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source: branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/General/TourEncoding.cs @ 7543

Last change on this file since 7543 was 7543, checked in by svonolfe, 12 years ago

Fixed minor issues (#1177)

File size: 4.1 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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Encodings.PermutationEncoding;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27using System.Drawing;
28using System.Collections.Generic;
29using HeuristicLab.Problems.VehicleRouting.Interfaces;
30
31namespace HeuristicLab.Problems.VehicleRouting.Encodings.General {
32  [Item("TourEncoding", "Represents a base class for tour encodings of VRP solutions.")]
33  [StorableClass]
34  public abstract class TourEncoding : Item, IVRPEncoding {
35    public static new Image StaticItemImage {
36      get { return HeuristicLab.Common.Resources.VSImageLibrary.Class; }
37    }
38   
39    #region IVRPEncoding Members
40    public virtual void Repair() {
41      List<Tour> toBeRemoved = new List<Tour>();
42      foreach (Tour tour in Tours) {
43        if (tour.Stops.Count == 0)
44          toBeRemoved.Add(tour);
45      }
46
47      foreach (Tour tour in toBeRemoved)
48        Tours.Remove(tour);
49
50      while (Tours.Count > ProblemInstance.Vehicles.Value) {
51        Tour tour = Tours[Tours.Count - 1];
52        Tours[Tours.Count - 2].Stops.AddRange(tour.Stops);
53
54        Tours.Remove(tour);
55      }
56    }
57
58    public virtual List<Tour> GetTours() {     
59     List<Tour> result = new List<Tour>();
60     foreach (Tour tour in Tours)
61       result.Add(tour.Clone() as Tour);
62
63     return result;
64    }
65
66    public int GetTourIndex(Tour tour) {
67      int index = -1;
68
69      for (int i = 0; i < Tours.Count; i++) {
70        if (Tours[i].IsEqual(tour)) {
71          index = i;
72          break;
73        }
74      }
75
76      return index;
77    }
78
79    public virtual int GetVehicleAssignment(int tour) {
80      return tour;
81    }
82
83    public int Cities {
84      get
85      {
86        int cities = 0;
87
88        foreach (Tour tour in Tours) {
89          cities += tour.Stops.Count;
90        }
91
92        return cities;
93      }
94    }
95    #endregion
96
97    [Storable]
98    public ItemList<Tour> Tours { get; set; }
99
100    [Storable]
101    protected IVRPProblemInstance ProblemInstance { get; set; }
102
103    public TourEncoding(IVRPProblemInstance problemInstance) {
104      Tours = new ItemList<Tour>();
105
106      ProblemInstance = problemInstance;
107    }
108
109    [StorableConstructor]
110    protected TourEncoding(bool serializing)
111      : base(serializing) {
112    }
113
114    protected TourEncoding(TourEncoding original, Cloner cloner)
115      : base(original, cloner) {
116       this.Tours = (ItemList<Tour>)cloner.Clone(original.Tours);
117       this.ProblemInstance = original.ProblemInstance;
118    }
119
120    public static void ConvertFrom(IVRPEncoding encoding, TourEncoding solution, IVRPProblemInstance problemInstance) {
121      solution.Tours = new ItemList<Tour>(encoding.GetTours());
122      solution.Repair();
123    }
124
125    public static void ConvertFrom(List<int> route, TourEncoding solution) {
126      solution.Tours = new ItemList<Tour>();
127
128      Tour tour = new Tour();
129      for (int i = 0; i < route.Count; i++) {
130        if (route[i] <= 0) {
131          if (tour.Stops.Count > 0) {
132            solution.Tours.Add(tour);
133            tour = new Tour();
134          }
135        } else {
136          tour.Stops.Add(route[i]);
137        }
138      }
139
140      solution.Repair();
141    }
142  }
143}
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