/// <summary>
/// Detects the inline instances of shacl:PropertyShape and populates the shapes graph with their definition
/// </summary>
private static void DetectInlinePropertyShapes(RDFGraph graph, RDFShapesGraph shapesGraph)
{
RDFGraph inlinePropertyShapes = graph.SelectTriplesByPredicate(RDFVocabulary.SHACL.PROPERTY);
foreach (RDFTriple inlinePropertyShape in inlinePropertyShapes)
{
//Inline property shapes are blank objects of "sh:property" constraints:
//we wont find their explicit shape definition within the shapes graph.
if (inlinePropertyShape.Object is RDFResource inlinePropertyShapeResource &&
inlinePropertyShapeResource.IsBlank &&
shapesGraph.SelectShape(inlinePropertyShapeResource.ToString()) == null)
{
RDFTriple inlinePropertyShapePath = graph.SelectTriplesBySubject(inlinePropertyShapeResource)
.SelectTriplesByPredicate(RDFVocabulary.SHACL.PATH)
.FirstOrDefault();
if (inlinePropertyShapePath != null &&
inlinePropertyShapePath.Object is RDFResource)
{
RDFPropertyShape propertyShape = new RDFPropertyShape(inlinePropertyShapeResource, (RDFResource)inlinePropertyShapePath.Object);
DetectShapeTargets(graph, propertyShape);
DetectShapeAttributes(graph, propertyShape);
DetectShapeNonValidatingAttributes(graph, propertyShape);
DetectShapeConstraints(graph, propertyShape);
shapesGraph.AddShape(propertyShape);
}
}
}
}
/// <summary>
/// Detects the typed instances of shacl:PropertyShape and populates the shapes graph with their definition
/// </summary>
private static void DetectTypedPropertyShapes(RDFGraph graph, RDFShapesGraph shapesGraph)
{
RDFGraph declaredPropertyShapes = graph.SelectTriplesByPredicate(RDFVocabulary.RDF.TYPE)
.SelectTriplesByObject(RDFVocabulary.SHACL.PROPERTY_SHAPE);
foreach (RDFTriple declaredPropertyShape in declaredPropertyShapes)
{
RDFTriple declaredPropertyShapePath = graph.SelectTriplesBySubject((RDFResource)declaredPropertyShape.Subject)
.SelectTriplesByPredicate(RDFVocabulary.SHACL.PATH)
.FirstOrDefault();
if (declaredPropertyShapePath != null &&
declaredPropertyShapePath.Object is RDFResource)
{
RDFPropertyShape propertyShape = new RDFPropertyShape((RDFResource)declaredPropertyShape.Subject, (RDFResource)declaredPropertyShapePath.Object);
DetectShapeTargets(graph, propertyShape);
DetectShapeAttributes(graph, propertyShape);
DetectShapeNonValidatingAttributes(graph, propertyShape);
DetectShapeConstraints(graph, propertyShape);
shapesGraph.AddShape(propertyShape);
}
}
}
private static RDFShape ParseShapeType(DataRow shapesRow)
{
RDFShape shape = null;
//sh:NodeShape
if (!shapesRow.IsNull("?NSHAPE"))
{
shape = new RDFNodeShape(new RDFResource(shapesRow.Field <string>("?NSHAPE")));
}
//sh:PropertyShape
else if (!shapesRow.IsNull("?PSHAPE") && !shapesRow.IsNull("?PATH"))
{
shape = new RDFPropertyShape(new RDFResource(shapesRow.Field <string>("?PSHAPE")), new RDFResource(shapesRow.Field <string>("?PATH")));
//sh:description
if (!shapesRow.IsNull("?DESCRIPTION"))
{
RDFPatternMember description = RDFQueryUtilities.ParseRDFPatternMember(shapesRow.Field <string>("?DESCRIPTION"));
if (description is RDFLiteral)
{
((RDFPropertyShape)shape).AddDescription((RDFLiteral)description);
}
}
//sh:name
if (!shapesRow.IsNull("?NAME"))
{
RDFPatternMember name = RDFQueryUtilities.ParseRDFPatternMember(shapesRow.Field <string>("?NAME"));
if (name is RDFLiteral)
{
((RDFPropertyShape)shape).AddName((RDFLiteral)name);
}
}
//sh:group
if (!shapesRow.IsNull("?GROUP"))
{
RDFPatternMember group = RDFQueryUtilities.ParseRDFPatternMember(shapesRow.Field <string>("?GROUP"));
if (group is RDFResource)
{
((RDFPropertyShape)shape).SetGroup((RDFResource)group);
}
}
//sh:order
if (!shapesRow.IsNull("?ORDER"))
{
RDFPatternMember order = RDFQueryUtilities.ParseRDFPatternMember(shapesRow.Field <string>("?ORDER"));
if (order is RDFTypedLiteral && ((RDFTypedLiteral)order).Datatype.Equals(RDFModelEnums.RDFDatatypes.XSD_INTEGER))
{
((RDFPropertyShape)shape).SetOrder(int.Parse(((RDFTypedLiteral)order).Value));
}
}
}
return(shape);
}
/// <summary>
/// Detects the non validating attributes of the given property shape
/// </summary>
private static void DetectShapeNonValidatingAttributes(RDFGraph graph, RDFPropertyShape propertyShape)
{
RDFGraph shapeDefinition = graph.SelectTriplesBySubject(propertyShape);
//sh:description (accepted occurrences: N)
RDFGraph shapeDescriptions = shapeDefinition.SelectTriplesByPredicate(RDFVocabulary.SHACL.DESCRIPTION);
foreach (RDFTriple shapeDescription in shapeDescriptions.Where(t => t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL))
{
propertyShape.AddDescription((RDFLiteral)shapeDescription.Object);
}
//sh:name (accepted occurrences: N)
RDFGraph shapeNames = shapeDefinition.SelectTriplesByPredicate(RDFVocabulary.SHACL.NAME);
foreach (RDFTriple shapeName in shapeNames.Where(t => t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL))
{
propertyShape.AddName((RDFLiteral)shapeName.Object);
}
//sh:group (accepted occurrences: 1)
RDFTriple shapeGroup = shapeDefinition.SelectTriplesByPredicate(RDFVocabulary.SHACL.GROUP).FirstOrDefault();
if (shapeGroup != null)
{
if (shapeGroup.Object is RDFResource)
{
propertyShape.SetGroup((RDFResource)shapeGroup.Object);
}
}
//sh:order (accepted occurrences: 1)
RDFTriple shapeOrder = shapeDefinition.SelectTriplesByPredicate(RDFVocabulary.SHACL.ORDER).FirstOrDefault();
if (shapeOrder != null)
{
if (shapeOrder.Object is RDFTypedLiteral shapeOrderLiteral &&
shapeOrderLiteral.Datatype.Equals(RDFModelEnums.RDFDatatypes.XSD_INTEGER))
{
propertyShape.SetOrder(int.Parse(shapeOrderLiteral.Value));
}
}
}
/// <summary>
/// Evaluates this constraint against the given data graph
/// </summary>
internal override RDFValidationReport ValidateConstraint(RDFShapesGraph shapesGraph, RDFGraph dataGraph, RDFShape shape, RDFPatternMember focusNode, List <RDFPatternMember> valueNodes)
{
RDFValidationReport report = new RDFValidationReport();
#region Evaluation
if (this.Closed)
{
//Extend ignored properties with paths of property constraints
List <RDFResource> allowedProperties = new List <RDFResource>(this.IgnoredProperties.Values);
IEnumerable <RDFPropertyConstraint> propertyConstraints = shape.Constraints.OfType <RDFPropertyConstraint>();
foreach (RDFPropertyConstraint propertyConstraint in propertyConstraints)
{
RDFPropertyShape propertyShape = shapesGraph.SelectShape(propertyConstraint.PropertyShapeUri.ToString()) as RDFPropertyShape;
if (propertyShape != null)
{
allowedProperties.Add(propertyShape.Path);
}
}
//Detect unallowed predicates
foreach (RDFPatternMember valueNode in valueNodes)
{
if (valueNode is RDFResource valueNodeResource)
{
RDFGraph valuenodeResourceGraph = dataGraph.SelectTriplesBySubject(valueNodeResource);
IEnumerable <RDFTriple> unallowedTriples = valuenodeResourceGraph.Where(t => !allowedProperties.Any(p => p.Equals(t.Predicate)));
foreach (RDFTriple unallowedTriple in unallowedTriples)
{
report.AddResult(new RDFValidationResult(shape,
RDFVocabulary.SHACL.CLOSED_CONSTRAINT_COMPONENT,
valueNodeResource,
unallowedTriple.Predicate as RDFResource,
unallowedTriple.Object,
shape.Messages,
shape.Severity));
}
}
}
}
#endregion
return(report);
}
/// <summary>
/// Evaluates this constraint against the given data graph
/// </summary>
internal override RDFValidationReport ValidateConstraint(RDFShapesGraph shapesGraph, RDFGraph dataGraph, RDFShape shape, RDFPatternMember focusNode, List <RDFPatternMember> valueNodes)
{
RDFValidationReport report = new RDFValidationReport();
//Search for given property shape
RDFPropertyShape propertyShape = shapesGraph.SelectShape(this.PropertyShapeUri.ToString()) as RDFPropertyShape;
if (propertyShape == null)
{
return(report);
}
#region Evaluation
RDFValidationReport propertyShapeReport = RDFValidationEngine.ValidateShape(shapesGraph, dataGraph, propertyShape, valueNodes);
if (!propertyShapeReport.Conforms)
{
report.MergeResults(propertyShapeReport);
}
#endregion
return(report);
}
