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>
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Nested Class Summary
Nested Classes -
Constructor Summary
ConstructorsConstructorDescriptionPathIteration(EvaluationStrategy strategy, StatementPattern.Scope scope, Var startVar, TupleExpr pathExpression, Var endVar, Var contextVar, long minLength, BindingSet bindings) -
Method Summary
Modifier and TypeMethodDescriptionprotected booleanadd(Set<PathIteration.ValuePair> valueSet, PathIteration.ValuePair vp) protected booleanaddToQueue(Queue<PathIteration.ValuePair> valueQueue2, PathIteration.ValuePair vp) createAnonVar(String varName) protected BindingSetGets the next element.protected voidCalled byAbstractCloseableIteration.close()when it is called for the first time.protected booleanisUnbound(Var var, BindingSet bindings) Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration
hasNext, next, removeMethods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosedMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration
stream
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Constructor Details
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PathIteration
public PathIteration(EvaluationStrategy strategy, StatementPattern.Scope scope, Var startVar, TupleExpr pathExpression, Var endVar, Var contextVar, long minLength, BindingSet bindings) throws QueryEvaluationException - Throws:
QueryEvaluationException
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Method Details
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getNextElement
Description copied from class:LookAheadIterationGets the next element. Subclasses should implement this method so that it returns the next element.- Specified by:
getNextElementin classLookAheadIteration<BindingSet,QueryEvaluationException> - Returns:
- The next element, or null if no more elements are available.
- Throws:
QueryEvaluationException
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handleClose
Description copied from class:AbstractCloseableIterationCalled byAbstractCloseableIteration.close()when it is called for the first time. This method is only called once on each iteration. By default, this method does nothing.- Overrides:
handleClosein classLookAheadIteration<BindingSet,QueryEvaluationException> - Throws:
QueryEvaluationException
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addToQueue
protected boolean addToQueue(Queue<PathIteration.ValuePair> valueQueue2, PathIteration.ValuePair vp) throws QueryEvaluationException - Parameters:
valueQueue2-vp-- Throws:
QueryEvaluationException
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add
protected boolean add(Set<PathIteration.ValuePair> valueSet, PathIteration.ValuePair vp) throws QueryEvaluationException - Parameters:
valueSet-vp-- Throws:
QueryEvaluationException
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isUnbound
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createAnonVar
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