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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) 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.data.spatial.SpatialComparable;
import de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.distance.distancefunction.SpatialPrimitiveDistanceFunction;
import de.lmu.ifi.dbs.elki.distance.distancevalue.Distance;
/**
* Distance query for spatial distance functions
* @author Erich Schubert
*
* @apiviz.uses SpatialPrimitiveDistanceFunction
*
* @param <V> Vector type to use
* @param <D> Distance result type
*/
public class SpatialPrimitiveDistanceQuery<V extends SpatialComparable, D extends Distance<D>> extends PrimitiveDistanceQuery<V, D> implements SpatialDistanceQuery<V, D> {
/**
* The distance function we use.
*/
final protected SpatialPrimitiveDistanceFunction<? super V, D> distanceFunction;
/**
* @param relation Representation to use
* @param distanceFunction Distance function to use
*/
public SpatialPrimitiveDistanceQuery(Relation<? extends V> relation, SpatialPrimitiveDistanceFunction<? super V, D> distanceFunction) {
super(relation, distanceFunction);
this.distanceFunction = distanceFunction;
}
@Override
public D minDist(SpatialComparable mbr, V v) {
return distanceFunction.minDist(mbr, v);
}
@Override
public D minDist(SpatialComparable mbr, DBID id) {
return distanceFunction.minDist(mbr, relation.get(id));
}
@Override
public SpatialPrimitiveDistanceFunction<? super V, D> getDistanceFunction() {
return distanceFunction;
}
}
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