Hi,
Some qustions about this problem came out after that.
1) Are there any ways to detect only non-nested queries?
ex) First "SELECT" in
http://www.learningsparql.com/2ndeditionexamples/ex143.rq is non-nested
queries, and the other "SELECT"s are nested queries.
2) Are there any ways to convert into right-order updates?
ex) In http://www.learningsparql.com/2ndeditionexamples/ex330.ru , the
"INSERT" must be placed after "CLEAR".
2013年11月8日金曜日 12時51分12秒 UTC+9 Ryo MATSUMIYA:
>
> I misunderstood about Model.createResource().
> So, I changed the source to which you guess, and then the program worked
> well.
> Thanks a lot!
>
> (2013年11月08日 10:24), Holger Knublauch wrote:
> > In those lines
> >
> > Resource rsrc = model.createResource();
> > org.topbraid.spin.model.Query query =
> > SPINFactory.asQuery(rsrc); // This function always returns null.
> >
> > you are first creating a new Resource which has no triples attached to
> > it, and then try to convert it to a Query. This is not how it will work.
> > You need to find an existing instance of sp:Select from your Model, e.g.
> > using
> >
> > StmtIterator it = model.listStatements(null, RDF.type, SP.Select);
> > while(it.hasNext()) {
> > Resource rsrc = it.next().getSubject();
> > ....
> > }
> >
> > HTH
> > Holger
> >
> >
> >
> > On 11/8/2013 11:20, [email protected] <javascript:> wrote:
> >> Hi Holger,
> >>
> >> I got it.
> >> I attached the source code.
> >>
> >> Thanks,
> >> Ryo
> >>
> >> 2013?11?8???? 9?59?29? UTC+9 Holger Knublauch:
> >>
> >> Hi Ryo,
> >>
> >> sorry I cannot see what would be wrong. I would need a complete
> >> example (Java code) to reproduce this.
> >>
> >> Regards,
> >> Holger
> >>
> >>
> >> On 11/8/2013 10:38, [email protected] <javascript:> wrote:
> >>> Hi Holger,
> >>>
> >>> The rdf:types of the resource is http://spinrdf.org/sp#Select
> >>> <http://spinrdf.org/sp#Select> .
> >>>
> >>> Thanks,
> >>> Ryo
> >>> 2013?11?6???? 13?45?20? UTC+9 Holger Knublauch:
> >>>
> >>> Hi,
> >>>
> >>> the resource needs to have rdf:type sp:Select (or sp:Ask
> >>> etc). Could you
> >>> send me the part of the (Turtle) source code that defines
> >>> that resource,
> >>> or (even better) print out the rdf:types of the resource in
> >>> the Jena model?
> >>>
> >>> Thanks,
> >>> Holger
> >>>
> >>>
> >>> On 11/1/2013 13:38, [email protected] wrote:
> >>> > Hi,
> >>> >
> >>> > I'm trying to convert a file of SPIN query in RDF to raw
> >>> SPARQL query
> >>> > with the API.
> >>> > I used
> >>> >
> >>>
> >>>
> com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel().read(InputStream,
>
> >>>
> >>>
> >>> > String, String).createResource() to convert SPIN query to
> >>> > com.hp.hpl.jena.rdf.model.Resource.
> >>> > Converting to com.hp.hpl.jena.rdf.model.Resource might be
> >>> successful
> >>> >
> >>> (com.hp.hpl.jena.rdf.model.Resource.getModel().write(Writer)
> >>> runs well).
> >>> > However,
> >>> SPINFactory.asQuery(com.hp.hpl.jena.rdf.model.Resource)
> >>> > returned null.
> >>> > What is wrong? The RDF file is right.
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