source: branches/2936_GQAPIntegration/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Moves/NMoveTabuMaker.cs

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2018 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.Encodings.IntegerVectorEncoding;
using HeuristicLab.Optimization.Operators;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HEAL.Attic;

namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment.Moves {
  [Item("N-Move TabuMaker", "Declares an N-Move tabu.")]
  [StorableType("BE81C264-2DD8-4A2C-8796-D0D1E121FF53")]
  public class NMoveTabuMaker : TabuMaker, IGQAPNMoveOperator, IMoveQualityAwareGQAPOperator {

    public ILookupParameter<IntegerVector> AssignmentParameter {
      get { return (ILookupParameter<IntegerVector>)Parameters["Assignment"]; }
    }
    public ILookupParameter<NMove> MoveParameter {
      get { return (ILookupParameter<NMove>)Parameters["Move"]; }
    }
    public ILookupParameter<Evaluation> MoveEvaluationParameter {
      get { return (ILookupParameter<Evaluation>)Parameters["MoveEvaluation"]; }
    }

    [StorableConstructor]
    protected NMoveTabuMaker(StorableConstructorFlag _) : base(_) { }
    protected NMoveTabuMaker(NMoveTabuMaker original, Cloner cloner) : base(original, cloner) { }
    public NMoveTabuMaker()
      : base() {
      Parameters.Add(new LookupParameter<IntegerVector>("Assignment", GQAPSolutionCreator.AssignmentDescription));
      Parameters.Add(new LookupParameter<NMove>("Move", GQAPNMoveGenerator.MoveDescription));
      Parameters.Add(new LookupParameter<Evaluation>("MoveEvaluation", GQAPNMoveEvaluator.MoveEvaluationDescription));
    }

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

    protected override IItem GetTabuAttribute(bool maximization, double quality, double moveQuality) {
      var move = MoveParameter.ActualValue;
      var assignment = AssignmentParameter.ActualValue;
      double baseQuality = moveQuality;
      if (maximization && quality > moveQuality || !maximization && quality < moveQuality) baseQuality = quality; // we make an uphill move, the lower bound is the solution quality
      return new NMoveAbsoluteTabuAttribute(move, assignment, baseQuality);
    }
  }
}