java.lang.Object

org.apache.commons.rng.core.source32.AbstractWell

All Implemented Interfaces:: RandomIntSource, RestorableUniformRandomProvider, UniformRandomProvider

Direct Known Subclasses:: Well1024a, Well19937a, Well44497a, Well512a

public abstract class AbstractWell
extends IntProvider

This abstract class implements the WELL class of pseudo-random number generator from François Panneton, Pierre L'Ecuyer and Makoto Matsumoto.

This generator is described in a paper by François Panneton, Pierre L'Ecuyer and Makoto Matsumoto Improved Long-Period Generators Based on Linear Recurrences Modulo 2 ACM Transactions on Mathematical Software, 32, 1 (2006). The errata for the paper are in wellrng-errata.txt.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`protected static class`	`AbstractWell.IndexTable`	Inner class used to store the indirection index table which is fixed for a given type of WELL class of pseudo-random number generator.

Method Summary

Modifier and Type	Method	Description
`protected byte[]`	`getStateInternal()`	Creates a snapshot of the RNG state.
`protected void`	`setStateInternal(byte[] s)`	Resets the RNG to the given `state`.

nextBoolean, nextBytes, nextBytes, nextDouble, nextFloat, nextInt, nextLong

checkIndex, checkStateSize, composeStateInternal, fillState, fillState, nextInt, nextLong, restoreState, saveState, splitStateInternal, toString

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

next

Modifier and Type	Field	Description
`protected int`	`index`	Current index in the bytes pool.
`protected int[]`	`v`	Bytes pool.