Alternative to SYSTEM-CALL OBJMGR CLONE me TO result

[ennowulff]

Hey there!

I use the interface IF_OS_CLONE and this system call to clone object references:

"Returning VALUE(result) TYPE REF TO object
SYSTEM-CALL OBJMGR CLONE me TO result. 

Code inspector tells me to use a kernel method instead:

If this is true, what could the kernel method be?

thanks

Enno

[Sandra_Rossi]

What is it for? What is the exact use case? The only official way to clone I know is IF_SERIALIZABLE_OBJECT, i.e. the class must allow it, you shouldn't be allowed otherwise.

[ennowulff]

Hey sandra.rossi The use case is that I have a data object and I clone it to compare data after editing the original object.

What do you mean by IF_SERIALIZABLE_OBJECT? what is the procedure? serialize original object, create a new object and deserialize? like this:

CLASS test DEFINITION.
  PUBLIC SECTION.
    INTERFACES if_serializable_object.
    DATA one TYPE string.
    DATA two TYPE string.
ENDCLASS.

START-OF-SELECTION.

data(obj) = new test( ).

obj->one = 'AAAA'.
obj->two = 'BBBBB'.

CALL TRANSFORMATION id
     SOURCE model = obj
     RESULT XML data(ser).

data(new) = new test( ).

CALL TRANSFORMATION id
     SOURCE XML ser
     RESULT model = new.

how do you know this is the "official" way?

[Sandra_Rossi]

IF_SERIALIZABLE_OBJECT is in the ABAP documentation, so it's official.

Of course, it's stupid to use it just to know if the object has been changed.

If you have a Z class, you may handle the changes the hard way.

If I'm not wrong, persistence classes have an event CHANGED, but you need to rewrite your Z class.

I don't know anything else...

[ennowulff]

sandra.rossi of course the serializable interface is officially documented. but not for the official purpose of cloning objects.

I didn't say I use the copied reference to see _if_ something has changed, but rather to identify the real changes (-> change documents). So I wouldn't call this stupid.

Nevertheless your hint using serialization is a good one. I'll keep in mind for next use of cloning objects.

Thanks!