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package de.lmu.ifi.dbs.elki.index.preprocessed;
/*
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.data.NumberVector;
import de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.index.Index;
import de.lmu.ifi.dbs.elki.index.IndexFactory;
import de.lmu.ifi.dbs.elki.math.linearalgebra.ProjectionResult;
/**
* Abstract index interface for local projections
*
* @author Erich Schubert
*
* @apiviz.has ProjectionResult
*
* @param <V> Vector type
* @param <P> Projection result type
*/
public interface LocalProjectionIndex<V extends NumberVector<?, ?>, P extends ProjectionResult> extends Index {
/**
* Get the precomputed local projection for a particular object ID.
*
* @param objid Object ID
* @return local projection
*/
public P getLocalProjection(DBID objid);
/**
* Factory
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.has LocalProjectionIndex oneway - - «create»
*
* @param <V> Vector type
* @param <I> Index type
*/
public static interface Factory<V extends NumberVector<?, ?>, I extends LocalProjectionIndex<V, ?>> extends IndexFactory<V, I> {
/**
* Instantiate the index for a given database.
*
* @param relation Relation to use
*
* @return Index
*/
@Override
public I instantiate(Relation<V> relation);
}
}
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