source: trunk/sources/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Alba/Moves/LambdaInterchange/AlbaExhaustiveLambdaInterchangeMoveGenerator.cs @ 12505

#region License Information
/* HeuristicLab
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 *
 * This file is part of HeuristicLab.
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 * GNU General Public License for more details.
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#endregion

using System;
using System.Collections.Generic;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Optimization;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Problems.VehicleRouting.Interfaces;

namespace HeuristicLab.Problems.VehicleRouting.Encodings.Alba {
  [Item("AlbaExhaustiveLambdaInterchangeMoveGenerator", "Generates all possible lambda interchange moves from a given VRP encoding.  It is implemented as described in Alba, E. and Dorronsoro, B. (2004). Solving the Vehicle Routing Problem by Using Cellular Genetic Algorithms.")]
  [StorableClass]
  public sealed class AlbaExhaustiveLambdaInterchangeMoveGenerator : AlbaLambdaInterchangeMoveGenerator, IExhaustiveMoveGenerator, IAlbaLambdaInterchangeMoveOperator {
    [StorableConstructor]
    private AlbaExhaustiveLambdaInterchangeMoveGenerator(bool deserializing) : base(deserializing) { }

    public AlbaExhaustiveLambdaInterchangeMoveGenerator()
      : base() {
    }

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

    private AlbaExhaustiveLambdaInterchangeMoveGenerator(AlbaExhaustiveLambdaInterchangeMoveGenerator original, Cloner cloner)
      : base(original, cloner) {
    }

    protected override AlbaLambdaInterchangeMove[] GenerateMoves(AlbaEncoding individual, IVRPProblemInstance problemInstance, int lambda) {
      List<AlbaLambdaInterchangeMove> moves = new List<AlbaLambdaInterchangeMove>();

      List<Tour> tours = individual.GetTours();

      for (int tour1Index = 0; tour1Index < tours.Count; tour1Index++) {
        Tour tour1 = tours[tour1Index];
        for (int tour2Index = tour1Index + 1; tour2Index < tours.Count; tour2Index++) {
          Tour tour2 = tours[tour2Index];

          for (int length1 = 0; length1 <= Math.Min(lambda, tour1.Stops.Count); length1++) {
            for (int length2 = 0; length2 <= Math.Min(lambda, tour2.Stops.Count); length2++) {
              if (length1 != 0 || length2 != 0) {
                for (int index1 = 0; index1 < tour1.Stops.Count - length1 + 1; index1++) {
                  for (int index2 = 0; index2 < tour2.Stops.Count - length2 + 1; index2++) {
                    moves.Add(new AlbaLambdaInterchangeMove(tour1Index, index1, length1,
                      tour2Index, index2, length2, individual));
                  }
                }
              }
            }
          }
        }
      }

      return moves.ToArray();
    }
  }
}