So my solution for my own problem ;)
String prefix = "PREFIX siocNS: <http://rdfs.org/sioc/ns#>\n"
+ "PREFIX rdfPred: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n"
+ "PREFIX purlPred: <http://purl.org/dc/terms/>\n"
+ "PREFIX purlPredLecture: <http://purl.org/<CENSORED>/lecture/>\n";
String queryString = "select ?post ?title ?content ?time ?creator where\n"
+ "{\n"
+ "?post rdfPred:type siocNS:Post.\n"
+ "?post purlPred:title ?title. \n"
+ "?post purlPred:content ?content. \n"
+ "?post purlPred:created ?time. \n"
+ "?post purlPred:creator ?creator.\n"
+ "?post purlPred:context purlPredLecture:"
+ lectureID + ".\n" + "}";
logger.info("Created Query:" + prefix + queryString);
String completeQuery = prefix + queryString;
logger.info("Created Query:\n" + completeQuery);
RepositoryConnection con = createRepositoryConnection();
if (con == null) {
logger.warn("Error creating repository connection. Returning epty list");
return new ArrayList<UserMessage>();
}
ArrayList<UserMessage> messages = new ArrayList<UserMessage>();
try {
try {
TupleQuery prepareTupleQuery = con
.prepareTupleQuery(
QueryLanguage.SPARQL,
completeQuery);
TupleQueryResult result = prepareTupleQuery
.evaluate();
while (result.hasNext()) {
...
}
for (UserMessage message : messages) {
collectReplysOfMessage(lectureID,
message.getId());
}
} catch (MalformedQueryException e) {
logger.error("Malformed Exception caught",
e);
} catch (QueryEvaluationException e) {
logger.error(
"Error on evaluating the query", e);
} finally {
con.close();
}
} catch (RepositoryException e) {
logger.error(
"Error on creationg repository connection",
e);
}
Where 'createRepositoryConnection()' looks like
private static RepositoryConnection createRepositoryConnection() {
if (repoistory == null) {
prepareRepository();
}
RepositoryConnection con = null;
try {
con = repoistory.getConnection();
} catch (RepositoryException e) {
logger.error(
"Error on creating repository connection",
e);
}
return con;
}