Factory Method makes a design more customizable and only a little more complicated. Other design patterns require new classes, whereas Factory Method only requires a new operation.People often use Factory Method
Factory method pattern is a creational design pattern that provides an interface for creating objects but allows subclasses to decide which class to instantiate. By using this pattern, you can encapsulate object creation logic in a separate method of a subclass. This can be useful in situations wh...
The Factory method works just the same way: it defines an interface for creating an object, but leaves the choice of its type to the subclasses, creation being deferred at run-time. A simple real life example of the Factory Method is the hotel. When staying in a hotel you first have to...
;//Concrete FactoryclassResume:publicDocument{public:Resume(){CreatePages();}voidCreatePages(void){AddPages(newSkillsPage());AddPages(newEducationPage());AddPages(newExperiencePage());}};//Concrete FactoryclassReport:publicDocument{public:Report(){CreatePages();}voidCreatePages(void){AddPages(new...
定义一个用于创建对象的接口,让子类决定实例化哪一个类,工厂方法使一个类的实例化延迟到其子类。 2. 别名(Virtual Constructor) 3. 结构 4. 工厂方法模式C#实现 interface Product { public void productMethod(); } class ConcreteProduct : Product { ...
这样的做法,则引入Factory Method模式,无异于画蛇添足了。 Reference [1]http://www.dofactory.com/Patterns/Patterns.aspx 最简单明了地说明了factory method的基本知识 [2]http://home.earthlink.net/~huston2/dp/factoryMethod.html 有很多有用的讨论和经验规则,与其他design pattern的关系和比较 ...
In factory method design pattern mainly three classes/interfaces are involved, first, the factory class that creates an object from a given class hierarchy, second, an interface which is implemented by the concrete classes; objects of those classes will be created by factory class depending upon ...
Simple Factory Pattern (简单工厂模式)、Factory Method Pattern (工厂方法模式),在实作的代码中,有时很难明确去界定此二者。Simple Factory 的特性,如前所述,在于将创建实例 (new instance) 的工作,集中由特定的一个「工厂类」来处理,避免写在各个类中,以方便日后添加新功能,和修改既有的功能。
A factory method can be defined as a method in a class that: (1)Selects an appropriate class from a class hierarchy based on the application context and other influencing factors (2)Instantiates the selected class and returns it as an instance of the parent class type ...
The Factory method lets a class defer instantiation it uses to subclasses. 定义一个用于创建对象的接口,让子类决定实例化哪个类 使用场景 最重要的知识点,这是最重要的知识点,这是最重要的知识点! 首先当然是在你需要new一个类的对象的时候,此时各种状况出现啦: 你不想直接new这个类的对象,怕以后这个类改变...