) throws Exception {
TupleQuery query = conn.prepareTupleQuery(QueryLanguage.SPARQL, q.getQuery());
TupleQueryResult res = (TupleQueryResult) query.evaluate();
int resCounter = 0;
TupleQueryResultWriter writer = null;
boolean writerStarted = false;
if (showResult) {
OutputStream results =
new FileOutputStream(
Config.getConfig().getBaseDir()
+ "/result/"
+ q.getIdentifier()
+ "_"
+ run
+ ".csv");
TupleQueryResultWriterFactory factory = new SPARQLResultsCSVWriterFactory();
writer = factory.getWriter(results);
}
while (res.hasNext()) {
if (isInterrupted()) throw new QueryEvaluationException("Thread has been interrupted.");
BindingSet bindings = res.next();
if (showResult) {
if (!writerStarted) {
writer.startQueryResult(res.getBindingNames());
writerStarted = true;
}
writer.handleSolution(bindings);
}
resCounter++;
earlyResults.handleResult(bindings, resCounter);
}
if (writerStarted) writer.endQueryResult();
return resCounter;
}