Go言語で factory method パターンを書いてみる

正しいか分かりませんが、Go言語でfactory method パターンを書いてみました。

factory.go

package main

import "fmt"

// created struct
type PersonStruct struct {
	Name string
}
type Person interface {
	GetZikoshoukai() string
}

type Man struct {
	PersonStruct
}
func (man *Man) GetZikoshoukai() string {
	return man.Name + "だぜ！"
}

type Woman struct{
	PersonStruct
}
func (woman *Woman) GetZikoshoukai() string {
	return woman.Name + "よ！"
}

// factory
type Factory interface {
	CreateInstance(name string) Person
}

type ManFactory struct {}
func (factory *ManFactory) CreateInstance(name string) Person {
	man := new(Man)
	man.Name = name
	var person Person = man
	return person
}

type WomanFactory struct {}
func (factory *WomanFactory) CreateInstance(name string) Person {
	woman := new(Woman)
	woman.Name = name
	var person Person = woman
	return person
}

// entry point
func main() {
	var factory Factory = new(ManFactory)
	man := factory.CreateInstance("ひろし")
	fmt.Println(man.GetZikoshoukai())

	factory = new(WomanFactory)
	woman := factory.CreateInstance("なおこ")
	fmt.Println(woman.GetZikoshoukai())
}

クラスで言うと、Personが親クラスでManとWomanが子クラスということになります。