org.eclipse.rdf4j.sail.federation.evaluation

Class AlternativeCursor<E>

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>

org.eclipse.rdf4j.common.iteration.LookAheadIteration<E,org.eclipse.rdf4j.query.QueryEvaluationException>

org.eclipse.rdf4j.sail.federation.evaluation.AlternativeCursor<E>

All Implemented Interfaces:

AutoCloseable, org.eclipse.rdf4j.common.iteration.CloseableIteration<E,org.eclipse.rdf4j.query.QueryEvaluationException>, org.eclipse.rdf4j.common.iteration.Iteration<E,org.eclipse.rdf4j.query.QueryEvaluationException>

public class AlternativeCursor<E>
extends org.eclipse.rdf4j.common.iteration.LookAheadIteration<E,org.eclipse.rdf4j.query.QueryEvaluationException>

If the primary cursor is empty, use the alternative cursor.

Author:

James Leigh

Constructor Summary

Constructors

Constructor and Description
AlternativeCursor(org.eclipse.rdf4j.common.iteration.CloseableIteration<? extends E,org.eclipse.rdf4j.query.QueryEvaluationException> primary, org.eclipse.rdf4j.common.iteration.CloseableIteration<? extends E,org.eclipse.rdf4j.query.QueryEvaluationException> alternative)

Method Summary

Modifier and Type	Method and Description
E	getNextElement()
void	handleClose()
String	toString()

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

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, wait, wait, wait

Constructor Detail

AlternativeCursor

public AlternativeCursor(org.eclipse.rdf4j.common.iteration.CloseableIteration<? extends E,org.eclipse.rdf4j.query.QueryEvaluationException> primary,
                         org.eclipse.rdf4j.common.iteration.CloseableIteration<? extends E,org.eclipse.rdf4j.query.QueryEvaluationException> alternative)

Method Detail

handleClose

public void handleClose()
                 throws org.eclipse.rdf4j.query.QueryEvaluationException

Overrides:

handleClose in class org.eclipse.rdf4j.common.iteration.LookAheadIteration<E,org.eclipse.rdf4j.query.QueryEvaluationException>

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

getNextElement

public E getNextElement()
                 throws org.eclipse.rdf4j.query.QueryEvaluationException

Specified by:

getNextElement in class org.eclipse.rdf4j.common.iteration.LookAheadIteration<E,org.eclipse.rdf4j.query.QueryEvaluationException>

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

toString

public String toString()

Overrides:

toString in class Object