/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.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.sampling;
import java.util.Random;
import com.rapidminer.example.Attributes;
import com.rapidminer.example.ExampleSet;
import com.rapidminer.example.set.MappedExampleSet;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.operator.OperatorException;
import com.rapidminer.operator.UserError;
/**
* This operator constructs a bootstrapped sample from the given example set which must provide
* a weight attribute. If no weight attribute was provided this operator will stop the process
* with an error message. See the operator {@link Bootstrapping} for more information.
*
* @author Ingo Mierswa
* @version $Id: WeightedBootstrapping.java,v 1.4 2008/05/09 19:23:16 ingomierswa Exp $
*/
public class WeightedBootstrapping extends AbstractBootstrapping {
public WeightedBootstrapping(OperatorDescription description) {
super(description);
}
public int[] createMapping(ExampleSet exampleSet, int size, Random random) throws OperatorException {
if (exampleSet.getAttributes().getWeight() == null)
throw new UserError(this, 113, Attributes.WEIGHT_NAME);
return MappedExampleSet.createWeightedBootstrappingMapping(exampleSet, size, random);
}
}