Holger,
I have a SPIN query for which I want to change the ORDER BY expression --
say change the ?var name, or change ASC to DESC for example.
I have implemented the following method:
public QueryBuilder orderBy(Variable var, boolean desc)
{
spinQuery.removeAll(SP.orderBy); // does not have effect??
Resource bnode =
spinQuery.getModel().createResource().addProperty(SP.expression, var);
spinQuery.addProperty(SP.orderBy, spinQuery.getModel().createList(new
RDFNode[]{bnode}));
if (desc)
bnode.addProperty(RDF.type, SP.Desc);
else
bnode.addProperty(RDF.type, SP.Asc);
log.debug("SPIN Query Model size(): {}", spinQuery.getModel().size());
return this;
}
However, it doesn't look like the removal has effect -- sp:orderBy is still
present, and as a result it gets duplicated by the following code.
Any ideas? Am I missing something?
Martynas
graphity.org
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