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

Class BadlyDesignedLeftJoinIterator

java.lang.Object

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

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.CloseableIteration

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