GoLang设计模式03 - 抽象工厂模式
之前我们介绍了工厂设计模式,现在我们再看一下抽象工厂设计模式。抽象工程模式顾名思义就是对工厂模式的一层抽象,也是创建型模式的一种,通常用来创建一组存在相关性的对象。
UML类图大致如下:

类图比较复杂,最好用个例子来说明。比方说,国内有两家生产运动服的工厂:nike和adidas 。现在我们想购买一套运动服,包含短裤(short)和运动鞋(shoe)。通常我们都会在同一家工厂购买整套的运动服。这时抽象工厂模式就可以发挥作用了。
现在我们需要的产品有两种:短裤(short)和运动鞋(shoe)。
生产这些产品的工厂有两家:nike和adidas。
nike和adidas都是运动服厂商,可以视为是 iSportsFactory接口的实现
然后,我们还要为具体的产品定义两个接口:
iShort,它有两个实现,分别是nikeShort和adidasShortiShoe,它也有两个实现,分别是nikeShoe和adidasShoe
看下具体的代码:
iSportsFactory.go
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package mainimport "fmt"type iSportsFactory interface { makeShoe() iShoe makeShort() iShort}func getSportsFactory(brand string) (iSportsFactory, error) { if brand == "adidas" { return &adidas{}, nil } if brand == "nike" { return &nike{}, nil } return nil, fmt.Errorf("Wrong brand type passed")} |
iShort.go
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package maintype iShort interface { setLogo(logo string) setSize(size int) getLogo() string getSize() int}type short struct { logo string size int}func (s *short) setLogo(logo string) { s.logo = logo}func (s *short) getLogo() string { return s.logo}func (s *short) setSize(size int) { s.size = size}func (s *short) getSize() int { return s.size} |
iShoe.go
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package maintype iShoe interface { setLogo(logo string) setSize(size int) getLogo() string getSize() int}type shoe struct { logo string size int}func (s *shoe) setLogo(logo string) { s.logo = logo}func (s *shoe) getLogo() string { return s.logo}func (s *shoe) setSize(size int) { s.size = size}func (s *shoe) getSize() int { return s.size} |
nike.go
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package maintype nike struct {}type nikeShoe struct { shoe}type nikeShort struct { short}func (n *nike) makeShoe() iShoe { return &nikeShoe{ shoe: shoe{ logo: "nike", size: 14, }, }}func (n *nike) makeShort() iShort { return &nikeShort{ short: short{ logo: "nike", size: 14, }, }} |
adidas.go
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package maintype adidas struct {}type adidasShoe struct { shoe}type adidasShort struct { short}func (a *adidas) makeShoe() iShoe { return &adidasShoe{ shoe: shoe{ logo: "adidas", size: 14, }, }}func (a *adidas) makeShort() iShort { return &adidasShort{ short: short{ logo: "adidas", size: 14, }, }} |
main.go
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package mainimport "fmt"func main() { adidasFactory, _ := getSportsFactory("adidas") nikeFactory, _ := getSportsFactory("nike") nikeShoe := nikeFactory.makeShoe() nikeShort := nikeFactory.makeShort() adidasShoe := adidasFactory.makeShoe() adidasShort := adidasFactory.makeShort() printShoeDetails(nikeShoe) printShortDetails(nikeShort) printShoeDetails(adidasShoe) printShortDetails(adidasShort)}func printShoeDetails(s iShoe) { fmt.Printf("Logo: %s", s.getLogo()) fmt.Println() fmt.Printf("Size: %d", s.getSize()) fmt.Println()}func printShortDetails(s iShort) { fmt.Printf("Logo: %s", s.getLogo()) fmt.Println() fmt.Printf("Size: %d", s.getSize()) fmt.Println()} |
代码已上传至GitHub:zhyea / go-patterns / abstract-factory-pattern
End!
仅是学习笔记,难免出错,望不吝指点
转 https://www.cnblogs.com/amunote/p/15236587.html
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