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

Class BadlyDesignedLeftJoinIterator

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

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

All Implemented Interfaces:

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

public class BadlyDesignedLeftJoinIterator
extends LeftJoinIterator

Author:

Arjohn Kampman

Constructor Summary

Constructors

Constructor	Description
BadlyDesignedLeftJoinIterator(EvaluationStrategy strategy, LeftJoin join, BindingSet inputBindings, Set<String> problemVars, QueryEvaluationContext context)
BadlyDesignedLeftJoinIterator(QueryEvaluationStep left, QueryEvaluationStep right, QueryValueEvaluationStep joinCondition, BindingSet inputBindings, Set<String> problemVars)

Method Summary

Modifier and Type	Method	Description
protected BindingSet	getNextElement()	Gets the next element.

Methods inherited from class org.eclipse.rdf4j.query.algebra.evaluation.iterator.LeftJoinIterator

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.Iteration

stream

Constructor Details

BadlyDesignedLeftJoinIterator

public BadlyDesignedLeftJoinIterator(EvaluationStrategy strategy,
 LeftJoin join,
 BindingSet inputBindings,
 Set<String> problemVars,
 QueryEvaluationContext context)
                              throws QueryEvaluationException

Throws:

QueryEvaluationException

BadlyDesignedLeftJoinIterator

public BadlyDesignedLeftJoinIterator(QueryEvaluationStep left,
 QueryEvaluationStep right,
 QueryValueEvaluationStep joinCondition,
 BindingSet inputBindings,
 Set<String> problemVars)
                              throws QueryEvaluationException

Throws:

QueryEvaluationException

Method Details

getNextElement

protected BindingSet getNextElement()
                             throws QueryEvaluationException

Description copied from class: LookAheadIteration

Gets the next element. Subclasses should implement this method so that it returns the next element.

Overrides:

getNextElement in class LeftJoinIterator

Returns:

The next element, or null if no more elements are available.

Throws:

QueryEvaluationException