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

Class FilterIterator

java.lang.Object

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

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

All Implemented Interfaces:

AutoCloseable, Iterator<BindingSet>, CloseableIteration<BindingSet>

public class FilterIterator
extends FilterIteration<BindingSet>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	FilterIterator.RetainedVariableFilteredQueryEvaluationContext	This is used to make sure that no variable is seen by the filter that are not in scope.

Constructor Summary

Constructors

Constructor	Description
FilterIterator(CloseableIteration<BindingSet> iter, QueryValueEvaluationStep condition, EvaluationStrategy strategy)

Method Summary

Modifier and Type	Method	Description
protected boolean	accept(BindingSet bindings)	Tests whether or not the specified object should be returned by this Iteration.
protected void	handleClose()	Closes this Iteration and also closes the wrapped Iteration if it is a CloseableIteration.

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

close, hasNext, next, remove

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.CloseableIteration

stream

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Details

FilterIterator

public FilterIterator(CloseableIteration<BindingSet> iter,
 QueryValueEvaluationStep condition,
 EvaluationStrategy strategy)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

Method Details

accept

protected boolean accept(BindingSet bindings)
                  throws QueryEvaluationException

Description copied from class: FilterIteration

Tests whether or not the specified object should be returned by this Iteration. All objects from the wrapped Iteration pass through this method in the same order as they are coming from the wrapped Iteration.

Specified by:

accept in class FilterIteration<BindingSet>

Parameters:

bindings - The object to be tested.

Returns:

true if the object should be returned, false otherwise.

Throws:

QueryEvaluationException

handleClose

protected void handleClose()

Description copied from class: FilterIteration

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

Specified by:

handleClose in class FilterIteration<BindingSet>