de.kumpe.hadooptimizer
Class EsIndividual

java.lang.Object
  de.kumpe.hadooptimizer.EsIndividual

All Implemented Interfaces:

Serializable

public final class EsIndividual
extends Object
implements Serializable

A special type of an immutable individual for evolution strategies.

The actual individual is a vector of real numbers (double[]). It is combined with an increment (the standard deviation during the mutation of the vector), which is mutated by itself.

Note: a instance is considered immutable, so you should not modify the contained individual. See getIndividual() for additional hints.

Author:

Christian Kumpe

See Also:

Serialized Form

Constructor Summary

EsIndividual(double individual)
Creates a new EsIndividual with the given single individual, which is converted to one-dimensional vector, and an increment of 1.

EsIndividual(double[] individual)
Creates a new EsIndividual with the given individual and an increment of 1.

EsIndividual(double[] individual, double increment)
Creates a new EsIndividual with the given individual and increment.

EsIndividual(double individual, double increment)
Creates a new EsIndividual with the given single individual, which is converted to one-dimensional vector, and the given increment.

Method Summary

boolean	equals(Object obj)
double	getIncrement() Returns the current increment.
double[]	getIndividual() Return the contained actual individual.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

EsIndividual

public EsIndividual(double individual)

Creates a new EsIndividual with the given single individual, which is converted to one-dimensional vector, and an increment of 1.

EsIndividual

public EsIndividual(double[] individual)

Creates a new EsIndividual with the given individual and an increment of 1.

Throws:

NullPointerException - if individual is null

IllegalArgumentException - if individual is an empty array

EsIndividual

public EsIndividual(double individual,
                    double increment)

Creates a new EsIndividual with the given single individual, which is converted to one-dimensional vector, and the given increment.

EsIndividual

public EsIndividual(double[] individual,
                    double increment)

Creates a new EsIndividual with the given individual and increment.

Throws:

NullPointerException - if individual is null

IllegalArgumentException - if individual is an empty array

Method Detail

getIndividual

public double[] getIndividual()

Return the contained actual individual.

Note: An instance of EsIndividual is considered to be immutable, but for performance reasons the contained array is not copied. So don't modify the returned array.

Returns:

the contained actual individual; cannot be null

getIncrement

public double getIncrement()

Returns the current increment.

Returns:

the current increment

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object