examples.audit
Class CoinsExampleFitnessFunction

java.lang.Object
  org.jgap.FitnessFunction
      examples.audit.CoinsExampleFitnessFunction

All Implemented Interfaces:

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

public class CoinsExampleFitnessFunction
extends FitnessFunction

Sample fitness function for the coins example.

Since:

2.2

See Also:

Serialized Form

Field Summary

static int

MAX_BOUND

Fields inherited from class org.jgap.FitnessFunction

DELTA, NO_FITNESS_VALUE

Constructor Summary

CoinsExampleFitnessFunction(int a_targetAmount)

Method Summary

static int	amountOfChange(IChromosome a_potentialSolution) Calculates the total amount of change (in cents) represented by the given potential solution and returns that amount.
protected double	computeCoinNumberBonus(int a_coins)
double	evaluate(IChromosome a_subject) Determine the fitness of the given Chromosome instance.
static int	getNumberOfCoinsAtGene(IChromosome a_potentialSolution, int a_position) Retrieves the number of coins represented by the given potential solution at the given gene position.
static 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

Field Detail

MAX_BOUND

public static final int MAX_BOUND

See Also:

Constant Field Values

Constructor Detail

CoinsExampleFitnessFunction

public CoinsExampleFitnessFunction(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:

a positive integer reflecting the fitness rating of the given Chromosome

Since:

2.2

computeCoinNumberBonus

protected double computeCoinNumberBonus(int a_coins)

amountOfChange

public static 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 pontential solution to evaluate

Returns:

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

Since:

2.2

getNumberOfCoinsAtGene

public static int getNumberOfCoinsAtGene(IChromosome a_potentialSolution,
                                         int a_position)

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_position - the gene position to evaluate

Returns:

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

Since:

2.2

getTotalNumberOfCoins

public static 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.

Since:

2.2