org.openrdf.query.algebra.evaluation.iterator

Class ProjectionIterator

java.lang.Object

info.aduna.iteration.CloseableIterationBase<T,X>

info.aduna.iteration.ConvertingIteration<BindingSet,BindingSet,QueryEvaluationException>

org.openrdf.query.algebra.evaluation.iterator.ProjectionIterator

All Implemented Interfaces:

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

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and 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)

Methods inherited from class info.aduna.iteration.ConvertingIteration

handleClose, hasNext, next, remove

Methods inherited from class info.aduna.iteration.CloseableIterationBase

close, isClosed

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProjectionIterator

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

Throws:

QueryEvaluationException

Method Detail

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)