source: trunk/sources/HeuristicLab.MainForm/3.2/TypeExtension.cs @ 2724

Last change on this file since 2724 was 2724, checked in by mkommend, 10 years ago

corrected handling of generic content types (ticket #857)

File size: 2.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 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.Linq;
25using System.Text;
26using System.Diagnostics;
27
28namespace HeuristicLab.MainForm {
29  internal static class TypeExtension {
30    internal static bool IsAssignableTo(this Type type, Type other) {
31      if (other.IsAssignableFrom(type))
32        return true;
33
34      if (recursiveCheckGenericTypes(type, other))
35        return true;
36
37      IEnumerable<Type> implementedInterfaces = type.GetInterfaces().Where(t => t.IsGenericType);
38      foreach (Type implementedInterface in implementedInterfaces) {
39        if (implementedInterface.CheckGenericTypes(other))
40          return true;
41      }
42
43      return false;
44    }
45
46    private static bool recursiveCheckGenericTypes(Type type, Type other) {
47      if (type.CheckGenericTypes(other))
48        return true;
49
50      if (type.BaseType == null)
51        return false;
52
53      return recursiveCheckGenericTypes(type.BaseType, other);
54    }
55
56    internal static bool CheckGenericTypes(this Type type, Type other) {
57      if (!type.IsGenericType || !other.IsGenericType)
58        return false;
59
60      if (type.GetGenericTypeDefinition() == other.GetGenericTypeDefinition())
61        return type.CheckGenericArguments(other);
62
63      return false;
64    }
65
66    private static bool CheckGenericArguments(this Type type, Type other) {
67      Type[] typeGenericArguments = type.GetGenericArguments();
68      Type[] otherGenericArguments = other.GetGenericArguments();
69
70      if (typeGenericArguments.Length != otherGenericArguments.Length)
71        return false;
72
73      for (int i = 0; i < typeGenericArguments.Length; i++) {
74        if (typeGenericArguments[i] != otherGenericArguments[i]
75          && !otherGenericArguments[i].IsGenericParameter)
76          return false;
77      }
78      return true;
79    }
80
81    internal static Type[] ExtractGenericTypeArguments(this Type type, Type other) {
82      Type[] types = new Type[0];
83      return types;
84    }
85  }
86}
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