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source: branches/ProblemInstancesRegressionAndClassification/HeuristicLab.Problems.Instances.Classification/3.4/ResourceClassificationInstanceProvider.cs @ 7759

Last change on this file since 7759 was 7759, checked in by sforsten, 12 years ago

#1784:

  • deleted ClassificationData and RegressionData. RegressionProblemData and ClassificationProblemData are used instead
  • deleted not needed Transformer
  • ValueGenerator is now a static class and yield return is used return IEnumerable
File size: 3.5 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 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;
23using System.Collections.Generic;
24using System.IO;
25using System.Linq;
26using System.Reflection;
27using System.Text.RegularExpressions;
28using HeuristicLab.Problems.DataAnalysis;
29using ICSharpCode.SharpZipLib.Zip;
30
31namespace HeuristicLab.Problems.Instances.Classification {
32  public abstract class ResourceClassificationInstanceProvider : ClassificationInstanceProvider {
33
34    protected abstract string FileName { get; }
35
36    public override IEnumerable<IDataDescriptor> GetDataDescriptors() {
37      var solutionsArchiveName = GetResourceName(FileName + @"\.zip");
38      if (!String.IsNullOrEmpty(solutionsArchiveName)) {
39        using (var solutionsZipFile = new ZipInputStream(GetType().Assembly.GetManifestResourceStream(solutionsArchiveName))) {
40          foreach (var entry in GetZipContents(solutionsZipFile).OrderBy(x => x))
41            yield return new ResourceClassificationDataDescriptor(Path.GetFileNameWithoutExtension(entry), Description, entry);
42        }
43      }
44    }
45
46    public override ClassificationProblemData LoadData(IDataDescriptor id) {
47      var descriptor = (ResourceClassificationDataDescriptor)id;
48
49      ClassificationProblemData claData = LoadData(GetTempFileForResource(descriptor.ResourceName));
50      claData.Name = descriptor.Name;
51      claData.Description = descriptor.Description;
52
53      return claData;
54    }
55
56    protected virtual string GetResourceName(string fileName) {
57      return Assembly.GetExecutingAssembly().GetManifestResourceNames()
58              .Where(x => Regex.Match(x, @".*\.Data\." + fileName).Success).SingleOrDefault();
59    }
60
61    protected IEnumerable<string> GetZipContents(ZipInputStream zipFile) {
62      ZipEntry entry;
63      while ((entry = zipFile.GetNextEntry()) != null) {
64        yield return entry.Name;
65      }
66    }
67
68    private string GetTempFileForResource(string resourceName) {
69      var instanceArchiveName = GetResourceName(FileName + @"\.zip");
70      using (var instancesZipFile = new ZipFile(GetType().Assembly.GetManifestResourceStream(instanceArchiveName))) {
71        var entry = instancesZipFile.GetEntry(resourceName);
72        string path = Path.GetTempFileName();
73        using (var stream = instancesZipFile.GetInputStream(entry)) {
74          WriteStreamToTempFile(stream, path);
75        }
76        return path;
77      }
78    }
79
80    private void WriteStreamToTempFile(Stream stream, string path) {
81      using (FileStream output = new FileStream(path, FileMode.Create, FileAccess.Write)) {
82        int cnt = 0;
83        byte[] buffer = new byte[32 * 1024];
84        while ((cnt = stream.Read(buffer, 0, buffer.Length)) != 0)
85          output.Write(buffer, 0, cnt);
86      }
87    }
88  }
89}
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