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

Class ProjectionIterator

java.lang.Object

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

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

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

All Implemented Interfaces:

AutoCloseable, Iterator<BindingSet>, CloseableIteration<BindingSet>

public class ProjectionIterator
extends ConvertingIteration<BindingSet,BindingSet>

Constructor Summary

Constructors

Constructor	Description
ProjectionIterator(Projection projection, CloseableIteration<BindingSet> 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.CloseableIteration

stream

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Details

ProjectionIterator

public ProjectionIterator(Projection projection,
 CloseableIteration<BindingSet> 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>

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)