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package de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.query;
import de.lmu.ifi.dbs.elki.database.query.distance.DistanceQuery;
import de.lmu.ifi.dbs.elki.database.query.knn.KNNQuery;
import de.lmu.ifi.dbs.elki.database.query.range.RangeQuery;
import de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.AbstractMTree;
/*
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/>.
*/
/**
* Query utility classes for MTrees.
*
* @author Erich Schubert
* @since 0.5.5
*/
public final class MTreeQueryUtil {
/**
* Get an RTree knn query, using an optimized double implementation when
* possible.
*
* @param <O> Object type
* @param tree Tree to query
* @param distanceQuery distance query
* @param hints Optimizer hints
* @return Query object
*/
public static <O> KNNQuery<O> getKNNQuery(AbstractMTree<O, ?, ?, ?> tree, DistanceQuery<O> distanceQuery, Object... hints) {
return new MetricalIndexKNNQuery<>(tree, distanceQuery);
}
/**
* Get an RTree knn query, using an optimized double implementation when
* possible.
*
* @param <O> Object type
* @param tree Tree to query
* @param distanceQuery distance query
* @param hints Optimizer hints
* @return Query object
*/
public static <O> RangeQuery<O> getRangeQuery(AbstractMTree<O, ?, ?, ?> tree, DistanceQuery<O> distanceQuery, Object... hints) {
return new MetricalIndexRangeQuery<>(tree, distanceQuery);
}
}
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