Class FilterIteration<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.IterationWrapper<E,X>
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- org.eclipse.rdf4j.common.iteration.FilterIteration<E,X>
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- All Implemented Interfaces:
AutoCloseable,CloseableIteration<E,X>,Iteration<E,X>
- Direct Known Subclasses:
CompatibleBindingSetFilter,DistinctIteration,FilteringIteration,FilterIterator,IntersectIteration,MinusIteration,OffsetIteration,ReducedIteration,SPARQLMinusIteration
public abstract class FilterIteration<E,X extends Exception> extends IterationWrapper<E,X>
A CloseableIteration that wraps another Iteration, applying a filter on the objects that are returned. Subclasses must implement the accept method to indicate which objects should be returned.
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Field Summary
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Fields inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper
wrappedIter
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Constructor Summary
Constructors Modifier Constructor Description protectedFilterIteration(Iteration<? extends E,? extends X> iter)
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description protected abstract booleanaccept(E object)Tests whether or not the specified object should be returned by this Iteration.protected voidhandleClose()Closes this Iteration and also closes the wrapped Iteration if it is aCloseableIteration.booleanhasNext()Checks whether the wrapped Iteration contains more elements, closing this Iteration when this is not the case.Enext()Returns the next element from the wrapped Iteration.-
Methods inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper
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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hasNext
public boolean hasNext() throws X extends ExceptionDescription copied from class:IterationWrapperChecks whether the wrapped Iteration contains more elements, closing this Iteration when this is not the case.
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next
public E next() throws X extends Exception
Description copied from class:IterationWrapperReturns the next element from the wrapped Iteration.
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accept
protected abstract boolean accept(E object) throws X extends Exception
Tests whether or not the specified object should be returned by this Iteration. All objects from the wrapped Iteration pass through this method in the same order as they are coming from the wrapped Iteration.
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handleClose
protected void handleClose() throws X extends ExceptionDescription copied from class:IterationWrapperCloses this Iteration and also closes the wrapped Iteration if it is aCloseableIteration.- Overrides:
handleClosein classIterationWrapper<E,X extends Exception>- Throws:
XX extends Exception
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