public IGraph Get()
{
var g = (IGraph)_tripleStore.Query(@"
CONSTRUCT { ?s ?p ?o }
WHERE {
GRAPH ?g {
?s ?p ?o
}
}
");
return(g);
}
internal object ExecuteQuery(IQuery spinQuery)
{
ExecuteUpdate();
ISparqlPrinter sparqlFactory = new BaseSparqlPrinter(this);
if (_queryExecutionMode != QueryMode.UserQuerying && spinQuery is IConstruct)
{
ExecuteUpdate((IConstruct)spinQuery);
return(null); // TODO is this correct or should we return the execution graph ?
}
SparqlParameterizedString commandText = sparqlFactory.GetCommandText(spinQuery);
return(Storage.Query(commandText.ToString()));
}
internal static SpinDatasetDescription Load(IUpdateableStorage storage, Uri datasetUri = null, IEnumerable <Uri> graphsUri = null)
{
SpinDatasetDescription dataset;
if (datasetUri == null)
{
SparqlResultSet datasetDiscovery = (SparqlResultSet)storage.Query("SELECT ?dataset WHERE {?dataset a <" + SD.ClassDataset.Uri.ToString() + ">}");
int datasetCount = datasetDiscovery.Results.Count;
if (datasetCount > 1)
{
throw new Exception("More than one dataset has been found in the current storage provider. Please specify which to use through the datasetUri parameter.");
}
else if (datasetCount == 1)
{
datasetUri = ((IUriNode)datasetDiscovery.Results.FirstOrDefault().Value("dataset")).Uri;
}
else
{
datasetUri = UriFactory.Create(RDFRuntime.DATASET_NS_URI + Guid.NewGuid().ToString());
}
}
dataset = new SpinDatasetDescription(datasetUri);
storage.LoadGraph(dataset, datasetUri);
dataset.BaseUri = datasetUri;
Triple isUpdateControlledDataset = dataset.GetTriplesWithPredicate(RDFRuntime.PropertyUpdatesDataset).FirstOrDefault();
if (isUpdateControlledDataset != null)
{
dataset._sourceUri = ((IUriNode)isUpdateControlledDataset.Object).Uri;
}
else
{
dataset.Assert(RDFUtil.CreateUriNode(datasetUri), RDF.PropertyType, SD.ClassDataset);
}
return(dataset);
}