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package de.lmu.ifi.dbs.elki.index.preprocessed.localpca;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2012
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.data.NumberVector;
import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.index.preprocessed.LocalProjectionIndex;
import de.lmu.ifi.dbs.elki.math.linearalgebra.pca.PCAFilteredResult;
/**
* Interface for an index providing local PCA results.
*
* @author Erich Schubert
*
* @param <NV> Vector type
*/
public interface FilteredLocalPCAIndex<NV extends NumberVector<?>> extends LocalProjectionIndex<NV, PCAFilteredResult> {
/**
* Get the precomputed local PCA for a particular object ID.
*
* @param objid Object ID
* @return Matrix
*/
@Override
public PCAFilteredResult getLocalProjection(DBIDRef objid);
/**
* Factory interface
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses FilteredLocalPCAIndex oneway - - «create»
*
* @param <NV> Vector type
* @param <I> Index type produced
*/
public static interface Factory<NV extends NumberVector<?>, I extends FilteredLocalPCAIndex<NV>> extends LocalProjectionIndex.Factory<NV, I> {
/**
* Instantiate the index for a given database.
*
* @param relation Relation to use
*
* @return Index
*/
@Override
public I instantiate(Relation<NV> relation);
}
}
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