org.eclipse.rdf4j.common.iteration

Class AbstractCloseableIteration<E,X extends Exception>

java.lang.Object

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

All Implemented Interfaces:

AutoCloseable, CloseableIteration<E,X>, Iteration<E,X>

Direct Known Subclasses:

CloseableIterationBase, CloseableIteratorIteration, CloseDependentConnectionIteration, CollectionIteration, ConvertingIteration, DelayedIteration, EmptyIteration, ExceptionConvertingIteration, GraphToBindingSetConversionIteration, IterationWrapper, LookAheadIteration, PrintingIteration, QueryContextIteration, QueryResultIteration, RepositoryResult, SingleBindingSetIteration, SingletonIteration, StatementConversionIteration, StopRemainingExecutionsOnCloseIteration

public abstract class AbstractCloseableIteration<E,X extends Exception>
extends Object
implements CloseableIteration<E,X>

Base class for CloseableIterations offering common functionality. This class keeps track of whether the iteration has been closed and handles multiple calls to close() by ignoring all but the first call.

Constructor Summary

Constructors

Constructor and Description
AbstractCloseableIteration()

Method Summary

Modifier and Type	Method and Description
void	close() Calls handleClose() upon first call and makes sure the resource closures are only executed once.
protected void	handleClose() Called by close() when it is called for the first time.
boolean	isClosed() Checks whether this CloseableIteration has been closed.

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.Iteration

hasNext, next, remove, stream

Constructor Detail

AbstractCloseableIteration

public AbstractCloseableIteration()

Method Detail

isClosed

public final boolean isClosed()

Checks whether this CloseableIteration has been closed.

Returns:

true if the CloseableIteration has been closed, false otherwise.

close

public final void close()
                 throws X extends Exception

Calls handleClose() upon first call and makes sure the resource closures are only executed once.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface CloseableIteration<E,X extends Exception>

Throws:

X extends Exception

handleClose

protected void handleClose()
                    throws X extends Exception

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

Throws:

X

X extends Exception