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

Class PathIteration

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>

org.eclipse.rdf4j.common.iteration.LookAheadIteration<BindingSet,QueryEvaluationException>

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

All Implemented Interfaces:

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

public class PathIteration
extends LookAheadIteration<BindingSet,QueryEvaluationException>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	PathIteration.ValuePair

Constructor Summary

Constructors

Constructor	Description
PathIteration(EvaluationStrategy strategy, StatementPattern.Scope scope, Var startVar, TupleExpr pathExpression, Var endVar, Var contextVar, long minLength, BindingSet bindings)

Method Summary

Modifier and Type	Method	Description
protected boolean	add(Set<PathIteration.ValuePair> valueSet, PathIteration.ValuePair vp)
protected boolean	addToQueue(Queue<PathIteration.ValuePair> valueQueue2, PathIteration.ValuePair vp)
Var	createAnonVar(String varName)
protected BindingSet	getNextElement()
protected void	handleClose()
protected boolean	isUnbound(Var var, BindingSet bindings)

Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration

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

Constructor Detail

PathIteration

public PathIteration(EvaluationStrategy strategy,
                     StatementPattern.Scope scope,
                     Var startVar,
                     TupleExpr pathExpression,
                     Var endVar,
                     Var contextVar,
                     long minLength,
                     BindingSet bindings)
              throws QueryEvaluationException

Throws:

QueryEvaluationException

Method Detail

getNextElement

protected BindingSet getNextElement()
                             throws QueryEvaluationException

Specified by:

getNextElement in class LookAheadIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

handleClose

protected void handleClose()
                    throws QueryEvaluationException

Overrides:

handleClose in class LookAheadIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

addToQueue

protected boolean addToQueue(Queue<PathIteration.ValuePair> valueQueue2,
                             PathIteration.ValuePair vp)
                      throws QueryEvaluationException

Parameters:

valueQueue2 -

vp -

Throws:

QueryEvaluationException

add

protected boolean add(Set<PathIteration.ValuePair> valueSet,
                      PathIteration.ValuePair vp)
               throws QueryEvaluationException

Parameters:

valueSet -

vp -

Throws:

QueryEvaluationException

isUnbound

protected boolean isUnbound(Var var,
                            BindingSet bindings)

createAnonVar

public Var createAnonVar(String varName)