How to execute a SPARQL update in SailGraph by Tinkerpop - neo4j

Question

My question is basically how to properly execute a SPARQL update using SailGraph created by Tinkerpop.
DELETE { ?i_id_iri rdfs:label "BII-I-1" }
INSERT { ?i_id_iri rdfs:label "BII-I-4" }
WHERE
{
?investigation rdf:type obi:0000011.
?i_id_iri rdf:type iao:0000577.
?i_id_iri iao:0000219 ?investigation.
}
I have this query so far with the prefixes added on top from another file but it does not work.
The code i run is as follows
query = parser.parseUpdate(queryString, baseURI);
UpdateExpr expr = query.getUpdateExprs().get(0);
Dataset dataset = query.getDatasetMapping().get(expr);
GraphDatabase.getSailConnection().executeUpdate(expr, dataset, new EmptyBindingSet(), false);

Answer 1

I'm not particularly familiar with the Tinkerpop GraphSail, but assuming it implements the Sesame SAIL API correctly, executing a SPARQL query is far easier if you just wrap it in a SailRepository, like so:
TinkerGraph graph = new TinkerGraph();
Sail sail = new GraphSail(graph);
Repository rep = new SailRepository(sail);
rep.initialize();
You can then use Sesame's Repository API, which is far more user-friendly than trying to do operations directly on the SAIL (which is not designed for that purpose).
To open a connection and execute a SPARQL update, for example, you do:
RepositoryConnection conn = rep.getConnection();
try {
String sparql = "INSERT {?s a <foo:example> . } WHERE {?s ?p ?o } ";
Update update = conn.prepareUpdate(QueryLanguage.SPARQL, sparql);
update.execute();
}
finally {
conn.close();
}
See link above for more details on Sesame's Repository API, or check out the Javadoc.