Class LockingIteration<E>

java.lang.Object

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

org.eclipse.rdf4j.common.iteration.IterationWrapper<E>

org.eclipse.rdf4j.common.concurrent.locks.LockingIteration<E>

All Implemented Interfaces:

AutoCloseable, Iterator<E>, CloseableIteration<E>

public class LockingIteration<E>
extends IterationWrapper<E>

An Iteration that holds on to a lock until the Iteration is closed. Upon closing, the underlying Iteration is closed before the lock is released. This iterator closes itself as soon as all elements have been read.

Field Summary

Fields inherited from class IterationWrapper

wrappedIter

Modifier and Type	Field	Description
protected final CloseableIteration<? extends E>	wrappedIter	Deprecated. This will be changed to private, possibly with an accessor in future.

Fields inherited from interface CloseableIteration

EMPTY_STATEMENT_ITERATION

Modifier and Type	Field	Description
static final EmptyIteration<Statement>	EMPTY_STATEMENT_ITERATION

Method Summary

Modifier and Type	Method	Description
static <T, R extends Exception> CloseableIteration<T>	getInstance(Lock lock, CloseableIteration<T> iter)
protected void	handleClose()	Closes this Iteration and also closes the wrapped Iteration if it is a CloseableIteration.

Methods inherited from class IterationWrapper

hasNext, next, remove

Modifier and Type	Method	Description
boolean	hasNext()	Deprecated. Checks whether the wrapped Iteration contains more elements, closing this Iteration when this is not the case.
E	next()	Deprecated. Returns the next element from the wrapped Iteration.
void	remove()	Deprecated. Removes the last element that has been returned from the wrapped Iteration.

Methods inherited from class AbstractCloseableIteration

close, isClosed

Modifier and Type	Method	Description
final void	close()	Calls AbstractCloseableIteration.handleClose() upon first call and makes sure the resource closures are only executed once.
final boolean	isClosed()	Checks whether this CloseableIteration has been closed.

Methods inherited from class Object

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

Methods inherited from interface CloseableIteration

stream

Modifier and Type	Method	Description
default Stream<E>	stream()	Convert the results to a Java 8 Stream.

Methods inherited from interface Iterator

forEachRemaining

Method Details

getInstance

public static <T, R extends Exception>
CloseableIteration<T> getInstance(Lock lock,
 CloseableIteration<T> iter)

handleClose

protected void handleClose()

Description copied from class: IterationWrapper

Closes this Iteration and also closes the wrapped Iteration if it is a CloseableIteration.

Overrides:

handleClose in class IterationWrapper<E>