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Jenetics - Java Genetic Algorithm Library
/*
* Java Genetic Algorithm Library (jenetics-4.0.0).
* Copyright (c) 2007-2017 Franz Wilhelmstötter
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Author:
* Franz Wilhelmstötter ([email protected])
*/
package io.jenetics;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import io.jenetics.internal.util.Equality;
import io.jenetics.internal.util.Hash;
import io.jenetics.internal.util.reflect;
import io.jenetics.util.DoubleRange;
import io.jenetics.util.ISeq;
import io.jenetics.util.IntRange;
import io.jenetics.util.MSeq;
/**
* Numeric chromosome implementation which holds 64 bit floating point numbers.
*
* @see DoubleGene
*
* @author Franz Wilhelmstötter
* @since 1.6
* @version 4.0
*/
public class DoubleChromosome
extends AbstractBoundedChromosome
implements
NumericChromosome,
Serializable
{
private static final long serialVersionUID = 2L;
/**
* Create a new chromosome from the given {@code genes} and the allowed
* length range of the chromosome.
*
* @since 4.0
*
* @param genes the genes that form the chromosome.
* @param lengthRange the allowed length range of the chromosome
* @throws NullPointerException if one of the arguments is {@code null}.
* @throws IllegalArgumentException if the length of the gene sequence is
* empty, doesn't match with the allowed length range, the minimum
* or maximum of the range is smaller or equal zero or the given
* range size is zero.
*/
protected DoubleChromosome(
final ISeq genes,
final IntRange lengthRange
) {
super(genes, lengthRange);
}
/**
* Create a new random chromosome.
*
* @since 4.0
*
* @param min the min value of the {@link DoubleGene}s (inclusively).
* @param max the max value of the {@link DoubleGene}s (exclusively).
* @param lengthRange the allowed length range of the chromosome.
* @throws NullPointerException if one of the arguments is {@code null}.
* @throws IllegalArgumentException if the length is smaller than one
*/
public DoubleChromosome(
final Double min,
final Double max,
final IntRange lengthRange
) {
this(DoubleGene.seq(min, max, lengthRange), lengthRange);
_valid = true;
}
/**
* Create a new random {@code DoubleChromosome}.
*
* @param min the min value of the {@link DoubleGene}s (inclusively).
* @param max the max value of the {@link DoubleGene}s (exclusively).
* @param length the length of the chromosome.
* @throws NullPointerException if one of the arguments is {@code null}.
* @throws IllegalArgumentException if the length is smaller than one
*/
public DoubleChromosome(final Double min,final Double max,final int length) {
this(min, max, IntRange.of(length));
}
/**
* Create a new random {@code DoubleChromosome} of length one.
*
* @param min the minimal value of this chromosome (inclusively).
* @param max the maximal value of this chromosome (exclusively).
* @throws NullPointerException if one of the arguments is {@code null}.
*/
public DoubleChromosome(final Double min, final Double max) {
this(min, max, 1);
}
/**
* Returns an double array containing all of the elements in this chromosome
* in proper sequence. If the chromosome fits in the specified array, it is
* returned therein. Otherwise, a new array is allocated with the length of
* this chromosome.
*
* @since 3.0
*
* @param array the array into which the elements of this chromosomes are to
* be stored, if it is big enough; otherwise, a new array is
* allocated for this purpose.
* @return an array containing the elements of this chromosome
* @throws NullPointerException if the given {@code array} is {@code null}
*/
public double[] toArray(final double[] array) {
final double[] a = array.length >= length() ? array : new double[length()];
for (int i = length(); --i >= 0;) {
a[i] = doubleValue(i);
}
return a;
}
/**
* Returns an double array containing all of the elements in this chromosome
* in proper sequence.
*
* @since 3.0
*
* @return an array containing the elements of this chromosome
*/
public double[] toArray() {
return toArray(new double[length()]);
}
/**
* Create a new {@code DoubleChromosome} with the given genes.
*
* @param genes the genes of the chromosome.
* @return a new chromosome with the given genes.
* @throws IllegalArgumentException if the length of the genes array is
* empty.
*/
public static DoubleChromosome of(final DoubleGene... genes) {
return new DoubleChromosome(ISeq.of(genes), IntRange.of(genes.length));
}
/**
* Create a new random chromosome.
*
* @since 4.0
*
* @param min the min value of the {@link DoubleGene}s (inclusively).
* @param max the max value of the {@link DoubleGene}s (exclusively).
* @param lengthRange the allowed length range of the chromosome.
* @return a new {@code DoubleChromosome} with the given parameter
* @throws IllegalArgumentException if the length of the gene sequence is
* empty, doesn't match with the allowed length range, the minimum
* or maximum of the range is smaller or equal zero or the given
* range size is zero.
* @throws NullPointerException if the given {@code lengthRange} is
* {@code null}
*/
public static DoubleChromosome of(
final double min,
final double max,
final IntRange lengthRange
) {
return new DoubleChromosome(min, max, lengthRange);
}
/**
* Create a new random {@code DoubleChromosome}.
*
* @param min the min value of the {@link DoubleGene}s (inclusively).
* @param max the max value of the {@link DoubleGene}s (exclusively).
* @param length the length of the chromosome.
* @return a new {@code DoubleChromosome} with the given parameter
* @throws IllegalArgumentException if the {@code length} is smaller than
* one.
*/
public static DoubleChromosome of(
final double min,
final double max,
final int length
) {
return new DoubleChromosome(min, max, length);
}
/**
* Create a new random chromosome.
*
* @since 4.0
*
* @param range the integer range of the chromosome.
* @param lengthRange the allowed length range of the chromosome.
* @return a new {@code DoubleChromosome} with the given parameter
* @throws IllegalArgumentException if the length of the gene sequence is
* empty, doesn't match with the allowed length range, the minimum
* or maximum of the range is smaller or equal zero or the given
* range size is zero.
* @throws NullPointerException if the given {@code lengthRange} is
* {@code null}
*/
public static DoubleChromosome of(
final DoubleRange range,
final IntRange lengthRange
) {
return new DoubleChromosome(range.getMin(), range.getMax(), lengthRange);
}
/**
* Create a new random {@code DoubleChromosome}.
*
* @since 3.2
*
* @param range the integer range of the chromosome.
* @param length the length of the chromosome.
* @return a new random {@code DoubleChromosome}
* @throws NullPointerException if the given {@code range} is {@code null}
* @throws IllegalArgumentException if the {@code length} is smaller than
* one.
*/
public static DoubleChromosome of(final DoubleRange range, final int length) {
return new DoubleChromosome(range.getMin(), range.getMax(), length);
}
/**
* Create a new random {@code DoubleChromosome} of length one.
*
* @param min the minimal value of this chromosome (inclusively).
* @param max the maximal value of this chromosome (exclusively).
* @return a new {@code DoubleChromosome} with the given parameter
*/
public static DoubleChromosome of(final double min, final double max) {
return new DoubleChromosome(min, max);
}
/**
* Create a new random {@code DoubleChromosome} of length one.
*
* @since 3.2
*
* @param range the double range of the chromosome.
* @return a new random {@code DoubleChromosome} of length one
* @throws NullPointerException if the given {@code range} is {@code null}
*/
public static DoubleChromosome of(final DoubleRange range) {
return new DoubleChromosome(range.getMin(), range.getMax());
}
@Override
public DoubleChromosome newInstance(final ISeq genes) {
return new DoubleChromosome(genes, lengthRange());
}
@Override
public DoubleChromosome newInstance() {
return new DoubleChromosome(_min, _max, lengthRange());
}
@Override
public int hashCode() {
return Hash.of(getClass()).and(super.hashCode()).value();
}
@Override
public boolean equals(final Object obj) {
return Equality.of(this, obj).test(super::equals);
}
/* *************************************************************************
* Java object serialization
* ************************************************************************/
private void writeObject(final ObjectOutputStream out)
throws IOException
{
out.defaultWriteObject();
out.writeInt(length());
out.writeObject(lengthRange());
out.writeDouble(_min);
out.writeDouble(_max);
for (DoubleGene gene : _genes) {
out.writeDouble(gene.getAllele());
}
}
private void readObject(final ObjectInputStream in)
throws IOException, ClassNotFoundException
{
in.defaultReadObject();
final MSeq genes = MSeq.ofLength(in.readInt());
reflect.setField(this, "_lengthRange", in.readObject());
reflect.setField(this, "_min", in.readDouble());
reflect.setField(this, "_max", in.readDouble());
for (int i = 0; i < genes.length(); ++i) {
genes.set(i, new DoubleGene(in.readDouble(), _min, _max));
}
reflect.setField(this, "_genes", genes.toISeq());
}
}
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