1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using System.IO;
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25 | using System.Linq;
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26 | using System.Reflection;
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27 | using System.Text.RegularExpressions;
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28 |
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29 | namespace HeuristicLab.Problems.Instances.TSPLIB {
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30 | public class TSPLIBTSPInstanceProvider : ProblemInstanceProvider<ITSPInstance> {
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31 |
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32 | public override string Name {
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33 | get { return "TSPLIB (symmetric TSP)"; }
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34 | }
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35 |
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36 | public override string Description {
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37 | get { return "Traveling Salesman Problem Library"; }
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38 | }
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39 |
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40 | public override Uri Link {
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41 | get { return new Uri("http://comopt.ifi.uni-heidelberg.de/software/TSPLIB95/"); }
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42 | }
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43 |
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44 | public override IEnumerable<IInstanceDescriptor> GetInstanceDescriptors() {
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45 | var solutions = Assembly.GetExecutingAssembly()
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46 | .GetManifestResourceNames()
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47 | .Where(x => Regex.Match(x, @".*\.Data\.TSP\..*").Success)
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48 | .Where(x => x.EndsWith(".opt.tour"))
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49 | .ToDictionary(x => x.Substring(0, x.Length - ".opt.tour".Length) + ".tsp", x => x);
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50 |
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51 | return Assembly.GetExecutingAssembly()
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52 | .GetManifestResourceNames()
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53 | .Where(x => Regex.Match(x, @".*\.Data\.TSP\..*").Success)
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54 | .Where(x => x.EndsWith(".tsp"))
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55 | .OrderBy(x => x)
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56 | .Select(x => new TSPLIBInstanceDescriptor(GetPrettyName(x), GetDescription(), x, solutions.ContainsKey(x) ? solutions[x] : String.Empty));
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57 | }
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58 |
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59 | public override ITSPInstance GetInstance(IInstanceDescriptor id) {
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60 | var descriptor = (TSPLIBInstanceDescriptor)id;
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61 | var instance = new TSPLIBTSPInstance();
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62 | using (var stream = Assembly.GetExecutingAssembly()
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63 | .GetManifestResourceStream(descriptor.InstanceIdentifier)) {
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64 | var parser = new TSPLIBParser(stream);
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65 | parser.Parse();
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66 | if (parser.FixedEdges != null) throw new InvalidDataException("TSP instance " + parser.Name + " contains fixed edges which are not supported by HeuristicLab.");
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67 |
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68 | instance.Dimension = parser.Dimension;
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69 | instance.Coordinates = parser.Vertices != null ? parser.Vertices : parser.DisplayVertices;
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70 | instance.Distances = parser.Distances;
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71 | switch (parser.EdgeWeightType) {
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72 | case TSPLIBEdgeWeightTypes.ATT:
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73 | instance.DistanceMeasure = TSPDistanceMeasure.Att; break;
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74 | case TSPLIBEdgeWeightTypes.CEIL_2D:
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75 | instance.DistanceMeasure = TSPDistanceMeasure.UpperEuclidean; break;
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76 | case TSPLIBEdgeWeightTypes.EUC_2D:
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77 | instance.DistanceMeasure = TSPDistanceMeasure.RoundedEuclidean; break;
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78 | case TSPLIBEdgeWeightTypes.EUC_3D:
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79 | throw new InvalidDataException("3D coordinates are not supported.");
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80 | case TSPLIBEdgeWeightTypes.EXPLICIT:
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81 | instance.DistanceMeasure = TSPDistanceMeasure.Direct; break;
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82 | case TSPLIBEdgeWeightTypes.GEO:
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83 | instance.DistanceMeasure = TSPDistanceMeasure.Geo; break;
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84 | case TSPLIBEdgeWeightTypes.MAN_2D:
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85 | instance.DistanceMeasure = TSPDistanceMeasure.Manhattan; break;
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86 | case TSPLIBEdgeWeightTypes.MAN_3D:
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87 | throw new InvalidDataException("3D coordinates are not supported.");
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88 | case TSPLIBEdgeWeightTypes.MAX_2D:
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89 | instance.DistanceMeasure = TSPDistanceMeasure.Maximum; break;
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90 | case TSPLIBEdgeWeightTypes.MAX_3D:
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91 | throw new InvalidDataException("3D coordinates are not supported.");
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92 | default:
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93 | throw new InvalidDataException("The given edge weight is not supported by HeuristicLab.");
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94 | }
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95 |
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96 | instance.Name = parser.Name;
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97 | instance.Description = parser.Comment
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98 | + Environment.NewLine + Environment.NewLine
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99 | + GetDescription();
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100 |
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101 | if (!String.IsNullOrEmpty(descriptor.SolutionIdentifier)) {
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102 | using (Stream solStream = Assembly.GetExecutingAssembly()
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103 | .GetManifestResourceStream(descriptor.SolutionIdentifier)) {
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104 | var tourParser = new TSPLIBParser(solStream);
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105 | tourParser.Parse();
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106 | instance.BestKnownTour = tourParser.Tour[0];
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107 | }
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108 | }
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109 | }
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110 | return instance;
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111 | }
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112 |
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113 | private string GetPrettyName(string instanceIdentifier) {
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114 | return Regex.Match(instanceIdentifier, GetType().Namespace + @"\.Data\.TSP\.(.*)\.tsp").Groups[1].Captures[0].Value;
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115 | }
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116 |
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117 | private string GetDescription() {
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118 | return "Embedded instance of plugin version " + Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyFileVersionAttribute), true).Cast<AssemblyFileVersionAttribute>().First().Version + ".";
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119 | }
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120 | }
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121 | }
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