Advanced abap programming abap objects sap press books. Improving the design of existing code shows how refactoring can make objectoriented code simpler and easier to maintain. A book has been written on the subject by martin fowler. But we have to do it manually, it would be too costly and tedious task. Due to the temporary closure of training centers current status here, all planned classroom training courses in the affected countries have been converted to our virtual learning method sap live class until further notice thus the original offer is still fully available in these countries. Concepts like refactoring, unit testing, polymorphism and interfaces are wellknown outside the abap sphere, but. The book helps you to venture the switch to objectoriented programming, and brings your skills up to date. The vagaries of code inside these methods conceal the execution logic and make the method extremely hard to understand and even harder to change. Objectoriented programming with abap objects by james wood. It seems that refactoring is just editing your code or what. Also, additional code means additional effort in refactoring. Abap refactoring class computer programming subroutine. Due to the temporary closure of training centers current status here, all planned classroom training courses in the affected countries have been converted to our virtual learning method sap live class until further notice thus the original offer is still fully available in these countries for more details please check our faq. For those that dont know, instantiations is one of the most highly regarded names in oo circles.
Oo abap dynpro programming abap oo mixed with classic dynpro. Getting comfortable using the objectoriented design. In almost all cases, im opposed to setting aside time for refactoring. Much of refactoring is devoted to correctly composing methods. Abap development experience, good knowledge of abap objects. Ive been in programming since 1985, the first 15 years with pl1 on an ibmmainframe computer followed by abap starting in 2000 when the company i then worked for kodak. Take each record type, database table, and turn it into a dumb class with accessors getset.
Each refactoring step is simpleseemingly too simple to be worth doing. For example, the code refactoring techniques described in this book have not changed, since. Moving components from class to associated class refactoring assistant also helps up when we dont have the class hierarchy but the class association. Of friends in abap classes more details creating table of references to. Oo abap concepts december 23, 2015 siva prasad ooabap leave a comment class a class is a template of objects which can handle more than one characteristics. This picture shows you the refactoring browser in eclipse. May 12, 2009 if you re an abap application developer with basic abap programming skills, this book will teach you how to think about writing abap software from an objectoriented oo point of view, and prepare you to work with many of the exciting abapbased technologies in abap objects release 7. This method of handling large refactorings does actually have. Today refactoring requires considerable design knowhow, but once tools become available, all programmers should be able to improve their code using refactoring techniques. Refactoring is intended to improve the design, structure, andor implementation of the software its nonfunctional attributes, while preserving the functionality of the software. Introduction to object oriented abap, concepts and principles of object oriented abap programming. Objectoriented design with abap presents a bridge from the familiar procedural style of abap to the unfamiliar objectoriented style, taking you by the hand and leading you through the difficulties associated with learning these concepts, covering not only the nuances of using objectoriented principles in abap software design but also revealing the reasons why these concepts have. Testdriven development with abap objects amazon s3. Abap in eclipse tutorials refactoring capabilities youtube.
These techniques may feel foreign at first, but in the. Even before i started work on the refactoring book, john brant and don roberts came up with the smalltalk refactoring browser. Data and functions were kept separate and linked together by means of input and output relations. Build on your expertise to create cloudready applications for sap s4hana and deploy applications to the sap fiori more about the book. Next generation abap development by rich heilman and thomas jung. We will try to keep the discussion away from all the. Sep 12, 2017 this is my summary of the refactoring. If youre ready to leap into the world of objectoriented programming oop and abap objectsor are already there and just need a refresherthen this is the book youve been looking for. Hi folks, as some of you know im struggling with a lot of abap oo stuff and am therefore quite happy that i at least managed to create a global class in a sandbox system doing what its supposed to do, namely performing some checks before ddicobjects get added to a transport. Learn how to achieve it with test driven development for abap programs.
Department of computer science university of illinois at urbanachampaign, 1992 ralph e. Hi, been doing abap development for a while but feel like i have reached a plateau in my learning and ability. Elements of reusable objectoriented software 1994 is a software engineering book describing software design patterns. Code refactoring is a disciplined technique for restructuring an existing body of code, altering its internal structure without changing its external behavior,1 undertaken in order to improve some of the nonfunctional attributes of the software.
They dont seem to look at things like optimising your code for performance, oo, badis, bapis, putting it all together, best practice, refactoring code. This is the book that im proudest of, in that its had a high impact on the world of software development. The book is divided into two parts, with the first two chapters exploring the capabilities. You dont decide to refactor, you refactor because you want to do something else, and refactoring helps you do that other thing. Several development environments now automate many of the refactorings described in the book. Introduction to programming sap applications black cover, 576 pages, published by addisonwesley, june 14, 2002, isbn10. These techniques may feel foreign at first, but in the long run they lead to code that is easier and safer to maintain. Having a hard time wrapping my head around anything abapoo.
When i started writing abap classes in the first place i was not aware that the se80 has a refactoring browser. Since we can create constructor method in each subclass, we can change the signature of this method. Without refactoring you accrue technical debt, forget what portions of code do and create. Refactorings in large software projects martin lippert. Improving the design of existing code is focused on oo programming lots of java examples and agile practices. Since i started using eclipse to develop java code i am a big fan of automatic refactoring tools. Turn the data records into objects, break up the behavior, and move the behavior to the objects. It is not intended to be an standalone substitution of the book so if you really want to learn the concepts here presented, buy and read the book and use this repository as a reference and guide. Dont be afraid to refactor when youve gone down the wrong route. Improving the design of existing code by martin fowler 6,611 ratings, 4. If you re an abap application developer with basic abap programming skills, this book will teach you how to think about writing abap software from an objectoriented oo point of view, and prepare you to work with many of the exciting abapbased technologies in abap objects release 7. First learn about all essential oo concepts, then see examples from daily development work. Today, refactoring requires considerable design knowhow, but once tools become available, all programmers should be able to improve their code using refactoring techniques.
Jan 10, 2016 this is part 2 of the 5 part series on abap oo. Jan 01, 1999 a book has been written on the subject by martin fowler. These books are bit expensive but it will enrich you with the deep concepts and real life scenarios which you can use while working in implementation projects. These objects encapsulate the state and behavior of selfcontained parts of the application. This awesome tool makes refactoring much quicker and more pleasurable. In functional languages like scala, certain patterns are not necesary anymore. In oo programming the only structuring units are classes. As you can see there are a lot refactorings possible. The book was written by erich gamma, richard helm, ralph johnson, and john vlissides, with a foreword by grady booch. In this book, martin fowler shows you where opportunities for refactoring typically can be found, and how to go about reworking a bad design into a good one. Abap objects examples abap development community wiki.
Improving the design of existing code object technology series 1 by fowler, martin, beck, kent, brant, john, opdyke, william, roberts, don isbn. Hi, we consider to switch to abap oo but the team has only theoretical. Learn how to use refactoring capabilities for your source code in abap development tools. This tutorial explains the code refactoring techniques based on example programs written in abap objects. This week we begin a 5 part series based upon a frequent request to look at basic abap object oriented concepts. Sep 20, 2011 class editor refactoring assistant ii continuing exploring the refactoring assistant, well see how we can use the class association in the refactoring assistant. And also there is another book for object oriented abap powered by sap. Objectoriented programming oop is a programming paradigm that uses objects and their interactions to design applications and computer programs. Modern abap abap objects instanzen datenkapselung interfaces abstrakten klassen vererbung exceptions ausnahmeklassen events adt refactoring support objectoriented programming p 48. The book testdriven development with abap objects is an indepth treatment of the techniques. Thanks to explanations of basic concepts and practical examples, youll find answers to questions you didnt even know you had.
If youre ready to leap into the world of objectoriented programming oop and abap objects or are already there and just need a refresher then this is the book youve been looking for. Instead of working with global data, you work with objects, which are instances of classes. Sap ooabap interview questions and answers, best object oriented abap interview questions, sap abap oops, oops abap. Class editor refactoring assistant i abap help blog. Objectoriented programming with abap objects by james. Oct 14, 2005 this picture shows you the refactoring browser in eclipse.
All sap systems supporting object oriented programming. Objectoriented design with abap presents a bridge from. Nov 18, 2016 learn how to use refactoring capabilities for your source code in abap development tools. It is setup as a catalog of refactoring techniques. There best book to learn abap are published by sap press.
Jul 01, 2009 this week we begin a 5 part series based upon a frequent request to look at basic abap object oriented concepts. This site shows you the big picture, how all these subjects intersect, work. Code refactoring is the process of restructuring existing computer codechanging the factoringwithout changing its external behavior. Object oriented abap is taking slow phase in adoption for pure abapersnot working in webdynpro or other object oriented space. Trying to add abap unit tests to a global class but could do. In the past, information systems used to be defined primarily by their functionality. Trying to add abap unit tests to a global class but could. Unfortunately both are not supported by the abap refactoring browser. Classical way to abap oo style of coding sap blogs. In my view refactoring is not an activity you set aside time to do. Moving components from class to associated class refactoring assistant also helps up when we dont have the class.
Refactoring is something you do all the time in little bursts. The objectoriented approach, however, focuses on objects that represent abstract or concrete things of the real world. Objectoriented design with abap presents a bridge from the familiar procedural style of abap to the unfamiliar objectoriented style, taking you by the hand and leading you through the difficulties associated with learning these concepts, covering not only the nuances of using objectoriented principles in abap software design but also revealing the reasons why these concepts have become. With proper training a skilled system designer can take a bad design and rework it into welldesigned, robust code. Friendsin any object oriented programming language, the access to private or protected components both methods and attributes would be prohibited. Improving the design of existing code by martin fowler. A blog founded by lukasz pegiel in 20 to provide code samples and ways of using abap hidden functions. Through simple examples and metaphors this book demystifies the objectoriented programming model. If refactoring code fixes a bug, wasnt what you did, by definition, not refactoring. Object oriented abap from sap technical ganesh reddy b a n g a l o r e. Programming techniques may include features such as encapsulation, modularity, polymorphism, and inheritance. The book testdriven development with abap objects is an indepth treatment of the techniques, patterns but also the strategies for setting up a change and learning program to enable your development teams to move towards truly agile development with the well known benefits of less bugs and more productivity at the same time. Refactoring is a change to the code that has no effect on the codes behavior. Even i was in a situation when one of my clients questioned, why you code in oo as he was not able to understand.
Understanding the concepts of object oriented programming what is object orientation. They become popular after they were collected, in a formalized form, in the gang of four book in 1994. In most cases, excessively long methods are the root of all evil. Everyday low prices and free delivery on eligible orders. It is sometimes easier to fix a bug by refactoring the code its in than by tracking it down. Youve worked with abap, sap fiori, and odatanow see how these technologies and more come together in the abap restful programming model. Creating a method in sap classes using object oriented abap programming. The trouble is that it is a smalltalk tool, and not many people are using smalltalk.
Sep 07, 2017 one of soft book to learn patterns is head first design patterns that is java based but can be applied to abap. Jul 23, 2009 in oo programming the only structuring units are classes. Exception handling, object debugging and unit testing are demystified here, plus, you get advice on enhanced techniques and tools in abap 7. The software of the new book is a trial version of the abap application server 7. Class editor refactoring assistant ii continuing exploring the refactoring assistant, well see how we can use the class association in the refactoring assistant. I want to rewrite this entire report using oo abap and i dont have experience writing abap programs using abap objectsclassesmethods, whether to use instancestatic methods etc. Refactoring has become a fullfledged part of the software development lexicon sadly also leading to misuse. Build on your expertise to create cloudready applications for sap s4hana and deploy. Refactoring legacy code can actually fix bugs sometimes.
Improving the design of existing code addisonwesley object technology series book online at best prices in india on. Potential advantages of refactoring may include improved. Throughout this series we will look at oo terminology, development tools, and design patterns that span a variety of abap release levels. The book abap objects abap programming in sap netweaver grey cover, 950 pages, published by sap press, march 15, 2007, isbn10. Jan 09, 2014 object oriented abap is taking slow phase in adoption for pure abapersnot working in webdynpro or other object oriented space. If you like to learn the hard way design patterns in abap objects from sap press is. The paper explains code refactoring techniques based on code examples written in abap objects languageview this document. Association is a reference of an object to another object. The paper explains code refactoring techniques based on code examples written in abap objects language. Guru makes it easy for you to discover everything you need to know about refactoring, design patterns, solid principles, and other smart programming topics. As mentioned in my recent blog post about the opensap abap unit testing course, and as the title of this post makes clear, i have a hard time wrapping my head around anything abap oo or should i say abap oh, oh.
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