Class LookAheadIteration<E,X extends Exception>
java.lang.Object
org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>
org.eclipse.rdf4j.common.iteration.LookAheadIteration<E,X>
- All Implemented Interfaces:
AutoCloseable,CloseableIteration<E,,X> Iteration<E,X>
- Direct Known Subclasses:
BottomUpJoinIterator,CrossProductIteration,DescribeIteration,DistinctModelReducingUnionIteration,FedXPathIteration,FedXZeroLengthPathIteration,FilteringIteration,HashJoinIteration,IndependentJoingroupBindingsIteration,IndependentJoingroupBindingsIteration2,IndependentJoingroupBindingsIteration3,JoinExecutorBase,JoinIterator,LeftJoinIterator,MemTripleIterator,MultiProjectionIterator,ParallelExecutorBase,ParallelServiceExecutor,PathIteration,QueueIteration,SPARQLCrossProductIteration,UnionIteration,ZeroLengthPathIteration
@Deprecated(since="4.1.0")
public abstract class LookAheadIteration<E,X extends Exception>
extends AbstractCloseableIteration<E,X>
Deprecated.
An Iteration that looks one element ahead, if necessary, to handle calls to
hasNext(). This is a convenient
super class for Iterations that have no easy way to tell if there are any more results, but still should implement
the java.util.Iteration interface.-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected abstract EDeprecated.Gets the next element.protected voidDeprecated.Called byAbstractCloseableIteration.close()when it is called for the first time.final booleanhasNext()Deprecated.Returns true if the iteration has more elements.final Enext()Deprecated.Returns the next element in the iteration.voidremove()Deprecated.Throws anUnsupportedOperationException.Methods 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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LookAheadIteration
protected LookAheadIteration()Deprecated.
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Method Details
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getNextElement
Deprecated.Gets the next element. Subclasses should implement this method so that it returns the next element. -
hasNext
Deprecated.Description copied from interface:IterationReturns true if the iteration has more elements. (In other words, returns true ifIteration.next()would return an element rather than throwing a NoSuchElementException.)- Returns:
- true if the iteration has more elements.
- Throws:
X
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next
Deprecated.Description copied from interface:IterationReturns the next element in the iteration. -
remove
public void remove()Deprecated.Throws anUnsupportedOperationException. -
handleClose
Deprecated.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 classAbstractCloseableIteration<E,X extends Exception> - Throws:
X
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