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package de.lmu.ifi.dbs.elki.database.datastore;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2012
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/>.
*/
import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
/**
* Interface to map DBIDs to integer record ids for use in storage.
*
* @author Erich Schubert
*/
public interface DataStoreIDMap {
/**
* Map a DBID to an array offset.
*
* @param dbid DBID
* @return record id {@code id >= 0}
*/
int mapDBIDToOffset(DBIDRef dbid);
}
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