Principles of Package Design : Creating Reusable Software Components

Apply design principles to your classes, preparing them for reuse. You will use package design principles to create packages that are just right in terms of cohesion and coupling, and are user- and maintainer-friendly at the same time.The first part of this book walks you through the five SOLID principles that will help you improve the design of your classes. The second part introduces you to the best practices of package design, and covers both package cohesion principles and package coupling principles. Cohesion principles show you which classes should be put together in a package, when to split packages, and if a combination of classes may be considered a "package" in the first place. Package coupling principles help you choose the right dependencies and prevent wrong directions in the dependency graph of your packages.**What You'll Learn** * Apply the SOLID principles of class design * Determine if classes belong in the same package * Know whether it is safe for packages to depend on each other **Who This Book Is For**Software developers with a broad range of experience in the field, who are looking for ways to reuse,share, and distribute their code Apply design principles to your classes, preparing them for reuse. You will use package design principles to create packages that are just right in terms of cohesion and coupling, and are user- and maintainer-friendly at the same time. The first part of this book walks you through the five SOLID principles that will help you improve the design of your classes. The second part introduces you to the best practices of package design, and covers both package cohesion principles and package coupling principles. Cohesion principles show you which classes should be put together in a package, when to split packages, and if a combination of classes may be considered a "package" in the first place. Package coupling principles help you choose the right dependencies and prevent wrong directions in the dependency graph of your packages. What You'll Learn Apply the SOLID principles of class design Determine if classes belong in the same package Know whether it is safe for packages to depend on each other Who This Book Is For Software developers with a broad range of experience in the field, who are looking for ways to reuse,share, and distribute their code Apply design principles to your classes, preparing them for reuse. You will use package design principles to create packages that are just right in terms of cohesion and coupling, and are user- and maintainer-friendly at the same time. The first part of this book walks you through the five SOLID principles that will help you improve the design of your classes. The second part introduces you to the best practices of package design, and covers both package cohesion principles and package coupling principles. Cohesion principles show you which classes should be put together in a package, when to split packages, and if a combination of classes may be considered a "package" in the first place. Package coupling principles help you choose the right dependencies and prevent wrong directions in the dependency graph of your packages. What You'll LearnApply the SOLID principles of class designDetermine if classes belong in the same packageKnow whether it is safe for packages to depend on each otherWho This Book Is ForSoftware developers with a broad range of experience in the field, who are looking for ways to reuse, share, and distribute their code Front Matter ....Pages i-xix Front Matter ....Pages 1-2 The Single Responsibility Principle (Matthias Noback)....Pages 3-10 The Open/Closed Principle (Matthias Noback)....Pages 11-30 The Liskov Substitution Principle (Matthias Noback)....Pages 31-53 The Interface Segregation Principle (Matthias Noback)....Pages 55-66 The Dependency Inversion Principle (Matthias Noback)....Pages 67-104 Front Matter ....Pages 105-114 The Release/Reuse Equivalence Principle (Matthias Noback)....Pages 115-144 The Common Reuse Principle (Matthias Noback)....Pages 145-170 The Common Closure Principle (Matthias Noback)....Pages 171-184 The Acyclic Dependencies Principle (Matthias Noback)....Pages 185-216 The Stable Dependencies Principle (Matthias Noback)....Pages 217-235 The Stable Abstractions Principle (Matthias Noback)....Pages 237-249 Conclusion (Matthias Noback)....Pages 251-256 Back Matter ....Pages 257-275