Package org.eclipse.rdf4j.federated.evaluation.iterator

Class FilteringIteration

java.lang.Object

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

org.eclipse.rdf4j.federated.evaluation.iterator.FilteringIteration

All Implemented Interfaces:

AutoCloseable, Iterator<BindingSet>, CloseableIteration<BindingSet>

public class FilteringIteration
extends FilterIteration<BindingSet>

Filters iteration according to specified filterExpr.

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field	Description
protected final FilterValueExpr	filterExpr
protected final FederationEvalStrategy	strategy

Constructor Summary

Constructors

Constructor	Description
FilteringIteration(FilterValueExpr filterExpr, CloseableIteration<BindingSet> iter, FederationEvalStrategy 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 final 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

Field Details

filterExpr

protected final FilterValueExpr filterExpr

strategy

protected final FederationEvalStrategy strategy

Constructor Details

FilteringIteration

public FilteringIteration(FilterValueExpr filterExpr,
 CloseableIteration<BindingSet> iter,
 FederationEvalStrategy 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 final 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>