[7881] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[11171] | 3 | * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[7881] | 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 | using ICSharpCode.SharpZipLib.Zip;
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| 29 |
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| 30 | namespace HeuristicLab.Problems.Instances.VehicleRouting {
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[11287] | 31 | public abstract class VRPInstanceProvider<T> : ProblemInstanceProvider<T>, IVRPInstanceProvider where T : IVRPData {
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[7881] | 32 | protected abstract string FileName { get; }
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| 33 |
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| 34 | public override IEnumerable<IDataDescriptor> GetDataDescriptors() {
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| 35 | Dictionary<string, string> solutions = new Dictionary<string, string>();
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| 36 | var solutionsArchiveName = GetResourceName(FileName + @"\.opt\.zip");
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| 37 | if (!String.IsNullOrEmpty(solutionsArchiveName)) {
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| 38 | using (var solutionsZipFile = new ZipInputStream(GetType().Assembly.GetManifestResourceStream(solutionsArchiveName))) {
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| 39 | foreach (var entry in GetZipContents(solutionsZipFile))
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| 40 | solutions.Add(entry.Substring(0, entry.Length - ".opt".Length) + "." + FileName, entry);
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| 41 | }
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| 42 | }
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| 43 | var instanceArchiveName = GetResourceName(FileName + @"\.zip");
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| 44 | if (String.IsNullOrEmpty(instanceArchiveName)) yield break;
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| 45 |
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| 46 | using (var instanceStream = new ZipInputStream(GetType().Assembly.GetManifestResourceStream(instanceArchiveName))) {
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| 47 | foreach (var entry in GetZipContents(instanceStream).OrderBy(x => x)) {
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| 48 | string solutionEntry = entry.Substring(0, entry.Length - ".opt".Length) + "." + FileName;
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| 49 | yield return new VRPDataDescriptor(Path.GetFileNameWithoutExtension(entry), GetInstanceDescription(), entry, solutions.ContainsKey(solutionEntry) ? solutions[solutionEntry] : String.Empty);
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| 50 | }
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| 51 | }
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| 52 | }
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| 53 |
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[11286] | 54 | public override T LoadData(IDataDescriptor id) {
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[7881] | 55 | var descriptor = (VRPDataDescriptor)id;
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| 56 | var instanceArchiveName = GetResourceName(FileName + @"\.zip");
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| 57 | using (var instancesZipFile = new ZipFile(GetType().Assembly.GetManifestResourceStream(instanceArchiveName))) {
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| 58 | var entry = instancesZipFile.GetEntry(descriptor.InstanceIdentifier);
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| 59 | var stream = instancesZipFile.GetInputStream(entry);
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| 60 | var instance = LoadData(stream);
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| 61 | if (string.IsNullOrEmpty(instance.Name)) {
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| 62 | instance.Name = Path.GetFileNameWithoutExtension(entry.ToString());
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| 63 | }
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| 64 |
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| 65 | if (!String.IsNullOrEmpty(descriptor.SolutionIdentifier)) {
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| 66 | var solutionsArchiveName = GetResourceName(FileName + @"\.opt\.zip");
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| 67 | using (var solutionsZipFile = new ZipFile(GetType().Assembly.GetManifestResourceStream(solutionsArchiveName))) {
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| 68 | entry = solutionsZipFile.GetEntry(descriptor.SolutionIdentifier);
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| 69 | stream = solutionsZipFile.GetInputStream(entry);
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| 70 | LoadSolution(stream, instance);
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| 71 | }
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| 72 | }
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| 73 |
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| 74 | return instance;
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| 75 | }
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| 76 | }
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| 77 |
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[11286] | 78 | private static void LoadSolution(Stream stream, T instance) {
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[7881] | 79 | List<List<int>> routes = new List<List<int>>();
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| 80 |
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| 81 | using (StreamReader reader = new StreamReader(stream)) {
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| 82 | String line;
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| 83 | while ((line = reader.ReadLine()) != null) {
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| 84 | if (line.StartsWith("Route")) {
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| 85 | string[] token = line.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
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| 86 |
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| 87 | List<int> route = new List<int>();
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| 88 |
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| 89 | for (int i = 2; i < token.Length; i++) {
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| 90 | route.Add(int.Parse(token[i]) - 1);
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| 91 | }
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| 92 |
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| 93 | routes.Add(route);
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| 94 | }
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[11295] | 95 |
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| 96 | if (line.StartsWith("Solution")) {
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| 97 | if (routes.Any()) {
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| 98 | // Skip remaining solutions since only one "best solution" is stored
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| 99 | break;
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| 100 | }
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| 101 | }
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[7881] | 102 | }
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| 103 | }
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| 104 |
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| 105 | instance.BestKnownTour = routes.Select(x => x.ToArray()).ToArray();
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| 106 | }
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| 107 |
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[11286] | 108 | public static void LoadSolution(string path, T instance) {
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[7881] | 109 | using (FileStream stream = new FileStream(path, FileMode.Open)) {
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| 110 | LoadSolution(stream, instance);
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| 111 | }
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| 112 | }
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| 113 |
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[11286] | 114 | protected abstract T LoadData(Stream stream);
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[7881] | 115 |
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[11287] | 116 | public IVRPData Import(string vrpFile, string tourFile) {
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[8192] | 117 | var data = ImportData(vrpFile);
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[7881] | 118 | if (!String.IsNullOrEmpty(tourFile)) {
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| 119 | LoadSolution(tourFile, data);
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| 120 | }
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| 121 | return data;
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| 122 | }
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| 123 |
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[11287] | 124 | public void Export(IVRPData instance, string path) {
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| 125 | ExportData((T)instance, path);
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[8192] | 126 | }
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| 127 |
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[7881] | 128 | protected virtual string GetResourceName(string fileName) {
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| 129 | return Assembly.GetExecutingAssembly().GetManifestResourceNames()
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| 130 | .Where(x => Regex.Match(x, @".*\.Data\." + fileName).Success).SingleOrDefault();
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| 131 | }
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| 132 |
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| 133 | protected virtual string GetInstanceDescription() {
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| 134 | return "Embedded instance of plugin version " + Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyFileVersionAttribute), true).Cast<AssemblyFileVersionAttribute>().First().Version + ".";
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| 135 | }
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| 136 |
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| 137 | protected IEnumerable<string> GetZipContents(ZipInputStream zipFile) {
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| 138 | ZipEntry entry;
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| 139 | while ((entry = zipFile.GetNextEntry()) != null) {
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| 140 | yield return entry.Name;
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| 141 | }
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| 142 | }
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| 143 | }
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| 144 | }
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