Details about Class and Method with OOABAP.

OOABAP

Class: Class is one type of user-define data type with Attributes, Methods, Events, and interface for the application.

Ø  Type of Class:

1. Local Class.

2. Global Class.

·         Local Class: It can be define in an ABAP Program and can only use only with in the program.

·         Global Class: It can be define globally it can access all the ABAP program in SAP system BUT it Created T-Code: SE24.

v  How we create class and define a class.

When we create a class there is a two section

1. Definition.

2. Implementation.

ü  How to Define Class and Method.

CLASS <class name> DEFINITION.

…..

END CLASS.

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*   START                                                                                  *

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CLASS CL_TEST DEFINITION.

             PUBLIC SECTION.

                             DATA        : LV_NAME TYPE CHAR30.

                             METHODS: SHOW_NAME.

             PROTECTED SECTION.

                             “No Declarations.

             PRIVATE SECTION.

                            “No Declarations.

END CLASS.

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*   END                                                                                      *

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ü  How to Implementation Class and Method.

CLASS <class name> IMPLEMENTATION.

………

END CLASS.

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*  START                                                                                   *

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CLASS CL_TEST IMPLEMENTATION.

              METHOD SHOW_NAME.

                         WRITE: / ‘This is the SHOW_NAME Method’.

                          WRITE: /5 LV_NAME.

              ENDMETHOS.

END CLASS.

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*    END                                                                                    *                                               

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Structure of Class

 Components of a Class:

1.    Attributes

·        Static Attributes

·        Instance Attributes

2.    Methods

·        Static Methods

·        Instance Methods

3.    Events

4.    Interfaces

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*REPORT USING OO ABAP                            *

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Report: YRAM_OOABAP1

======================================================

 Project:  SAP Object Oriented ABAP

 Description: Displaying the name by using OO ABAP

======================================================

REPORT yram_ooabap1.

CLASS lcl_class DEFINITION.

  PUBLIC SECTION.

          ** Declaration of Instance Variable

    DATA: lv_name TYPE char20 VALUE.

          ** Declaration of Instance Method

    METHODS: show_name.

  PROTECTED SECTION.

         "No Declaratons

  PRIVATE SECTION.

         "No Declaratons

ENDCLASS.

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* Class Implementation                                                               *

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CLASS lcl_class IMPLEMENTATION.

** Implementation of method

     METHOD show_name.

             WRITE: / 'This is the SHOW_NAME method'.

             WRITE: /5 lv_name.  “Public Variable

  ENDMETHOD.

ENDCLASS.

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* START of TREATMENT                                                                 *

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

START-OF-SELECTION.

** Declaration of Object

  DATA: obj1 TYPE REF TO lcl_class.

**Creation of the Object

  CREATE OBJECT obj1.

** Calling the method

  CALL METHOD obj1->show_name.