/*
* @(#)$Id: Settings.java 3619 2008-03-26 07:23:03Z yui $
*
* Copyright 2004 Hewlett-Packard Development Company, LP
* [See end of file]
*
* Contributors:
* HP Jena project - initial implementation
* Makoto YUI - applied some modifications
*/
package xbird.util.distribution;
import edu.cornell.lassp.houle.RngPack.RandomElement;
import edu.cornell.lassp.houle.RngPack.Ranecu;
/**
* This class defines the distribution, which is a super class for GaussDist, PoissonDist, UniformDist, ZipfianDist.
*
* @author LUPINGD
*/
public abstract class Distribution {
/** the generator for generating uniformly
* distributed random number within [0, 1]. */
protected RandomElement randomEle;
public Distribution() {
randomEle = new Ranecu();
}
public Distribution(int seed1, int seed2) {
randomEle = new Ranecu(seed1, seed2);
}
public void setRandomEle(RandomElement re) {
randomEle = re;
}
public abstract Number nextRandomValue();
public long nextRandomLong() {
return nextRandomValue().longValue();
}
public double nextRandomDouble() {
return nextRandomValue().doubleValue();
}
}
/*
* (c) Copyright 2004 Hewlett-Packard Development Company, LP
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/