Book Image

Mastering Delphi Programming: A Complete Reference Guide

By : Primož Gabrijelčič
Book Image

Mastering Delphi Programming: A Complete Reference Guide

By: Primož Gabrijelčič

Overview of this book

Delphi is a cross-platform Integrated Development Environment (IDE) that supports rapid application development for most operating systems, including Microsoft Windows, iOS, and now Linux with RAD Studio 10.2. If you know how to use the features of Delphi, you can easily create scalable applications in no time. This Learning Path begins by explaining how to find performance bottlenecks and apply the correct algorithm to fix them. You'll brush up on tricks, techniques, and best practices to solve common design and architectural challenges. Then, you'll see how to leverage external libraries to write better-performing programs. You'll also learn about the eight most important patterns that'll enable you to develop and improve the interface between items and harmonize shared memories within threads. As you progress, you'll also delve into improving the performance of your code and mastering cross-platform RTL improvements. By the end of this Learning Path, you'll be able to address common design problems and feel confident while building scalable projects. This Learning Path includes content from the following Packt products: Delphi High Performance by Primož Gabrijel?i? Hands-On Design Patterns with Delphi by Primož Gabrijel?i?
Table of Contents (19 chapters)

Abstract factory

The abstract factory pattern is closely related to the factory method pattern. Sometimes, the problem requires the creation of multiple distinct objects that are somehow related. In such a case, we could introduce multiple factory methods, but then we have to manage them separately, which increases the possibility of implementations becoming out of sync. This approach also makes it hard to share common logic and state between those factory methods. A better way is to introduce an abstract factory, which functions as a factory for factories.

If a factory method is a kid with a cookie cutter, an abstract factory is a kitchen chef. Give them a set of cooking tools and they'll make you a great dish. Give them access to a baking set and they'll make you a perfect pie.

We can implement abstract factory in the same object-oriented way that was used in the factory...