首先,我们必须令Operation的派生类遵循Liskov's Substitution Principle,才能放心的说,无论我们在工厂中创建出哪种Operation的派生类,都能够利用多态替换其后对Operation的引用。 其次,工厂模式返回抽象类,使调用工厂的高层模块依赖Operation这个抽象类而不是其某个具体的派生类,这满足了Dependency Inversion Principle。 但是...
What:在软件工程中,设计模式(design pattern)是对软件设计中普遍存在(反复出现) 的各种问题,所提出的解决方案。 Why:为了可重用代码,提高代码的可扩展性和可维护性。 SOLID 简称全称概要 S The Single Responsibility Principle、SRP 一个类只负责一个功能领域的响应职责 O The Open-Close Principle、OCP 软件实体对...
SRP:单一职责原则 单一职责原则(TheSingleResponsibilityPrinciple,SRP)应该是SOLID原则中,最容易被理解的一个,但同时也是最容易被误解的一个。很多人会把“将大函数重构成一个个职责单一的小函数”这一重构手法等价为SRP,这是不对的,小函数固然体现了职责单一,但这并不是SRP。 SRP传播最广的定义应该是Uncle Bob给...
SRP:单一职责原则 单一职责原则(TheSingleResponsibilityPrinciple,SRP)应该是SOLID原则中,最容易被理解的一个,但同时也是最容易被误解的一个。很多人会把“将大函数重构成一个个职责单一的小函数”这一重构手法等价为SRP,这是不对的,小函数固然体现了职责单一,但这并不是SRP。 SRP传播最广的定义应该是Uncle Bob给...
DIP(Dependency inversion principle):依赖倒置原则,依赖接口而不是实现(高层不需要知道底层的实现) ISP 首先来看ISP,接口隔离原则,《clean architecture》的作者承认这是一个语言相关的原则 This fact could lead you to conclude that the ISP is a language issue, rather than an architecture issue. ...
S— Single responsibility principle 在程序设计中,单一责任原则指的是每个模块或者类应该只有一个职责。 你可能听过这样一句谚语“做一件事并把它做好”,这指的就是单一责任原则。 在文章《Principles of Object Oriented Design》中,Bob 大叔定义责任为“改变的原因”。并认为有一个且仅有一个原因使得类或模块发...
When referring to the classes Open Close Principle can be ensured by use of Abstract Classes and concrete classes for implementing their behavior. This will enforce having Concrete Classes extending Abstract Classes instead of changing them. Some particular cases of this are Template Pattern and ...
接口隔离原则(The Interface Segregation Principle,ISP)是关于接口设计的一项原则,这里的“接口”并不单指Java或Go上使用interface声明的狭义接口,而是包含了狭义接口、抽象类、具象类等在内的广义接口。它的定义如下: Client should not be forced to depend on methods it does not use. ...
For those who are not aware of this,SOLIDis an acronym for the first 5 principles of object-oriented design: SRP The Single Responsibility Principle: -- a class should have one, and only one, reason to change. OCP The Open Closed Principle: -- you should be able to extend a class's...
understand the core of design patterns object oriented design single responsibility principle open / closed principle Liskov substitution principle the interface segregation principle the dependency inversion principle creational design patterns (singleton pattern, factory pattern, builder pattern and prototype pat...