de.terministic.serein.core.genome.DoubleGenome.java Source code

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Here is the source code for de.terministic.serein.core.genome.DoubleGenome.java

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/**
 * Copyright (C) 2015 Tobias Uhlig (tobias.uhlig@unibw.de)
 *
 * 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.
 */
package de.terministic.serein.core.genome;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import org.apache.commons.math3.linear.ArrayRealVector;
import org.apache.commons.math3.linear.RealVector;

public final class DoubleGenome extends ValueGenome<Double> {
    private double[] geneArray;
    private RealVector geneVector;

    public final static double LOWER_BOUND = 0.0;
    public final static double UPPER_BOUND = 1.0;

    public DoubleGenome(List<Double> genes) {
        super(genes);
        if (!inBounds(genes)) {
            throw new OutOfBoundsException(LOWER_BOUND, UPPER_BOUND);
        }

    }

    @Override
    public String getGenomeId() {
        return this.getClass().getName();
    }

    @Override
    public DoubleGenome createInstance(List<Double> genes) {
        return new DoubleGenome(genes);
    }

    public DoubleGenome createRandomInstance(int size, Random random) {
        List<Double> genes = new ArrayList<>();
        for (int i = 0; i < size; i++) {
            genes.add(this.getRandomValue(random));
        }
        return createInstance(genes);
    }

    @Override
    public DoubleGenome createRandomInstance(Random random) {
        return createRandomInstance(this.size(), random);
    }

    @Override
    public Double getRandomValue(Random random) {
        return random.nextDouble();
    }

    public double[] getGeneArray() {
        if (geneArray == null) {
            geneArray = new double[this.size()];
            List<Double> genes = this.getGenes();
            for (int i = 0; i < this.size(); i++) {
                geneArray[i] = genes.get(i);
            }
        }
        return geneArray;
    }

    public RealVector getGeneVector() {
        if (geneVector == null) {
            geneVector = new ArrayRealVector(getGeneArray());
        }
        return geneVector;
    }

    static public DoubleGenome createRandomDoubleGenome(int size, Random random) {
        List<Double> genes = new ArrayList<>();
        for (int i = 0; i < size; i++) {
            genes.add(random.nextDouble());
        }
        return new DoubleGenome(genes);
    }

    public static boolean inBounds(List<Double> genes) {
        for (double d : genes) {
            if (LOWER_BOUND > d || d > UPPER_BOUND)
                return false;
        }
        return true;
    }

    public static void limitToBounds(List<Double> genes) {
        for (int i = 0; i < genes.size(); i++) {

            if (genes.get(i) < LOWER_BOUND) {
                genes.set(i, LOWER_BOUND);
            } else if (genes.get(i) > UPPER_BOUND) {
                genes.set(i, UPPER_BOUND);
            }
        }
    }
}