Book Image

Hands-On Design Patterns with Delphi

By : Primož Gabrijelčič
Book Image

Hands-On Design Patterns with Delphi

By: Primož Gabrijelčič

Overview of this book

Design patterns have proven to be the go-to solution for many common programming scenarios. This book focuses on design patterns applied to the Delphi language. The book will provide you with insights into the language and its capabilities of a runtime library. You'll start by exploring a variety of design patterns and understanding them through real-world examples. This will entail a short explanation of the concept of design patterns and the original set of the 'Gang of Four' patterns, which will help you in structuring your designs efficiently. Next, you'll cover the most important 'anti-patterns' (essentially bad software development practices) to aid you in steering clear of problems during programming. You'll then learn about the eight most important patterns for each creational, structural, and behavioral type. After this, you'll be introduced to the concept of 'concurrency' patterns, which are design patterns specifically related to multithreading and parallel computation. These will enable you to develop and improve an interface between items and harmonize shared memories within threads. Toward the concluding chapters, you'll explore design patterns specific to program design and other categories of patterns that do not fall under the 'design' umbrella. By the end of this book, you'll be able to address common design problems encountered while developing applications and feel confident while building scalable projects.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
About Packt


In this chapter, I have explored four more creational patterns.

The first pattern was a factory method. This pattern simplifies the creation of objects that depend on one another. We can implement it by following the classical object-oriented approach or in a modernized way by using interfaces and dependency injection.

From there, we moved to an abstract factory pattern. Abstract factory is a factory for factories. This pattern defines how abstract interfaces should be used to create collections of dependent objects.

The third pattern, prototype, is about making perfect copies of objects. In Delphi, we have to do this manually, and this section mostly explored the different ways of implementing the data-copying mechanism.

The last pattern in this chapter, builder, is closely related to an abstract factory pattern. It is used to split the creation of complex objects into two parts: one issues instructions to the abstract builder, which then generates a concrete representation.

In the next...