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source: stable/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/General/TourEncoding.cs

Last change on this file was 17181, checked in by swagner, 5 years ago

#2875: Merged r17180 from trunk to stable

File size: 4.2 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 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.Collections.Generic;
23using System.Drawing;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HEAL.Attic;
27using HeuristicLab.Problems.VehicleRouting.Interfaces;
28
29namespace HeuristicLab.Problems.VehicleRouting.Encodings.General {
30  [Item("TourEncoding", "Represents a base class for tour encodings of VRP solutions.")]
31  [StorableType("FC5DBAE6-05D9-4C55-AA85-6E3C2330700F")]
32  public abstract class TourEncoding : Item, IVRPEncoding {
33    public static new Image StaticItemImage {
34      get { return HeuristicLab.Common.Resources.VSImageLibrary.Class; }
35    }
36
37    #region IVRPEncoding Members
38    public virtual void Repair() {
39      List<Tour> toBeRemoved = new List<Tour>();
40      foreach (Tour tour in Tours) {
41        if (tour.Stops.Count == 0)
42          toBeRemoved.Add(tour);
43      }
44
45      foreach (Tour tour in toBeRemoved)
46        Tours.Remove(tour);
47
48      while (Tours.Count > ProblemInstance.Vehicles.Value) {
49        Tour tour = Tours[Tours.Count - 1];
50        Tours[Tours.Count - 2].Stops.AddRange(tour.Stops);
51
52        Tours.Remove(tour);
53      }
54    }
55
56    public virtual List<Tour> GetTours() {
57      List<Tour> result = new List<Tour>();
58      foreach (Tour tour in Tours)
59        result.Add(tour.Clone() as Tour);
60
61      return result;
62    }
63
64    public int GetTourIndex(Tour tour) {
65      int index = -1;
66
67      for (int i = 0; i < Tours.Count; i++) {
68        if (Tours[i].IsEqual(tour)) {
69          index = i;
70          break;
71        }
72      }
73
74      return index;
75    }
76
77    public virtual int GetVehicleAssignment(int tour) {
78      return tour;
79    }
80
81    public int Cities {
82      get {
83        int cities = 0;
84
85        foreach (Tour tour in Tours) {
86          cities += tour.Stops.Count;
87        }
88
89        return cities;
90      }
91    }
92    #endregion
93
94    [Storable]
95    public ItemList<Tour> Tours { get; set; }
96
97    [Storable]
98    protected IVRPProblemInstance ProblemInstance { get; set; }
99
100    public TourEncoding(IVRPProblemInstance problemInstance) {
101      Tours = new ItemList<Tour>();
102
103      ProblemInstance = problemInstance;
104    }
105
106    [StorableConstructor]
107    protected TourEncoding(StorableConstructorFlag _) : base(_) {
108    }
109
110    protected TourEncoding(TourEncoding original, Cloner cloner)
111      : base(original, cloner) {
112      this.Tours = (ItemList<Tour>)cloner.Clone(original.Tours);
113      if (original.ProblemInstance != null && cloner.ClonedObjectRegistered(original.ProblemInstance))
114        this.ProblemInstance = (IVRPProblemInstance)cloner.Clone(original.ProblemInstance);
115      else
116        this.ProblemInstance = original.ProblemInstance;
117    }
118
119    public static void ConvertFrom(IVRPEncoding encoding, TourEncoding solution, IVRPProblemInstance problemInstance) {
120      solution.Tours = new ItemList<Tour>(encoding.GetTours());
121      solution.Repair();
122    }
123
124    public static void ConvertFrom(List<int> route, TourEncoding solution) {
125      solution.Tours = new ItemList<Tour>();
126
127      Tour tour = new Tour();
128      for (int i = 0; i < route.Count; i++) {
129        if (route[i] <= 0) {
130          if (tour.Stops.Count > 0) {
131            solution.Tours.Add(tour);
132            tour = new Tour();
133          }
134        } else {
135          tour.Stops.Add(route[i]);
136        }
137      }
138
139      solution.Repair();
140    }
141  }
142}
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