/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* 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/.
*/
package com.rapidminer.operator.preprocessing.filter;
import com.rapidminer.example.ExampleSet;
import com.rapidminer.example.set.ReplaceMissingExampleSet;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.operator.OperatorException;
import com.rapidminer.operator.annotation.ResourceConsumptionEstimator;
import com.rapidminer.operator.ports.metadata.AttributeMetaData;
import com.rapidminer.operator.ports.metadata.ExampleSetMetaData;
import com.rapidminer.operator.ports.metadata.MDInteger;
import com.rapidminer.operator.ports.metadata.MetaData;
import com.rapidminer.operator.preprocessing.AbstractDataProcessing;
import com.rapidminer.tools.OperatorResourceConsumptionHandler;
/**
* This operator simply creates a new view on the input data without changing the actual data or
* creating a new data table. The new view will not contain any missing values for regular
* attributes but the mean value (or mode) of the non-missing values instead.
*
* @author Ingo Mierswa
*/
public class MissingValueReplenishmentView extends AbstractDataProcessing {
public MissingValueReplenishmentView(OperatorDescription description) {
super(description);
}
@Override
protected MetaData modifyMetaData(ExampleSetMetaData metaData) {
for (AttributeMetaData amd : metaData.getAllAttributes()) {
if (!amd.isSpecial()) {
amd.setNumberOfMissingValues(new MDInteger(0));
}
}
return metaData;
}
@Override
public ExampleSet apply(ExampleSet exampleSet) throws OperatorException {
ExampleSet result = ReplaceMissingExampleSet.create(exampleSet, null);
return result;
}
@Override
public boolean writesIntoExistingData() {
return false;
}
@Override
public ResourceConsumptionEstimator getResourceConsumptionEstimator() {
return OperatorResourceConsumptionHandler.getResourceConsumptionEstimator(getInputPort(),
MissingValueReplenishmentView.class, null);
}
}