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package de.lmu.ifi.dbs.elki.datasource.filter;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
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.datasource.bundle.BundleMeta;
import de.lmu.ifi.dbs.elki.datasource.bundle.MultipleObjectsBundle;
/**
* Dummy filter that doesn't do any filtering.
*
* Useful for command line parameterization when you have multiple identically
* named parameters, and want to set the second parameter only. Then you can
* just use this dummy filter as first parameter.
*
* @author Erich Schubert
*/
public class NoOpFilter extends AbstractStreamFilter {
/**
* Constructor.
*/
public NoOpFilter() {
super();
}
@Override
public MultipleObjectsBundle filter(MultipleObjectsBundle objects) {
return objects;
}
@Override
public BundleMeta getMeta() {
return source.getMeta();
}
@Override
public Object data(int rnum) {
return source.data(rnum);
}
@Override
public Event nextEvent() {
return source.nextEvent();
}
}
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