Object Oriented | Carlos Mendoza Dubon

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This simple example will show you how to define and implement classes, methods and attributes in ABAP.
Public and private visibility is explained as well as the difference between static and instance components.

This simple example will show you how to define and implement classes, methods and attributes in ABAP.
Public and private visibility is explained as well as the difference between static and instance components.

Classes, Attributes & Methods

The concept of classes is the foundation for all object-oriented thinking.
- A class is a set of objects that have the same structure and the same behavior.
We will start with a simple demonstration, let’s create a class for our previous
function group example, we will call it ZCL_VEHICLE.
Our class will have the following components:
- ZCL_VEHICLE: Class Components:
  - Private Components:
    - Speed
    - Private Access, generally:
      - Attributes
      - Data Types
  - Public Components:
    - Increase_speed
    - Decrease_speed
    - Get_speed
    - Public Access, generally:
      - Methods
      - Events

Attributes can be one of three types:

Elementary
Structured
Table Type

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This video is an introduction to the new ways of thinking and the related concepts of OO (Object Oriented) ABAP.

An example of encapsulating data using a function group is presented, and the advantage of using OO ABAP instead of procedural programming is demonstrated.

Introduction

Based on your existing knowledge of procedural programming with ABAP, I will explain the object-oriented approach using a Function Group.
I will illustrate one of the advantages of using object-oriented programming over procedural programming.
Let’s start by encapsulating data - a concept of the object-oriented programming mode – using a function group in ABAP.

Encapsulating Data: Speed

Function Group with functions to control the speed of a car.

FUNCTION-POOL zfg_vehicle.

*speed is a global variable

*used in the function-pool

DATA: speed TYPE i.

FUNCTION zfm_increase_speed.
ADD i_speed TO speed.

ENDFUNCTION.

FUNCTION zfm_decrease_speed.
SUBTRACT i_speed FROM speed.

ENDFUNCTION.

FUNCTION zfm_get_speed.
e_speed = speed.

ENDFUNCTION.

OO (Object Oriented) ABAP – Introduction

Introduction

Encapsulating Data: Speed

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