/// <summary>
/// Processes an INSERT DATA command
/// </summary>
/// <param name="cmd">Insert Data Command</param>
public void ProcessInsertDataCommand(InsertDataCommand cmd)
{
if (this._manager is IUpdateableGenericIOManager)
{
((IUpdateableGenericIOManager)this._manager).Update(cmd.ToString());
}
else
{
//Check IO Behaviour
//For a insert we either need the ability to Update Delete Triples or to Overwrite Graphs
//Firstly check behaviour persuant to default graph if applicable
if (cmd.DataPattern.TriplePatterns.OfType<IConstructTriplePattern>().Any())
{
//Must support notion of default graph
if ((this._manager.IOBehaviour & IOBehaviour.HasDefaultGraph) == 0) throw new SparqlUpdateException("The underlying store does not support the notion of an explicit unnamed Default Graph required to process this command");
//Must allow either OverwriteDefault or CanUpdateAddTriples
if ((this._manager.IOBehaviour & IOBehaviour.CanUpdateAddTriples) == 0 && (this._manager.IOBehaviour & IOBehaviour.OverwriteDefault) == 0) throw new SparqlUpdateException("The underlying store does not support the required IO Behaviour to implement this command");
}
//Then check behaviour persuant to named graphs if applicable
if (cmd.DataPattern.HasChildGraphPatterns)
{
//Must support named graphs
if ((this._manager.IOBehaviour & IOBehaviour.HasNamedGraphs) == 0) throw new SparqlUpdateException("The underlying store does not support the notion of named graphs required to process this command");
//Must allow either CanUpdateAddTriples or OverwriteNamed
if ((this._manager.IOBehaviour & IOBehaviour.CanUpdateAddTriples) == 0 && (this._manager.IOBehaviour & IOBehaviour.OverwriteNamed) == 0) throw new SparqlUpdateException("The underlying store does not support the required IO Behaviour to implement this command");
}
//Split the Pattern into the set of Graph Patterns
List<GraphPattern> patterns = new List<GraphPattern>();
if (cmd.DataPattern.IsGraph)
{
patterns.Add(cmd.DataPattern);
}
else if (cmd.DataPattern.TriplePatterns.Count > 0 || cmd.DataPattern.HasChildGraphPatterns)
{
if (cmd.DataPattern.TriplePatterns.Count > 0)
{
patterns.Add(new GraphPattern());
cmd.DataPattern.TriplePatterns.ForEach(tp => patterns[0].AddTriplePattern(tp));
}
cmd.DataPattern.ChildGraphPatterns.ForEach(gp => patterns.Add(gp));
}
else
{
//If no Triple Patterns and No Child Graph Patterns nothing to do
return;
}
foreach (GraphPattern pattern in patterns)
{
if (!this.IsValidDataPattern(pattern, false)) throw new SparqlUpdateException("Cannot evaluate an INSERT DATA command where any of the Triple Patterns are not concrete triples - variables are not permitted");
Uri graphUri = null;
if (pattern.IsGraph)
{
switch (pattern.GraphSpecifier.TokenType)
{
case Token.QNAME:
throw new NotSupportedException("Graph Specifiers as QNames for INSERT DATA Commands are not supported - please specify an absolute URI instead");
case Token.URI:
graphUri = UriFactory.Create(pattern.GraphSpecifier.Value);
break;
default:
throw new SparqlUpdateException("Cannot evaluate an INSERT DATA Command as the Graph Specifier is not a QName/URI");
}
}
Graph g = new Graph();
if (!this._manager.UpdateSupported) this._manager.LoadGraph(g, graphUri);
//Insert the actual Triples
INode subj, pred, obj;
ConstructContext context = new ConstructContext(g, null, true);
foreach (IConstructTriplePattern p in pattern.TriplePatterns.OfType<IConstructTriplePattern>())
{
subj = p.Subject.Construct(context);
pred = p.Predicate.Construct(context);
obj = p.Object.Construct(context);
g.Assert(new Triple(subj, pred, obj));
}
if (this._manager.UpdateSupported)
{
this._manager.UpdateGraph(graphUri, g.Triples, Enumerable.Empty<Triple>());
}
else
{
this._manager.SaveGraph(g);
}
}
}
}
/// <summary>
/// Processes an INSERT DATA command
/// </summary>
/// <param name="cmd">Insert Data Command</param>
public void ProcessInsertDataCommand(InsertDataCommand cmd)
{
if (this._manager is IUpdateableGenericIOManager)
{
((IUpdateableGenericIOManager)this._manager).Update(cmd.ToString());
}
else
{
//Split the Pattern into the set of Graph Patterns
List<GraphPattern> patterns = new List<GraphPattern>();
if (cmd.DataPattern.IsGraph)
{
patterns.Add(cmd.DataPattern);
}
else if (cmd.DataPattern.TriplePatterns.Count > 0 || cmd.DataPattern.HasChildGraphPatterns)
{
if (cmd.DataPattern.TriplePatterns.Count > 0)
{
patterns.Add(new GraphPattern());
cmd.DataPattern.TriplePatterns.ForEach(tp => patterns[0].AddTriplePattern(tp));
}
cmd.DataPattern.ChildGraphPatterns.ForEach(gp => patterns.Add(gp));
}
else
{
//If no Triple Patterns and No Child Graph Patterns nothing to do
return;
}
foreach (GraphPattern pattern in patterns)
{
if (!this.IsValidDataPattern(pattern, false)) throw new SparqlUpdateException("Cannot evaluate an INSERT DATA command where any of the Triple Patterns are not concrete triples - variables are not permitted");
Uri graphUri = null;
if (pattern.IsGraph)
{
switch (pattern.GraphSpecifier.TokenType)
{
case Token.QNAME:
throw new NotImplementedException("Graph Specifiers as QNames for INSERT DATA Commands are not supported - please specify an absolute URI instead");
case Token.URI:
graphUri = new Uri(pattern.GraphSpecifier.Value);
break;
default:
throw new SparqlUpdateException("Cannot evaluate an INSERT DATA Command as the Graph Specifier is not a QName/URI");
}
}
Graph g = new Graph();
if (!this._manager.UpdateSupported) this._manager.LoadGraph(g, graphUri);
//Insert the actual Triples
INode subj, pred, obj;
ConstructContext context = new ConstructContext(g, null, true);
foreach (IConstructTriplePattern p in pattern.TriplePatterns.OfType<IConstructTriplePattern>())
{
subj = p.Subject.Construct(context);
pred = p.Predicate.Construct(context);
obj = p.Object.Construct(context);
g.Assert(new Triple(subj, pred, obj));
}
if (this._manager.UpdateSupported)
{
this._manager.UpdateGraph(graphUri, g.Triples, Enumerable.Empty<Triple>());
}
else
{
this._manager.SaveGraph(g);
}
}
}
}
