Class UnionIteration<E>
- java.lang.Object
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- org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E>
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- org.eclipse.rdf4j.common.iteration.LookAheadIteration<E>
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- org.eclipse.rdf4j.common.iteration.UnionIteration<E>
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- All Implemented Interfaces:
AutoCloseable
,Iterator<E>
,CloseableIteration<E>
public class UnionIteration<E> extends LookAheadIteration<E>
An Iteration that returns the bag union of the results of a number of Iterations. 'Bag union' means that the UnionIteration does not filter duplicate objects.
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Constructor Summary
Constructors Constructor Description UnionIteration(Iterable<? extends CloseableIteration<? extends E>> args)
Creates a new UnionIteration that returns the bag union of the results of a number of Iterations.UnionIteration(CloseableIteration<? extends E>... args)
Creates a new UnionIteration that returns the bag union of the results of a number of Iterations.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected E
getNextElement()
Gets the next element.protected void
handleClose()
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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Constructor Detail
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UnionIteration
@SafeVarargs public UnionIteration(CloseableIteration<? extends E>... args)
Creates a new UnionIteration that returns the bag union of the results of a number of Iterations.- Parameters:
args
- The Iterations containing the elements to iterate over.
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UnionIteration
public UnionIteration(Iterable<? extends CloseableIteration<? extends E>> args)
Creates a new UnionIteration that returns the bag union of the results of a number of Iterations.- Parameters:
args
- The Iterations containing the elements to iterate over.
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Method Detail
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getNextElement
protected E getNextElement()
Description copied from class:LookAheadIteration
Gets the next element. Subclasses should implement this method so that it returns the next element.- Specified by:
getNextElement
in classLookAheadIteration<E>
- Returns:
- The next element, or null if no more elements are available.
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handleClose
protected void handleClose()
Description copied from class:AbstractCloseableIteration
Called 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:
handleClose
in classAbstractCloseableIteration<E>
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