Hi...New to Badi

Question

Hi ,
I am trying to learn about badi.  for this I have just searched the forum and find the link which explained with an example... but while I am doing it.. in implementation after writing the code,  syntax check is ok but while activating it is giving the error as follows.
Error: Class "ZCL_IM_MM_PURORDER" does not contain an interface  "ZIF_EX_BADI_EKKO".          
link which i have followed is http://www.allsaplinks.com/badi.html
Please tell where I am going wrong.
Regards
Ram

Answer 1

Hai Shri ram
Go through the following Steps for BADI Creation and using
Goto Tcode SE18 for BADI Definition Creation.
give definition Name : ZBADI_CUST--> Press F5 button for Creating the Definition.
Give Description for the BADi Definition : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
In the Attributes tab you will find "TYPE" Tab
there you will check the Check Box as "Multiple" because this badi definition is active for multiple BADI Implementations
save & check the Badi Definition.
Click on "Interface" tab
Double Click on the Interface Name that is "ZIF_EX_BADI_CUST"
here the screen is take you to tcode SE24
here you will declare the methods
give method name as "GET_MATERIAL" as INSTANCE Level.
Click on Parameters Button just above your Method"GET_MATERIAL"
and Give Parameters as
P_MATNR IMPORT Type  MATNR press enter
X_MARA CHANGING      MARA  press enter
save check and activate your badi Definition.
Note : you just declare the method in BADI Definition Section you will write the Method Implementation
       in BADI IMPLEMENTATION Section.Because BADI's are pure Abstact class.
Goto Tcode SE19:
      give Implementation name as : ZBADI_CUST_IMPL and press "F5" for Creation
      it asks BADI Definition name as "ZBADI_CUST" just you create .
      and press enter
          and you give the BADI Implementation Description : XXXXXXXXXXXXXXXXXXXX
      save this Implementation
click on the Interface tab and double click on the Implementation Class as "ZCL_IM_BADI_CUST_IMPL".
     then you have the GET_MATERIAL Method . double click on the Method it opens the Code window for that method.
as looks like bellow.
method ZIF_EX_BADI_CUST~GET_METERIAL .
Here you will write the coding part.
if not p_matnr is initial.
  select single * from mara
                  into x_mara
                  where matnr = p_matnr.
endif.
endmethod.
save,check & activate
come back and activate again.
then you need to use this badi in SE38 program.
go through the following Code
REPORT  ZCUST_BADI1_IMPL_CALL.
TABLES : MARA.
*creatingthe BADI interface ref to following class
DATA : OBJ TYPE REF TO ZIF_EX_CUST_BADI1.
PARAMETERS : P_MATNR LIKE MARA-MATNR.
START-OF-SELECTION.
*passing the BADI interface ref var to following class method to get obj of BADI business add in class
CALL METHOD CL_EXITHANDLER=>GET_INSTANCE
EXPORTING
   EXIT_NAME                     =
   NULL_INSTANCE_ACCEPTED        = SEEX_FALSE
IMPORTING
   ACT_IMP_EXISTING              =
  CHANGING
    INSTANCE                      = OBJ
EXCEPTIONS
   NO_REFERENCE                  = 1
   NO_INTERFACE_REFERENCE        = 2
   NO_EXIT_INTERFACE             = 3
   CLASS_NOT_IMPLEMENT_INTERFACE = 4
   SINGLE_EXIT_MULTIPLY_ACTIVE   = 5
   CAST_ERROR                    = 6
   EXIT_NOT_EXISTING             = 7
   DATA_INCONS_IN_EXIT_MANAGEM   = 8
   others                        = 9
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
*calling the implementation class method via business add in class object
CALL METHOD OBJ->GET_MATERIAL
  EXPORTING
    P_MATNR = P_MATNR
  CHANGING
    X_MARA  = MARA.
WRITE :/ MARA-MATNR,MARA-MBRSH,MARA-MTART.
Regards
Sreeni