Class ZeroLengthPathIteration
- java.lang.Object
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- org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E>
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- org.eclipse.rdf4j.common.iteration.LookAheadIteration<BindingSet>
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- org.eclipse.rdf4j.query.algebra.evaluation.iterator.ZeroLengthPathIteration
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- All Implemented Interfaces:
AutoCloseable,Iterator<BindingSet>,CloseableIteration<BindingSet>
public class ZeroLengthPathIteration extends LookAheadIteration<BindingSet>
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Field Summary
Fields Modifier and Type Field Description static StringANON_OBJECT_VARstatic StringANON_PREDICATE_VARstatic StringANON_SEQUENCE_VARstatic StringANON_SUBJECT_VAR
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Constructor Summary
Constructors Constructor Description ZeroLengthPathIteration(EvaluationStrategy evaluationStrategyImpl, Var subjectVar, Var objVar, Value subj, Value obj, Var contextVar, BindingSet bindings, QueryEvaluationContext context)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description VarcreateAnonVar(String varName)protected BindingSetgetNextElement()Gets the next element.protected voidhandleClose()Called byAbstractCloseableIteration.close()when it is called for the first time.-
Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration
hasNext, next, remove
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Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosed
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration
stream
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Methods inherited from interface java.util.Iterator
forEachRemaining
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Field Detail
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ANON_SUBJECT_VAR
public static final String ANON_SUBJECT_VAR
- See Also:
- Constant Field Values
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ANON_PREDICATE_VAR
public static final String ANON_PREDICATE_VAR
- See Also:
- Constant Field Values
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ANON_OBJECT_VAR
public static final String ANON_OBJECT_VAR
- See Also:
- Constant Field Values
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ANON_SEQUENCE_VAR
public static final String ANON_SEQUENCE_VAR
- See Also:
- Constant Field Values
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Constructor Detail
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ZeroLengthPathIteration
public ZeroLengthPathIteration(EvaluationStrategy evaluationStrategyImpl, Var subjectVar, Var objVar, Value subj, Value obj, Var contextVar, BindingSet bindings, QueryEvaluationContext context)
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Method Detail
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getNextElement
protected BindingSet getNextElement() throws QueryEvaluationException
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>- Returns:
- The next element, or null if no more elements are available.
- Throws:
QueryEvaluationException
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handleClose
protected void 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.- Specified by:
handleClosein classAbstractCloseableIteration<BindingSet>
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