org.openrdf.query.algebra.evaluation.iterator

Class ZeroLengthPathIteration

java.lang.Object

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

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

org.openrdf.query.algebra.evaluation.iterator.ZeroLengthPathIteration

All Implemented Interfaces:

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

Direct Known Subclasses:

LimitedSizeZeroLengthPathIteration

public class ZeroLengthPathIteration
extends LookAheadIteration<BindingSet,QueryEvaluationException>

Constructor Summary

Constructors

Constructor and Description
ZeroLengthPathIteration(EvaluationStrategyImpl evaluationStrategyImpl, Var subjectVar, Var objVar, Value subj, Value obj, Var contextVar, BindingSet bindings)

Method Summary

Modifier and Type	Method and Description
protected boolean	add(Set<Value> reportedValues2, Value v) add param v to the set reportedValues2
Var	createAnonVar(String varName)
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

ZeroLengthPathIteration

public ZeroLengthPathIteration(EvaluationStrategyImpl evaluationStrategyImpl,
                               Var subjectVar,
                               Var objVar,
                               Value subj,
                               Value obj,
                               Var contextVar,
                               BindingSet bindings)

Method Detail

getNextElement

protected BindingSet getNextElement()
                             throws QueryEvaluationException

Specified by:

getNextElement in class LookAheadIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

add

protected boolean add(Set<Value> reportedValues2,
                      Value v)
               throws QueryEvaluationException

add param v to the set reportedValues2

Parameters:

reportedValues2 -

v -

Returns:

true if v added to set and not yet present

Throws:

QueryEvaluationException

createAnonVar

public Var createAnonVar(String varName)