org.btrplace.scheduler.choco.DefaultObjectiveAlterer Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 University Nice Sophia Antipolis
 *
 * This file is part of btrplace.
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 */

package org.btrplace.scheduler.choco;

import org.chocosolver.solver.ResolutionPolicy;

/**
 * Default objective alterer.
 * The new bound is the current computed value plus or minus 1 depending
 * on the resolution policy.
 *
 * @author Fabien Hermenier
 */
public class DefaultObjectiveAlterer implements ObjectiveAlterer {

    @Override
    public int newBound(ReconfigurationProblem rp, int currentValue) {
        if (rp.getResolutionPolicy() == ResolutionPolicy.MAXIMIZE) {
            return currentValue + 1;
        }
        return currentValue - 1;
    }
}