topic Re: How to access Instance Attribute in a Class Interface from FM ? in Application Development and Automation Discussions

How to access Instance Attribute in a Class Interface from FM ?

Former Member — Wed, 18 Aug 2010 14:00:51 GMT

Hi Experts

I have the following function module code, that passes the syntax, however in the class interface ABC, I have an attribute IJK that is Instance Attribute (Public). When I modify the code like ABC->IJK but it does not like it, the error is :-

Field "ABC" is unknown. It is neither in one of the specified tables nor defined by a "DATA" statement. "DATA" statement.

Question : How do I declare the Class Interface ABC in my Function Module that will allow me to access the Instance Attribute ?

Thanks in advance.

FUNCTION XYZ.

if not ABC=>EFG is initial.

output = ABC=>EFG.

shift output left deleting LEADING space.

endif.

ENDFUNCTION.

Re: How to access Instance Attribute in a Class Interface from FM ?

Former Member — Thu, 19 Aug 2010 03:22:50 GMT

Do like this :

data : reference typ ref to abc.

create object reference.

output = reference->ijk

Edited by: pr@t on Aug 19, 2010 8:53 AM

Re: How to access Instance Attribute in a Class Interface from FM ?

uwe_schieferstein — Sun, 22 Aug 2010 19:21:35 GMT

Hello

You question only makes sense if

(1) the class / interface is part of the FM's interface (i.e. an IMPORTING - or perhaps CHANGING - parameter)

(2) the class / interface is defined as global variable in the TOP include of the function group

If either of these two options is applicable then the coding may look like this:


" (1) IMPORTING parameter: e.g. IO_INSTANCE TYPE REF TO class / interface name

IF ( io_instance IS BOUND ).
  io_instance->abc = 'New value'.
ENDIF.


" (2) Global variable of function group, e.g. GO_INSTANCE TYPE REF TO class / interface name:
IF ( go_instance IS BOUND ).
  go_instance->abc = 'New value'.
ENDIF.

Obviously, the public attribute ABC must be changeable (i.e. not READ-ONLY).

Regards

Uwe

Re: How to access Instance Attribute in a Class Interface from FM ?

Former Member — Tue, 24 Aug 2010 07:30:43 GMT

Thanks for your responses and helpful hints.

I awarded the points. Before your response I managed to resolve it with following syntax, similar to the one proposed.

DATA dref TYPE REF TO ABC.

DATA: f2 LIKE dref->EFG.

if not ABC->EFG is initial.

output = ABC->EFG.

shift output left deleting LEADING space.

endif.