Changeset 8641 for trunk/sources/HeuristicLab.Persistence/3.3/Auxiliary/TypeLoader.cs

Timestamp:

09/13/12 11:49:29 (12 years ago)

Author:

ascheibe

Message:

#1952 (#1937) added Mono support to persistence

File:

• trunk/sources/HeuristicLab.Persistence/3.3/Auxiliary/TypeLoader.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Persistence/3.3/Auxiliary/TypeLoader.cs

@@ -26 +26 @@
 
 namespace HeuristicLab.Persistence.Auxiliary {
+  internal class TypeLoader {
+    public static Type Load(string typeNameString) {
+      try {
+        // try to load type normally
+        return LoadInternal(typeNameString);
+      }
+      catch (PersistenceException) {
+        #region Mono Compatibility
+        // if that fails, try to load Mono type
+        string monoTypeNameString = GetMonoType(typeNameString);
+        Logger.Info(String.Format(@"Trying to load Mono type ""{0}"" instead of type ""{1}""",
+                                  monoTypeNameString, typeNameString));
+        return LoadInternal(monoTypeNameString);
+      }
+        #endregion
+    }
 
-  internal class TypeLoader {
-
-    public static Type Load(string typeNameString) {
+    private static Type LoadInternal(string typeNameString) {
       Type type;
       try {
         type = Type.GetType(typeNameString, true);
+        #region Mono Compatibility
+        // mono: workaround until Mono bug #580 (http://bugzilla.xamarin.com/show_bug.cgi?id=580) is fixed
+        if (type.AssemblyQualifiedName != typeNameString)
+          throw new TypeLoadException(
+            String.Format(
+            @"Could not load requested type ""{0}"", loaded ""{1}"" instead.",
+            typeNameString, type.AssemblyQualifiedName));
+        #endregion
       }
       catch (Exception) {
         Logger.Warn(String.Format(
           "Cannot load type \"{0}\", falling back to partial name", typeNameString));
-        try {
-          TypeName typeName = TypeNameParser.Parse(typeNameString);
-#pragma warning disable 0618
-          Assembly a = Assembly.LoadWithPartialName(typeName.AssemblyName);
-          // the suggested Assembly.Load() method fails to load assemblies outside the GAC
-#pragma warning restore 0618
-          type = a.GetType(typeName.ToString(false, false), true);
-        }
-        catch (Exception) {
-          throw new PersistenceException(String.Format(
-            "Could not load type \"{0}\"",
-            typeNameString));
-        }
-        try {
-          TypeName requestedTypeName = TypeNameParser.Parse(typeNameString);
-          TypeName loadedTypeName = TypeNameParser.Parse(type.AssemblyQualifiedName);
-          if (!requestedTypeName.IsCompatible(loadedTypeName))
-            throw new PersistenceException(String.Format(
-              "Serialized type is incompatible with available type: serialized: {0}, loaded: {1}",
-              typeNameString,
-              type.AssemblyQualifiedName));
-          if (requestedTypeName.IsNewerThan(loadedTypeName))
-            throw new PersistenceException(String.Format(
-              "Serialized type is newer than available type: serialized: {0}, loaded: {1}",
-              typeNameString,
-              type.AssemblyQualifiedName));
-        }
-        catch (PersistenceException) {
-          throw;
-        }
-        catch (Exception e) {
-          Logger.Warn(String.Format(
-            "Could not perform version check requested type was {0} while loaded type is {1}:",
-            typeNameString,
-            type.AssemblyQualifiedName),
-            e);
-        }
+        type = LoadWithPartialName(typeNameString);
+        CheckCompatibility(typeNameString, type);
       }
       return type;
     }
+
+    private static Type LoadWithPartialName(string typeNameString) {
+      try {
+        TypeName typeName = TypeNameParser.Parse(typeNameString);
+#pragma warning disable 0618
+        Assembly a = Assembly.LoadWithPartialName(typeName.AssemblyName);
+        // the suggested Assembly.Load() method fails to load assemblies outside the GAC
+#pragma warning restore 0618
+        return a.GetType(typeName.ToString(false, false), true);
+      }
+      catch (Exception) {
+        throw new PersistenceException(String.Format(
+          "Could not load type \"{0}\"",
+          typeNameString));
+      }
+    }
+
+    private static void CheckCompatibility(string typeNameString, Type type) {
+      try {
+        TypeName requestedTypeName = TypeNameParser.Parse(typeNameString);
+        TypeName loadedTypeName = TypeNameParser.Parse(type.AssemblyQualifiedName);
+        if (!requestedTypeName.IsCompatible(loadedTypeName))
+          throw new PersistenceException(String.Format(
+            "Serialized type is incompatible with available type: serialized: {0}, loaded: {1}",
+            typeNameString,
+            type.AssemblyQualifiedName));
+        if (requestedTypeName.IsNewerThan(loadedTypeName))
+          throw new PersistenceException(String.Format(
+            "Serialized type is newer than available type: serialized: {0}, loaded: {1}",
+            typeNameString,
+            type.AssemblyQualifiedName));
+      }
+      catch (PersistenceException) {
+        throw;
+      }
+      catch (Exception e) {
+        Logger.Warn(String.Format(
+          "Could not perform version check requested type was {0} while loaded type is {1}:",
+          typeNameString,
+          type.AssemblyQualifiedName),
+                    e);
+      }
+    }
+
+    #region Mono Compatibility
+    /// <summary>
+    /// Returns the corresponding type for the Mono runtime
+    /// </summary>
+    /// <returns>
+    /// The remapped typeNameString, or the original string if no mapping was found
+    /// </returns>
+    private static string GetMonoType(string typeNameString) {
+      TypeName typeName = TypeNameParser.Parse(typeNameString);
+
+      // map System.RuntimeType to System.MonoType
+      if (typeName.Namespace == "System" && typeName.ClassName == "RuntimeType") {
+        // we use Int32 here because we get all the information about Mono's mscorlib and just have to change the class name
+        typeName = TypeNameParser.Parse(typeof(System.Int32).AssemblyQualifiedName);
+        typeName.ClassName = "MonoType";
+      } else if (typeName.Namespace == "System.Collections.Generic" && typeName.ClassName == "ObjectEqualityComparer") {
+        // map System.Collections.Generic.ObjectEqualityComparer to HeuristicLab.Mono.ObjectEqualityComparer       
+        // we need the information about the Persistence assembly, so we use TypeName here because it is contained in this assembly
+        TypeName oecInfo = TypeNameParser.Parse(typeof(TypeName).AssemblyQualifiedName);
+        typeName.Namespace = "HeuristicLab.Persistence.Mono";
+        typeName.AssemblyName = oecInfo.AssemblyName;
+        typeName.AssemblyAttribues.Clear();
+        typeName.AssemblyAttribues["Version"] = oecInfo.AssemblyAttribues["Version"];
+        typeName.AssemblyAttribues["Culture"] = oecInfo.AssemblyAttribues["Culture"];
+        typeName.AssemblyAttribues["PublicKeyToken"] = oecInfo.AssemblyAttribues["PublicKeyToken"];
+      }
+
+      return typeName.ToString(true, true);
+    }
+    #endregion
   }
 }