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package de.lmu.ifi.dbs.elki.database.query.range;
/*
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;
import de.lmu.ifi.dbs.elki.database.query.DistanceDBIDResult;
import de.lmu.ifi.dbs.elki.database.query.distance.PrimitiveDistanceQuery;
import de.lmu.ifi.dbs.elki.distance.distancevalue.Distance;
/**
* Default linear scan range query class.
*
* Subtle optimization: for primitive distances, retrieve the query object only
* once from the relation.
*
* @author Erich Schubert
*
* @apiviz.uses PrimitiveDistanceQuery
*
* @param <O> Database object type
* @param <D> Distance type
*/
public class LinearScanPrimitiveDistanceRangeQuery<O, D extends Distance<D>> extends LinearScanRangeQuery<O, D> {
/**
* Constructor.
*
* @param distanceQuery Distance function to use
*/
public LinearScanPrimitiveDistanceRangeQuery(PrimitiveDistanceQuery<O, D> distanceQuery) {
super(distanceQuery);
}
@Override
public DistanceDBIDResult<D> getRangeForDBID(DBIDRef id, D range) {
// Note: subtle optimization. Get "id" only once!
return getRangeForObject(relation.get(id), range);
}
}
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