core

Class AbstractSingleProblem

java.lang.Object

core.AbstractComponent

core.AbstractProblem

core.AbstractSingleProblem

Direct Known Subclasses:

InvertedPendulum, XOR

public abstract class AbstractSingleProblem
extends AbstractProblem

Provides a general interface to formulate own problems that evaluates a single representations at a time. By evaluating a candidate a corresponding fitness value must be calculated and returned.

In order to provide a visualized evaluation the method replayWithVisualization(core.AbstractRepresentation) must be overwritten.

To support requirement changes based on different parameters override the following method:

-AbstractProblem.adjustRequirements(java.util.Hashtable, java.util.Hashtable)

Author:

Istvan Fehervari

Constructor Summary

Constructors

Constructor and Description
AbstractSingleProblem()

Method Summary

Methods

Modifier and Type	Method and Description
double	evaluateFitness(AbstractRepresentation candidate) Evaluates the given representation by calculating its corresponding fitness value.
abstract double	getMaximumFitness() Returns the achievable maximum fitness of this problem.
void	replayWithVisualization(AbstractRepresentation candidate) This function is called when the user request a visual replay from the problem.

Methods inherited from class core.AbstractProblem

adjustRequirements, getRandom, setRandom

Methods inherited from class core.AbstractComponent

getProperties, getPropertyValue, getTypeOfProperty, getXMLData, setProperties, setXMLData

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractSingleProblem

public AbstractSingleProblem()

Method Detail

replayWithVisualization

public void replayWithVisualization(AbstractRepresentation candidate)

This function is called when the user request a visual replay from the problem. A total re-evaluation is not needed, only to provide a visual mean for the user to grasp the performance of the indicated candidate solution.

It is recommended to use advanced threading for display like SwingWorker.

Parameters:

candidate - The candidate whose replay has been requested.

evaluateFitness

public final double evaluateFitness(AbstractRepresentation candidate)

Evaluates the given representation by calculating its corresponding fitness value. A higher fitness means better performance.

Parameters:

candidate - The candidate solution to be evaluated.

Returns:

the corresponding fitness value.

getMaximumFitness

public abstract double getMaximumFitness()

Returns the achievable maximum fitness of this problem. A representations with this fitness value cannot be improved any further.