org.jwarp.util.recycle
Class GaussianController

java.lang.Object
  |
  +--org.jwarp.util.recycle.GaussianController

All Implemented Interfaces:

IController

public class GaussianController

extends java.lang.Object

implements IController

This is an adaptive controller based on a statistical analysis of the level transitions. The optimal level is derived from the variance of the transitions using the following equation:

   adaptiveLevel = bias + factor * standardDeviation   

where the standard deviation signifies the variability of level around its average.

This class creates a convergence of the system Container-Controller to a point in which the average level tends to its standard deviation. This creates a negative feedback that stabilizes the system.

NOTE: This class is only experimental and it is meant to show only a more complex implementation of a Controller. The routines that calculate the statistical parameters this class uses to determine the level use heavy calculations and should be used only when a very precise adaptivity is required.

Author:

Anatole Tresch

Constructor Summary

GaussianController()

Method Summary

boolean	canAddObject(IRecyclable object) Evaluates the room for the object to recycle basing this decision to the optimum level estrapolated from the level history.
void	objectAdded() Writes on the memory of this controller incrementing the level.
void	objectRemoved() Writes on the memory of this controller decrementing the level.

Methods inherited from class java.lang.Object

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

Constructor Detail

GaussianController

public GaussianController()

Method Detail

objectAdded

public void objectAdded()

Writes on the memory of this controller incrementing the level.

Specified by:

objectAdded in interface IController

objectRemoved

public void objectRemoved()

Writes on the memory of this controller decrementing the level.

Specified by:

objectRemoved in interface IController

canAddObject

public boolean canAddObject(IRecyclable object)

Evaluates the room for the object to recycle basing this decision to the optimum level estrapolated from the level history.

Specified by:

canAddObject in interface IController