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Example: Table of dynamic objects



 
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PostPosted: Fri Sep 21, 2007 4:56 pm    Post subject: Example: Table of dynamic objects Reply with quote

Code:
REPORT s_dynamic_data_objects.

* Data declarations

TYPES: BEGIN OF t_item,
         content TYPE i,
         next TYPE REF TO data,
       END OF t_item.

DATA: dref_start TYPE REF TO data,
      dref_new TYPE REF TO data.

FIELD-SYMBOLS <fs_new> TYPE t_item.

* Create dynamic list

DO 10 TIMES.
  CREATE DATA dref_new TYPE t_item.
  ASSIGN dref_new->* TO <fs_new>.
  <fs_new>-content = sy-index ** 2.
  IF sy-index = 1.
    dref_start = dref_new.
  ENDIF.
  PERFORM append_item USING dref_start
                            dref_new.
ENDDO.

PERFORM show_list_content USING dref_start.

* Subroutines

FORM append_item USING dref_start TYPE REF TO data
                       dref_new TYPE REF TO data.
  FIELD-SYMBOLS <fs_curitem> TYPE t_item.
  DATA dref_cur TYPE REF TO data.
  IF dref_start = dref_new.
    EXIT.
  ENDIF.
  dref_cur = dref_start.
  ASSIGN dref_cur->* TO <fs_curitem>.
  WHILE NOT <fs_curitem>-next IS INITIAL.
    dref_cur = <fs_curitem>-next.
    ASSIGN dref_cur->* TO <fs_curitem>.
  ENDWHILE.
  <fs_curitem>-next = dref_new.
ENDFORM.

*

FORM show_list_content USING dref_start TYPE REF TO data.
  FIELD-SYMBOLS <fs_curitem> TYPE t_item.
  DATA dref_cur TYPE REF TO data.
  dref_cur = dref_start.
  WHILE NOT dref_cur IS INITIAL.
    ASSIGN dref_cur->* TO <fs_curitem>.
    WRITE:/ <fs_curitem>-content.
    dref_cur = <fs_curitem>-next.
  ENDWHILE.
ENDFORM.
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