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package de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants;
/*
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 de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.distance.distancevalue.Distance;
import de.lmu.ifi.dbs.elki.index.tree.Entry;
/**
* Defines the requirements for an entry in an M-Tree node.
*
* @author Elke Achtert
* @param <D> the type of Distance used in the M-Tree
*/
public interface MTreeEntry<D extends Distance<D>> extends Entry {
/**
* Returns the id of the underlying database object of this entry, if this
* entry is a leaf entry, the id of the routing object, otherwise.
*
* @return the id of the underlying database object of this entry, if this
* entry is a leaf entry, the id of the routing object, otherwise
*/
DBID getRoutingObjectID();
/**
* Sets the id of the underlying database object of this entry, if this entry
* is a leaf entry, the id of the routing object, otherwise.
*
* @param objectID the id to be set
*/
void setRoutingObjectID(DBID objectID);
/**
* Returns the distance from the routing object of this entry to the routing
* object of its parent.
*
* @return the distance from the object to its parent object
*/
D getParentDistance();
/**
* Sets the distance from the routing object to routing object of its parent.
*
* @param parentDistance the distance to be set
*/
void setParentDistance(D parentDistance);
/**
* Returns the covering radius if this entry is a directory entry, null
* otherwise.
*
* @return the covering radius of this entry
*/
D getCoveringRadius();
/**
* Sets the covering radius of this entry if this entry is a directory entry,
* throws an UnsupportedOperationException otherwise.
*
* @param coveringRadius the covering radius to be set
*/
void setCoveringRadius(D coveringRadius);
}
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