org.jgap.impl.fitness

Class TruthTableFitnessFunction

java.lang.Object

org.jgap.FitnessFunction

org.jgap.impl.fitness.TruthTableFitnessFunction

All Implemented Interfaces:

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

public abstract class TruthTableFitnessFunction
extends FitnessFunction

Fitness Function relying on a truth table. To use this class, just implement a subclass of it, register the current truth table and implement the evaluate method in a way that you can call calcFitness with the required (parameter (given values: encoded with the chromosome). If the truth table is dynamic just register it in evaluate, otherwise do it after construction of this fitness function.

Since:

2.4

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_FITNESS
static int	WORST

Fields inherited from class org.jgap.FitnessFunction

DELTA, NO_FITNESS_VALUE

Constructor Summary

Constructors

Constructor and Description
TruthTableFitnessFunction() Only use for dynamic instantiation as configuration retrieved from static setting.
TruthTableFitnessFunction(Configuration a_conf) Constructor without registering a truth table.
TruthTableFitnessFunction(Configuration a_conf, java.util.Map a_truthTable) Constructor for registering a truth table.

Method Summary

Modifier and Type	Method and Description
double	calcFitness(java.util.Map a_actualInputOutput) Fitness value calculation for a given table of input/output tupels and a truth-table (also given as list of input/output tupels)
Configuration	getConfiguration()
java.util.Map	getTruthTable()
void	setTruthTable(java.util.Map a_truthTable)

Methods inherited from class org.jgap.FitnessFunction

clone, getFitnessValue, getLastComputedFitnessValue

Methods inherited from class java.lang.Object

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

Field Detail

MAX_FITNESS

public static final int MAX_FITNESS

See Also:

Constant Field Values

WORST

public static final int WORST

See Also:

Constant Field Values

Constructor Detail

TruthTableFitnessFunction

public TruthTableFitnessFunction()

Only use for dynamic instantiation as configuration retrieved from static setting.

Since:

2.4

TruthTableFitnessFunction

public TruthTableFitnessFunction(Configuration a_conf)

Constructor without registering a truth table. Use this constructor if the truth table is not fix over generations and needs to be set in method evaluate.

Parameters:

a_conf - the configuration to use

Since:

3.01

TruthTableFitnessFunction

public TruthTableFitnessFunction(Configuration a_conf,
                                 java.util.Map a_truthTable)

Constructor for registering a truth table. Use this constructor if the truth table is fix over generations.

Parameters:

a_conf - the configuration to use

a_truthTable - table of input/output pairs for feeding the formula and determining the fitness value thru delta computation

Since:

3.1

Method Detail

setTruthTable

public void setTruthTable(java.util.Map a_truthTable)

getTruthTable

public java.util.Map getTruthTable()

calcFitness

public double calcFitness(java.util.Map a_actualInputOutput)

Fitness value calculation for a given table of input/output tupels and a truth-table (also given as list of input/output tupels)

Parameters:

a_actualInputOutput - table of actual input/output pairs

Returns:

delta between current values and given truth table

Since:

2.4

getConfiguration

public Configuration getConfiguration()

Returns:

the Configuration object set

Since:

3.1