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Introduction
Although many books have been published on the subject of object-oriented design, this book caters
specifically to programmers familiar primarily with ABAP, a language with an origin in procedural design,
but after years of evolution, now accommodates both the procedural and object-oriented design paradigms.
A significant aspect of this book is its accompaniment by a set of exercise programs, each one of which
reinforces an object-oriented design concept presented in the book.
For Whom This Book Is Applicable
This book is applicable to virtually all experienced ABAP programmers in one way or another. It is
subdivided into three parts, each part applicable to a specific level of familiarity and comfort by the reader
with the content it presents.
The first part of the book is intended for ABAP programmers already skilled with the procedural aspects
of writing code but who either know nothing about object-oriented programming or simply want to become
more comfortable with the object-oriented paradigm. The basic principles of object-oriented programming
and design are covered here.
The second and third parts of the book are intended for ABAP programmers already familiar with the
basic principles of object-oriented programming but not yet familiar or comfortable with design patterns.
The second part of the book presents an introduction to Unified Modeling Language and the third part of the
book introduces many of the various design patterns typically associated with object-oriented design.
Those ABAP programmers already familiar with both the object-oriented basic principles as well as
Unified Modeling Language and design patterns may find this book covers some design patterns that are
altogether new to them or described and illustrated in a context applicable to ABAP programming.
How This Book Should Be Used
ABAP programmers unfamiliar with object-oriented programming should read the book sequentially from
the beginning. Indeed, the book is organized primarily for the benefit of such programmers, with each
subsequent chapter referring to concepts covered in previous chapters.
ABAP programmers already familiar with object-oriented concepts may skip the first part of the book
and start with the second part, to become more familiar with the Unified Modeling Language and design
patterns.
ABAP programmers already familiar with design patterns may find it most helpful simply to use this
book as a reference.
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