org.uncommons.watchmaker.framework.termination
Class TargetFitness

java.lang.Object
  org.uncommons.watchmaker.framework.termination.TargetFitness

All Implemented Interfaces:

TerminationCondition

public class TargetFitness
extends Object
implements TerminationCondition

Terminates evolution once at least one candidate in the population has equalled or bettered a pre-determined fitness score.

Author:

Daniel Dyer

Constructor Summary

TargetFitness(double targetFitness, boolean natural)

Method Summary

boolean

shouldTerminate(PopulationData<?> populationData) The condition is queried via this method to determine whether or not evolution should finish at the current point.

Methods inherited from class java.lang.Object

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

Constructor Detail

TargetFitness

public TargetFitness(double targetFitness,
                     boolean natural)

Parameters:

targetFitness - The fitness score that must be achieved by at least one individual in the population in order for this condition to be satisfied.

natural - Whether fitness scores are natural or non-natural. If fitness is natural, the condition will be satisfied if any individual has a fitness that is greater than or equal to the target fitness. If fitness is non-natural, the condition will be satisified in any individual has a fitness that is less than or equal to the target fitness.

See Also:

FitnessEvaluator

Method Detail

shouldTerminate

public boolean shouldTerminate(PopulationData<?> populationData)

The condition is queried via this method to determine whether or not evolution should finish at the current point.

Specified by:

shouldTerminate in interface TerminationCondition

Parameters:

populationData - Information about the current state of evolution. This may be used to determine whether evolution should continue or not.

Returns:

true if evolution should be terminated, false otherwise.