/*
* Title: CloudSim Toolkit
* Descripimport java.util.Random;
mulation) Toolkit for Modeling and Simulation of Clouds
* Licence: GPL - http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2009-2012, The University of Melbourne, Australia
*/
package org.cloudbus.cloudsim.distributions;
import java.util.Random;
import org.apache.commons.math3.distribution.WeibullDistribution;
/**
* A pseudo random number generator following the
* <a href="https://en.wikipedia.org/wiki/Weibull_distribution">Weibull distribution</a>.
*
* @author Marcos Dias de Assuncao
* @since CloudSim Toolkit 1.0
*/
public class WeibullDistr implements ContinuousDistribution {
/** The internal Weibull pseudo random number generator. */
private final WeibullDistribution numGen;
/**
* Instantiates a new Weibull pseudo random number generator.
*
* @param seed the seed
* @param alpha the alpha
* @param beta the beta
*/
public WeibullDistr(Random seed, double alpha, double beta) {
this(alpha, beta);
numGen.reseedRandomGenerator(seed.nextLong());
}
/**
* Instantiates a new Weibull pseudo random number generator.
*
* @param alpha the alpha
* @param beta the beta
*/
public WeibullDistr(double alpha, double beta) {
numGen = new WeibullDistribution(alpha, beta);
}
@Override
public double sample() {
return numGen.sample();
}
}