Package org.eclipse.rdf4j.federated.evaluation.iterator

Class FedXZeroLengthPathIteration

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<BindingSet,QueryEvaluationException>

org.eclipse.rdf4j.common.iteration.LookAheadIteration<BindingSet,QueryEvaluationException>

org.eclipse.rdf4j.federated.evaluation.iterator.FedXZeroLengthPathIteration

All Implemented Interfaces:

AutoCloseable, CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>

public class FedXZeroLengthPathIteration
extends LookAheadIteration<BindingSet,QueryEvaluationException>

An iteration to evaluated FedXZeroLengthPath

See Also:

• ZeroLengthPathIteration

Constructor Summary

Constructors

Constructor	Description
FedXZeroLengthPathIteration(EvaluationStrategy evaluationStrategyImpl, Var subjectVar, Var objVar, Value subj, Value obj, Var contextVar, BindingSet bindings, QueryEvaluationContext context, QueryInfo queryInfo, List<StatementSource> statementSources)

Method Summary

Modifier and Type	Method	Description
Var	createAnonVar(String varName)
protected BindingSet	getNextElement()	Gets the next element.

Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration

handleClose, hasNext, next, remove

Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration

close, isClosed

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration

stream

Constructor Details

FedXZeroLengthPathIteration

public FedXZeroLengthPathIteration(EvaluationStrategy evaluationStrategyImpl,
 Var subjectVar,
 Var objVar,
 Value subj,
 Value obj,
 Var contextVar,
 BindingSet bindings,
 QueryEvaluationContext context,
 QueryInfo queryInfo,
 List<StatementSource> statementSources)

Method Details

getNextElement

protected BindingSet getNextElement()
                             throws QueryEvaluationException

Description copied from class: LookAheadIteration

Gets the next element. Subclasses should implement this method so that it returns the next element.

Specified by:

getNextElement in class LookAheadIteration<BindingSet,QueryEvaluationException>

Returns:

The next element, or null if no more elements are available.

Throws:

QueryEvaluationException

createAnonVar

public Var createAnonVar(String varName)