Laufzeitinformation über interne Tabelle
Zur Laufzeit Informationen über im Report deklarierte Objekte (Strukturen, Tabellen, etc.) zu bekommen ist mithilfe der RTTI-Klassen (RTTI = Run Time Type Information) recht einfach. Man muss nur wissen, dass es sie gibt…
Mit dem folgenden Programm werden die Langtexte der im Datenelement hinterlegten Felddefinitionen einer internen Struktur ermittelt.
Ausgabe
Das Programm erzeugt eine Liste mit allen in der Struktur “WA_TAB” vorhandenen Felder mit der Information, ob das Feld einen Bezug zum Data Dictionary hat und falls ja: den Langtext zum Datenelement.
Info | Feld | Beschreibung des Feldes
Coding
REPORT. *== Types TYPES: BEGIN OF ty_test, langu TYPE sylangu, abcde TYPE syabcde, END OF ty_test. *== data DATA: BEGIN OF wa_tab, kunnr LIKE knvv-kunnr, matnr LIKE mara-matnr, maktx LIKE makt-maktx, kbetr LIKE konp-kbetr, flag TYPE c LENGTH 10, " Ohne DDIC werks TYPE werks_d, " Datenelement test TYPE ty_test, " Struktur!! END OF wa_tab. START-OF-SELECTION. *== explore structure: PERFORM show_struc_info. *&---------------------------------------------------------------------* *& Form struc *&---------------------------------------------------------------------* FORM struc USING value(istruc). DATA cl_type TYPE REF TO cl_abap_typedescr. DATA cl_struc TYPE REF TO cl_abap_structdescr. DATA cl_elem TYPE REF TO cl_abap_elemdescr. FIELD-SYMBOLS <fs_comps> TYPE abap_compdescr. DATA l_type_kind TYPE abap_typekind. DATA l_name TYPE string. FIELD-SYMBOLS <fs_any> TYPE ANY. DATA wa_dfies TYPE dfies. cl_struc ?= cl_abap_datadescr=>describe_by_data( p_data = istruc ). *== check each element of given structure LOOP AT cl_struc->components ASSIGNING <fs_comps>. ASSIGN COMPONENT <fs_comps>-name OF STRUCTURE istruc TO <fs_any>. IF sy-subrc EQ 0. *== Describe field DESCRIBE FIELD <fs_any> TYPE l_type_kind. IF l_type_kind CA 'uv'. *== again a structure... PERFORM struc USING <fs_any>. ELSE. *== Element: get definition cl_elem ?= cl_abap_datadescr=>describe_by_data( p_data = <fs_any> ). *== Name of field l_name = cl_elem->get_relative_name( ). *== if referenced to dictionary IF cl_elem->is_ddic_type( ) = 'X'. TRY. *== get information from dictionary wa_dfies = cl_elem->get_ddic_field( ). WRITE : / 'DDIC:', 12 <fs_comps>-name, wa_dfies-scrtext_l. CATCH cx_root. CLEAR wa_dfies. WRITE : / 'Error DDIC:', 12 <fs_comps>-name, l_name. ENDTRY. ELSE. *== If no dictionary reference: use elements name WRITE : / 'No DDIC:', 12 <fs_comps>-name, l_name. ENDIF. ENDIF. ENDIF. ENDLOOP. ENDFORM. "struc *&---------------------------------------------------------------------* *& Form show_struc_info *&---------------------------------------------------------------------* FORM show_struc_info. DATA l_type_kind TYPE abap_typekind. *== Which kind of data? l_type_kind = cl_abap_datadescr=>get_data_type_kind( p_data = wa_tab ). *== extract structures IF l_type_kind CA 'uv'. PERFORM struc USING wa_tab. ENDIF. ENDFORM. " test_struct
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