Hi.
Is it possible to get at the graph i.e. the ?g (specifically the returned
nodes) when the following query is executed?
SELECT *
WHERE
{ { ?g <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
http://www.unit4.com/daas/graph#Graph> }
GRAPH ?g
{ ?s ?p ?o }
}
When the result is instantiated I want to return the ?g as an RDFS
infmodel. Ideally I want to decide what to return based on the ?g. I've
traced the execSelect() and the ResultSetMem() but drew a blank as to where
I can get at the ?g's!
The following allows me to wrap the returned graph but this is static i.e.
I need to know the ?g's to generate the dgm to pass to the
QueryExecutionFactory.
dataset.begin(ReadWrite.READ);
DatasetGraphMap dgm = new DatasetGraphMap(dataset.asDatasetGraph()) {
@Override
public Graph getGraph(Node graphNode) {
Graph g = super.getGraph(graphNode);
if (graphNode.getURI().equals(types.getURI())) {
g = asRDFS(g);
}
return g;
}
public Graph asRDFS(Graph g) {
return
ModelFactory.createRDFSModel(ModelFactory.createModelForGraph(g)).getGraph();
}
};
Graph g = dgm.getGraph(types.asNode());
info(g.size());
dataset.end();
For the following triples loaded in the default graph;
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix graph: <http://www.unit4.com/daas/graph#>.
@prefix graphs: <http://www.unit4.com/daas/graphs/>.
graph:Graph
rdf:type rdfs:Class.
graphs:g1
rdf:type graph:Graph.
and these loaded in a named graph <http://www.unit4.com/daas/graphs/g1>;
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix graph: <http://www.unit4.com/daas/graph#>.
@prefix graphs: <http://www.unit4.com/daas/graphs/>.
graphs:g1
rdfs:label "Graph 1".
A select returns;
select * where {{ ?g a <http://www.unit4.com/daas/graph#Graph> }. graph ?g
{?s ?p ?o}}
--------------------------------------------------------------------------------------------------------------------------------------------
| g | s
| p | o |
============================================================================================================================================
| <http://www.unit4.com/daas/graphs/g1> | <
http://www.unit4.com/daas/graphs/g1> | <
http://www.w3.org/2000/01/rdf-schema#label> | "Graph 1" |
--------------------------------------------------------------------------------------------------------------------------------------------
What I want is for it to return about 40 more... :-)
