topic Re: OOPs ABAP question (2) in Application Development and Automation Discussions

OOPs ABAP question (2)

Former Member — Thu, 20 Nov 2014 18:34:20 GMT

Hi all.

In this simple code example. I would like to know why this line of code generates an error. CL_SALV_TABLE->DISPLAY( ).

************************************************

DATA : IT_MARA TYPE TABLE OF MARA.

DATA : LR_ALV TYPE REF TO CL_SALV_TABLE.

SELECT * FROM MARA INTO TABLE IT_MARA UP TO 50 ROWS.

CALL METHOD CL_SALV_TABLE=>FACTORY

IMPORTING

R_SALV_TABLE = LR_ALV

CHANGING

T_TABLE = IT_MARA.

**** LR_ALV->DISPLAY( ). "correct

CL_SALV_TABLE->DISPLAY( ). "error

********************************

Q : Isn't the last statement similar to this one : CALL METHOD CL_SALV_TABLE->DISPLAY( )

which is similar to CALL METHOD CL_SALV_TABLE=>FACTORY ?

FACTORY & DISPALY are both methods of the class CL_SALV_TABLE, except that DISPLAY has no import or export parameters. why calling it, is causing an issue ?

Thank you.

Re: OOPs ABAP question (2)

JK — Thu, 20 Nov 2014 20:34:43 GMT

hi sami

the difference is:

CL_SALV_TABLE=>FACTORY is a STATIC Method, where

CL_SALV_TABLE->DISPLAY is a INSTANCE Method, so you cannot Access it over the Classname but you can use a REF TO variable (LR_ALV)

Re: OOPs ABAP question (2)

rosenberg_eitan — Thu, 20 Nov 2014 20:39:02 GMT

Hi,

You are missing basic OO knowledge.

See here http://help.sap.com/abapdocu_740/en/abenabap_objects_oview.htm

Regards.

Re: OOPs ABAP question (2)

thokane — Fri, 21 Nov 2014 04:15:57 GMT

Hi,

FACTORY is static method.

DISPLAY is instance method.

check the syntax for method call

http://help.sap.com/saphelp_nw70/helpdata/en/08/d27c03b81011d194f60000e8353423/content.htm