public static Type GenerateService(Type typeForMethods, Type typeRealization)
{
var interfaceType = InterfaceGenerator.GenerateInterface(typeForMethods);
AssemblyName assemblyName = new AssemblyName("MagicOnionServer.DynamicServices");
string moduleName = String.Format("{0}.dll", assemblyName.Name);
var assembly = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
var module = assembly.DefineDynamicModule(moduleName);
var type = module.DefineType("DynamicMyFirstService",
TypeAttributes.Public,
typeof(ServiceBase <>).MakeGenericType(interfaceType),
new[] { interfaceType });
var fld = type.DefineField("_service", typeRealization, FieldAttributes.Private | FieldAttributes.InitOnly);
var ctor = type.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, Type.EmptyTypes);
var il = ctor.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, type.BaseType.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, Type.EmptyTypes, null));
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Newobj, typeRealization.GetConstructor(Type.EmptyTypes));
il.Emit(OpCodes.Stfld, fld);
il.Emit(OpCodes.Ret);
foreach (var m in interfaceType.GetMethods())
{
if (!m.IsAbstract)
{
continue;
}
var realMet = typeRealization.GetMethod(m.Name);
// TODO Добавить проверку на наличие метода и перегрузки
var met = type.DefineMethod(m.Name,
MethodAttributes.Public | MethodAttributes.ReuseSlot | MethodAttributes.Virtual, //| MethodAttributes.HideBySig,
CallingConventions.HasThis,
m.ReturnType,
m.GetParameters().Select(p => p.ParameterType).ToArray()
);
il = met.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, fld);
int paramCnt = m.GetParameters().Length;
for (int j = 0; j < paramCnt; j++)
{
il.Emit(OpCodes.Ldarg, j + 1);
}
il.Emit(OpCodes.Call, realMet);
Type retType = realMet.ReturnType;
if (!retType.IsGenericType || retType.GetGenericTypeDefinition() != typeof(UnaryResult <>))
{
if (retType == typeof(void))
{
retType = typeof(MessagePack.Nil);
il.Emit(OpCodes.Ldsfld, retType.GetField(nameof(MessagePack.Nil.Default)));
}
retType = typeof(UnaryResult <>).MakeGenericType(retType);
il.Emit(OpCodes.Newobj, retType.GetConstructor(new[] { retType.GenericTypeArguments[0] }));
}
il.Emit(OpCodes.Ret);
}
return(type.CreateTypeInfo().AsType());
}
