More problems storing a passed table to a class.

Yesterday I posted a question regarding the need to pass an internal table to a class, have the class 'store' the table so any method in the class could then access the data.
I had loads of help and got this reply which work well
Unofrtuantely I cannot seem to loop through the table to get the data eg in the normal way
table = internal_table.
wa_table like line of table.
loop at table into wa_table.
   write wa_table-field1.
   write wa_table-field2.
   write wa_table-field3.
endloop.
Also I will I think also need to pass this table into salv class, as I understand it is at the moment a pointer to a table?
I am a little lost as to why the TYPE ANY TABLE cannot be used on the DATA command, this would from what I have seen solve so many problems and reduce the amount of code 10 fold. Does anyone think or know if SAP will implement this or realse a patch to update OO?
Sorry for the silly questions, but I have onlly be coding ABAP for a week or so and coming from a python and C((+)) ABAP types are quite limiting..
CLASS lcl_some_class DEFINITION.
PUBLIC SECTION.
    DATA mdo_table_object TYPE REF TO data.
    METHODS: constructor
                IMPORTING it_table TYPE STANDARD TABLE,
              some_method.
ENDCLASS.                    "lcl_some_class DEFINITION
CLASS lcl_some_class IMPLEMENTATION.
METHOD constructor.
    FIELD-SYMBOLS <gt_table> TYPE ANY TABLE.
    CREATE DATA me->mdo_table_object LIKE it_table.
    ASSIGN me->mdo_table_object->* TO <gt_table>.
    <gt_table> = it_table.
ENDMETHOD.                    "constructor
METHOD some_method.
    DATA ldo_line_object TYPE REF TO data.
    DATA lo_struct_descr TYPE REF TO cl_abap_structdescr.
    FIELD-SYMBOLS <lt_table> TYPE ANY TABLE.
    FIELD-SYMBOLS <comp_wa> TYPE abap_compdescr.
    ASSIGN me->mdo_table_object->* TO <lt_table>.
    CREATE DATA ldo_line_object LIKE LINE OF <lt_table>.
    lo_struct_descr ?= cl_abap_typedescr=>describe_by_data_ref( ldo_line_object ).
    LOOP AT lo_struct_descr->components ASSIGNING <comp_wa>.
      WRITE: / <comp_wa>-name, <comp_wa>-type_kind,
               <comp_wa>-length, <comp_wa>-decimals.
    ENDLOOP.
    ULINE.
ENDMETHOD.                    "some_method
ENDCLASS.                    "lcl_some_class IMPLEMENTATION
TYPES: BEGIN OF type_eina,
        infnr TYPE infnr,
        matnr TYPE matnr,
        lifnr TYPE lifnr,
       END OF type_eina.
TYPES: BEGIN OF type_mara,
        matnr TYPE matnr,
        ersda TYPE ersda,
        ernam TYPE ernam,
       END OF type_mara.
DATA gt_eina TYPE STANDARD TABLE OF type_eina.
DATA gt_mara TYPE STANDARD TABLE OF type_mara.
DATA go_object_of_some_class TYPE REF TO lcl_some_class.
START-OF-SELECTION.
SELECT infnr matnr lifnr
    FROM eina
    INTO TABLE gt_eina
    UP TO 10 ROWS.
SELECT matnr ersda ernam
    FROM mara
    INTO TABLE gt_mara
    UP TO 20 ROWS.
CREATE OBJECT go_object_of_some_class
    EXPORTING
      it_table = gt_eina.
go_object_of_some_class->some_method( ).
CREATE OBJECT go_object_of_some_class
    EXPORTING
      it_table = gt_mara.
go_object_of_some_class->some_method( ).
Cheers again for all your help
Ian
PS (please dont get me wrong I am not knocking ABAP, I know with any language there is a learning curve, and I have seen so nice tools that other languages do not provide, and the speed of creating apps is real quick)

Hi Ian,
change implementation of method "some_method" according to the following code:
METHOD some_method.
    DATA ldo_line_object TYPE REF TO data.
    DATA lo_struct_descr TYPE REF TO cl_abap_structdescr.
    FIELD-SYMBOLS <lt_table> TYPE ANY TABLE.
    FIELD-SYMBOLS <ls_line> TYPE ANY.
    FIELD-SYMBOLS <ld_comp> TYPE ANY.
    FIELD-SYMBOLS <comp_wa> TYPE abap_compdescr.
    ASSIGN me->mdo_table_object->* TO <lt_table>.
    CREATE DATA ldo_line_object LIKE LINE OF <lt_table>.
    ASSIGN ldo_line_object->* TO <ls_line>.
    lo_struct_descr ?= cl_abap_typedescr=>describe_by_data_ref( ldo_line_object ).
* Create header
    LOOP AT lo_struct_descr->components ASSIGNING <comp_wa>.
      WRITE: <comp_wa>-name.
    ENDLOOP.
    NEW-LINE.
* value output
    LOOP AT <lt_table> ASSIGNING <ls_line>.
      DO.
        ASSIGN COMPONENT sy-index OF STRUCTURE <ls_line> TO <ld_comp>.
        IF sy-subrc = 0.
          WRITE <ld_comp>.
        ELSE.
          NEW-LINE.
          EXIT.
        ENDIF.
      ENDDO.
    ENDLOOP.
    ULINE.
ENDMETHOD.                    "some_method
( Using markup for code, really helps reading code... )
Kind Regards
REA
Edited by: Ramy El-Arnaouty on Apr 15, 2011 10:55 AM

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Hope I helped,
Shay

Passing internal tables to a class

Hi All,
I have a problem at the moment, I need to pass an internal table to a class
The problem is that depending on user input one of two differnet tables will be passed.
TYPES: BEGIN OF t_destination_structure,
          matnr        TYPE mbew-matnr,
          swerk         TYPE mbew-bwkey,
          sverpr        TYPE mbew-verpr,
          speinh        TYPE mbew-peinh,
          bwkey        TYPE mbew-bwkey,
          verpr          TYPE mbew-verpr,
          peinh          TYPE mbew-peinh,
          lbkum         TYPE mbew-lbkum,
          salk3          TYPE mbew-salk3,
          new_verpr TYPE mbew-verpr,
          new_salk3 TYPE mbew-salk3,
          bwtar           TYPE mbew-bwtar,
          it_colours    TYPE lvc_t_scol,
       END OF t_destination_structure.
TYPES: BEGIN OF t_pur_org_structure,
          matnr         TYPE mbew-matnr,
          bwkey       TYPE mbew-bwkey,
          verpr          TYPE mbew-verpr,
          peinh         TYPE mbew-peinh,
          lbkum         TYPE mbew-lbkum,
          salk3          TYPE mbew-salk3,
          new_verpr TYPE mbew-verpr,
          new_salk3 TYPE mbew-salk3,
          bwtar          TYPE mbew-bwtar,
          it_colours   TYPE lvc_t_scol,
           END OF t_pur_org_structure.
DATA:       i_destination_structure     TYPE TABLE OF t_destination_structure,
                 i_pur_org_structure         TYPE TABLE OF t_pur_org_structure.
PERFORM Output USING i_destination_structure 1.
OR
PERFORM Output USING i_pur_org_structure 2.
" Output for def
FORM Output USING fuw_PassedTable fuw_Output_Switch
" assignment that I want to make o_EventHandle is already created
o_EventHandle->li_destination_structure = fuw_PassedTable.
" Class definition
CLASS lcl_LocalEventHandler DEFINITION.
    PUBLIC SECTION.
        DATA: li_destination_structure TYPE REF TO data, ************************************************************************
              lw_radio_choice TYPE string.
        METHODS: OnUserCommand FOR EVENT added_function OF cl_salv_events IMPORTING e_salv_function.
        " Applies the GLEP from a souce branch to selected branch(es) GELP
         " DATA: iPassedTable TYPE passedtable.
    PROTECTED SECTION.
    PRIVATE SECTION.
        METHODS: apply_change.
        METHODS: simulate_change.
ENDCLASS.
When run this produces the error cannot convert type H to I
All I need is the attribute to be a generic tabe that will become the passed table type, this sort of thing shouldnt be rocket science but I am having real trouble in my TYPE assignment
If anyone can help or maybe have some ideas in how I can do this that would be great
Cheers
Ian

Hi,
You have to create the tables dynamic. You can do this via CREATE DATA.. Also have a look at the RTTI classes.
I have added an example. Pass the itab via importing parameter (TYPE ANY TABLE), create data like the imported table, assign a field-symbol to the created data and, if needed, move the data from the passed itab to the dynamic itab.
REPORT zz_dynamic_itab.
CLASS lcl_sample DEFINITION DEFERRED.
DATA lt_sflight     TYPE TABLE OF sflight.
DATA lt_spfli        TYPE TABLE OF spfli.
DATA lcl_sample TYPE REF TO lcl_sample.
      CLASS lcl_sample DEFINITION
CLASS lcl_sample DEFINITION.
PUBLIC SECTION.
    METHODS
      create_itab_from_data IMPORTING it_table TYPE ANY TABLE.
ENDCLASS.                    "lcl_sample DEFINITION
      CLASS lcl_sample IMPLEMENTATION
CLASS lcl_sample IMPLEMENTATION.
METHOD create_itab_from_data.
    DATA lr_table    TYPE REF TO data.
    DATA lr_wa_table TYPE REF TO data.
    FIELD-SYMBOLS <lt_table> TYPE ANY TABLE.        "Dynamic Table
    FIELD-SYMBOLS <ls_table> TYPE ANY.              "Dynamic WA of Table
Create data object from your table
    CREATE DATA lr_table LIKE it_table.
Create your itab.
    ASSIGN lr_table->* TO <lt_table>.
    <lt_table> = it_table.
Create wa
    CREATE DATA lr_wa_table LIKE LINE OF <lt_table>.
    ASSIGN lr_wa_table->* TO <ls_table>.
ENDMETHOD.                    "create_table_from_data
ENDCLASS.                        "lcl_sample IMPLEMENTATION
START-OF-SELECTION.
Creates local class
CREATE OBJECT lcl_sample.
First table: sflight
SELECT *
    FROM sflight
    INTO TABLE lt_sflight.
Pass to class with method
lcl_sample->create_itab_from_data( lt_sflight ).
Second table: spfli
SELECT *
FROM spfli
INTO TABLE lt_spfli.
Pass to class with same method
lcl_sample->create_itab_from_data( lt_spfli ).
Cheers,
Roelof

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