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package de.lmu.ifi.dbs.elki.index;
/*
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/>.
*/
import de.lmu.ifi.dbs.elki.database.query.distance.DistanceQuery;
import de.lmu.ifi.dbs.elki.database.query.range.RangeQuery;
/**
* Index with support for kNN queries.
*
* @author Erich Schubert
* @since 0.4.0
*
* @apiviz.landmark
* @apiviz.excludeSubtypes
* @apiviz.has RangeQuery oneway - - «provides»
*
* @param <O> Database Object type
*/
public interface RangeIndex<O> extends Index {
/**
* Get a range query object for the given distance query and k.
*
* This function MAY return null, when the given distance is not supported!
*
* @param distanceQuery Distance query
* @param hints Hints for the optimizer
* @return KNN Query object or {@code null}
*/
RangeQuery<O> getRangeQuery(DistanceQuery<O> distanceQuery, Object... hints);
}
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