package com.szh.principle.inversion;
 
/**
 *
 */
class Email {
    public String getInfo() {
        return "電子郵件信息: hello,world";
    }
}
 
// 完成Person接收消息的功能
// 方式1分析
//   1. 簡單，比較容易想到
//   2. 如果我們獲取的對象是 微信，短信等等，則新增類，同時Person也要增加相應的接收方法
//   3. 解決思路：引入一個抽象的接口IReceiver, 表示接收者, 這樣Person類與接口IReceiver發(fā)生依賴
//   因為Email, WeiXin 等等屬于接收的范圍，他們各自實現(xiàn)IReceiver 接口就ok, 這樣我們就符號依賴倒轉原則
class Person {
    public void receive(Email email ) {
        System.out.println(email.getInfo());
    }
}
 
public class DependencyInversion {
    public static void main(String[] args) {
        Person person = new Person();
        person.receive(new Email());
    }
}

package com.szh.principle.inversion.improve;
 
/**
 *
 */
//定義接口
interface IReceiver {
    public String getInfo();
}
 
class Email implements IReceiver {
    public String getInfo() {
        return "電子郵件信息: hello,world";
    }
}
 
//增加微信
class WeiXin implements IReceiver {
    public String getInfo() {
        return "微信信息: hello,ok";
    }
}
 
//方式2
class Person {
    //這里我們是對接口的依賴
    public void receive(IReceiver receiver ) {
        System.out.println(receiver.getInfo());
    }
}
 
public class DependencyInversion {
    public static void main(String[] args) {
        //客戶端無需改變
        Person person = new Person();
        person.receive(new Email());
        person.receive(new WeiXin());
    }
}

package com.szh.principle.inversion.improve;
 
/**
 * 方式1: 通過接口傳遞實現(xiàn)依賴
 */
 interface IOpenAndClose1 {
    public void open(ITV1 tv); //抽象方法,接收接口
 }
 
 interface ITV1 { //ITV接口
    public void play();
 }
 
class OpenAndClose1 implements IOpenAndClose1 {
     @Override
     public void open(ITV1 tv){
         tv.play();
     }
}
 
 class ChangHong1 implements ITV1 {
	@Override
	public void play() {
		System.out.println("長虹電視機，打開");
	}
 }
 
public class DependencyPass1 {
    public static void main(String[] args) {
        ChangHong1 changHong = new ChangHong1();
		OpenAndClose1 openAndClose = new OpenAndClose1();
		openAndClose.open(changHong);
    }
}

package com.szh.principle.inversion.improve;
 
/**
 * 方式2: 通過構造方法依賴傳遞
 */
 interface IOpenAndClose2 {
    public void open(); //抽象方法
 }
 
 interface ITV2 { //ITV接口
    public void play();
 }
 
 class OpenAndClose2 implements IOpenAndClose2 {
    public ITV2 tv; //成員
 
    public OpenAndClose2(ITV2 tv){ //構造器
        this.tv = tv;
    }
 
    public void open(){
        this.tv.play();
    }
 }
 
class ChangHong2 implements ITV2 {
    public void play() {
        System.out.println("長虹電視機，打開");
    }
}
 
public class DependencyPass2 {
    public static void main(String[] args) {
        ChangHong2 changHong = new ChangHong2();
        //通過構造器進行依賴傳遞
		OpenAndClose2 openAndClose = new OpenAndClose2(changHong);
		openAndClose.open();
    }
}

package com.szh.principle.inversion.improve;
 
/**
 * 方式3: 通過setter方法傳遞
 */
interface IOpenAndClose3 {
    public void open(); // 抽象方法
    public void setTv(ITV3 tv);
}
 
interface ITV3 { // ITV接口
    public void play();
}
 
class OpenAndClose3 implements IOpenAndClose3 {
    private ITV3 tv;
 
    public void setTv(ITV3 tv) {
        this.tv = tv;
    }
 
    public void open() {
        this.tv.play();
    }
}
 
class ChangHong3 implements ITV3 {
    public void play() {
        System.out.println("長虹電視機，打開");
    }
}
 
public class DependencyPass3 {
    public static void main(String[] args) {
        ChangHong3 changHong = new ChangHong3();
        //通過setter方法進行依賴傳遞
        OpenAndClose3 openAndClose = new OpenAndClose3();
        openAndClose.setTv(changHong);
        openAndClose.open();
    }
}