source: trunk/sources/HeuristicLab.Problems.VehicleRouting/3.3/Encodings/Potvin/Manipulators/PotvinOneLevelExchangeManipulator.cs @ 8978

#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 System.Collections.Generic;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Data;

namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
  [Item("PotvinOneLevelExchangeMainpulator", "The 1M operator which manipulates a VRP representation.  It is implemented as described in Potvin, J.-Y. and Bengio, S. (1996). The Vehicle Routing Problem with Time Windows - Part II: Genetic Search. INFORMS Journal of Computing, 8:165–172.")]
  [StorableClass]
  public sealed class PotvinOneLevelExchangeMainpulator : PotvinManipulator {
    [StorableConstructor]
    private PotvinOneLevelExchangeMainpulator(bool deserializing) : base(deserializing) { }
    private PotvinOneLevelExchangeMainpulator(PotvinOneLevelExchangeMainpulator original, Cloner cloner)
      : base(original, cloner) {
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new PotvinOneLevelExchangeMainpulator(this, cloner);
    }
    public PotvinOneLevelExchangeMainpulator() : base() { }

    public static void Apply(IRandom random, PotvinEncoding individual, 
     DoubleArray dueTime, DoubleArray readyTime, DoubleArray serviceTime, DoubleArray demand,
      DoubleValue capacity, DistanceMatrix distMatrix, bool allowInfeasible) {
      int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
      Tour route1 =
        individual.Tours[selectedIndex];

      List<int> replaced = new List<int>();
      for (int i = 0; i < route1.Cities.Count; i++) {
        int insertedRoute, insertedPlace;

        if (FindInsertionPlace(individual, route1.Cities[i], selectedIndex,
          dueTime, serviceTime, readyTime, demand, capacity,
          distMatrix, allowInfeasible,
          out insertedRoute, out insertedPlace)) {
          individual.Tours[insertedRoute].Cities.Insert(insertedPlace, route1.Cities[i]);
          replaced.Add(route1.Cities[i]);
        }
      }

      route1.Cities.RemoveAll(
        new System.Predicate<int>(
          delegate(int val) {
            return (replaced.Contains(val));
          }
        )
      );

      if (route1.Cities.Count == 0)
        individual.Tours.Remove(route1);
    }

    protected override void Manipulate(IRandom random, PotvinEncoding individual) {
      BoolValue useDistanceMatrix = UseDistanceMatrixParameter.ActualValue;
      DoubleMatrix coordinates = CoordinatesParameter.ActualValue;
      DistanceMatrix distMatrix = VRPUtilities.GetDistanceMatrix(coordinates, DistanceMatrixParameter, useDistanceMatrix);
      DoubleArray dueTime = DueTimeParameter.ActualValue;
      DoubleArray readyTime = ReadyTimeParameter.ActualValue;
      DoubleArray serviceTime = ServiceTimeParameter.ActualValue;
      DoubleArray demand = DemandParameter.ActualValue;
      DoubleValue capacity = CapacityParameter.ActualValue;

      bool allowInfeasible = AllowInfeasibleSolutions.Value.Value;

      Apply(random, individual, dueTime, readyTime, serviceTime, demand, capacity, distMatrix, allowInfeasible); 
    }
  }
}