On 21/06/2021 14:48, jdejong.lcsd wrote:
Hi all,
I’m using the Jena query builder from the Jena-extras and I was wondering if
there was a way to add a SERVICE clause to a SelectBuilder object.
I’ve also tried adding the SERVICE clause to a Query object after calling
builder.build(), but it seems like it’s only possible through the ARQ API using
body.addElement(new ElementService("http://any.domain/sparql";, elementBlock)).
The problem is that you can’t get the elementBlock from a Query object or SelectBuilder
object.
Query.getQueryPattern() -> Element
My code right now looks like this:
SelectBuilder builder =
new
SelectBuilder()
.addPrefix(
"rdf"
,
"
http://www.w3.org/1999/02/22-rdf-syntax-ns#
"
)
.addPrefix(
"dbo"
,
"
http://dbpedia.org/ontology/
"
)
.addVar(
"?uri"
)
.addWhere(
"?uri"
,
"rdf:type"
,
"dbo:Company"
)
.setLimit(
100
)
;
Query query = builder.build()
;
System.
out
.println(query)
;
Is there a way to add a SERVICE clause using the query builder or are there
known workarounds without resorting to the verbose ARQ API, or should I try and
extend the SelectBuilder API myself?
