topic Re: Field availability in structure in Application Development and Automation Discussions

Field availability in structure

Former Member — Tue, 12 Aug 2014 09:30:54 GMT

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!

Re: Field availability in structure

former_member201285 — Tue, 12 Aug 2014 09:52:45 GMT

    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

Re: Field availability in structure

SharathYaralkattimath — Tue, 12 Aug 2014 09:58:41 GMT

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.

Re: Field availability in structure

Former Member — Tue, 12 Aug 2014 10:05:05 GMT

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.

Re: Field availability in structure

Former Member — Tue, 12 Aug 2014 12:02:25 GMT

Thanks guys)