/*
* Title: CloudSim Toolkit
* Description: CloudSim (Cloud Simulation) 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;
/**
* The Class LomaxDistribution.
*
* @author Marcos Dias de Assuncao
* @since CloudSim Toolkit 1.0
*/
public class LomaxDistribution extends ParetoDistr implements ContinuousDistribution {
/** The shift. */
private final double shift;
/**
* Instantiates a new lomax distribution.
*
* @param shape the shape
* @param location the location
* @param shift the shift
*/
public LomaxDistribution(double shape, double location, double shift) {
super(shape, location);
if (shift > location) {
throw new IllegalArgumentException("Shift must be smaller or equal than location");
}
this.shift = shift;
}
/**
* Instantiates a new lomax distribution.
*
* @param seed the seed
* @param shape the shape
* @param location the location
* @param shift the shift
*/
public LomaxDistribution(Random seed, double shape, double location, double shift) {
super(seed, shape, location);
if (shift > location) {
throw new IllegalArgumentException("Shift must be smaller or equal than location");
}
this.shift = shift;
}
/*
* (non-Javadoc)
* @see cloudsim.distributions.ParetoDistr#sample()
*/
@Override
public double sample() {
return super.sample() - shift;
}
}