evaluation.loadGenerator.randomVariable.Weibull.java Source code

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Here is the source code for evaluation.loadGenerator.randomVariable.Weibull.java

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/*******************************************************************************
 * gMix open source project - https://svs.informatik.uni-hamburg.de/gmix/
 * Copyright (C) 2014  SVS
 *
 * 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 evaluation.loadGenerator.randomVariable;

import org.apache.commons.math.MathException;

public class Weibull extends RandomVariable {

    private final String errorMessage = "invalid syntax for random variable " + this.getClass().getName()
            + "; distribution variable must be in the following form: "
            + "[RAND_VAR:Weibull(double shape, double scale)]";

    private final int numberOfParameters = 2;
    private final double shape;
    private final double scale;

    public Weibull(String[] parameters) {
        super(parameters);
        if (parameters.length != numberOfParameters)
            throw new RuntimeException(errorMessage);
        try {
            this.shape = Double.parseDouble(parameters[0]);
            this.scale = Double.parseDouble(parameters[1]);
            // test:
            this.randomDataImpl.nextWeibull(shape, scale);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(errorMessage);
        }
    }

    @Override
    public double drawDoubleSample() {
        try {
            return randomDataImpl.nextWeibull(shape, scale);
        } catch (MathException e) {
            e.printStackTrace();
            throw new RuntimeException(errorMessage);
        }
    }

}