How to set up your ABAP Objects Classes

[Timo_John]

Hello,

I would like to share my latest thoughts about the set up of Objects in ABAP Objects.

To do good design we will put all the attributes of a class as private.

If we have a let's say standard object with those private attributes we can not do

the following:

li_object->my_method( if_id = li_object2->get_id()  ).

At the current point in time (will be possible in ABAP from NW7.20 I learned) we can not use a method call as parameter for an other call. We have to use a help variable lf_id in this case:

lf_id = li_object2->get_id().   

li_object->my_method( if_id = lf_id ).  

We CAN avoid that temp variable using attributes that are public but read only.

(Do NOT make them public, you will hurt the principal of information hiding (http://en.wikipedia.org/wiki/Information_hiding) )

Using these public but read only attributes the following is enabled:

li_object->my_method( if_id = li_object2->gf_id  ). 

This will save one variable in DATA statements, one assignment command and some little piece of memory on the application server.

Tags:

ABAP-OO, Classes, Attributes,