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package de.lmu.ifi.dbs.elki.distance.distancefunction;
/*
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/>.
*/
import de.lmu.ifi.dbs.elki.database.query.distance.DistanceQuery;
import de.lmu.ifi.dbs.elki.index.Index;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.OptionID;
/**
* Distance function relying on an index (such as preprocessed neighborhoods).
*
* @author Erich Schubert
*
* @apiviz.landmark
* @apiviz.stereotype factory
* @apiviz.has Instance oneway - - «create»
*
* @param <O> Object type
*/
public interface IndexBasedDistanceFunction<O> extends DistanceFunction<O> {
/**
* OptionID for the index parameter
*/
public static final OptionID INDEX_ID = new OptionID("distancefunction.index", "Distance index to use.");
/**
* Instance interface for Index based distance functions.
*
* @author Erich Schubert
*
* @param <T> Object type
*/
public static interface Instance<T, I extends Index> extends DistanceQuery<T> {
/**
* Get the index used.
*
* @return the index used
*/
public I getIndex();
}
}
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