package de.lmu.ifi.dbs.elki.database.query.distance;
/*
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 .
*/
import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
import de.lmu.ifi.dbs.elki.database.query.DistanceSimilarityQuery;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.distance.distancefunction.PrimitiveDistanceFunction;
import de.lmu.ifi.dbs.elki.distance.similarityfunction.PrimitiveSimilarityFunction;
/**
* Combination query class, for convenience.
*
* @author Erich Schubert
* @since 0.4.0
*
* @apiviz.uses PrimitiveSimilarityFunction
*
* @param Object type
*/
public class PrimitiveDistanceSimilarityQuery extends PrimitiveDistanceQuery implements DistanceSimilarityQuery {
/**
* Typed reference to the similarity function (usually the same as the
* distance function!)
*/
private PrimitiveSimilarityFunction super O> similarityFunction;
/**
* Constructor.
*
* @param relation Representation
* @param distanceFunction distance function
* @param similarityFunction similarity function (usually the same as the
* distance function!)
*/
public PrimitiveDistanceSimilarityQuery(Relation extends O> relation, PrimitiveDistanceFunction super O> distanceFunction, PrimitiveSimilarityFunction super O> similarityFunction) {
super(relation, distanceFunction);
this.similarityFunction = similarityFunction;
}
@Override
public double similarity(DBIDRef id1, DBIDRef id2) {
O o1 = relation.get(id1);
O o2 = relation.get(id2);
return similarity(o1, o2);
}
@Override
public double similarity(O o1, DBIDRef id2) {
O o2 = relation.get(id2);
return similarity(o1, o2);
}
@Override
public double similarity(DBIDRef id1, O o2) {
O o1 = relation.get(id1);
return similarity(o1, o2);
}
@Override
public double similarity(O o1, O o2) {
return this.similarityFunction.similarity(o1, o2);
}
@Override
public PrimitiveSimilarityFunction super O> getSimilarityFunction() {
return similarityFunction;
}
}