org.jenetics.engine

Class limit

java.lang.Object

org.jenetics.engine.limit

public final class limit
extends Object

This class contains factory methods for creating predicates, which can be used for limiting the evolution stream.

Since:

3.0

Version:

3.0 — $Date: 2014-12-28 $

Author:

Franz Wilhelmstötter

See Also:

EvolutionStream.limit(Predicate)

Method Summary

Modifier and Type	Method and Description
static <C extends Comparable<? super C>> Predicate<EvolutionResult<?,C>>	bySteadyFitness(int generations) Return a predicate, which will truncate the evolution stream if no better phenotype could be found after the given number of generations.

Methods inherited from class java.lang.Object

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

Method Detail

bySteadyFitness

public static <C extends Comparable<? super C>> Predicate<EvolutionResult<?,C>> bySteadyFitness(int generations)

Return a predicate, which will truncate the evolution stream if no better phenotype could be found after the given number of generations.

final Phenotype<DoubleGene, Double> result = engine.stream() // Truncate the evolution stream after 5 "steady" generations. .limit(bySteadyFitness(5)) // The evolution will stop after maximal 100 generations. .limit(100) .collect(toBestPhenotype());

Type Parameters:

C - the fitness type

Parameters:

generations - the number of steady generations

Returns:

a predicate which truncate the evolution stream if no better phenotype could be found after a give number of generations

Throws:

IllegalArgumentException - if the generation is smaller than one.