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.QAPLIB {
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30 | public class QAPLIBInstanceProvider : IProblemInstanceProvider<IQAPInstance> {
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31 | public string Name {
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32 | get { return "QAPLIB"; }
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33 | }
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34 |
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35 | public string Description {
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36 | get { return "Quadratic Assignment Problem Library"; }
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37 | }
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38 |
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39 | public Uri Link {
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40 | get { return new Uri("http://www.seas.upenn.edu/qaplib/"); }
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41 | }
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42 |
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43 | public IEnumerable<IInstanceDescriptor> GetInstanceDescriptors() {
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44 | var solutions = Assembly.GetExecutingAssembly()
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45 | .GetManifestResourceNames()
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46 | .Where(x => x.EndsWith(".sln"))
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47 | .ToDictionary(x => Path.GetFileNameWithoutExtension(x) + ".dat", x => x);
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48 |
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49 | return Assembly.GetExecutingAssembly()
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50 | .GetManifestResourceNames()
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51 | .Where(x => x.EndsWith(".dat"))
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52 | .OrderBy(x => x)
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53 | .Select(x => new QAPLIBInstanceDescriptor(GetPrettyName(x), GetDescription(), x, solutions.ContainsKey(x) ? solutions[x] : String.Empty));
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54 | }
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55 |
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56 | public IQAPInstance GetInstance(IInstanceDescriptor id) {
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57 | var descriptor = (QAPLIBInstanceDescriptor)id;
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58 | var instance = new QAPLIBInstance();
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59 | using (var stream = Assembly.GetExecutingAssembly()
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60 | .GetManifestResourceStream(descriptor.InstanceIdentifier)) {
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61 | QAPLIBParser datParser = new QAPLIBParser();
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62 | datParser.Parse(stream);
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63 | if (datParser.Error != null) throw datParser.Error;
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64 | instance.Distances = datParser.Distances;
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65 | instance.Weights = datParser.Weights;
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66 |
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67 | instance.Name = id.Name;
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68 | instance.Description = id.Description;
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69 |
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70 | if (!String.IsNullOrEmpty(descriptor.SolutionIdentifier)) {
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71 | using (Stream solStream = Assembly.GetExecutingAssembly()
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72 | .GetManifestResourceStream(descriptor.SolutionIdentifier)) {
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73 | QAPLIBSolutionParser slnParser = new QAPLIBSolutionParser();
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74 | slnParser.Parse(solStream, true);
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75 | if (slnParser.Error != null) throw slnParser.Error;
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76 |
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77 | instance.BestKnownAssignment = slnParser.Assignment;
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78 | instance.BestKnownQuality = slnParser.Quality;
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79 | }
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80 | }
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81 | }
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82 | return instance;
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83 | }
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84 |
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85 | private string GetPrettyName(string instanceIdentifier) {
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86 | return Regex.Match(instanceIdentifier, GetType().Namespace + @"\.Data\.(.*)\.dat").Groups[1].Captures[0].Value;
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87 | }
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88 |
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89 | private string GetDescription() {
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90 | return "Embedded instance of plugin version " + Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyFileVersionAttribute), true).Cast<AssemblyFileVersionAttribute>().First().Version + ".";
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91 | }
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92 | }
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93 | }
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