// TODO change the name into something sensible
internal void EnableUpdateControl()
{
if (!IsChanged)
{
IUriNode sourceDataset = RDFUtil.CreateUriNode(_sourceUri);
BaseUri = RDFRuntime.NewTempDatasetUri();
this.Retract(sourceDataset, RDF.PropertyType, SD.ClassDataset);
this.Assert(RDFUtil.CreateUriNode(BaseUri), RDFRuntime.PropertyUpdatesDataset, sourceDataset);
}
}
internal Uri GetUpdateControlUri(Uri graphUri, bool create = true)
{
Uri uri = GetTriplesWithPredicateObject(RDFRuntime.PropertyReplacesGraph, RDFUtil.CreateUriNode(graphUri))
.Union(GetTriplesWithPredicateObject(RDFRuntime.PropertyUpdatesGraph, RDFUtil.CreateUriNode(graphUri)))
.Select(t => ((IUriNode)t.Subject).Uri)
.FirstOrDefault();
if (uri == null && create)
{
uri = RDFRuntime.NewUpdateControlGraphUri();
}
return(uri);
}
internal Uri GetTripleAdditionsMonitorUri(Uri graphUri)
{
if (_additionGraphs.ContainsKey(graphUri))
{
return(_additionGraphs[graphUri]);
}
IUriNode monitoredGraph = RDFUtil.CreateUriNode(GetUpdateControlUri(GetModifiableGraph(graphUri).BaseUri));
Uri uri = RDFRuntime.NewTempGraphUri();
_additionGraphs[graphUri] = uri;
_additionGraphs[monitoredGraph.Uri] = uri;
this.Assert(RDFUtil.CreateUriNode(uri), RDFRuntime.PropertyAddTriplesTo, monitoredGraph);
return(uri);
}
internal Uri GetTripleRemovalsMonitorUri(Uri graphUri)
{
EnableUpdateControl();
if (_removalGraphs.ContainsKey(graphUri))
{
return(_removalGraphs[graphUri]);
}
IUriNode monitoredGraph = RDFUtil.CreateUriNode(GetUpdateControlUri(GetModifiableGraph(graphUri).BaseUri));
Uri uri = RDFRuntime.NewTempGraphUri();
_removalGraphs[graphUri] = uri;
_removalGraphs[monitoredGraph.Uri] = uri;
this.Assert(RDFUtil.CreateUriNode(uri), RDFRuntime.PropertyDeleteTriplesFrom, monitoredGraph);
return(uri);
}
