Global Abstract Class

Ex:-

Steps :-

1.Abstract Class Creation.

• Go to Transaction Code SE24.

• Enter the class name start's with ZCL_< class name > and click on Create.

• Enter the description.
• Select the instantiation as Abstract.
• Un-check the Final Keyword.
• Click on SAVE.

• Enter the Method name , Level , Visibility and description.

• To assign the parameters , click on method name and click on Parameters .

• Enter the parameter , Type and Associated Type.

• Click on Save and click on Back Button.

To make Method as Abstract Method.

• Select the method and Click on " Detail View ".

• Pop-up will appear.
• Select Abstract .

• Pop-up will appear.
• Click on Continue.

• Click on Change.

• Check the status bar.

• Create a normal method to display data.

• To pass the parameter , place the cursor on method name and click on Parameters.

• Enter the importing parameter.

• Click on Save and click on back button.
• To implement the method , double click on method name.

• Enter the logic.

• Save it and click on Back.
• Save -> Check -> Activate.

• Copy the Class name.
• Click on Back.

2.Inheriting a Class from Abstract Class :-

• Enter the class name start's with ZCL_<class name > and click on Create.

• Pop-up will appear.
• Enter the description and click on Create Inheritance.

• Enter Super class name as Abstract class name and click on SAVE.

• To re-define the method , click on method name and click on Redefine.

• Enter the logic .

• Click on SAVE and click on Back button.
• Save -> Check -> Activate.

• Copy the Class name.

Main Program

• Go to Transaction code SE38.

• Enter the program name which start's with Y or Z< program name > and click on Create.

• Enter the Title.
• Select the Attribute Type as Executable Program and click on Create.

Source Code

DATA : OBJ TYPE REF TO  ZCL_INHERIT_ABSRACT.

DATA : IT_VBAP TYPE TABLE OF VBAP.

PARAMETERS : P_VBELN TYPE VBAP-VBELN.

START-OF-SELECTION.

CREATE OBJECT OBJ.

CALL METHOD OBJ->FETCH_DATA

  EXPORTING

    IM_VBELN =  P_VBELN

  CHANGING

    CH_ITAB  = IT_VBAP

    .

CALL METHOD OBJ->DISPLAY

  EXPORTING

    IM_ITAB = IT_VBAP

    .

• Save -> Check -> Activate.
• Click on Execute ( F8 ).

Input

• Enter the Input.

Output

• Click on Execute.