Package org.topbraid.shacl.expr.lib

Class DistinctExpression

java.lang.Object
org.topbraid.shacl.expr.AbstractNodeExpression
org.topbraid.shacl.expr.ComplexNodeExpression
org.topbraid.shacl.expr.AbstractInputExpression
org.topbraid.shacl.expr.lib.DistinctExpression
All Implemented Interfaces:
NodeExpression
public class DistinctExpression extends AbstractInputExpression
Implements support for sh:distinct. This node expression type is not part of the SHACL-AF 1.0 document, but a candidate for 1.1.
Author:
Holger Knublauch

  • Constructor Details

    • DistinctExpression

      public DistinctExpression(org.apache.jena.rdf.model.RDFNode expr, NodeExpression input)

  • Method Details

    • eval

      public org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.rdf.model.RDFNode> eval(org.apache.jena.rdf.model.RDFNode focusNode, NodeExpressionContext context)
      Description copied from interface: NodeExpression
      Produces an iterator of value nodes for a given focus node.
      Parameters:
      focusNode - the focus node
      context - the context
      Returns:
      an iterator (never null)

    • getOutputShape

      public org.apache.jena.rdf.model.Resource getOutputShape(org.apache.jena.rdf.model.Resource contextShape)
      Description copied from interface: NodeExpression
      Gets the shape of the output data (if known), based on a context shape. For example, for a path expression it would try to infer the output shape from the sh:class or sh:node of the property (path).
      Specified by:
      getOutputShape in interface NodeExpression
      Overrides:
      getOutputShape in class AbstractNodeExpression
      Parameters:
      contextShape - the shape where the evaluation would start, e.g. the node shape of the sh:values statement
      Returns:
      an output shape or null if unknown

    • getTypeId

      public String getTypeId()

    • distinct

      public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.rdf.model.RDFNode> distinct(org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.rdf.model.RDFNode> base)
      Produces an RDFNode iterator that drops duplicate values, based on a Set.
      Parameters:
      base - the iterator to wrap
      Returns:
      a distinct iterator

    • visit

      public void visit(NodeExpressionVisitor visitor)