org.eclipse.rdf4j.common.iteration

Class DistinctIteration<E,X extends Exception>

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>

org.eclipse.rdf4j.common.iteration.IterationWrapper<E,X>

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

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

All Implemented Interfaces:

AutoCloseable, CloseableIteration<E,X>, Iteration<E,X>

Direct Known Subclasses:

LimitedSizeDistinctIteration

public class DistinctIteration<E,X extends Exception>
extends FilterIteration<E,X>

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

Field Summary

Fields inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper

wrappedIter

Constructor Summary

Constructors

Constructor and Description
DistinctIteration(Iteration<? extends E,? extends X> iter) Creates a new DistinctIterator.

Method Summary

Modifier and Type	Method and Description
protected boolean	accept(E object) Returns true if the specified object hasn't been seen before.
protected boolean	add(E object)
protected Set<E>	makeSet()

Methods inherited from class org.eclipse.rdf4j.common.iteration.FilterIteration

handleClose, hasNext, next

Methods inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper

remove

Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration

close, isClosed

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.common.iteration.Iteration

stream

Constructor Detail

DistinctIteration

public DistinctIteration(Iteration<? extends E,? extends X> iter)

Creates a new DistinctIterator.

Parameters:

iter - The underlying iterator.

Method Detail

accept

protected boolean accept(E object)
                  throws X extends Exception

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

Specified by:

accept in class FilterIteration<E,X extends Exception>

Parameters:

object - The object to be tested.

Returns:

true if the object should be returned, false otherwise.

Throws:

X

X extends Exception

add

protected boolean add(E object)
               throws X extends Exception

Parameters:

object - to put into the set

Throws:

X extends Exception

makeSet

protected Set<E> makeSet()