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source: branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Potvin/Moves/PickupDelivery/PDExchange/PotvinPDExchangeExhaustiveMoveGenerator.cs @ 6851

Last change on this file since 6851 was 6851, checked in by svonolfe, 11 years ago

Added support for multi depot CVRP instances (#1177)

File size: 3.6 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using HeuristicLab.Core;
24using HeuristicLab.Optimization;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26using HeuristicLab.Parameters;
27using System.Collections.Generic;
28using HeuristicLab.Problems.VehicleRouting.Interfaces;
29using HeuristicLab.Common;
30using HeuristicLab.Problems.VehicleRouting.Variants;
31
32namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
33  [Item("PotvinPDExchangeExhaustiveMoveGenerator", "Generates exchange moves from a given PDP encoding.")]
34  [StorableClass]
35  public sealed class PotvinPDExchangeExhaustiveMoveGenerator : PotvinPDExchangeMoveGenerator, IExhaustiveMoveGenerator {
36    public override IDeepCloneable Clone(Cloner cloner) {
37      return new PotvinPDExchangeExhaustiveMoveGenerator(this, cloner);
38    }
39
40    [StorableConstructor]
41    private PotvinPDExchangeExhaustiveMoveGenerator(bool deserializing) : base(deserializing) { }
42
43    public PotvinPDExchangeExhaustiveMoveGenerator()
44      : base() {
45    }
46
47    private PotvinPDExchangeExhaustiveMoveGenerator(PotvinPDExchangeExhaustiveMoveGenerator original, Cloner cloner)
48      : base(original, cloner) {
49    }
50
51    protected override PotvinPDExchangeMove[] GenerateMoves(PotvinEncoding individual, IVRPProblemInstance problemInstance) {
52      List<PotvinPDExchangeMove> result = new List<PotvinPDExchangeMove>();
53      IPickupAndDeliveryProblemInstance pdp = problemInstance as IPickupAndDeliveryProblemInstance;
54
55      int max = individual.Tours.Count;
56      if (individual.Tours.Count < problemInstance.Vehicles.Value)
57        max = max - 1;
58
59      for (int i = 0; i < individual.Tours.Count; i++) {
60        for (int j = 0; j < individual.Tours[i].Stops.Count; j++) {
61          for (int k = 0; k <= max; k++) {
62            if (k != i) {
63              int city1 = individual.Tours[i].Stops[j];
64              if (pdp == null || pdp.GetDemand(city1) >= 0) {
65                for (int l = 0; l < individual.Tours[k].Stops.Count; l++) {
66                  int city2 = individual.Tours[k].Stops[l];
67                  if (pdp == null || pdp.GetDemand(city2) >= 0) {
68                    bool valid = pdp == null ||
69                      (pdp.PickupDeliveryLocation[city2] != pdp.PickupDeliveryLocation[city1] &&
70                       pdp.PickupDeliveryLocation[city2] != city1 &&
71                       pdp.PickupDeliveryLocation[city1] != city2);
72
73                    if (valid) {
74                      PotvinPDExchangeMove move = new PotvinPDExchangeMove(
75                        city1, i, k, city2, individual);
76
77                      result.Add(move);
78                    }
79                  }
80                }
81              }
82            }
83          }
84        }
85      }
86
87      return result.ToArray();
88    }
89  }
90}
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