Class UnionIteration<E,X extends Exception>
- java.lang.Object
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- org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>
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- org.eclipse.rdf4j.common.iteration.LookAheadIteration<E,X>
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- org.eclipse.rdf4j.common.iteration.UnionIteration<E,X>
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- All Implemented Interfaces:
AutoCloseable,CloseableIteration<E,X>,Iteration<E,X>
public class UnionIteration<E,X extends Exception> extends LookAheadIteration<E,X>
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 Iteration<? extends E,X>> args)Creates a new UnionIteration that returns the bag union of the results of a number of Iterations.UnionIteration(Iteration<? extends E,X>... 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 EgetNextElement()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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Method Detail
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getNextElement
protected E getNextElement() throws X extends Exception
Description copied from class:LookAheadIterationGets the next element. Subclasses should implement this method so that it returns the next element.- Specified by:
getNextElementin classLookAheadIteration<E,X extends Exception>- Returns:
- The next element, or null if no more elements are available.
- Throws:
X extends Exception
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handleClose
protected void handleClose() throws X extends ExceptionDescription 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<E,X extends Exception>- Throws:
XX extends Exception
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