Package org.topbraid.shacl.expr.lib

Class LimitExpression

java.lang.Object

org.topbraid.shacl.expr.AbstractNodeExpression

org.topbraid.shacl.expr.ComplexNodeExpression

org.topbraid.shacl.expr.AbstractInputExpression

org.topbraid.shacl.expr.lib.LimitExpression

All Implemented Interfaces:

NodeExpression

public class LimitExpression
extends AbstractInputExpression

Implements support for sh:limit. 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	Description
LimitExpression(org.apache.jena.rdf.model.RDFNode expr, NodeExpression input, int limit)

Method Summary

Modifier and Type	Method	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.
List<String>	getFunctionalSyntaxArguments()
int	getLimit()
org.apache.jena.rdf.model.Resource	getOutputShape(org.apache.jena.rdf.model.Resource contextShape)	Gets the shape of the output data (if known), based on a context shape.
String	getTypeId()
void	visit(NodeExpressionVisitor visitor)

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

evalInput, getInput, getInputExpressions

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

getFunctionalSyntax, getFunctionalSyntaxName

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

evalReverse, getRDFNode, isReversible, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LimitExpression

public LimitExpression(org.apache.jena.rdf.model.RDFNode expr,
                       NodeExpression input,
                       int limit)

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)

getFunctionalSyntaxArguments

public List<String> getFunctionalSyntaxArguments()

Overrides:

getFunctionalSyntaxArguments in class AbstractInputExpression

getLimit

public int getLimit()

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()

visit

public void visit(NodeExpressionVisitor visitor)