Package org.topbraid.shacl.expr.lib

Class PathExpression

java.lang.Object
org.topbraid.shacl.expr.AbstractNodeExpression
org.topbraid.shacl.expr.ComplexNodeExpression
org.topbraid.shacl.expr.AbstractInputExpression
org.topbraid.shacl.expr.lib.PathExpression
All Implemented Interfaces:
NodeExpression
public class PathExpression extends AbstractInputExpression

  • Constructor Details

    • PathExpression

      public PathExpression(org.apache.jena.rdf.model.RDFNode expr, org.apache.jena.rdf.model.Resource path, 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)

    • evalReverse

      public org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.rdf.model.RDFNode> evalReverse(org.apache.jena.rdf.model.RDFNode valueNode, NodeExpressionContext context)
      Description copied from interface: NodeExpression
      Produces an iterator of focus nodes for a given value node. This operation can only be called for node expressions where isReversible returns true and may throw an IllegalStateException otherwise.
      Specified by:
      evalReverse in interface NodeExpression
      Overrides:
      evalReverse in class AbstractNodeExpression
      Parameters:
      valueNode - the value node
      context - the context
      Returns:
      an iterator (never null)

    • getJenaPath

      public org.apache.jena.sparql.path.Path getJenaPath()

    • getPredicate

      public org.apache.jena.rdf.model.Property getPredicate()

    • getFunctionalSyntaxArguments

      public List<String> getFunctionalSyntaxArguments()
      Overrides:
      getFunctionalSyntaxArguments in class AbstractInputExpression

    • 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

    • getPath

      public org.apache.jena.rdf.model.Resource getPath()

    • getTypeId

      public String getTypeId()

    • isMaybeInferred

      public boolean isMaybeInferred(ShapesGraph shapesGraph)

    • isReversible

      public boolean isReversible(NodeExpressionContext context)
      Description copied from interface: NodeExpression
      Checks if this expression could be evaluated in the reverse direction, with a value given and then finding all focus nodes. The function evalReverse can then be called. NOTE THAT THIS IS CURRENTLY BARELY IMPLEMENTED.
      Specified by:
      isReversible in interface NodeExpression
      Overrides:
      isReversible in class AbstractNodeExpression
      Parameters:
      context - the context
      Returns:
      true if reversible

    • visit

      public void visit(NodeExpressionVisitor visitor)