private T Get <T>(Uri uri)
where T : class
{
var query = new SparqlParameterizedString(Resource.AsString("SparqlQueries.GetSingle.rq"));
query.SetUri("source", uri);
var graph = (IGraph)this.queryProcessor.Value.ProcessQuery(this.parser.ParseFromString(query.ToString()));
if (graph.Triples.Count > 0)
{
var dataset = StringWriter.Write(graph, new NTriplesWriter(NTriplesSyntax.Rdf11));
return(this.serializer.Deserialize <T>(dataset));
}
return(null);
}
private async Task <TCollection> GetAll <T, TCollection>(Uri collectionUri, int page, int pageSize = 10)
where T : class
where TCollection : SearchableCollection <T>, new()
{
var query = new SparqlParameterizedString(Resource.AsString("SparqlQueries.GetSourcesPage.rq"));
query.SetUri("type", GetTypeUri(typeof(T)));
query.SetUri("collection", collectionUri);
query.SetLiteral("page", page);
query.SetLiteral("limit", pageSize);
query.SetLiteral("offset", (page - 1) * pageSize);
var graph = (IGraph)this.queryProcessor.Value.ProcessQuery(this.parser.ParseFromString(query.ToString()));
if (graph.Triples.Count > 0)
{
var dataset = StringWriter.Write(graph, new NTriplesWriter(NTriplesSyntax.Rdf11));
return(this.serializer.Deserialize <TCollection>(dataset));
}
return(new TCollection());
}