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<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>

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

All Implemented Interfaces:

AutoCloseable, org.eclipse.rdf4j.common.iteration.CloseableIteration<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>, org.eclipse.rdf4j.common.iteration.Iteration<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>

Direct Known Subclasses:

LimitedSizePathIterator

public class PathIteration
extends org.eclipse.rdf4j.common.iteration.LookAheadIteration<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	PathIteration.ValuePair

Constructor Summary

Constructors

Constructor and Description
PathIteration(StrictEvaluationStrategy evaluationStrategyImpl, org.eclipse.rdf4j.query.algebra.StatementPattern.Scope scope, org.eclipse.rdf4j.query.algebra.Var startVar, org.eclipse.rdf4j.query.algebra.TupleExpr pathExpression, org.eclipse.rdf4j.query.algebra.Var endVar, org.eclipse.rdf4j.query.algebra.Var contextVar, long minLength, org.eclipse.rdf4j.query.BindingSet bindings)

Method Summary

Modifier and Type	Method and Description
protected boolean	add(Set<PathIteration.ValuePair> valueSet, PathIteration.ValuePair vp)
protected boolean	addToQueue(Queue<PathIteration.ValuePair> valueQueue2, PathIteration.ValuePair vp)
org.eclipse.rdf4j.query.algebra.Var	createAnonVar(String varName)
protected org.eclipse.rdf4j.query.BindingSet	getNextElement()
protected void	handleClose()
protected boolean	isUnbound(org.eclipse.rdf4j.query.algebra.Var var, org.eclipse.rdf4j.query.BindingSet bindings)
protected Queue<PathIteration.ValuePair>	makeQueue()
protected Set<PathIteration.ValuePair>	makeSet()

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

Constructor Detail

PathIteration

public PathIteration(StrictEvaluationStrategy evaluationStrategyImpl,
                     org.eclipse.rdf4j.query.algebra.StatementPattern.Scope scope,
                     org.eclipse.rdf4j.query.algebra.Var startVar,
                     org.eclipse.rdf4j.query.algebra.TupleExpr pathExpression,
                     org.eclipse.rdf4j.query.algebra.Var endVar,
                     org.eclipse.rdf4j.query.algebra.Var contextVar,
                     long minLength,
                     org.eclipse.rdf4j.query.BindingSet bindings)
              throws org.eclipse.rdf4j.query.QueryEvaluationException

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

Method Detail

getNextElement

protected org.eclipse.rdf4j.query.BindingSet getNextElement()
                                                     throws org.eclipse.rdf4j.query.QueryEvaluationException

Specified by:

getNextElement in class org.eclipse.rdf4j.common.iteration.LookAheadIteration<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

handleClose

protected void handleClose()
                    throws org.eclipse.rdf4j.query.QueryEvaluationException

Overrides:

handleClose in class org.eclipse.rdf4j.common.iteration.LookAheadIteration<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

addToQueue

protected boolean addToQueue(Queue<PathIteration.ValuePair> valueQueue2,
                             PathIteration.ValuePair vp)
                      throws org.eclipse.rdf4j.query.QueryEvaluationException

Parameters:

valueQueue2 -

vp -

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

add

protected boolean add(Set<PathIteration.ValuePair> valueSet,
                      PathIteration.ValuePair vp)
               throws org.eclipse.rdf4j.query.QueryEvaluationException

Parameters:

valueSet -

vp -

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

isUnbound

protected boolean isUnbound(org.eclipse.rdf4j.query.algebra.Var var,
                            org.eclipse.rdf4j.query.BindingSet bindings)

makeSet

protected Set<PathIteration.ValuePair> makeSet()

makeQueue

protected Queue<PathIteration.ValuePair> makeQueue()

createAnonVar

public org.eclipse.rdf4j.query.algebra.Var createAnonVar(String varName)