source: branches/2520_PersistenceReintegration/HeuristicLab.Common/3.3/Content/ContentManager.cs @ 16453

Last change on this file since 16453 was 16453, checked in by jkarder, 11 months ago

#2520: updated year of copyrights

File size: 3.7 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2019 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.Threading;
24
25namespace HeuristicLab.Common {
26  public abstract class ContentManager {
27    private static ContentManager instance;
28
29    public static void Initialize(ContentManager manager) {
30      if (manager == null) throw new ArgumentNullException();
31      if (ContentManager.instance != null) throw new InvalidOperationException("ContentManager has already been initialized.");
32      ContentManager.instance = manager;
33    }
34
35    protected ContentManager() { }
36
37    public static IStorableContent Load(string filename) {
38      if (instance == null) throw new InvalidOperationException("ContentManager is not initialized.");
39      IStorableContent content = instance.LoadContent(filename);
40      content.Filename = filename;
41      return content;
42    }
43    public static void LoadAsync(string filename, Action<IStorableContent, Exception> loadingCompletedCallback) {
44      if (instance == null) throw new InvalidOperationException("ContentManager is not initialized.");
45      var func = new Func<string, IStorableContent>(instance.LoadContent);
46      func.BeginInvoke(filename, delegate (IAsyncResult result) {
47        Exception error = null;
48        IStorableContent content = null;
49        try {
50          content = func.EndInvoke(result);
51          content.Filename = filename;
52        } catch (Exception ex) {
53          error = ex;
54        }
55        loadingCompletedCallback(content, error);
56      }, null);
57    }
58    protected abstract IStorableContent LoadContent(string filename);
59
60    public static void Save(IStorableContent content, string filename, bool compressed, CancellationToken cancellationToken = default(CancellationToken)) {
61      if (instance == null) throw new InvalidOperationException("ContentManager is not initialized.");
62      instance.SaveContent(content, filename, compressed, cancellationToken);
63      content.Filename = filename;
64    }
65    public static void SaveAsync(IStorableContent content, string filename, bool compressed, Action<IStorableContent, Exception> savingCompletedCallback, CancellationToken cancellationToken = default(CancellationToken)) {
66      if (instance == null) throw new InvalidOperationException("ContentManager is not initialized.");
67      var action = new Action<IStorableContent, string, bool, CancellationToken>(instance.SaveContent);
68      action.BeginInvoke(content, filename, compressed, cancellationToken, delegate (IAsyncResult result) {
69        Exception error = null;
70        try {
71          action.EndInvoke(result);
72          content.Filename = filename;
73        } catch (Exception ex) {
74          error = ex;
75        }
76        savingCompletedCallback(content, error);
77      }, null);
78
79    }
80    protected abstract void SaveContent(IStorableContent content, string filename, bool compressed, CancellationToken cancellationToken);
81  }
82}
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