Class DistinctIteration<E>

java.lang.Object

org.eclipse.rdf4j.common.iteration.FilterIteration<E>

org.eclipse.rdf4j.common.iteration.DistinctIteration<E>

All Implemented Interfaces:

AutoCloseable, Iterator<E>, CloseableIteration<E>

public class DistinctIteration<E>
extends FilterIteration<E>

An Iteration that filters any duplicate elements from an underlying iterator.

Field Summary

Fields inherited from interface CloseableIteration

EMPTY_STATEMENT_ITERATION

Constructor Summary

Constructors

Constructor	Description
DistinctIteration(CloseableIteration<? extends E> iter)	Deprecated.
DistinctIteration(CloseableIteration<? extends E> iter, Supplier<Set<E>> setMaker)	Creates a new DistinctIterator.
DistinctIteration(CloseableIteration<? extends E> iter, Set<E> excludeSet)	Creates a new DistinctIterator.

Method Summary

Modifier and Type	Method	Description
protected boolean	accept(E object)	Returns true if the specified object hasn't been seen before.
protected boolean	add(E object)
protected void	handleClose()	Closes this Iteration and also closes the wrapped Iteration if it is a CloseableIteration.

Methods inherited from class FilterIteration

close, hasNext, next, remove

Methods inherited from class Object

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

Methods inherited from interface CloseableIteration

stream

Methods inherited from interface Iterator

forEachRemaining

Constructor Details

DistinctIteration

@Deprecated
public DistinctIteration(CloseableIteration<? extends E> iter)

Deprecated.

Creates a new DistinctIterator.

Parameters:

iter - The underlying iterator.

DistinctIteration

public DistinctIteration(CloseableIteration<? extends E> iter,
 Set<E> excludeSet)

Creates a new DistinctIterator.

Parameters:

iter - The underlying iterator.

Set - a hopefully optimized set

DistinctIteration

public DistinctIteration(CloseableIteration<? extends E> iter,
 Supplier<Set<E>> setMaker)

Creates a new DistinctIterator.

Parameters:

iter - The underlying iterator.

Supplier - invalid input: '<'Set> a supplier of a hopefully optimized set

Method Details

accept

protected boolean accept(E object)

Returns true if the specified object hasn't been seen before.

Specified by:

accept in class FilterIteration<E>

Parameters:

object - The object to be tested.

Returns:

true if the object should be returned, false otherwise.

handleClose

protected void handleClose()

Description copied from class: FilterIteration

Closes this Iteration and also closes the wrapped Iteration if it is a CloseableIteration.

Specified by:

handleClose in class FilterIteration<E>

add

protected boolean add(E object)

Parameters:

object - to put into the set