private static Uri getValue(string sparql, bool canCreateNewId, Logger logger)
{
IGraph graph = GraphRetrieval.GetGraph(sparql, logger, "true");
if (graph.IsEmpty)
{
if (canCreateNewId == true)
{
string id = new IdGenerator.IdMaker().MakeId(logger);
logger.Verbose($"Created new id ({id})");
return(new Uri(id));
}
else
{
logger.Verbose("Not found");
return(null);
}
}
else
{
Uri result = ((IUriNode)graph.Triples.SubjectNodes.SingleOrDefault()).Uri;
logger.Verbose($"Found existing ({result})");
return(result);
}
}
private IGraph getExistingGraph(Uri subject, Dictionary <string, INode> graphRetrievalDictionary, T settings)
{
graphRetrievalDictionary = graphRetrievalDictionary ?? new Dictionary <string, INode>();
graphRetrievalDictionary.Add("subject", SparqlConstructor.GetNode(subject));
SparqlConstructor sparqlConstructor = new SparqlConstructor(settings.ExistingGraphSparqlCommand, graphRetrievalDictionary);
sparqlConstructor.Sparql.Namespaces.AddNamespace("parl", new Uri(schemaNamespace));
logger.Verbose("Trying to get existing graph");
return(GraphRetrieval.GetGraph(sparqlConstructor.Sparql.ToString(), logger));
}
public static Dictionary <string, string> GetSubjectsDictionary(string predicate, Logger logger)
{
string command = @"
construct{
?s @predicate ?objectValue.
}
where{
?s @predicate ?objectValue.
}";
SparqlParameterizedString sparql = new SparqlParameterizedString(command);
sparql.SetUri("predicate", new Uri($"{schemaNamespace}{predicate}"));
Dictionary <string, string> result = new Dictionary <string, string>();
IGraph graph = GraphRetrieval.GetGraph(sparql.ToString(), logger, "false");
foreach (Triple triple in graph.Triples)
{
result.Add(triple.Object.ToString(), triple.Subject.ToString());
}
return(result);
}