golang工厂方法

FactoryMethod.go

package main

import "fmt"

type Operator interface {
	SetA(int)
	SetB(int)
	Result() int
}

type OperatorFactory interface {
	Create() Operator
}

type BaseData struct {
	a, b int
}

func (base *BaseData) SetA(a int) {
	base.a = a
}

func (base *BaseData) SetB(b int) {
	base.b = b
}

type PlusOperateFactory struct {}

func (PlusOperateFactory) Create() Operator {
	return &PlusOperate{
		BaseData:BaseData{},
	}
}


type PlusOperate struct {
	BaseData
}

func (p PlusOperate) Result() int {
	return p.a + p.b
}

type RemoveOperate struct {
	BaseData
}

func (r RemoveOperate) Result() int {
	return r.a - r.b
}

func main() {
	r := RemoveOperate{BaseData{}}
	r.SetA(1)
	r.SetB(19)
	fmt.Println(r.Result())

	factory := PlusOperateFactory{}.Create()
	factory.SetA(1)
	factory.SetB(2)
	fmt.Println(factory.Result())
}