The bridging mode of design pattern I know

bridging mode design pattern know


Introduction


What we're going to talk about next is Java One of the best design patterns : Bridging mode

Let's start with one question , Introducing bridge mode

Now we can implement operation programming for different brands of different types of mobile phones

such as : Turn it on 、 To turn it off 、 surf the internet , Call, etc

According to the traditional model , Let's start with different types of mobile phones , There are others under each type

image.png

Class diagram corresponding to traditional methods , Let's see , How about

image.png

Traditional solutions to mobile phone operation problems


Scalability issues ( Class blast ), If we Add more mobile phone styles ( Rotary ), We need to add all kinds of mobile phones

Also if we add a mobile phone brand , Also need to add... Under each mobile phone style category .

Violates the single responsibility principle , When we add cell phone styles , Add all brands of mobile phones at the same time , This increases the cost of code maintenance .

Solution - Use bridge mode

image.png

One 、 What is bridging mode

Bridging mode (Bridge Pattern ) Refer to : Put implementation and abstraction in two different class levels , So that the two levels can be changed independently .

Bridging mode It's a structural design pattern

Bridge Pattern Class based minimum design principles , By using encapsulation 、 Behaviors such as aggregation and inheritance let different classes take on different responsibilities .

Its main feature is Abstract (Abstraction) And behavior realization (Implementation) Separate from , So that we can maintain the independence of each part and cope with their function expansion

Analysis of principle class diagram of bridge mode

image.png

Client class : The caller of the bridge mode

abstract class (Abstraction) : Maintained Implementor / That is, its implementation class ConcreteImplementorA.

The two are converging ,Abstraction Act as a bridge class

RefinedAbstraction : yes Abstraction A subclass of an abstract class

Implementor : Behavior implementation class interface

ConcreteImplementorA /B : Concrete implementation class of behavior

from UML chart : The abstract classes and interfaces here are aggregate relationships , In fact, the relationship between calling and being called

Two 、 Bridge mode solves mobile phone operation problems

Use bridge mode to improve the traditional way , Let the program have good expansibility , Use the program to maintain

Use the class diagram corresponding to the bridge pattern

image.png

According to our thinking , Create the interface of the brand first

// Interface
interface Brand {
void open();// Turn it on
void close();// To turn it off
void call();// Make a phone call
}

If we have Xiaomi brand at this time , Just inherit the implementation

class Vivo implements Brand {
@Override
public void open() {
System.out.println(" Vivo Turn on the phone ");
}
@Override
public void close() {
System.out.println(" Vivo Mobile phone shutdown ");
}
@Override
public void call() {
System.out.println(" Vivo Cell phone calls ");
}
}

Next, we create an abstract class of mobile phones , Combination brands

abstract class Phone {
// Combination brands
private Brand brand;
// Constructors
public Phone(Brand brand) {
super();
this.brand = brand;
}
protected void open() {
brand.open();
}
protected void close() {
brand.close();
}
protected void call() {
brand.call();
}
}

At the same time, we create a mobile phone style class , And implement mobile abstract class

class UpRightPhone extends Phone {
// Constructors
public UpRightPhone(Brand brand) {
super(brand);
}
@Override
public void open() {
super.open();
System.out.println(" Upright cell phone ");
}
@Override
public void close() {
super.close();
System.out.println(" Upright cell phone ");
}
@Override
public void call() {
super.call();
System.out.println(" Upright cell phone ");
}
}

Did you find , Self supporting mobile phone open, Is calling the parent class open, And the parent class calls the interface

We use demo To experience the different brands and styles of mobile phones under the bridge mode

public static void main(String[] args) {
// Get a foldable phone ( style + brand )
Phone phone1 = new UpRightPhone(new Vivo());
phone1.open();
phone1.call();
phone1.close();
}
The operation results are as follows :
Vivo Turn on the phone
Upright cell phone
Vivo Cell phone calls
Upright cell phone
Vivo Mobile phone shutdown
Upright cell phone 

Silicon Valley : Design patterns ( Mr. Han Shunping ): Bridging mode

Refactoring.Guru:《 Deep into design patterns 》

版权声明
本文为[twenty-eight thousand six hundred and forty]所创,转载请带上原文链接,感谢
https://javamana.com/2021/01/20210122222357455l.html

  1. 【计算机网络 12(1),尚学堂马士兵Java视频教程
  2. 【程序猿历程,史上最全的Java面试题集锦在这里
  3. 【程序猿历程(1),Javaweb视频教程百度云
  4. Notes on MySQL 45 lectures (1-7)
  5. [computer network 12 (1), Shang Xuetang Ma soldier java video tutorial
  6. The most complete collection of Java interview questions in history is here
  7. [process of program ape (1), JavaWeb video tutorial, baidu cloud
  8. Notes on MySQL 45 lectures (1-7)
  9. 精进 Spring Boot 03:Spring Boot 的配置文件和配置管理,以及用三种方式读取配置文件
  10. Refined spring boot 03: spring boot configuration files and configuration management, and reading configuration files in three ways
  11. 精进 Spring Boot 03:Spring Boot 的配置文件和配置管理,以及用三种方式读取配置文件
  12. Refined spring boot 03: spring boot configuration files and configuration management, and reading configuration files in three ways
  13. 【递归,Java传智播客笔记
  14. [recursion, Java intelligence podcast notes
  15. [adhere to painting for 386 days] the beginning of spring of 24 solar terms
  16. K8S系列第八篇(Service、EndPoints以及高可用kubeadm部署)
  17. K8s Series Part 8 (service, endpoints and high availability kubeadm deployment)
  18. 【重识 HTML (3),350道Java面试真题分享
  19. 【重识 HTML (2),Java并发编程必会的多线程你竟然还不会
  20. 【重识 HTML (1),二本Java小菜鸟4面字节跳动被秒成渣渣
  21. [re recognize HTML (3) and share 350 real Java interview questions
  22. [re recognize HTML (2). Multithreading is a must for Java Concurrent Programming. How dare you not
  23. [re recognize HTML (1), two Java rookies' 4-sided bytes beat and become slag in seconds
  24. 造轮子系列之RPC 1:如何从零开始开发RPC框架
  25. RPC 1: how to develop RPC framework from scratch
  26. 造轮子系列之RPC 1:如何从零开始开发RPC框架
  27. RPC 1: how to develop RPC framework from scratch
  28. 一次性捋清楚吧,对乱糟糟的,Spring事务扩展机制
  29. 一文彻底弄懂如何选择抽象类还是接口,连续四年百度Java岗必问面试题
  30. Redis常用命令
  31. 一双拖鞋引发的血案,狂神说Java系列笔记
  32. 一、mysql基础安装
  33. 一位程序员的独白:尽管我一生坎坷,Java框架面试基础
  34. Clear it all at once. For the messy, spring transaction extension mechanism
  35. A thorough understanding of how to choose abstract classes or interfaces, baidu Java post must ask interview questions for four consecutive years
  36. Redis common commands
  37. A pair of slippers triggered the murder, crazy God said java series notes
  38. 1、 MySQL basic installation
  39. Monologue of a programmer: despite my ups and downs in my life, Java framework is the foundation of interview
  40. 【大厂面试】三面三问Spring循环依赖,请一定要把这篇看完(建议收藏)
  41. 一线互联网企业中,springboot入门项目
  42. 一篇文带你入门SSM框架Spring开发,帮你快速拿Offer
  43. 【面试资料】Java全集、微服务、大数据、数据结构与算法、机器学习知识最全总结,283页pdf
  44. 【leetcode刷题】24.数组中重复的数字——Java版
  45. 【leetcode刷题】23.对称二叉树——Java版
  46. 【leetcode刷题】22.二叉树的中序遍历——Java版
  47. 【leetcode刷题】21.三数之和——Java版
  48. 【leetcode刷题】20.最长回文子串——Java版
  49. 【leetcode刷题】19.回文链表——Java版
  50. 【leetcode刷题】18.反转链表——Java版
  51. 【leetcode刷题】17.相交链表——Java&python版
  52. 【leetcode刷题】16.环形链表——Java版
  53. 【leetcode刷题】15.汉明距离——Java版
  54. 【leetcode刷题】14.找到所有数组中消失的数字——Java版
  55. 【leetcode刷题】13.比特位计数——Java版
  56. oracle控制用户权限命令
  57. 三年Java开发,继阿里,鲁班二期Java架构师
  58. Oracle必须要启动的服务
  59. 万字长文!深入剖析HashMap,Java基础笔试题大全带答案
  60. 一问Kafka就心慌?我却凭着这份,图灵学院vip课程百度云