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

Class FilteringIteration

java.lang.Object

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

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

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

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

All Implemented Interfaces:

AutoCloseable, CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>

Direct Known Subclasses:

FilteringInsertBindingsIteration

public class FilteringIteration
extends FilterIteration<BindingSet,QueryEvaluationException>

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

Fields inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper

wrappedIter

Constructor Summary

Constructors

Constructor	Description
FilteringIteration(FilterValueExpr filterExpr, CloseableIteration<BindingSet,QueryEvaluationException> 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.

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

handleClose, hasNext, next

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

remove

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

close, isClosed

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

stream

Field Details

filterExpr

protected final FilterValueExpr filterExpr

strategy

protected final FederationEvalStrategy strategy

Constructor Details

FilteringIteration

public FilteringIteration(FilterValueExpr filterExpr,
 CloseableIteration<BindingSet,QueryEvaluationException> 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,QueryEvaluationException>

Parameters:

bindings - The object to be tested.

Returns:

true if the object should be returned, false otherwise.

Throws:

QueryEvaluationException