Class QueryContextIteration

java.lang.Object

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

org.eclipse.rdf4j.query.algebra.evaluation.iterator.QueryContextIteration

All Implemented Interfaces:

AutoCloseable, Iterator<BindingSet>, CloseableIteration<BindingSet>

public class QueryContextIteration
extends AbstractCloseableIteration<BindingSet>

Makes a QueryContext available during iteration.

Field Summary

Fields inherited from interface CloseableIteration

EMPTY_STATEMENT_ITERATION

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

Constructor Summary

Constructors

Constructor	Description
QueryContextIteration(CloseableIteration<? extends BindingSet> iter, QueryContext queryContext)

Method Summary

Modifier and Type	Method	Description
void	handleClose()	Called by AbstractCloseableIteration.close() when it is called for the first time.
boolean	hasNext()
BindingSet	next()
void	remove()

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<BindingSet>	stream()	Convert the results to a Java 8 Stream.

Methods inherited from interface Iterator

forEachRemaining

Constructor Details

QueryContextIteration

public QueryContextIteration(CloseableIteration<? extends BindingSet> iter,
 QueryContext queryContext)

Method Details

hasNext

public boolean hasNext()
                throws QueryEvaluationException

Throws:

QueryEvaluationException

next

public BindingSet next()
                throws QueryEvaluationException

Throws:

QueryEvaluationException

remove

public void remove()
            throws QueryEvaluationException

Throws:

QueryEvaluationException

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.

Specified by:

handleClose in class AbstractCloseableIteration<BindingSet>

Throws:

QueryEvaluationException