1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55

package main

import "fmt"

// 主调方依赖的目标接口
type computer interface {
	insertIntoLightningPort()
}

// 已实现目标接口
type mac struct{}

func (m *mac) insertIntoLightningPort() {
	fmt.Println("Lightning connector is plugged into mac machine.")
}

// 未实现目标接口，待适配
type windows struct{}

func (w *windows) insertIntoUSBPort() {
	fmt.Println("USB connector is plugged into windows machine.")
}

// 适配器
type windowsAdapter struct {
	windowMachine *windows
}

// 适配器通过能力转换（适配），实现目标接口
func (w *windowsAdapter) insertIntoLightningPort() {
	fmt.Println("Adapter converts Lightning signal to USB......")
	w.windowMachine.insertIntoUSBPort()
}

// 主调方
type client struct{}

// 主调方的业务逻辑依赖的是目标接口，而非具体的实现
func (c *client) insertLightningConnectorIntoComputer(com computer) {
	com.insertIntoLightningPort()
}

func main() {
	client := &client{}
	mac := &mac{}

	client.insertLightningConnectorIntoComputer(mac)

	windowsMachine := &windows{}
	windowsMachineAdapter := &windowsAdapter{
		windowMachine: windowsMachine,
	}

	client.insertLightningConnectorIntoComputer(windowsMachineAdapter)
}