/// <summary>
/// Gets the value nodes of the given focus node
/// </summary>
internal static List <RDFPatternMember> GetValueNodesOf(this RDFGraph dataGraph, RDFShape shape, RDFPatternMember focusNode)
{
List <RDFPatternMember> result = new List <RDFPatternMember>();
if (shape != null && dataGraph != null)
{
switch (shape)
{
//sh:NodeShape
case RDFNodeShape nodeShape:
result.Add(focusNode);
break;
//sh:PropertyShape
case RDFPropertyShape propertyShape:
if (focusNode is RDFResource)
{
foreach (var triple in dataGraph.SelectTriplesBySubject((RDFResource)focusNode)
.SelectTriplesByPredicate(((RDFPropertyShape)shape).Path))
{
result.Add(triple.Object);
}
}
break;
}
}
return(RDFQueryUtilities.RemoveDuplicates(result));
}
/// <summary>
/// Gets the focus nodes of the given shape
/// </summary>
internal static List <RDFPatternMember> GetFocusNodesOf(this RDFGraph dataGraph, RDFShape shape)
{
List <RDFPatternMember> result = new List <RDFPatternMember>();
if (shape != null && dataGraph != null)
{
foreach (RDFTarget target in shape.Targets)
{
switch (target)
{
//sh:targetClass
case RDFTargetClass targetClass:
result.AddRange(dataGraph.GetInstancesOfClass(target.TargetValue)
.OfType <RDFResource>());
break;
//sh:targetNode
case RDFTargetNode targetNode:
result.Add(target.TargetValue);
break;
//sh:targetSubjectsOf
case RDFTargetSubjectsOf targetSubjectsOf:
result.AddRange(dataGraph.SelectTriplesByPredicate(target.TargetValue)
.Select(x => x.Subject)
.OfType <RDFResource>());
break;
//sh:targetObjectsOf
case RDFTargetObjectsOf targetObjectsOf:
result.AddRange(dataGraph.SelectTriplesByPredicate(target.TargetValue)
.Select(x => x.Object)
.OfType <RDFResource>());
break;
}
}
}
return(RDFQueryUtilities.RemoveDuplicates(result));
}