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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) 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 java.util.ArrayList;
import de.lmu.ifi.dbs.elki.datasource.bundle.MultipleObjectsBundle;
import de.lmu.ifi.dbs.elki.logging.Logging;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizer;
/**
* A filter to remove entries that have missing values.
*
* @author Erich Schubert
*/
public class FilterNoMissingValuesFilter implements ObjectFilter {
/**
* Class logger
*/
private static final Logging logger = Logging.getLogger(FilterNoMissingValuesFilter.class);
/**
* Constructor.
*/
public FilterNoMissingValuesFilter() {
super();
}
@Override
public MultipleObjectsBundle filter(final MultipleObjectsBundle objects) {
if(logger.isDebugging()) {
logger.debug("Filtering the data set");
}
MultipleObjectsBundle bundle = new MultipleObjectsBundle();
for(int j = 0; j < objects.metaLength(); j++) {
bundle.appendColumn(objects.meta(j), new ArrayList<Object>());
}
for(int i = 0; i < objects.dataLength(); i++) {
boolean good = true;
for(int j = 0; j < objects.metaLength(); j++) {
if(objects.data(i, j) == null) {
good = false;
break;
}
}
if(good) {
bundle.appendSimple(objects.getRow(i));
}
}
return bundle;
}
/**
* Parameterization class.
*
* @author Erich Schubert
*
* @apiviz.exclude
*/
public static class Parameterizer extends AbstractParameterizer {
@Override
protected Object makeInstance() {
return new FilterNoMissingValuesFilter();
}
}
}
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