Object-Oriented Programming with ABAP Objects

There's more to ABAP than procedural programming. If you're ready to leap into the world of ABAP Objects-or are already there and just need a refresher-then this is the book you've been looking for. Thanks to explanations of basic concepts and practical examples that show OOP in action, you'll find answers to questions you didn't even know you had.

Highlights include:
- Working with objects
- Encapsulation and implementation hiding
- Object initialization and cleanup
- Inheritance
- Polymorphism
- Component-based design
- Exceptions
- ABAP Unit
- ALV object model
- Object Services
- BOPF

Highlights:

• Working with objects
• Encapsulation and implementation hiding
• Object initialization and cleanup
• Inheritance
• Polymorphism
• Component-based design
• Exceptions
• ABAP Unit
• ALV object model
• Object Services
• BOPF

List of contents

Introduction ... 15

PART I Introduction

1 ... Introduction to Object-Oriented Programming ... 23

1.1 ... The Need for a Better Abstraction ... 23

1.2 ... Classes and Objects ... 26

1.3 ... Establishing Boundaries ... 30

1.4 ... Reuse ... 34

1.5 ... Object Management ... 38

1.6 ... UML Tutorial: Class Diagram Basics ... 38

1.7 ... Summary ... 45

2 ... Getting Started with Objects ... 47

2.1 ... Defining Classes ... 47

2.2 ... Working with Objects ... 59

2.3 ... Building your First Object-Oriented Program ... 78

2.4 ... Working with Global Classes ... 84

2.5 ... Developing Classes Using the ABAP Development Tools in Eclipse ... 97

2.6 ... New Syntax Features in Release 7.40 ... 114

2.7 ... UML Tutorial: Object Diagrams ... 117

2.8 ... Summary ... 119

3 ... Encapsulation and Implementation Hiding ... 121

3.1 ... Lessons Learned from Procedural Programming ... 121

3.2 ... Data Abstraction with Classes ... 131

3.3 ... Defining Component Visibilities ... 133

3.4 ... Designing by Contract ... 139

3.5 ... UML Tutorial: Sequence Diagrams ... 140

3.6 ... Summary ... 142

4 ... Object Initialization and Cleanup ... 143

4.1 ... Understanding the Object Creation Process ... 143

4.2 ... Working with Constructors ... 148

4.3 ... Object-Creational Patterns ... 152

4.4 ... Garbage Collection ... 157

4.5 ... Tuning Performance ... 159

4.6 ... UML Tutorial: State Machine Diagrams ... 161

4.7 ... Summary ... 163

5 ... Inheritance and Composition ... 165

5.1 ... Generalization and Specialization ... 166

5.2 ... Inheriting Components ... 175

5.3 ... The Abstract and Final Keywords ... 183

5.4 ... Inheritance vs. Composition ... 191

5.5 ... Working with ABAP Refactoring Tools ... 194

5.6 ... UML Tutorial: Advanced Class Diagrams ... 198

5.7 ... Summary ... 201

6 ... Polymorphism ... 203

6.1 ... Object Reference Assignments Revisited ... 204

6.2 ... Dynamic Method Call Binding ... 210

6.3 ... Interfaces ... 212

6.4 ... UML Tutorial: Advanced Class Diagrams Part II ... 229

6.5 ... Summary ... 232

7 ... Component-Based Design Concepts ... 233

7.1 ... Understanding the SAP Component Model ... 233

7.2 ... The Package Concept ... 236

7.3 .. Package Design Concepts ... 258

7.4 ... UML Tutorial: Package Diagrams ... 260

7.5 ... Summary ... 262

8 ... Error Handling with Exception Classes ... 263

8.1 ... Lessons Learned from Prior Approaches ... 263

8.2 ... The Class-Based Exception Handling Concept ... 266

8.3 ... Creating Exception Classes ... 268

8.4 ... Dealing with Exceptions ... 275

8.5 ... Raising and Forwarding Exceptions ... 281

8.6 ... UML Tutorial: Activity Diagrams ... 294

8.7 ... Summary ... 297

9 ... Unit Tests with ABAP Unit ... 299

9.1 ... ABAP Unit Overview ... 300

9.2 ... Creating Unit Test Classes ... 301

9.3 ... Assertions in ABAP Unit ... 307

9.4 ... Managing Dependencies ... 310

9.5 ... Case Study: Creating a Unit Test in ABAP Unit ... 313

9.6 ... Executing Unit Tests ... 316

9.7 ... Evaluating Unit Test Results ... 319

9.8 ... Moving Towards Test-Driven Development ... 321

9.9 ... Behavior-Driven Development ... 322

9.10 ... UML Tutorial: Use Case Diagrams ... 323

9.11 ... Summary ... 328

PART II ... Case Studies

10 ... ABAP Object Services ... 331

10.1 ... Introduction ... 331

10.2 ... Working with the Persistence Service ... 335

10.3 ... Querying Persistent Objects with the Query Service ... 357

10.4 ... Modeling Complex Entity Relationships ... 362

10.5 ... Transaction Handling with the Transaction Service ... 369

10.6 ... UML Tutorial: Communication Diagrams ... 375

10.7 ... Summary ... 377

11 ... Business Object Development with the BOPF ... 379

11.1 ... What is the BOPF? ... 379

11.2 ... Anatomy of a Business Object ... 382

11.3 ... Working with the BOPF Client API ... 397

11.4 ... Where to Go From Here ... 408

11.5 ... UML Tutorial: Advanced Sequence Diagrams ... 411

11.6 ... Summary ... 413

12 ... Working with the SAP List Viewer ... 415

12.1 ... What is the SAP List Viewer? ... 415

12.2 ... Introducing the ALV Object Model ... 418

12.3 ... Developing a Reporting Framework on top of ALV ... 421

12.4 ... UML Tutorial: Advanced Activity Diagrams ... 430

12.5 ... Summary ... 432

13 ... Where to Go From Here ... 433

13.1 ... Object-Oriented Analysis and Design ... 433

13.2 ... Design Patterns ... 434

13.3 ... Reading and Writing ABAP Objects Code ... 435

13.4 ... Summary .... 436

... Appendices .... 437

A ... Installing the Eclipse IDE ... 439

A.1 ... Installing the Java SDK ... 439

A.2 ... Installing Eclipse ... 440

A.3 ... Installing the ABAP Development Tools ... 442

A.4 ... Where to Go to Find Help ... 445

B ... Debugging Objects ... 447

B.1 ... Understanding Debugger Types ... 447

B.2 ... Debugging Objects Using the Classic Debugger ... 447

B.3 ... Debugging Objects Using the New Debugger ... 455

C ... Bibliography ... 459

D ... The Authors ... 461

About the author

James Wood is the founder and principal consultant of Bowdark Consulting, Inc., an SAP NetWeaver consulting and training organization. With more than seven years of experience as a software engineer, James specializes in custom development in the areas of ABAP Objects, Java/J2EE, SAP NetWeaver Process Integration, and the SAP NetWeaver Portal.

Before starting Bowdark Consulting, Inc. in 2006, James was an SAP NetWeaver consultant for SAP America, Inc. and IBM Corporation where he was involved in multiple SAP implementations. He holds a master's degree in software engineering from Texas Tech University. To learn more about James and the book, please check out his website at http://www.bowdarkconsulting.com.

Summary

There's more to ABAP than procedural programming. If you're ready to leap into the world of ABAP Objects—or are already there and just need a refresher—then this is the book you've been looking for. Thanks to explanations of basic concepts and practical examples that show OOP in action, you'll find answers to questions you didn't even know you had. Highlights include:- Working with objects- Encapsulation and implementation hiding- Object initialization and cleanup- Inheritance - Polymorphism - Component-based design- Exceptions- ABAP Unit- ALV object model- Object Services- BOPF

Highlights:

Working with objects
Encapsulation and implementation hiding
Object initialization and cleanup
Inheritance
Polymorphism
Component-based design
Exceptions
ABAP Unit
ALV object model
Object Services
BOPF

Product details

• Authors: Joe Rupert, Joseph Rupert, Jame Wood, James Wood
• Publisher: Rheinwerk Verlag
• Languages: English
• Product format: Hardback
• Released: 25.12.2015
• EAN: 9781592299935
• ISBN: 978-1-59229-993-5
• No. of pages: 470
• Dimensions: 175 mm x 229 mm x 29 mm
• Weight: 1025 g
• Series: SAP PRESS; SAP PRESS Englisch; SAP Press; SAP PRESS Englisch
• Subjects: Natural sciences, medicine, IT, technology > IT, data processing > Programming languages; OOP, Programming Top Seller, TechEd2016, BOPF, SAP Business Workflow, Web Dynpro ABAP, ABAP must-reads, ABAP OOPS, sXML, OOP chapters