/**
* 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.weighting;
import com.rapidminer.example.Attributes;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.operator.ports.metadata.AttributeMetaData;
import com.rapidminer.operator.ports.metadata.ExampleSetMetaData;
import com.rapidminer.operator.ports.metadata.MetaData;
import com.rapidminer.operator.ports.metadata.SetRelation;
import com.rapidminer.operator.preprocessing.AbstractDataProcessing;
import com.rapidminer.tools.Ontology;
import com.rapidminer.tools.math.container.Range;
/**
* Abstract superclass of operators adding a weight attribute.
*
* @author Simon Fischer
*
*/
public abstract class AbstractExampleWeighting extends AbstractDataProcessing {
public AbstractExampleWeighting(OperatorDescription description) {
super(description);
}
@Override
protected MetaData modifyMetaData(ExampleSetMetaData metaData) {
AttributeMetaData weightAttribute = new AttributeMetaData(Attributes.WEIGHT_NAME, Ontology.REAL,
Attributes.WEIGHT_NAME);
weightAttribute.setValueRange(getWeightAttributeRange(), getWeightAttributeValueRelation());
metaData.addAttribute(weightAttribute);
return metaData;
}
protected Range getWeightAttributeRange() {
return new Range(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY);
}
protected SetRelation getWeightAttributeValueRelation() {
return SetRelation.UNKNOWN;
}
}