1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2019 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.Reflection;
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25 | using HeuristicLab.Persistence.Core;
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26 | using HeuristicLab.Tracing;
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27 |
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28 | namespace HeuristicLab.Persistence.Auxiliary {
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29 | internal class TypeLoader {
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30 | #region Mono Compatibility
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31 | private static TypeName cachedMonoRuntimeType;
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32 | private static TypeName cachedWindowsRuntimeType;
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33 | private static TypeName cachedMonoObjectEqualityComparerType;
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34 | private static TypeName cachedWindowsObjectEqualityComparerType;
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35 |
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36 | private static bool MonoInstalled {
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37 | get { return Type.GetType("Mono.Runtime") != null; }
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38 | }
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39 |
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40 | static TypeLoader() {
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41 | // we use Int32 here because we get all the information about Mono's mscorlib and just have to change the class name
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42 | cachedMonoRuntimeType = TypeNameParser.Parse(typeof(System.Int32).AssemblyQualifiedName);
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43 | cachedMonoRuntimeType = new TypeName(cachedMonoRuntimeType, "MonoType");
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44 |
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45 | cachedWindowsRuntimeType = TypeNameParser.Parse(typeof(System.Int32).AssemblyQualifiedName);
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46 | cachedWindowsRuntimeType = new TypeName(cachedWindowsRuntimeType, "RuntimeType");
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47 |
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48 | // we need the information about the Persistence assembly, so we use TypeName here because it is contained in this assembly
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49 | cachedMonoObjectEqualityComparerType = TypeNameParser.Parse(typeof(TypeName).AssemblyQualifiedName);
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50 | cachedMonoObjectEqualityComparerType = new TypeName(cachedMonoObjectEqualityComparerType, "ObjectEqualityComparer", "HeuristicLab.Persistence.Mono");
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51 |
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52 | cachedWindowsObjectEqualityComparerType = TypeNameParser.Parse(typeof(System.Int32).AssemblyQualifiedName);
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53 | cachedWindowsObjectEqualityComparerType = new TypeName(cachedWindowsObjectEqualityComparerType, "ObjectEqualityComparer", "System.Collections.Generic");
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54 | }
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55 | #endregion
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56 |
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57 | public static Type Load(string typeNameString) {
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58 | TypeName typeName = null;
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59 | try {
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60 | typeName = TypeNameParser.Parse(typeNameString);
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61 | }
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62 | catch (Exception) {
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63 | throw new PersistenceException(String.Format(
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64 | "Could not parse type string \"{0}\"",
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65 | typeNameString));
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66 | }
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67 |
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68 | try {
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69 | // try to load type normally
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70 | return LoadInternal(typeName);
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71 | }
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72 | catch (PersistenceException) {
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73 | #region Mono Compatibility
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74 | // if that fails, try to convert to the corresponding Mono or .NET type
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75 | if (MonoInstalled) {
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76 | typeName = GetMonoType(typeName);
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77 | Logger.Info(String.Format(@"Trying to load Mono type ""{0}"" instead of .NET type ""{1}""",
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78 | typeName, typeNameString));
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79 | } else {
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80 | typeName = GetDotNetType(typeName);
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81 | Logger.Info(String.Format(@"Trying to load .NET type ""{0}"" instead of Mono type ""{1}""",
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82 | typeName, typeNameString));
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83 |
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84 | }
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85 | return LoadInternal(typeName);
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86 | #endregion
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87 | }
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88 | }
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89 |
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90 | private static Type LoadInternal(TypeName typeName) {
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91 | Type type;
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92 | try {
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93 | type = Type.GetType(typeName.ToString(true, true), true);
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94 | }
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95 | catch (Exception) {
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96 | Logger.Warn(String.Format(
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97 | "Cannot load type \"{0}\", falling back to partial name", typeName.ToString(true, true)));
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98 | type = LoadWithPartialName(typeName);
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99 | CheckCompatibility(typeName, type);
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100 | }
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101 | return type;
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102 | }
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103 |
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104 | private static Type LoadWithPartialName(TypeName typeName) {
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105 | try {
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106 | #pragma warning disable 0618
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107 | Assembly a = Assembly.LoadWithPartialName(typeName.AssemblyName);
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108 | // the suggested Assembly.Load() method fails to load assemblies outside the GAC
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109 | #pragma warning restore 0618
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110 | return a.GetType(typeName.ToString(false, false), true);
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111 | }
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112 | catch (Exception) {
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113 | throw new PersistenceException(String.Format(
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114 | "Could not load type \"{0}\"",
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115 | typeName.ToString(true, true)));
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116 | }
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117 | }
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118 |
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119 | private static void CheckCompatibility(TypeName typeName, Type type) {
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120 | try {
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121 | TypeName loadedTypeName = TypeNameParser.Parse(type.AssemblyQualifiedName);
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122 | if (!typeName.IsCompatible(loadedTypeName))
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123 | throw new PersistenceException(String.Format(
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124 | "Serialized type is incompatible with available type: serialized: {0}, loaded: {1}",
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125 | typeName.ToString(true, true),
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126 | type.AssemblyQualifiedName));
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127 | if (typeName.IsNewerThan(loadedTypeName))
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128 | throw new PersistenceException(String.Format(
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129 | "Serialized type is newer than available type: serialized: {0}, loaded: {1}",
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130 | typeName.ToString(true, true),
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131 | type.AssemblyQualifiedName));
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132 | }
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133 | catch (PersistenceException) {
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134 | throw;
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135 | }
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136 | catch (Exception e) {
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137 | Logger.Warn(String.Format(
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138 | "Could not perform version check requested type was {0} while loaded type is {1}:",
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139 | typeName.ToString(true, true),
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140 | type.AssemblyQualifiedName),
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141 | e);
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142 | }
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143 | }
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144 |
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145 | #region Mono Compatibility
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146 | /// <summary>
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147 | /// Returns the corresponding type for the Mono runtime
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148 | /// </summary>
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149 | /// <returns>
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150 | /// The remapped typeName, or the original typeName if no mapping was found
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151 | /// </returns>
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152 | private static TypeName GetMonoType(TypeName typeName) {
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153 | // map System.RuntimeType to System.MonoType
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154 | if (typeName.Namespace == "System" && typeName.ClassName == "RuntimeType") {
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155 | return cachedMonoRuntimeType;
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156 | // map System.Collections.Generic.ObjectEqualityComparer to HeuristicLab.Mono.ObjectEqualityComparer
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157 | } else if (typeName.Namespace == "System.Collections.Generic" && typeName.ClassName == "ObjectEqualityComparer") {
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158 | TypeName newTypeName = new TypeName(cachedMonoObjectEqualityComparerType);
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159 | newTypeName.GenericArgs = new List<TypeName>(typeName.GenericArgs);
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160 | return newTypeName;
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161 | }
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162 | return typeName;
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163 | }
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164 |
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165 | /// <summary>
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166 | /// Returns the corresponding type for the .NET runtime
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167 | /// </summary>
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168 | /// <returns>
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169 | /// The remapped typeName, or the original typeName if no mapping was found
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170 | /// </returns>
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171 | private static TypeName GetDotNetType(TypeName typeName) {
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172 | // map System.MonoType to System.RuntimeType
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173 | if (typeName.Namespace == "System" && typeName.ClassName == "MonoType") {
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174 | return cachedWindowsRuntimeType;
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175 | // maps Mono's string comparer to System.Collections.Generic.ObjectEqualityComparer<string>
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176 | } else if (typeName.Namespace == "System.Collections.Generic" && typeName.ClassName == "InternalStringComparer") {
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177 | TypeName newTypeName = new TypeName(cachedWindowsObjectEqualityComparerType);
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178 | var genericArgsList = new List<TypeName>();
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179 | genericArgsList.Add(new TypeName(typeof(String).Namespace, "String"));
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180 | newTypeName.GenericArgs = genericArgsList;
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181 | return newTypeName;
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182 | } else if (typeName.Namespace == "System.Collections.Generic" && typeName.ClassName == "EqualityComparer+DefaultComparer") {
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183 | TypeName newTypeName = new TypeName(cachedWindowsObjectEqualityComparerType);
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184 | newTypeName.GenericArgs = new List<TypeName>(typeName.GenericArgs);
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185 | return newTypeName;
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186 | }
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187 | return typeName;
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188 | }
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189 | #endregion
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190 | }
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191 | } |
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