前言

本文章嘗試使用go實現(xiàn)“抽象工廠”。

代碼

package main

import (
	"fmt"
)

// 所有系列產(chǎn)品A接口
type IAbstractProductA interface {
	UsefulFunctionA() string
}

// 系列1具體產(chǎn)品A
type ConcreteProductA1 struct {
}

func (ConcreteProductA1) UsefulFunctionA() string {
	return "The result of the product A1."
}

// 系列2具體產(chǎn)品A
type ConcreteProductA2 struct {
}

func (ConcreteProductA2) UsefulFunctionA() string {
	return "The result of the product A2."
}

// 所有系列產(chǎn)品B接口
type IAbstractProductB interface {
	UsefulFunctionB() string
	AnotherUsefulFunctionB(collaborator IAbstractProductA) string
}

// 系列1具體產(chǎn)品B
type ConcreteProductB1 struct {
}

func (ConcreteProductB1) UsefulFunctionB() string {
	return "The result of the product B1."
}

func (ConcreteProductB1) AnotherUsefulFunctionB(collaborator IAbstractProductA) string {
	result := collaborator.UsefulFunctionA()
	return fmt.Sprintf("The result of the B1 collaborating with the (%s)", result)
}

// 系列2具體產(chǎn)品B
type ConcreteProductB2 struct {
}

func (ConcreteProductB2) UsefulFunctionB() string {
	return "The result of the product B2."
}

func (ConcreteProductB2) AnotherUsefulFunctionB(collaborator IAbstractProductA) string {
	result := collaborator.UsefulFunctionA()
	return fmt.Sprintf("The result of the B2 collaborating with the (%s)", result)
}

// 抽象工廠接口定義一系列方法返回同個系列的若干抽象產(chǎn)品
type IAbstractFactory interface {
	CreateProductA() IAbstractProductA
	CreateProductB() IAbstractProductB
}

// 具體工廠1
type ConcreteFactory1 struct {
}

func (ConcreteFactory1) CreateProductA() IAbstractProductA {
	return &ConcreteProductA1{}
}

func (ConcreteFactory1) CreateProductB() IAbstractProductB {
	return &ConcreteProductB1{}
}

// 具體工廠2
type ConcreteFactory2 struct {
}

func (ConcreteFactory2) CreateProductA() IAbstractProductA {
	return &ConcreteProductA2{}
}

func (ConcreteFactory2) CreateProductB() IAbstractProductB {
	return &ConcreteProductB2{}
}

// 客戶端代碼
func clientCode(factory IAbstractFactory) {
	product_a := factory.CreateProductA()
	product_b := factory.CreateProductB()
	fmt.Println(product_b.UsefulFunctionB())
	fmt.Println(product_b.AnotherUsefulFunctionB(product_a))
}

func main() {
	fmt.Println("Client: Testing client code with the first factory type:")
	clientCode(&ConcreteFactory1{})
	fmt.Println()
	fmt.Println("Client: Testing the same client code with the second factory type:")
	clientCode(&ConcreteFactory2{})
}

結(jié)果

Client: Testing client code with the first factory type:
The result of the product B1.
The result of the B1 collaborating with the (The result of the product A1.)

Client: Testing the same client code with the second factory type:
The result of the product B2.
The result of the B2 collaborating with the (The result of the product A2.)

總結(jié)

新人設(shè)計模式理解，望大家多多指點。文章來源地址http://www.zghlxwxcb.cn/news/detail-589059.html

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