ABAP Object

Former Member — Thu, 05 Apr 2007 06:58:41 GMT

Hi ,

In which area we can use ABAP Objects , I am working as ABAP consultant , Currently my company asked me to look on ABAP objects and give some info on where i can use ABAP Objects , What will be the advantage of it , Some real time scenarios that i can use ABAP objects ... Like that ...Can anyone help on this ..

Renjith Kumar

Re: ABAP Object

amit_khare — Thu, 05 Apr 2007 07:02:00 GMT

Almost everything in ABAP can be Coded with ABAP objects.

Actually in current scenarios it is more preferred then the conventional ABAP.

Its best utility comes with ALV displays.

Check this thread -

Infact if you serach the forum for ABAP object you will come across many good things to know about it specially from the replies by Rich.

Regards,

Amit

Re: ABAP Object

Former Member — Thu, 05 Apr 2007 07:02:59 GMT

Hi,

Look at the below link, it will solve your problem

http://help.sap.com/saphelp_nw2004s/helpdata/en/ce/b518b6513611d194a50000e8353423/content.htm

Regards

Sudheer

Re: ABAP Object

Former Member — Thu, 05 Apr 2007 07:05:49 GMT

Hi Renjith Kumar,

Check this info.

Object Orientation

A programming technique in which solutions reflect real world objects

What are objects ?

An object is an instantiation of a class. E.g. If “Animal” is a class, A cat

can be an object of that class .

With respect to code, Object refers to a set of services ( methods /

attributes ) and can contain data

What are classes ?

A class defines the properties of an object. A class can be instantiated

as many number of times

Advantages of Object Orientated approach

Easier to understand when the system is complex

Easy to make changes

Encapsulation - Can restrict the visibility of the data ( Restrict the access to the data )

Polymorphism - Identically named methods behave differently in different classes

Inheritance - You can use an existing class to define a new class

Polymorphism and inheritance lead to code reuse

Classes in abap

Classes in ABAP are either local or global

Global classes are declared in class builder (SE24 )

Local classes are declared within programs

Components of a class

Attributes : Internal data fields of class

Attributes can be either instance attributes – specific to each instance of the class ( object ) or static attributes which are common to all instances

Methods :

Subroutines / procedures in a class that define the behavior of the object. Methods can also be instance methods or static methods

Encapsulation in ABAP

Encapsulation is obtained through the restriction in visibility of attributes / methods attained through the definition of Public, Private and Protected section of a class

Public Section

All of the components declared in the public section are accessible to all users of the class, and to the methods of the class and any classes that inherit from it. The public components of the class form the interface between the class and its users.

Protected Section

All of the components declared in the protected section are accessible to all methods of the class and of classes that inherit from it.

Private Section

Components that you declare in the private section are only visible in the methods of the same class.

Inheritance in ABAP

Inheritance allows you to derive a class based on an already existing class.

CLASS <subclass> DEFINITION INHERITING FROM <superclass>.

…..

ENDCLASS.

CLASS <subclass> IMPLEMENTATION.

……

ENDCLASS.

All attributes / methods of super class become the property of the subclass too. Only public and protected attributes / methods are visible in the subclass

Polymorphism in ABAP

When methods with same name perform differently under different

circumstances we call it polymorphism.

Methods redefined in a subclass is an example for Polymorphism

Interfaces

Interfaces are used to define the model of a class.

They also like classes can be either local or global.

Global interfaces are defined through SE24 and local interfaces are defined in program.

Please check this online document (starting page 1291).

http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCABA/BCABA.pdf

Also check this links as well.

http://help.sap.com/saphelp_nw2004s/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm