Field availability in structure

[Former Member]

Hi experts. Problem is following:

I have an export parameter es_data in my method with type 'any'. Is there a possibility to check whether this structure contains some field. For example I do need to know whether es_data contains field 'userName' . If it contains I want to fill it. Guess  that it could be done with field-symbols, but dunno how.

Thanks in advance!

[former_member201285]

    DATA: info TYPE dd_x031l_table,
          descr_ref TYPE REF TO cl_abap_typedescr.

  descr_ref = cl_abap_typedescr=>describe_by_data( es_data ).

  info = descr_ref->get_ddic_object( ).  

Table info will contain all fields.

Regards,

Ulrich

[SharathYaralkattimath]

Using field-symbols,

FIELD-SYMBOLS:  <comp>  TYPE any.

DATA   name TYPE string,

name = 'userName'.

ASSIGN COMPONENT name OF STRUCTURE es_data TO <comp>.

IF sy-subrc EQ 0.

     "Field exists.

ENDIF.

Use RTTS classes & methods,

DATA: tab TYPE REF TO cl_abap_structdescr,

comp_tab   TYPE cl_abap_structdescr=>component_table.

tab?= cl_abap_typedescr=>describe_by_name( es_data ).

comp_tab =  tab->get_components( ).

READ TABLE comp_tab WITH KEY name = 'userName' TRANSPORTING NO FIELDS.

IF sy-subrc EQ 0.

     "Field exists.

ENDIF.

[Former Member]

DATA:  lr_structdescr TYPE REF TO cl_abap_structdescr.
DATA:  lt_components TYPE abap_compdescr,
           ls_component like line of lt_components.
*

FIELD-SYMBOLS: <fs_line> TYPE any.

*

ASSIGN es_data TO <fs_line>.
IF sy-subrc EQ 0

     lr_structdescr ?= cl_abap_typedescr=>describe_by_data( <fs_line> ).     

     lt_components = lr_strucdescr->get_components( ). "get field names

     READ TABLE lt_components INTO ls_component WITH KEY name = 'userName'.

     IF sy-subrc EQ 0.

* Do your assignment here

     ENDIF.
ENDIF.

[Former Member]

Thanks guys)