private static Type GetNatsClientRequestType(int count)
{
lock (_syncLock)
{
if (_requestTypes.TryGetValue(count, out var type))
{
return(type);
}
var typeBuilder = NatsClientAssembly.DefineClassType("NatsClientRequest" + count);
typeBuilder.SetCustomAttribute(new CustomAttributeBuilder(typeof(DataContractAttribute).GetConstructor(Type.EmptyTypes), Array.Empty <object>()));
var types = typeBuilder.DefineGenericParameters(Enumerable.Range(1, count).Select(x => $"TP{x}").ToArray());
var fields = BuildProperties(typeBuilder, types);
var defaultConstructor = typeBuilder.DefineDefaultConstructor(MethodAttributes.Public);
var constructor = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, types);
var il = constructor.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, defaultConstructor);
for (var i = 0; i < count; i++)
{
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldarg, i + 1);
il.Emit(OpCodes.Stfld, fields[i]);
}
il.Emit(OpCodes.Ret);
return(_requestTypes[count] = typeBuilder.CreateType());
}
}
static NatsClientGenerator()
{
if (!typeof(TContract).IsInterface)
{
throw new Exception("TContract must be an interface");
}
var typeBuilder = NatsClientAssembly.DefineClassType($"{typeof(TContract).Name}Client");
typeBuilder.AddInterfaceImplementation(typeof(TContract));
typeBuilder.SetParent(typeof(NatsClientProxy));
CreateConstructor(typeBuilder);
CreateMethods(typeBuilder);
_type = typeBuilder.CreateType();
}