工厂设计模式是一种创建型设计模式,它提供了一种封装对象创建过程的方式,使得代码更加灵活和可维护。 本文将介绍工厂设计模式的工作原理以及如何在Python中实现它。我们将使用一个示例场景来演示工厂设计模式的使用,并提供相应的代码示例。最后,我们将通过甘特图和状态图来展示工厂设计模式的流程和状态变化。 工厂设计模式...
Python设计模式——工厂模式(Factory Pattern) ...设计模式——工厂模式(Factory Pattern) 工厂模式就是根据调用者的需求,负责创建需求对象的一个类,可以隐藏类的实例化过程。 举个例子,你需要一把枪,OK,去兵工厂买。枪很抽象,买的时候老板需要知道你需要什么型号的枪,才能生产出来并交给你。你可以选择AK47或者...
ExampleThe Factory Method defines an interface for creating objects, but lets subclasses decide which classes to instantiate. Injection molding presses demonstrate this pattern. Manufacturers of plastic toys process plastic molding powder, and inject the plastic into molds of the desired shapes. The ...
ExampleThe purpose of the Abstract Factory is to provide an interface for creating families of related objects, without specifying concrete classes. This pattern is found in the sheet metal stamping equipment used in the manufacture of Japanese automobiles. The stamping equipment is an Abstract ...
Net设计模式之抽象工厂模式(Abstract Factory Pattern)(2) 四.案例分析(Example) 1、场景 使用抽象工厂+反射+配置文件实现数据访问层程序。结构如下图所示 用反射+抽象工厂+配置文件的数据访问程序。 Assembly.Load("程序集名称").CreateInstance("命名空间.类名称")。比如: IProduct product=(IProduct)Assembly.Load...
When to use Factory Design Pattern? It is used for creating objects to encapsulate the instantiation logic. Client doesn’t know the actual instantiation logic of entity. Problem See the following example of code, where we have created two different classes as Honda and BMW. Those classes are ...
Abstract Factory is a creational design pattern that lets you produce families of related objects without specifying their concrete classes. 抽象工厂是一种创建性设计模式,它允许您生成相关对象的族,而无需指定其具体类。 Problem 问题 Imagine that you’re creating a furniture shop simulator. Your code co...
Python # In yaml_serializer.py import yaml import serializers class YamlSerializer(serializers.JsonSerializer): def to_str(self): return yaml.dump(self._current_object) serializers.factory.register_format('YAML', YamlSerializer) Note: To implement the example, you need to install PyYAML in...
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Let’s take an example of a Video game. We all play on PS4 but most consumers are not aware of how PS4 was made. They just buy the product and start using it. Factory Design pattern is the same idea. It is a part of the Creational Design Pattern. The basic concept of the ...