topic Dynamic Type creation: structure in Application Development and Automation Discussions

Dynamic Type creation: structure

steven_dierick — Thu, 06 Dec 2007 11:12:13 GMT

Hey,

I made a dynamic table and now I want to loop this table.

But I can't seem to make a structure to use in the loop.

I get the error 'data object has no structure'.

This is what I already have.

data: linetype type ref to cl_abap_structdescr,

tabletype type ref to cl_abap_tabledescr,

lt_comp type cl_abap_structdescr=>component_table,

lr_table type ref to data,

lr_line type ref to data.

field-symbols: <lt_data> type table,

<ls_data> type any.

...first I fill lt_comp ...

linetype = cl_abap_structdescr=>create( lt_comp ).

tabletype = cl_abap_tabledescr=>create( p_line_type = linetype p_table_kind = 'S' ).

create data lr_table type handle tabletype.

assign lr_table->* to <lt_data> casting type handle tabletype.

create data lr_line like line of <lt_data>.

assign lr_line->* to <ls_data> casting type handle linetype.

... filling the table <lt_data> ....

loop at lt_data assigning <ls_data>.

... when I try to access a field of <ls_data>, I get the error '<ls_data> is no structure'.

endloop.

Re: Dynamic Type creation: structure

uwe_schieferstein — Thu, 06 Dec 2007 19:53:42 GMT

Hello Steven

If you are going for dynamic programming then you have to use "the full monty" meaning field-symbols for:

- itab

- structure AND

- fields


FIELD-SYMBOLS:
  <ld_fld>    TYPE any.

  LOOP AT <lt_data> ASSIGNING <ls_data>.
    UNASSIGN <ld_fld>.

    ASSIGN COMPONENT '<name of field  OR sy-index>' OF STRUCTURE <ls_data>
                                                                                TO <ld_fld>.
   IF ( <ld_fld> IS ASSIGNED ).
"   do something...
   ENDIF.
  ENDLOOP.
...

Regards,

Uwe

Re: Dynamic Type creation: structure

steven_dierick — Fri, 07 Dec 2007 09:08:55 GMT

Hey Uwe,

Thanks for your answer. This works for me.

Steven