// TODO Replace IUpdate with a SparqlUpdateCommand
private void UpdateInternal(IUpdate spinQuery, Uri outputGraphUri)
{
ISparqlPrinter sparqlFactory = new BaseSparqlPrinter(this);
// TODO handle the current Execution Context while rewriting queries
SparqlParameterizedString command = sparqlFactory.GetCommandText(spinQuery);
command.SetUri("datasetUri", Configuration.BaseUri);
command.SetUri("outputGraph", outputGraphUri);
this.SaveConfiguration();
if (!(spinQuery is IInsertData || spinQuery is IDeleteData))
{
CommandCalls.Add(command.ToString());
Storage.Update(command.ToString());
UpdateInternal(new DeleteDataImpl(RDF.Nil, spinProcessor), outputGraphUri);
UpdateInternal(new InsertDataImpl(RDF.Nil, spinProcessor), outputGraphUri);
ResetActiveGraph();
return;
}
SaveInMemoryChanges();
HashSet <Uri> dataGraphs = new HashSet <Uri>(RDFUtil.uriComparer);
dataGraphs.UnionWith(spinQuery is IDeleteData ? Configuration.GetTriplesRemovalsGraphs() : Configuration.GetTriplesAdditionsGraphs());
try
{
Storage.Update(command.ToString());
_ignoreMonitoredChangeEvents = true;
// TODO if needed : postpone this until full update execution is done to alleviate I/O
foreach (IGraph synced in _synchronizedGraphs)
{
Uri changesGraphUri = spinQuery is IDeleteData?Configuration.GetTripleRemovalsMonitorUri(synced.BaseUri) : Configuration.GetTripleAdditionsMonitorUri(synced.BaseUri);
IGraph changes = new ThreadSafeGraph();
Storage.LoadGraph(changes, changesGraphUri);
if (spinQuery is IDeleteData)
{
synced.Retract(changes.Triples);
}
else
{
synced.Assert(changes.Triples);
}
}
_ignoreMonitoredChangeEvents = false;
}
finally
{
foreach (Uri graphUri in dataGraphs)
{
Storage.DeleteGraph(graphUri);
}
}
}
/// <summary>
/// Process a SPIN query and return the SPARQL Update commands that it compiles to
/// </summary>
/// <param name="spinQuery"></param>
/// <returns></returns>
public String GetUpdateQuery(String spinQuery)
{
StringBuilder sb = new StringBuilder();
foreach (IUpdate update in _spinProcessor.BuildUpdate(spinQuery))
{
this.SaveConfiguration();
BaseSparqlPrinter sparqlFactory = new BaseSparqlPrinter(this);
sb.Append(sparqlFactory.GetCommandText(update));
sb.AppendLine();
}
return(sb.ToString());
}
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()));
}
