org.openrdf.query.algebra.evaluation.iterator

Class DescribeIteration

java.lang.Object

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

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

org.openrdf.query.algebra.evaluation.iterator.DescribeIteration

All Implemented Interfaces:

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

public class DescribeIteration
extends LookAheadIteration<BindingSet,QueryEvaluationException>

Iteration that implements a simplified version of Symmetric Concise Bounded Description (omitting reified statements).

Since:

2.7.4

Author:

Jeen Broekstra

See Also:

Concise Bounded Description - alternatives

Constructor Summary

Constructors

Constructor and Description
DescribeIteration(Iteration<BindingSet,QueryEvaluationException> sourceIter, EvaluationStrategy strategy, Set<String> describeExprNames, BindingSet parentBindings)

Method Summary

Modifier and Type	Method and Description
protected BindingSet	getNextElement()

Methods inherited from class info.aduna.iteration.LookAheadIteration

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

DescribeIteration

public DescribeIteration(Iteration<BindingSet,QueryEvaluationException> sourceIter,
                         EvaluationStrategy strategy,
                         Set<String> describeExprNames,
                         BindingSet parentBindings)

Method Detail

getNextElement

protected BindingSet getNextElement()
                             throws QueryEvaluationException

Specified by:

getNextElement in class LookAheadIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException