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/*
* This file is part of choco-solver, http://choco-solver.org/
*
* Copyright (c) 2023, IMT Atlantique. All rights reserved.
*
* Licensed under the BSD 4-clause license.
*
* See LICENSE file in the project root for full license information.
*/
package org.chocosolver.util.objects;
/**
*
* Project: choco-solver.
*
* @author Charles Prud'homme
* @since 30/10/2018.
*/
public class ArrayVal implements IVal {
private final double[] Av;
private final double[] mAv;
private final int size;
private final int os; // offset
public ArrayVal(int size, int os) {
this.size = size;
this.os = os;
this.Av = new double[size];
this.mAv = new double[size];
}
@Override
public double activity(int value) {
return Av[value - os];
}
@Override
public void setactivity(int value, double activity) {
Av[value - os] = activity;
}
@Override
public void update(int nb_probes) {
double activity, oldmA, U;
for (int j = 0; j < Av.length; j++) {
activity = Av[j];
oldmA = mAv[j];
U = activity - oldmA;
mAv[j] += (U / nb_probes);
}
}
@Override
public void transfer() {
System.arraycopy(mAv, 0, Av, 0, size);
}
}