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package de.lmu.ifi.dbs.elki.algorithm;
/*
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.type.TypeInformation;
import de.lmu.ifi.dbs.elki.data.type.TypeUtil;
import de.lmu.ifi.dbs.elki.database.Database;
import de.lmu.ifi.dbs.elki.logging.Logging;
import de.lmu.ifi.dbs.elki.result.Result;
import de.lmu.ifi.dbs.elki.utilities.documentation.Description;
import de.lmu.ifi.dbs.elki.utilities.documentation.Title;
/**
* Null Algorithm, which does nothing. Can be used to e.g. just visualize a data
* set.
*
* @author Erich Schubert
*/
@Title("Null Algorithm")
@Description("Algorithm which does nothing, just return a null object.")
public class NullAlgorithm extends AbstractAlgorithm<Result> {
/**
* The logger for this class.
*/
private static final Logging logger = Logging.getLogger(NullAlgorithm.class);
/**
* Constructor.
*/
public NullAlgorithm() {
super();
}
@Override
public Result run(@SuppressWarnings("unused") Database database) throws IllegalStateException {
return null;
}
@Override
protected Logging getLogger() {
return logger;
}
@Override
public TypeInformation[] getInputTypeRestriction() {
return TypeUtil.array();
}
}
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