Introspection/reflection of a class or function module

[Former Member]

Dear all,

Is there a way of performing introspection on classes or function modules in ABAP? For example, I would need a piece of code that gets the attributes and their types of a class that was defined in the class builder.

Thanks,

Philon

[RichHeilman]

Sure, check this out.

REPORT zrich_0003
       LINE-SIZE 200.


DATA: l_dref  TYPE REF TO cl_abap_typedescr.
DATA: l_clref  TYPE REF TO cl_abap_classdescr.
DATA: x_attributes TYPE abap_attrdescr.

CONSTANTS: query_class TYPE seoclsname
                    VALUE 'CL_GUI_ALV_GRID'.

* check if query_class exists in the current system
CALL METHOD cl_abap_classdescr=>describe_by_name
  EXPORTING
    p_name         = query_class
  RECEIVING
    p_descr_ref    = l_dref
  EXCEPTIONS
    type_not_found = 1
    OTHERS         = 2.
IF sy-subrc <> 0.
  EXIT.
ENDIF.

l_clref ?= l_dref.

LOOP AT l_clref->attributes INTO x_attributes.

  WRITE:/ x_attributes-name,
           x_attributes-type_kind,
           x_attributes-length,
           x_attributes-visibility.

ENDLOOP.

Regards,

RIch Heilman