net.axyana.qizxopen.util
Class RandomGene

java.lang.Object
  net.axyana.qizxopen.util.RandomGene

public class RandomGene

extends java.lang.Object

Utilities for random generation of data. Used as XQuery Java extension functions.

Nested Class Summary

static class	RandomGene.IdGenerator
static class	RandomGene.RandomSelector

Constructor Summary

RandomGene()

Method Summary

static RandomGene.IdGenerator	generator() Simple id generator.
static int	idGenerate(RandomGene.IdGenerator generator)
static int	random(long range) Returns a number between 1 and N, with decaying probability
static java.lang.Object	select(RandomGene.RandomSelector selector)
static RandomGene.RandomSelector	selector(java.lang.Object[] data) random selector of an object in a list.
static int	xrandom(double decay) Returns a number between 1 and N, with decaying probability
static java.lang.Object	xselect(RandomGene.RandomSelector selector, double decay)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RandomGene

public RandomGene()

Method Detail

selector

public static RandomGene.RandomSelector selector(java.lang.Object[] data)

random selector of an object in a list.

select

public static java.lang.Object select(RandomGene.RandomSelector selector)

xselect

public static java.lang.Object xselect(RandomGene.RandomSelector selector,
                                       double decay)

generator

public static RandomGene.IdGenerator generator()

Simple id generator.

idGenerate

public static int idGenerate(RandomGene.IdGenerator generator)

random

public static int random(long range)

Returns a number between 1 and N, with decaying probability

xrandom

public static int xrandom(double decay)

Returns a number between 1 and N, with decaying probability