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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.data.type.SimpleTypeInformation;
/**
* Primitive distance function that is defined on some kind of object.
*
* @author Erich Schubert
*
* @apiviz.landmark
*
* @param <O> input object type
*/
public interface PrimitiveDistanceFunction<O> extends DistanceFunction<O> {
/**
* Computes the distance between two given DatabaseObjects according to this
* distance function.
*
* @param o1 first DatabaseObject
* @param o2 second DatabaseObject
* @return the distance between two given DatabaseObjects according to this
* distance function
*/
double distance(O o1, O o2);
@Override
SimpleTypeInformation<? super O> getInputTypeRestriction();
}
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