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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) 2014
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.ids.DoubleDBIDList;
import de.lmu.ifi.dbs.elki.database.query.distance.DistanceQuery;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
/**
* Abstract base class for range queries that use a distance query in their
* instance
*
* @author Erich Schubert
*
* @param <O> Database object type
*/
public abstract class AbstractDistanceRangeQuery<O> implements RangeQuery<O> {
/**
* The data to use for this query
*/
final protected Relation<? extends O> relation;
/**
* Hold the distance function to be used.
*/
final protected DistanceQuery<O> distanceQuery;
/**
* Constructor.
*
* @param distanceQuery Distance query
*/
public AbstractDistanceRangeQuery(DistanceQuery<O> distanceQuery) {
super();
this.relation = distanceQuery.getRelation();
this.distanceQuery = distanceQuery;
}
@Override
public DoubleDBIDList getRangeForDBID(DBIDRef id, double range) {
return getRangeForObject(relation.get(id), range);
}
@Override
abstract public DoubleDBIDList getRangeForObject(O obj, double range);
}
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