examples.supergene
Class AbstractChangeFitnessFunction

java.lang.Object
  org.jgap.FitnessFunction
      examples.supergene.AbstractChangeFitnessFunction

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, ICloneable

Direct Known Subclasses:

SupergeneChangeFitnessFunction

public abstract class AbstractChangeFitnessFunction
extends FitnessFunction

Sample fitness function for the MakeChange example, including supergenes.

Since:

2.0

See Also:

Serialized Form

Field Summary

Fields inherited from class org.jgap.FitnessFunction

DELTA, NO_FITNESS_VALUE

Constructor Summary

AbstractChangeFitnessFunction(int a_targetAmount)

Method Summary

int	amountOfChange(IChromosome a_potentialSolution) Calculates the total amount of change (in cents) represented by the given potential solution and returns that amount.
double	evaluate(IChromosome a_subject) Determine the fitness of the given Chromosome instance.
int	getNumberOfCoinsAtGene(IChromosome a_potentialSolution, int a_code) Retrieves the number of coins represented by the given potential solution at the given gene position.
abstract Gene	getResponsibleGene(IChromosome a_chromosome, int a_code) Get the gene, responsible for the number of coins, corresponding this code.
int	getTotalNumberOfCoins(IChromosome a_potentialsolution) Returns the total number of coins represented by all of the genes in the given potential solution.

Methods inherited from class org.jgap.FitnessFunction

clone, getFitnessValue, getLastComputedFitnessValue

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractChangeFitnessFunction

public AbstractChangeFitnessFunction(int a_targetAmount)

Method Detail

evaluate

public double evaluate(IChromosome a_subject)

Determine the fitness of the given Chromosome instance. The higher the return value, the more fit the instance. This method should always return the same fitness value for two equivalent Chromosome instances.

Specified by:

evaluate in class FitnessFunction

Parameters:

a_subject - the Chromosome instance to evaluate

Returns:

positive integer reflecting the fitness rating of the given Chromosome

Since:

2.0

amountOfChange

public int amountOfChange(IChromosome a_potentialSolution)

Calculates the total amount of change (in cents) represented by the given potential solution and returns that amount.

Parameters:

a_potentialSolution - the potential solution to evaluate

Returns:

the total amount of change (in cents) represented by the given solution

getNumberOfCoinsAtGene

public int getNumberOfCoinsAtGene(IChromosome a_potentialSolution,
                                  int a_code)

Retrieves the number of coins represented by the given potential solution at the given gene position.

Parameters:

a_potentialSolution - the potential solution to evaluate

a_code - index of gene

Returns:

the number of coins represented by the potential solution at the given gene position

getTotalNumberOfCoins

public int getTotalNumberOfCoins(IChromosome a_potentialsolution)

Returns the total number of coins represented by all of the genes in the given potential solution.

Parameters:

a_potentialsolution - the potential solution to evaluate

Returns:

the total number of coins represented by the given Chromosome

getResponsibleGene

public abstract Gene getResponsibleGene(IChromosome a_chromosome,
                                        int a_code)

Get the gene, responsible for the number of coins, corresponding this code.

Parameters:

a_chromosome - Chromosome to evaluate

a_code - index of Gene

Returns:

responsible gene