topic Re: Accessing Data References in Application Development and Automation Discussions

Accessing Data References

Former Member — Tue, 02 Dec 2008 10:34:25 GMT

Hi!

I' ve got a function with a changing-parameter typed as follows:

ch_r_data type ref to data

In my function I' m trying to assign either a string or a integer to this data reference - depending on some logic.

Unfortunatly, it' s not possilbe to directly assign a value to a generic typed data reference with

ch_r_data->* = 123.

ch_r_data->* = 'abc'.

Has anybody got an idea how to tackle that problem?

Regards,

Thomas

Re: Accessing Data References

abdul_hakim — Tue, 02 Dec 2008 10:41:59 GMT

Hi,

Jus check the below logic. This will help you out..

field-symbols <fs> type any.

data dref type ref to data.

data value1 type i value 1234.

get reference of value1 into dref.

assign dref->* to <fs>.

write <fs>.

Cheers,

Hakim

Edited by: Abdul Hakim on Dec 2, 2008 5:42 AM

Re: Accessing Data References

Former Member — Tue, 02 Dec 2008 11:39:58 GMT

Hi, Hakim!

Thanks for answer. To be honest, that' s not exactly what I meant. Let me explain the problem with an example:

types: begin of t_dtype,
              dtype type string,
              dref type ref to data,
           end of t_dtype.

class a definition.
  public section.
    methods: get_ref changing ch_r_data type t_dtype.
endclass.

class a implementation.
  method get_ref.
    if ch_r_data-dtype = 'string'.
      get reference of 'abc' into ch_r_data-dref.
      "  Won' t work cause 'abc' is gone when method is finished
      ch_r_data-dref->* = 'abc'.
      " Compile error - can' t dereference generic type.
      field-symbols: <fs_data> type string.
      " what now?
    elseif ch_r_data-dtype = 'int'. 
      " Same problem
    endif.    
endmethod.

class b definition.
   public section.
     methods: main.
endclass.

class b implementation.
  method main.
    data: lr_a type ref to a,
             ls_dtype type t_dtype,
             l_string type string.
    create object lr_a.
    ls_dtype-dtype = 'string'.
    get reference of l_string into ls_dtype-dref.
    lr_a->get_ref( changing ch_r_data = ls_dtype ).
  endmethod.
endclass.

I hope, the problem is now clearer.

Any ideas?

Regards,

Edited by: Thomas Würcher on Dec 2, 2008 12:40 PM

Edited by: Thomas Würcher on Dec 2, 2008 12:49 PM

Re: Accessing Data References

Former Member — Tue, 02 Dec 2008 18:40:24 GMT

Had to create another fully-typed data reference variable inside the method with

data: lr_str type ref to string

which I assigned the outside variables address via

lr_str = ch_r_data-dref

and then dereferrenced it for receiving the value with

lr_str->* = 'abc'