/**
* 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.transformation.aggregation;
import com.rapidminer.example.Attribute;
import com.rapidminer.example.table.AttributeFactory;
import com.rapidminer.tools.Ontology;
/**
* This class implements an abstract superclass for all Nominal aggregation functions, the new
* attribute will have an empty mapping. All subclasses must take care to modify the mapping
* accordingly, if adding new nominal values.
*
* @author Sebastian Land
*/
public abstract class NominalAggregationFunction extends AggregationFunction {
private Attribute targetAttribute;
public NominalAggregationFunction(Attribute sourceAttribute, boolean ignoreMissings, boolean countOnlyDisctinct,
String functionName, String separatorOpen, String separatorClose) {
super(sourceAttribute, ignoreMissings, countOnlyDisctinct);
if (sourceAttribute.isNominal()) {
this.targetAttribute = AttributeFactory.createAttribute(functionName + separatorOpen
+ getSourceAttribute().getName() + separatorClose, Ontology.POLYNOMINAL);
}
}
@Override
public Attribute getTargetAttribute() {
return targetAttribute;
}
@Override
public final boolean isCompatible() {
return getSourceAttribute().isNominal();
}
}