de.lmu.ifi.dbs.elki.utilities.random

Class RandomFactory

java.lang.Object

de.lmu.ifi.dbs.elki.utilities.random.RandomFactory

public class RandomFactory
extends java.lang.Object

RandomFactory is responsible for creating Random generator objects. It does not provide individual random numbers, but will create a random generator; either using a fixed seed or random seeded (default). The seed can be globally predefined using -Delki.seed=123. These classes are not optimized for non-predictability, but for speed, as scientific experiments are not likely to be adversarial.

Since:

0.5.5

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
static RandomFactory	DEFAULT Global default factory
protected long	seed Seed.

Constructor Summary

Constructors

Constructor and Description
RandomFactory(long seed) Constructor.

Method Summary

Modifier and Type	Method and Description
static RandomFactory	get(java.lang.Long seed) Factory method: Get a random factory for the given seed.
private static long	getGlobalSeed() Initialize the default random.
java.util.Random	getRandom() Get a random generator.
java.util.Random	getSingleThreadedRandom() Get a non-threadsafe random generator.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT

public static RandomFactory DEFAULT

Global default factory

seed

protected long seed

Seed.

Constructor Detail

RandomFactory

public RandomFactory(long seed)

Constructor.

Parameters:

seed - Random seed

Method Detail

getGlobalSeed

private static long getGlobalSeed()

Initialize the default random.

Returns:

seed for the random generator factory.

get

public static RandomFactory get(java.lang.Long seed)

Factory method: Get a random factory for the given seed.

Parameters:

seed - Seed

Returns:

Instance

getRandom

public java.util.Random getRandom()

Get a random generator.

Returns:

Random generator

getSingleThreadedRandom

public java.util.Random getSingleThreadedRandom()

Get a non-threadsafe random generator.

Returns:

Random generator

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object