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

Class ProjectionIterator

java.lang.Object

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

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

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

All Implemented Interfaces:

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

public class ProjectionIterator
extends ConvertingIteration<BindingSet,BindingSet,QueryEvaluationException>

Constructor Summary

Constructors

Constructor	Description
ProjectionIterator(Projection projection, CloseableIteration<BindingSet,QueryEvaluationException> iter, BindingSet parentBindings, QueryEvaluationContext context)

Method Summary

Modifier and Type	Method	Description
protected BindingSet	convert(BindingSet sourceBindings)	Converts a source type object to a target type object.
static BindingSet	project(ProjectionElemList projElemList, BindingSet sourceBindings, BindingSet parentBindings)
static BindingSet	project(ProjectionElemList projElemList, BindingSet sourceBindings, BindingSet parentBindings, boolean includeAllParentBindings)

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

handleClose, 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

ProjectionIterator

public ProjectionIterator(Projection projection,
 CloseableIteration<BindingSet,QueryEvaluationException> iter,
 BindingSet parentBindings,
 QueryEvaluationContext context)
                   throws QueryEvaluationException

Throws:

QueryEvaluationException

Method Details

convert

protected BindingSet convert(BindingSet sourceBindings)
                      throws QueryEvaluationException

Description copied from class: ConvertingIteration

Converts a source type object to a target type object.

Specified by:

convert in class ConvertingIteration<BindingSet,BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

project

public static BindingSet project(ProjectionElemList projElemList,
 BindingSet sourceBindings,
 BindingSet parentBindings)

project

public static BindingSet project(ProjectionElemList projElemList,
 BindingSet sourceBindings,
 BindingSet parentBindings,
 boolean includeAllParentBindings)