Hi Holger,
Thanks for your reply.
I need some calcification to execute SPIN function, please refer TYPE 3.
On Wednesday, 15 May 2013 06:08:38 UTC+5:30, Holger Knublauch wrote:
>
> Hi Leo,
>
> On 5/14/2013 21:17, Leo Anbarasan wrote:
>
> I have tried many options to execute user defined SPIN functions. But i
> could not succeed.
>
> *SPIN Function*:
>
> SELECT ?users
> WHERE {
> {
> SELECT ((GROUP_CONCAT(DISTINCT ?user; SEPARATOR=',')) AS ?users)
> WHERE {
> ?user a :Person .
> ?user :accountAge ?age .
> FILTER (?age <= 10) .
> }
> } .
> }
>
> *SPARQL Query:*
>
> SELECT (<http://www.semanticweb.org/socure.me/activityOntology#InvalidUser>()
> AS ?u) {}
>
> It works fine in TopBraid Composer. But doesn't work in coding.
>
> I have tried in 4 methods and everything returns empty result. They are,
>
> // TYPE 1
> registry.registerAll(model, null);
> String str = "SELECT ?x WHERE { BIND (<
> http://topbraid.org/sparqlmotionfunctions#parseDate>('12/3/11','MM/dd/
> yy') as ?x) }";
> QueryExecution exec = QueryExecutionFactory.create(str, model);
>
> ResultSet resultSet = exec.execSelect();
> ResultSetFormatter.out(resultSet);
>
>
> The smf:parseDate function is not part of the SPIN API, and only works
> inside of TopBraid products.
>
>
>
> // TYPE 2
> Resource queryResource = model.listStatements(null, RDF.type,
> SP.Select).next().getSubject();
> Select selectQuery = (Select) SPINFactory.asQuery(queryResource);
>
> List<Resource> res = selectQuery.getResultVariables();
> System.out.println(res.get(0).toString());
>
>
> What is wrong with this example? The code above is just iterating over all
> Select query declarations in SPIN RDF syntax, but doesn't execute them.
> Note that SELECT * may not have any result variables, so res.get(0) seems
> unsafe.
>
>
> // TYPE 3
> Function function = registry.getFunction("
> http://www.semanticweb.org/socure.me/activityOntology#InvalidUser";,
> model);
> registry.registerFunctions(model, function);
>
>
> I assume you are calling something like in the OWLRLExample:
>
> // Register any new functions defined in OWL RL
> SPINModuleRegistry.get().registerAll(owlrlModel, null);
>
> on the correct input model (with imports etc)?
>
> String query = "SELECT (<
> http://www.semanticweb.org/socure.me/activityOntology#InvalidUser>() AS
> ?u) {}";
>
> QueryExecution exec = QueryExecutionFactory.create(query, model);
>
> ResultSet resultSet = exec.execSelect();
>
> System.out.println(resultSet.getRowNumber());
>
>
> Are you getting an error here? Something like missing function registry
> for your function? If the function is registered correctly then this should
> work. If not, maybe walk through the code in debugging mode to see why the
> SPIN API doesn't recognize your function.
>
>
This method return empty result. I have run this in topbraid composer. It
works fine and return a result. I am not sure about it in API. Could give
an example to execute SPIN function.
Awaiting for your reply.
Thanks,
Leo
> HTH
> Holger
>
>
>
>
> // TYPE 4
> Query arqQuery = new ARQFactory().createQuery(spinQuery);
>
> QueryExecution exec = QueryExecutionFactory.create(arqQuery,
> model);
>
> ResultSet resultSet = exec.execSelect();
>
> System.out.println(resultSet.getRowNumber());
>
>
> Type 1 is predefined function. Even that is returning empty result. I am
> not sure whether this is the correct methods.
>
> If someone could help me resolve this problem.
>
> Awaiting for your reply.
>
> Thanks
> ---
> Leo Anbarasan M
> India
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