/*
* 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.ParetoDistribution;
/**
* A pseudo random number generator following the
* <a href="https://en.wikipedia.org/wiki/Pareto_distribution">Pareto</a> distribution.
*
* @author Marcos Dias de Assuncao
* @since CloudSim Toolkit 1.0
*/
public class ParetoDistr implements ContinuousDistribution {
/** The internal Pareto pseudo random number generator. */
private final ParetoDistribution numGen;
/**
* Instantiates a new Pareto pseudo random number generator.
*
* @param seed the seed
* @param shape the shape
* @param location the location
*/
public ParetoDistr(Random seed, double shape, double location) {
this(shape, location);
numGen.reseedRandomGenerator(seed.nextLong());
}
/**
* Instantiates a new Pareto pseudo random number generator.
*
* @param shape the shape
* @param location the location
*/
public ParetoDistr(double shape, double location) {
numGen = new ParetoDistribution(location, shape);
}
@Override
public double sample() {
return numGen.sample();
}
}