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

Class LeftJoinIterator

java.lang.Object

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

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

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

All Implemented Interfaces:

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

Direct Known Subclasses:

BadlyDesignedLeftJoinIterator

public class LeftJoinIterator
extends LookAheadIteration<BindingSet,QueryEvaluationException>

Constructor Summary

Constructors

Constructor	Description
LeftJoinIterator(EvaluationStrategy strategy, LeftJoin join, BindingSet bindings, QueryEvaluationContext context)
LeftJoinIterator(QueryEvaluationStep left, QueryEvaluationStep right, QueryValueEvaluationStep joinCondition, BindingSet bindings, Set<String> scopeBindingNamse)

Method Summary

Modifier and Type	Method	Description
protected BindingSet	getNextElement()
protected void	handleClose()

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

hasNext, next, 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.CloseableIteration

stream

Constructor Detail

LeftJoinIterator

public LeftJoinIterator(EvaluationStrategy strategy,
                        LeftJoin join,
                        BindingSet bindings,
                        QueryEvaluationContext context)
                 throws QueryEvaluationException

Throws:

QueryEvaluationException

LeftJoinIterator

public LeftJoinIterator(QueryEvaluationStep left,
                        QueryEvaluationStep right,
                        QueryValueEvaluationStep joinCondition,
                        BindingSet bindings,
                        Set<String> scopeBindingNamse)
                 throws QueryEvaluationException

Throws:

QueryEvaluationException

Method Detail

getNextElement

protected BindingSet getNextElement()
                             throws QueryEvaluationException

Specified by:

getNextElement in class LookAheadIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

handleClose

protected void handleClose()
                    throws QueryEvaluationException

Overrides:

handleClose in class LookAheadIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException