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

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

Method Summary

protected BindingSet	convert(BindingSet sourceBindings)
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

Specified by:

convert in class ConvertingIteration<BindingSet,BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

project

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