/*
* This file is part of JGAP.
*
* JGAP offers a dual license model containing the LGPL as well as the MPL.
*
* For licensing information please see the file license.txt included with JGAP
* or have a look at the top of class org.jgap.Chromosome which representatively
* includes the JGAP license policy applicable for any file delivered with JGAP.
*/
package org.jgap;
import java.io.*;
import org.jgap.util.*;
/**
* Interface for chromosomes.
* Normally, you would start using BaseChromosome which implements this
* interface to build your own chromosome classes.
*
* @author Klaus Meffert
* @since 2.6
*/
public interface IChromosome
extends Comparable, ICloneable, Serializable, IUniqueKey {
/** String containing the CVS revision. Read out via reflection!*/
final static String CVS_REVISION = "$Revision: 1.17 $";
/**
* Constants for toString()
*/
public final static String S_FITNESS_VALUE = "Fitness value";
public final static String S_ALLELES = "Alleles";
public final static String S_APPLICATION_DATA = "Application data";
public final static String S_SIZE = "Size";
/**
* Returns the Gene at the given index (locus) within the Chromosome. The
* first gene is at index zero and the last gene is at the index equal to
* the size of this Chromosome - 1.
*
* @param a_desiredLocus index of the gene value to be returned
* @return Gene at the given index
*
* @author Neil Rotstan
* @author Klaus Meffert
* @since 2.6
*/
Gene getGene(int a_desiredLocus);
/**
* Retrieves the set of genes that make up this Chromosome. This method
* exists primarily for the benefit of GeneticOperators that require the
* ability to manipulate Chromosomes at a low level.
*
* @return an array of the Genes contained within this Chromosome
*
* @author Neil Rotstan
* @author Klaus Meffert
* @since 2.6
*/
Gene[] getGenes();
/**
* Sets the genes for the chromosome.
* @param a_genes the genes to set for the chromosome
*
* @throws InvalidConfigurationException in case constraint checker is
* provided
*
* @author Klaus Meffert
* @since 2.6
*/
void setGenes(Gene[] a_genes)
throws InvalidConfigurationException;
/**
* Returns the size of this Chromosome (the number of genes it contains).
* A Chromosome's size is constant and will not change, until setGenes(...)
* is used.
*
* @return number of genes contained within this Chromosome instance
*
* @author Klaus Meffert
* @author Neil Rotstan
* @since 2.6
*/
int size();
/**
* Sets the fitness value of this Chromosome. This method is for use
* by bulk fitness functions and should not be invokved from anything
* else (except test cases).
*
* @param a_newFitnessValue a positive integer representing the fitness
* of this Chromosome
*
* @author Neil Rotstan
* @since 2.6
*/
void setFitnessValue(double a_newFitnessValue);
/**
* Sets the fitness value of this Chromosome directly without any
* constraint checks, conversions or checks. Only use if you know what
* you do.
*
* @param a_newFitnessValue a positive integer representing the fitness
* of this Chromosome
*
* @author Klaus Meffert
* @since 2.6
*/
void setFitnessValueDirectly(double a_newFitnessValue);
/**
* Retrieves the fitness value of this Chromosome, as determined by the
* active fitness function. If a bulk fitness function is in use and
* has not yet assigned a fitness value to this Chromosome, then -1 is
* returned.
* Attention: should not be called from toString() as the fitness value would
* be computed if it was initial!
*
* @return a positive double value representing the fitness of this
* Chromosome, or -1 if a bulk fitness function is in use and has not yet
* assigned a fitness value to this Chromosome
*
* @author Neil Rotstan
* @author Klaus Meffert
* @since 2.6
*/
double getFitnessValue();
/**
* @return the lastly computed fitness value, or FitnessFunction.NO_FITNESS_VALUE
* in case no value has been computed yet.
*
* @author Klaus Meffert
* @since 2.6
*/
double getFitnessValueDirectly();
/**
* Sets whether this Chromosome has been selected by the natural selector
* to continue to the next generation or manually (e.g. via an add-method).
*
* @param a_isSelected true if this Chromosome has been selected, false
* otherwise
*
* @author Neil Rotstan
* @author Klaus Meffert
* @since 2.6
*/
void setIsSelectedForNextGeneration(boolean a_isSelected);
/**
* Retrieves whether this Chromosome has been selected by the natural
* selector to continue to the next generation.
*
* @return true if this Chromosome has been selected, false otherwise
*
* @author Neil Rotstan
* @author Klaus Meffert
* @since 2.6
*/
boolean isSelectedForNextGeneration();
/**
* Sets the constraint checker to be used for this gene whenever method
* setAllele(Object) is called.
*
* @param a_constraintChecker the constraint checker to be set
* @throws InvalidConfigurationException
*
* @author Klaus Meffert
* @since 2.6
*/
void setConstraintChecker(IGeneConstraintChecker a_constraintChecker)
throws InvalidConfigurationException;
/**
* This sets the application-specific data that is attached to this
* Chromosome. Attaching application-specific data may be useful for
* some applications when it comes time to evaluate this Chromosome
* in the fitness function.
*
* @param a_newData the new application-specific data to attach to this
* Chromosome. Should be an instance of IApplicationData
*
* @author Neil Rotstan
* @author Klaus Meffert
* @since 2.6
*/
void setApplicationData(Object a_newData);
/**
* Retrieves the application-specific data that is attached to this
* Chromosome. Attaching application-specific data may be useful for
* some applications when it comes time to evaluate this Chromosome
* in the fitness function. JGAP ignores this data functionally.
*
* @return the application-specific data previously attached to this
* Chromosome, or null if there is no data attached
*
* @author Neil Rotstan
* @author Klaus Meffert
* @since 2.6
*/
Object getApplicationData();
/**
* Invoked when this Chromosome is no longer needed and should perform
* any necessary cleanup. Note that this method will attempt to release
* this Chromosome instance to the active ChromosomePool, if any.
*
* @author Neil Rotstan
* @author Klaus Meffert
* @since 2.6
*/
void cleanup();
/**
* @return the configuration set
*
* @author Klaus Meffert
* @since 3.0
*/
Configuration getConfiguration();
/**
* Increases the number of evolutionary rounds of chromosome in which it has
* not been changed by one.
*
* @author Klaus Meffert
* @since 3.2
*/
void increaseAge();
/**
* Reset age of chromosome because it has been changed.
*
* @author Klaus Meffert
* @since 3.2
*/
void resetAge();
/**
* @param a_age set the age of the chromosome, see BestChromosomesSelector
* for a use-case
*
* @author Klaus Meffert
* @since 3.3.3
*/
void setAge(int a_age);
/**
* @return 0: Chromosome newly created in this generation. This means it
* does not need being crossed over with another newly created one
*
* @author Klaus Meffert
* @since 3.2
*/
int getAge();
/**
* Increase information of number of genetic operations performed on
* chromosome in current evolution round.
*
* @author Klaus Meffert
* @since 3.2
*/
void increaseOperatedOn();
/**
* Resets the information of how many genetic operators have been performed
* on the chromosome in the current round of evolution.
*
* @author Klaus Meffert
* @since 3.2
*
*/
void resetOperatedOn();
/**
* @return number of genetic operations performed on chromosome in current
* evolution round
*
* @author Klaus Meffert
* @since 3.2
*/
int operatedOn();
}
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