private static object CreateUnavailableImplementation(Type interfaceType, string dynamicTypeName)
{
object unavailableImpl;
// Defines a public sealed class that only implements typeInterface
// and for which all methods throw ServiceNotAvailableException.
TypeBuilder typeBuilderNotAvailable = _moduleBuilder.DefineType(
dynamicTypeName,
TypeAttributes.Class | TypeAttributes.Sealed,
typeof(object),
new Type[] { interfaceType });
MethodInfo mGetTypeFromHandle = typeof(Type).GetMethod("GetTypeFromHandle");
ConstructorInfo cNotAvailableException = typeof(ServiceNotAvailableException).GetConstructor(new[] { typeof(Type) });
foreach (MethodInfo m in ReflectionHelper.GetFlattenMethods(interfaceType))
{
Type[] parameters;
MethodBuilder mB = ProxyGenerator.CreateInterfaceMethodBuilder(typeBuilderNotAvailable, m, out parameters);
ILGenerator g = mB.GetILGenerator();
g.Emit(OpCodes.Ldtoken, interfaceType);
g.EmitCall(OpCodes.Call, mGetTypeFromHandle, null);
g.Emit(OpCodes.Newobj, cNotAvailableException);
g.Emit(OpCodes.Throw);
}
Type unavailableType = typeBuilderNotAvailable.CreateType();
unavailableImpl = Activator.CreateInstance(unavailableType);
return(unavailableImpl);
}
