Object-Oriented Programming with ABAP Objects
Description
ABAPers, get on the cutting edge of object-oriented programming for ABAP! Start by mastering the ABAP Objects syntax and then walk through object encapsulation, initialization, inheritance, and polymorphism. Dive into case studies that demonstrate object-oriented programming in real-world scenarios, from consuming services with SAP BTP ABAP environment to modeling behavior with the ABAP RESTful application programming model. Get expert tips, downloadable code examples, and best practices!
In this book, you'll learn about:
a.Working with ABAP Objects
Explore the benefits of object-oriented programming over classic procedural code. Get ABAP Class Builder and ABAP Development Tools up and running, and then learn the ABAP Objects syntax to build your first object-oriented program.
b.Basic to Advanced Object-Oriented Programming
Create flexible and reusable code with ABAP Objects. Combine data and behavior through encapsulation, initialize and clean up objects, implement inheritance and polymorphism techniques, and more.
c.Modern Development Scenarios
Apply your skills with real-world case studies! Work with SAP Business Technology Platform, the ABAP RESTful application programming model, and the Business Object Processing Framework to tackle today's programming challenges.
Highlights include:
1)Encapsulation
2)Instantiation
3)Inheritance
4)Polymorphism
5)Component-based design
6)Error handling
7)Unit testing
8)ABAP Class Builder
9)ABAP Development Tools
10)ABAP RESTful application programming model
11)SAP BTP, ABAP environment
Business Object Processing Framework (BOPF)
More details
Persons
ISNI:
Content
... Preface ... 17
... Target Group and Prerequisites ... 17
... Structure of the Book ... 17
... Conventions ... 19
... Source Code and Examples ... 20
... Acknowledgments ... 20
1 ... Introduction to Object-Oriented Programming ... 23
1.1 ... The Need for a Better Abstraction ... 23
1.2 ... Classes and Objects ... 25
1.3 ... Establishing Boundaries ... 29
1.4 ... Reuse ... 31
1.5 ... Object Management ... 34
1.6 ... UML Tutorial: Class Diagram Basics ... 35
1.7 ... Summary ... 40
2 ... Working with Objects ... 41
2.1 ... Defining Classes ... 41
2.2 ... Working with Objects ... 51
2.3 ... Building Your First Object-Oriented Program ... 70
2.4 ... Working with Global Classes ... 76
2.5 ... Developing Classes Using ABAP Development Tools ... 88
2.6 ... Working with Constructor Expressions ... 101
2.7 ... UML Tutorial: Object Diagrams ... 104
2.8 ... Summary ... 106
3 ... Encapsulation and Implementation Hiding ... 107
3.1 ... Lessons Learned from Procedural Programming ... 107
3.2 ... Data Abstraction with Classes ... 116
3.3 ... Defining Component Visibilities ... 117
3.4 ... Hiding the Implementation ... 123
3.5 ... Designing by Contract ... 124
3.6 ... UML Tutorial: Sequence Diagrams ... 125
3.7 ... Summary ... 126
4 ... Object Initialization and Cleanup ... 129
4.1 ... Understanding the Object Creation Process ... 129
4.2 ... Working with Constructors ... 133
4.3 ... Taking Control of the Instantiation Process ... 137
4.4 ... Garbage Collection ... 143
4.5 ... Tuning Performance ... 144
4.6 ... UML Tutorial: State Machine Diagrams ... 146
4.7 ... Summary ... 147
5 ... Inheritance and Composition ... 149
5.1 ... Generalization and Specialization ... 149
5.2 ... Inheriting Components ... 159
5.3 ... The Abstract and Final Keywords ... 166
5.4 ... Inheritance Versus Composition ... 173
5.5 ... Working with ABAP Refactoring Tools ... 176
5.6 ... UML Tutorial: Advanced Class Diagrams, Part I ... 179
5.7 ... Summary ... 182
6 ... Polymorphism ... 183
6.1 ... Object Reference Assignments Revisited ... 183
6.2 ... Dynamic Method Call Binding ... 189
6.3 ... Interfaces ... 191
6.4 ... UML Tutorial: Advanced Class Diagrams, Part II ... 207
6.5 ... Summary ... 209
7 ... Component-Based Design Concepts ... 211
7.1 ... Understanding SAP's Component Model ... 211
7.2 ... The Package Concept ... 214
7.3 ... Package Design Concepts ... 233
7.4 ... UML Tutorial: Package Diagrams ... 235
7.5 ... Summary ... 237
8 ... Error Handling with Exception Classes ... 239
8.1 ... Lessons Learned from Prior Approaches ... 239
8.2 ... The Class-Based Exception Handling Concept ... 241
8.3 ... Creating Exception Classes ... 243
8.4 ... Dealing with Exceptions ... 250
8.5 ... Raising and Forwarding Exceptions ... 255
8.6 ... UML Tutorial: Activity Diagrams ... 267
8.7 ... Summary ... 269
9 ... Unit Tests with ABAP Unit ... 271
9.1 ... ABAP Unit Overview ... 271
9.2 ... Creating Unit Test Classes ... 274
9.3 ... Assertions in ABAP Unit ... 280
9.4 ... Managing Dependencies ... 283
9.5 ... Case Study: Creating a Unit Test in ABAP Unit ... 288
9.6 ... Executing Unit Tests ... 291
9.7 ... Evaluating Unit Test Results ... 294
9.8 ... Measuring Code Coverage ... 294
9.9 ... Moving Toward Test-Driven Development ... 296
9.10 ... Behavior-Driven Development ... 296
9.11 ... UML Tutorial: Use Case Diagrams ... 297
9.12 ... Summary ... 301
10 ... Business Object Development with BOPF ... 303
10.1 ... What Is BOPF? ... 303
10.2 ... Anatomy of a Business Object ... 305
10.3 ... Working with the BOPF Client API ... 319
10.4 ... Where to Go from Here ... 330
10.5 ... UML Tutorial: Advanced Sequence Diagrams ... 331
10.6 ... Summary ... 334
11 ... ABAP RESTful Application Programming Model ... 335
11.1 ... Introduction ... 335
11.2 ... CDS and SAP Gateway Service Bindings ... 347
11.3 ... Modeling Behavior Using Object-Oriented Techniques ... 350
11.4 ... Summary ... 370
12 ... ABAP Cloud ... 371
12.1 ... Introduction to SAP Business Technology Platform ... 372
12.2 ... ABAP Environment Overview ... 377
12.3 ... Setting Up Your Cloud Development Environment ... 386
12.4 ... Case Study: Implementing ABAP RESTful Application Programming Model Elements via ABAP Cloud ... 395
12.5 ... Summary ... 397
13 ... Best Practices and Design Patterns ... 399
13.1 ... Object-Oriented Analysis and Design ... 399
13.2 ... Creational Patterns ... 401
13.3 ... Structural Patterns ... 408
13.4 ... Behavioral Patterns ... 419
13.5 ... Summary ... 425
A ... Installing the Eclipse IDE ... 427
A.1 ... Installing the Java SDK ... 427
A.2 ... Installing Eclipse ... 428
A.3 ... Installing the ABAP Development Tools ... 430
A.4 ... Where to Go to Find Help ... 432
B ... The Authors ... 433
... Index ... 435