1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 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.Linq;
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25 | using System.Text;
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26 | using System.Diagnostics;
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27 |
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28 | namespace HeuristicLab.MainForm {
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29 | internal static class TypeExtension {
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30 | internal static bool IsAssignableTo(this Type type, Type other) {
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31 | if (other.IsAssignableFrom(type))
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32 | return true;
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33 |
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34 | if (RecursiveCheckGenericTypes(type, other))
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35 | return true;
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36 |
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37 | IEnumerable<Type> implementedInterfaces = type.GetInterfaces().Where(t => t.IsGenericType);
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38 | foreach (Type implementedInterface in implementedInterfaces) {
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39 | if (implementedInterface.CheckGenericTypes(other))
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40 | return true;
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41 | }
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42 |
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43 | return false;
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44 | }
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45 |
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46 | private static bool RecursiveCheckGenericTypes(Type type, Type other) {
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47 | if (type.CheckGenericTypes(other))
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48 | return true;
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49 |
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50 | if (type.BaseType == null)
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51 | return false;
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52 |
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53 | return RecursiveCheckGenericTypes(type.BaseType, other);
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54 | }
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55 |
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56 | internal static bool CheckGenericTypes(this Type type, Type other) {
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57 | if (!type.IsGenericType || !other.IsGenericType)
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58 | return false;
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59 |
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60 | if (type.GetGenericTypeDefinition() == other.GetGenericTypeDefinition())
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61 | return type.CheckGenericArguments(other);
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62 |
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63 | return false;
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64 | }
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65 |
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66 | private static bool CheckGenericArguments(this Type type, Type other) {
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67 | Type[] typeGenericArguments = type.GetGenericArguments();
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68 | Type[] otherGenericArguments = other.GetGenericArguments();
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69 |
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70 | if (typeGenericArguments.Length != otherGenericArguments.Length)
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71 | return false;
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72 |
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73 | for (int i = 0; i < typeGenericArguments.Length; i++) {
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74 | if (typeGenericArguments[i] != otherGenericArguments[i]
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75 | && !otherGenericArguments[i].IsGenericParameter)
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76 | return false;
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77 | }
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78 | return true;
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79 | }
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80 | }
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81 | }
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