source: branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Evaluators/GQAPPenaltyLevelEvaluator.cs @ 8993

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment {
  [Item("GQAPPenaltyLevelEvaluator", "Evaluates solutions to the generalized quadratic assignment problem using a penalty level strategy. Infeasible solutions have a certain base quality to which the amount of constraint violation is added.")]
  [StorableClass]
  public class GQAPPenaltyLevelEvaluator : GQAPEvaluator {
    public static readonly string PenaltyDescription = "The percentage of the expected random quality that should be used as a base level for infeasible solutions.";

    protected IValueParameter<PercentValue> PenaltyParameter {
      get { return (IValueParameter<PercentValue>)Parameters["Penalty"]; }
    }

    public PercentValue Penalty {
      get { return PenaltyParameter.Value; }
      set { PenaltyParameter.Value = value; }
    }

    [StorableConstructor]
    protected GQAPPenaltyLevelEvaluator(bool deserializing) : base(deserializing) { }
    protected GQAPPenaltyLevelEvaluator(GQAPPenaltyLevelEvaluator original, Cloner cloner) : base(original, cloner) { }
    public GQAPPenaltyLevelEvaluator()
      : base() {
      Parameters.Add(new ValueParameter<PercentValue>("Penalty", PenaltyDescription, new PercentValue(1), true));
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new GQAPPenaltyLevelEvaluator(this, cloner);
    }

    public override double GetFitness(double flowDistanceQuality,
      double installationQuality, double overbookedCapacity,
      double transportationCosts, double expectedRandomQuality) {
      if (overbookedCapacity > 0) {
        return expectedRandomQuality * Penalty.Value + overbookedCapacity;
      } else {
        return installationQuality
          + transportationCosts * flowDistanceQuality;
      }
    }
  }
}