info.aduna.collections.iterators
Class IntersectIterator<E>

java.lang.Object
  info.aduna.iteration.CloseableIterationBase<E,X>
      info.aduna.iteration.IterationWrapper<E,X>
          info.aduna.iteration.FilterIteration<E,X>
              info.aduna.iteration.IntersectIteration<E,RuntimeException>
                  info.aduna.collections.iterators.IntersectIterator<E>

All Implemented Interfaces:

CloseableIterator<E>, CloseableIteration<E,RuntimeException>, Iteration<E,RuntimeException>, Closeable, Iterator<E>

public class IntersectIterator<E>
extends IntersectIteration<E,RuntimeException>
implements CloseableIterator<E>

An iterator that returns the intersection of the results of two iterators. Optionally, the iterator can be configured to filter duplicates from the returned elements.

Note that duplicates can also be filtered by wrapping this iterator in a DistinctIterator, but that has a bit more overhead as it adds a second hash table lookup.

Field Summary

Fields inherited from class info.aduna.iteration.IterationWrapper

wrappedIter

Fields inherited from class info.aduna.iteration.CloseableIterationBase

logger

Constructor Summary

IntersectIterator(Iterator<? extends E> arg1, Iterator<? extends E> arg2)
Creates a new IntersectIterator that returns the intersection of the results of two iterators.

IntersectIterator(Iterator<? extends E> arg1, Iterator<? extends E> arg2, boolean distinct)
Creates a new IntersectIterator that returns the intersection of the results of two iterators.

Method Summary

Methods inherited from class info.aduna.iteration.IntersectIteration

accept, handleClose

Methods inherited from class info.aduna.iteration.FilterIteration

hasNext, next

Methods inherited from class info.aduna.iteration.IterationWrapper

remove

Methods inherited from class info.aduna.iteration.CloseableIterationBase

close, isClosed

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface info.aduna.collections.iterators.CloseableIterator

close

Methods inherited from interface java.util.Iterator

hasNext, next, remove

Constructor Detail

IntersectIterator

public IntersectIterator(Iterator<? extends E> arg1,
                         Iterator<? extends E> arg2)

Creates a new IntersectIterator that returns the intersection of the results of two iterators. By default, duplicates are not filtered from the results.

Parameters:

arg1 - An iterator containing the first set of elements.

arg2 - An iterator containing the second set of elements.

IntersectIterator

public IntersectIterator(Iterator<? extends E> arg1,
                         Iterator<? extends E> arg2,
                         boolean distinct)

Creates a new IntersectIterator that returns the intersection of the results of two iterators.

Parameters:

arg1 - An iterator containing the first set of elements.

arg2 - An iterator containing the second set of elements.

distinct - Flag indicating whether duplicate elements should be filtered from the result.