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Deciphering Object-Oriented Programming with C++ [WARNING: NOT FOR USE IN OTHER MATERIAL/SEE CONTRACT]

You're reading from   Deciphering Object-Oriented Programming with C++ [WARNING: NOT FOR USE IN OTHER MATERIAL/SEE CONTRACT] A practical, in-depth guide to implementing object-oriented design principles to create robust code

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Product type Paperback
Published in Sep 2022
Publisher Packt
ISBN-13 9781804613900
Length 594 pages
Edition 1st Edition
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Dorothy R. Kirk Dorothy R. Kirk
Author Profile Icon Dorothy R. Kirk
Dorothy R. Kirk
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Table of Contents (30) Chapters Close

Preface 1. Part 1: C++ Building Block Essentials
2. Chapter 1: Understanding Basic C++ Assumptions FREE CHAPTER 3. Chapter 2: Adding Language Necessities 4. Chapter 3: Indirect Addressing – Pointers 5. Chapter 4: Indirect Addressing – References 6. Part 2: Implementing Object-Oriented Concepts in C++
7. Chapter 5: Exploring Classes in Detail 8. Chapter 6: Implementing Hierarchies with Single Inheritance 9. Chapter 7: Utilizing Dynamic Binding through Polymorphism 10. Chapter 8: Mastering Abstract Classes 11. Chapter 9: Exploring Multiple Inheritance 12. Chapter 10: Implementing Association, Aggregation, and Composition 13. Part 3: Expanding Your C++ Programming Repertoire
14. Chapter 11: Handling Exceptions 15. Chapter 12: Friends and Operator Overloading 16. Chapter 13: Working with Templates 17. Chapter 14: Understanding STL Basics 18. Chapter 15: Testing Classes and Components 19. Part 4: Design Patterns and Idioms in C++
20. Chapter 16: Using the Observer Pattern 21. Chapter 17: Applying the Factory Pattern 22. Chapter 18: Applying the Adapter Pattern 23. Chapter 19: Using the Singleton Pattern 24. Chapter 20: Removing Implementation Details Using the pImpl Pattern 25. Part 5: Considerations for Safer Programming in C++
26. Chapter 21: Making C++ Safer 27. Assessments 28. Index 29. Other Books You May Enjoy

Understanding the Factory Method pattern

The Factory pattern, or Factory Method pattern, is a creational design pattern that allows the creation of objects without needing to specify the exact (derived) class that will be instantiated. A Factory Method pattern provides an interface for creating an object, yet allows details within the creation method to decide which (derived) class to instantiate.

A Factory Method pattern is also known as a virtual constructor. Much as a virtual destructor has the specific destructor (which is the entry point of the destruction sequence) determined at runtime through dynamic binding, the concept of a virtual constructor is such that the desired object to instantiate is uniformly determined at runtime.

We cannot always anticipate the specific mix of related derived class objects needed in an application. A Factory Method (or virtual constructor) can create, upon request, an instance of one of many related derived class types, based on the input...

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