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package de.lmu.ifi.dbs.elki.index.tree.metrical;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
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 java.util.List;
import de.lmu.ifi.dbs.elki.database.query.distance.DistanceQuery;
import de.lmu.ifi.dbs.elki.distance.distancefunction.DistanceFunction;
import de.lmu.ifi.dbs.elki.distance.distancevalue.Distance;
import de.lmu.ifi.dbs.elki.index.tree.Entry;
import de.lmu.ifi.dbs.elki.index.tree.IndexTree;
import de.lmu.ifi.dbs.elki.index.tree.Node;
import de.lmu.ifi.dbs.elki.persistent.PageFile;
/**
* Abstract super class for all metrical index classes.
*
* @author Elke Achtert
*
* @param <O> the type of objects stored in the index
* @param <D> the type of Distance used in the metrical index
* @param <N> the type of nodes used in the metrical index
* @param <E> the type of entries used in the metrical index
*/
public abstract class MetricalIndexTree<O, D extends Distance<D>, N extends Node<E>, E extends Entry> extends IndexTree<N, E> {
/**
* Constructor.
*
* @param pagefile Page file
*/
public MetricalIndexTree(PageFile<N> pagefile) {
super(pagefile);
}
/**
* Returns the distance function of this metrical index.
*
* @return the distance function of this metrical index
*/
public abstract DistanceFunction<? super O, D> getDistanceFunction();
/**
* Returns the distance function of this metrical index.
*
* @return the distance function of this metrical index
*/
public abstract DistanceQuery<O, D> getDistanceQuery();
/**
* Returns a list of entries pointing to the leaf nodes of this spatial index.
*
* @return a list of entries pointing to the leaf nodes of this spatial index
*/
public abstract List<E> getLeaves();
}
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