Thanks so much for your prompt response, Holger. After taking a
closer look at the API and [1], I was able to query with a couple of
SPIN templates. Thank you!
In case this helps anyone, here's the (edited) code I used to call a
SPIN template that wraps a SPARQL SELECT query and that takes one
argument:
String NS = "http://example.org/Test#";;
OntResource r = ontModel.getOntResource(NS + "nameOfTemplate");
Query q = ARQFactory.get().createQuery((Select)
(SPINFactory.asTemplate(r).getBody()));
QueryExecution qexec = ARQFactory.get().createQueryExecution(q,
ontModel);
QuerySolutionMap varBindings = new QuerySolutionMap();
RDFNode arg1 = ontModel.getOntResource(NS + "myInputArgument");
varBindings.add("arg1", arg1);
qexec.setInitialBinding(varBindings);
ResultSet results = qexec.execSelect();
ResultSetFormatter.out(System.out, results);
[1]
http://groups.google.com/group/topbraid-users/browse_thread/thread/17d27cfc4d862ab6/9ed1c24e651d7a8b
Thanks again,
Brian
On Jan 26, 12:41 am, Holger Knublauch <[email protected]> wrote:
> On Jan 26, 2012, at 2:26 AM, Brian wrote:
>
> > Hi everyone:
>
> > I'm having some problems storing and retrieving SPARQL queries in/from
> > my RDF SPIN model. I would like to store a set of SPARQL queries in
> > my model and call them in my Java application to test for conditions
> > and to add triples on demand. I tried to attach a spin:query to a
> > resource, but the query was stored in a blank node. Can I access a
> > blank node resource as a SPIN query in my Java code?
>
> Yes, but you will need the SPIN API for that
>
> http://topbraid.org/spin/api/1.2.0/index.html
>
> Once you have the blank node, turn it into a Query instance using
> SPINFactory.asQuery()
>
> http://topbraid.org/spin/api/1.2.0/spin/apidocs/org/topbraid/spin/mod...)
>
> > Is there a way
> > to store named queries (e.g.http://example.org/MyProject#myQuery)?
>
> I would convert them to SPIN templates for that - this not only gives the
> query a URI but also allows you to pass in arguments and thus reuse the same
> query in different contexts.
>
> http://composing-the-semantic-web.blogspot.com/2009/01/understanding-...
>
> You can then traverse all instances of spin:Template and get their spin:body.
> Then do the asQuery stuff above.
>
> Regards,
> Holger
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