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package de.lmu.ifi.dbs.elki.utilities.datastructures.iterator;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Array iterators can also go backwards and seek.
*
* @author Erich Schubert
*
* @apiviz.excludeSubtypes
*/
public interface ArrayIter extends Iter {
@Override
ArrayIter advance();
/**
* Moves the iterator forward or backward by the given offset.
*
* @param count offset to move forward or backwards
* @return Iterator
*/
ArrayIter advance(int count);
/**
* Moves the iterator backward to the previous entry.
*
* @return Iterator
*/
ArrayIter retract();
/**
* Moves the iterator to the given position
*
* @param off Seek offset
* @return Iterator
*/
ArrayIter seek(int off);
/**
* Get current iterator offset.
*
* @return Iterator position
*/
int getOffset();
}
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