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Scala Design Patterns

You're reading from   Scala Design Patterns Design modular, clean, and scalable applications by applying proven design patterns in Scala

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Product type Paperback
Published in Apr 2018
Publisher Packt
ISBN-13 9781788471305
Length 396 pages
Edition 2nd Edition
Languages
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Author (1):
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Ivan Nikolov Ivan Nikolov
Author Profile Icon Ivan Nikolov
Ivan Nikolov
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Table of Contents (14) Chapters Close

Preface 1. The Design Patterns Out There and Setting Up Your Environment 2. Traits and Mixin Compositions FREE CHAPTER 3. Unification 4. Abstract and Self Types 5. Aspect-Oriented Programming and Components 6. Creational Design Patterns 7. Structural Design Patterns 8. Behavioral Design Patterns – Part One 9. Behavioral Design Patterns – Part Two 10. Functional Design Patterns – the Deep Theory 11. Applying What We Have Learned 12. Real-Life Applications 13. Other Books You May Enjoy

The abstract factory

The abstract factory is another design pattern from the family of factory patterns. The purpose is the same as all factory design patterns—to encapsulate the object creation logic and hide it from the user. The difference is how it is implemented.

The abstract factory design pattern relies on object composition in contrast to inheritance, which is used by the factory method. Here, we have a separate object, which provides an interface to create instances of the classes we need.

An example class diagram

Let's keep using the preceding SimpleConnection example here. The following diagram shows how the abstract factory is structured:

As we can see from the preceding diagram, now we have a hierarchy...

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