es.udc.gii.common.eaf.stoptest.cma.CMATolXUpStopTest.java Source code

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Here is the source code for es.udc.gii.common.eaf.stoptest.cma.CMATolXUpStopTest.java

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/*
 * Copyright (C) 2012 Grupo Integrado de Ingeniera (<a href="www.gii.udc.es">www.gii.udc.es</a>)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package es.udc.gii.common.eaf.stoptest.cma;

import es.udc.gii.common.eaf.algorithm.CMAEvolutionaryAlgorithm;
import es.udc.gii.common.eaf.algorithm.EvolutionaryAlgorithm;
import es.udc.gii.common.eaf.stoptest.SimpleStopTest;
import es.udc.gii.common.eaf.util.ConfWarning;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.math.stat.StatUtils;

/**
 *
 * @author Grupo Integrado de Ingeniera (<a href="www.gii.udc.es">www.gii.udc.es</a>)
 */
public class CMATolXUpStopTest extends SimpleStopTest {

    private double tol_up_x_factor = 1.0e3;

    @Override
    public boolean isReach(EvolutionaryAlgorithm algorithm) {

        double sigma, maxstartsigma, maxsqrtdiagC;
        CMAEvolutionaryAlgorithm cma = (CMAEvolutionaryAlgorithm) algorithm;

        maxstartsigma = StatUtils.max(cma.getStartSigma());
        maxsqrtdiagC = Math.sqrt(StatUtils.max(cma.diag(cma.getC())));
        sigma = cma.getSigma();

        if (sigma * maxsqrtdiagC > this.tol_up_x_factor * maxstartsigma) {
            return true;
        }

        return false;

    }

    @Override
    public void configure(Configuration conf) {

        if (conf.containsKey("TolXUpFactor")) {
            this.tol_up_x_factor = conf.getDouble("TolXUpFactor");
        } else {
            ConfWarning w = new ConfWarning("TolXUpFactor", this.tol_up_x_factor);
            w.warn();
        }

    }
}