Web Dynpro ABAP: Assigning of Conversion Exits in ALV

Question

Hi,
We are currently developing a generic data display application using ALV technology in Web Dynpro ABAP. "Generic" means that the structure of the data is created dynamically during runtime (using RTTS) and that even the contained data elements are created dynamically without any relation to DDIC. The generation is based on metadata like field name, data type, length, decimals, conversion exit.
Our problem is that we were not able to find a way to assign the conversion exit of a data element ("column") in Web Dynpro ALV. Without this feature, no output conversions will take place since the data elements have no relation to DDIC. In the "classical" ALV, this could be easily done using method SET_EDIT_MASK of class CL_SALV_COLUMN.
Is there a similar method in WebDynpro ALV or at least an alternative approach to assign a conversion exit to a column or cell?
Thanks for your help in advance.
Best Regards,
Sven

Answer 1

Hello Sven Hader,
As you said you are generatiing the metadata like field name, data type, length, decimals, conversion exit dynamically.
Can you please let me know how you are diong this?
Meanwhile, you can try this approach to assign a Conversion exit to ALV Table column attribute dynamically.
DATA:     lv_data                         TYPE  dd04v,
              lv_mode_ext2int          type   ESEBOOLE. "Conversion mode that you are in
  read the data from the database
    CALL FUNCTION 'DDIF_DTEL_GET'
      EXPORTING
        name                = lv_ddobjname
        state               =   iv_object_state
        langu               =   iv_langu
      IMPORTING
        dd04v_wa         =   lv_data
      EXCEPTIONS
        illegal_input       = 1
        OTHERS           = 2.
    CHECK NOT lv_data-convexit IS INITIAL.
    CONCATENATE 'CONVERSION_EXIT_' lv_data-convexit '_INPUT'
      INTO cl_im_imp_ehs_material_erp=>mv_conversion_exit_input.
    CONCATENATE 'CONVERSION_EXIT_' lv_data-convexit '_OUTPUT'
      INTO cl_im_imp_ehs_material_erp=>mv_conversion_exit_output.
  IF lv_mode_ext2int = 'X'.
    ASSIGN cl_im_imp_ehs_material_erp=>mv_conversion_exit_input
        TO <lv_funcname>.
  ELSE.
    ASSIGN cl_im_imp_ehs_material_erp=>mv_conversion_exit_output
        TO <lv_funcname>.
  ENDIF.
(3) call the conversion exit
  CHECK <lv_funcname> IS ASSIGNED.
  TRY.
      CALL FUNCTION <lv_funcname>
        EXPORTING
          input  = iv_value
        IMPORTING
          output = ev_value.
      IF sy-subrc <> 0.
      ENDIF.
    CATCH cx_sy_dyn_call_illegal_func
          cx_sy_dyn_call_illegal_type
          cx_sy_dyn_call_param_missing
          cx_sy_dyn_call_param_not_found.               "#EC NO_HANDLER
  ENDTRY.
Endif.
I hope it should work.
Thanks,
Bharath.K
Edited by: Bharath Komarapalem on Dec 16, 2008 2:47 PM