org.topbraid.shacl.expr.lib

Class ExistsExpression

java.lang.Object

org.topbraid.shacl.expr.AbstractNodeExpression

org.topbraid.shacl.expr.ComplexNodeExpression

org.topbraid.shacl.expr.AbstractInputExpression

org.topbraid.shacl.expr.lib.ExistsExpression

All Implemented Interfaces:

NodeExpression

public class ExistsExpression
extends AbstractInputExpression

Implements support for sh:exists. This node expression type is not part of the SHACL-AF 1.0 document, but a candidate for 1.1.

Author:

Holger Knublauch

Constructor Summary

Constructors

Constructor and Description
ExistsExpression(org.apache.jena.rdf.model.RDFNode expr, NodeExpression input)

Method Summary

Modifier and Type	Method and Description
org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.rdf.model.RDFNode>	eval(org.apache.jena.rdf.model.RDFNode focusNode, NodeExpressionContext context) Produces an iterator of value nodes for a given focus node.
String	getTypeId()
void	visit(NodeExpressionVisitor visitor)

Methods inherited from class org.topbraid.shacl.expr.AbstractInputExpression

evalInput, getFunctionalSyntaxArguments, getInput, getInputExpressions

Methods inherited from class org.topbraid.shacl.expr.ComplexNodeExpression

getFunctionalSyntax, getFunctionalSyntaxName

Methods inherited from class org.topbraid.shacl.expr.AbstractNodeExpression

evalReverse, getOutputShape, getRDFNode, isReversible, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ExistsExpression

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

Method Detail

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)

getTypeId

public String getTypeId()

visit

public void visit(NodeExpressionVisitor visitor)