org.jamesframework.core.problems.objectives.MinMaxObjective Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of james-core Show documentation

The James core module is part of the James framework for optimization using local search metaheuristics in Java. The core contains general components to model problems, objectives and constraints, as well as generic algorithms to solve the problems. Moreover, the core provides implementations of specific utilities for subset selection.

There is a newer version: 1.2

Show newest version

//  Copyright 2014 Herman De Beukelaer
//
//  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 org.jamesframework.core.problems.objectives;

import org.jamesframework.core.problems.solutions.Solution;

/**
 * Abstract objective that handles minimization/maximization settings. The default setting is maximization.
 * 
 * @author Herman De Beukelaer
 * @param  solution type to be evaluated, required to extend {@link Solution}
 * @param  underlying data type
 */
public abstract class MinMaxObjective implements Objective{
    
    // indicates whether the objective is minimizing
    private boolean minimizing;
    
    /**
     * By default, objectives are maximizing.
     */
    public MinMaxObjective(){
        minimizing = false;
    }

    @Override
    public final boolean isMinimizing() {
        return minimizing;
    }
    
    /**
     * Turn this objective into a minimizing objective.
     */
    public final void setMinimizing(){
        minimizing = true;
    }
    
    /**
     * Turn this objective into a maximizing objective.
     */
    public final void setMaximizing(){
        minimizing = false;
    }

}