Codecs { public static InvertibleCodec<int[], EnumGene<Integer>> ofPermutation(final int length) { Requires.positive(length); final PermutationChromosome<Integer> chromosome = PermutationChromosome.ofInteger(length); final Map<Integer, EnumGene<Integer>> genes = chromosome.stream() .collect(Collectors.toMap(EnumGene::allele, identity())); return InvertibleCodec.of( Genotype.of(chromosome), gt -> gt.chromosome().stream() .mapToInt(EnumGene::allele) .toArray(), val -> Genotype.of( new PermutationChromosome<>( IntStream.of(val) .mapToObj(genes::get) .collect(ISeq.toISeq()) ) ) ); } private  Codecs(); static InvertibleCodec<Integer, IntegerGene> ofScalar(final IntRange domain); static InvertibleCodec<Long, LongGene> ofScalar(final LongRange domain); static InvertibleCodec<Double, DoubleGene> ofScalar(final DoubleRange domain); static Codec<A, AnyGene<A>> ofScalar(
		final Supplier<? extends A> supplier,
		final Predicate<? super A> validator
	); static Codec<A, AnyGene<A>> ofScalar(
		final Supplier<? extends A> supplier
	); static InvertibleCodec<int[], IntegerGene> ofVector(
		final IntRange domain,
		final int length
	); static InvertibleCodec<long[], LongGene> ofVector(
		final LongRange domain,
		final int length
	); static InvertibleCodec<double[], DoubleGene> ofVector(
		final DoubleRange domain,
		final int length
	); static InvertibleCodec<int[], IntegerGene> ofVector(final IntRange... domains); static InvertibleCodec<long[], LongGene> ofVector(final LongRange... domains); static InvertibleCodec<double[], DoubleGene> ofVector(final DoubleRange... domains); static Codec<ISeq<A>, AnyGene<A>> ofVector(
		final Supplier<? extends A> supplier,
		final Predicate<? super A> alleleValidator,
		final Predicate<? super ISeq<A>> alleleSeqValidator,
		final int length
	); static Codec<ISeq<A>, AnyGene<A>> ofVector(
		final Supplier<? extends A> supplier,
		final Predicate<? super A> validator,
		final int length
	); static Codec<ISeq<A>, AnyGene<A>> ofVector(
		final Supplier<? extends A> supplier,
		final int length
	); static InvertibleCodec<int[], EnumGene<Integer>> ofPermutation(final int length); static InvertibleCodec<ISeq<T>, EnumGene<T>> ofPermutation(final ISeq<? extends T> alleles); static InvertibleCodec<int[][], IntegerGene> ofMatrix(
		final IntRange domain,
		final int rows,
		final int cols
	); static InvertibleCodec<long[][], LongGene> ofMatrix(
		final LongRange domain,
		final int rows,
		final int cols
	); static InvertibleCodec<double[][], DoubleGene> ofMatrix(
		final DoubleRange domain,
		final int rows,
		final int cols
	); static InvertibleCodec<M, EnumGene<Integer>> ofMapping(
		final ISeq<? extends A> source,
		final ISeq<? extends B> target,
		final Supplier<M> mapSupplier
	); static InvertibleCodec<Map<A, B>, EnumGene<Integer>> ofMapping(final ISeq<? extends A> source, final ISeq<? extends B> target); static InvertibleCodec<ISeq<T>, BitGene> ofSubSet(final ISeq<? extends T> basicSet); static InvertibleCodec<ISeq<T>, EnumGene<T>> ofSubSet(
		final ISeq<? extends T> basicSet,
		final int size
	);  }
@Test public void ofPermutation() { final Codec<ISeq<String>, EnumGene<String>> codec = Codecs .ofPermutation(ISeq.of("foo", "bar", "zoo")); final Genotype<EnumGene<String>> gt = codec.encoding().newInstance(); assertEquals(gt.length(), 1); final Function<Genotype<EnumGene<String>>, ISeq<String>> f = codec.decoder(); final ISeq<String> value = f.apply(gt); assertEquals(value.length(), gt.chromosome().length()); for (int i = 0; i < value.length(); ++i) { assertEquals(value.get(i), gt.get(0).get(i).toString()); } }