Class FedXQueueCursor<T>

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<CloseableIteration<T>>

org.eclipse.rdf4j.common.iteration.LookAheadIteration<CloseableIteration<T>>

org.eclipse.rdf4j.common.iteration.QueueIteration<CloseableIteration<T>, QueryEvaluationException>

org.eclipse.rdf4j.query.impl.QueueCursor<CloseableIteration<T>>

org.eclipse.rdf4j.federated.evaluation.concurrent.FedXQueueCursor<T>

Type Parameters:

T -

All Implemented Interfaces:

AutoCloseable, Iterator<CloseableIteration<T>>, CloseableIteration<CloseableIteration<T>>

public class FedXQueueCursor<T>
extends QueueCursor<CloseableIteration<T>>

Specialized variants of QueueCursor which avoids converting any exception if it is already of typeQueryEvaluationException.

Author:

Andreas Schwarte

Field Summary

Fields inherited from interface CloseableIteration

EMPTY_STATEMENT_ITERATION

Method Summary

Modifier and Type	Method	Description
protected QueryEvaluationException	convert(Exception e)	Converts an exception from the underlying iteration to an exception of type X.
static <T> FedXQueueCursor<T>	create(int capacity)
static <T> FedXQueueCursor<T>	create(int capacity, WeakReference<?> callerReference)
void	handleClose()	Called by AbstractCloseableIteration.close() when it is called for the first time.

Methods inherited from class QueueIteration

checkException, done, getNextElement, put, toss

Methods inherited from class LookAheadIteration

hasNext, next, remove

Methods inherited from class AbstractCloseableIteration

close, isClosed

Methods inherited from class Object

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

Methods inherited from interface CloseableIteration

stream

Methods inherited from interface Iterator

forEachRemaining

Method Details

create

public static <T> FedXQueueCursor<T> create(int capacity,
 WeakReference<?> callerReference)

create

public static <T> FedXQueueCursor<T> create(int capacity)

convert

protected QueryEvaluationException convert(Exception e)

Description copied from class: QueueIteration

Converts an exception from the underlying iteration to an exception of type X.

Overrides:

convert in class QueueCursor<CloseableIteration<T>>

handleClose

public void handleClose()
                 throws QueryEvaluationException

Description copied from class: AbstractCloseableIteration

Called by AbstractCloseableIteration.close() when it is called for the first time. This method is only called once on each iteration. By default, this method does nothing.

Overrides:

handleClose in class QueueIteration<CloseableIteration<T>, QueryEvaluationException>

Throws:

QueryEvaluationException