74 lines
1.1 KiB
Go
74 lines
1.1 KiB
Go
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
)
|
||
|
|
|
||
|
|
type Director struct {
|
||
|
|
builder Builder
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *Director) SetBuilder(builder Builder) {
|
||
|
|
d.builder = builder
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *Director) Generate() *Car {
|
||
|
|
d.builder.NewProduct()
|
||
|
|
d.builder.BuildChassis()
|
||
|
|
d.builder.BuildSeat()
|
||
|
|
d.builder.BuildWheels()
|
||
|
|
return d.builder.GetResult().(*Car)
|
||
|
|
}
|
||
|
|
|
||
|
|
type Car struct {
|
||
|
|
Wheels string
|
||
|
|
Chassis string
|
||
|
|
Seat string
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *Car) Show() {
|
||
|
|
fmt.Printf("\n%s\n%s\n%s\n", c.Wheels, c.Chassis, c.Seat)
|
||
|
|
}
|
||
|
|
|
||
|
|
type Builder interface {
|
||
|
|
NewProduct()
|
||
|
|
BuildWheels()
|
||
|
|
BuildChassis()
|
||
|
|
BuildSeat()
|
||
|
|
GetResult() interface{}
|
||
|
|
}
|
||
|
|
|
||
|
|
type CarBuilder struct {
|
||
|
|
Car *Car
|
||
|
|
}
|
||
|
|
|
||
|
|
func (cb *CarBuilder) GetResult() interface{} {
|
||
|
|
return cb.Car
|
||
|
|
}
|
||
|
|
|
||
|
|
func (cb *CarBuilder) NewProduct() {
|
||
|
|
cb.Car = new(Car)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (cb *CarBuilder) BuildWheels() {
|
||
|
|
cb.Car.Wheels = "build wheels"
|
||
|
|
}
|
||
|
|
|
||
|
|
func (cb *CarBuilder) BuildChassis() {
|
||
|
|
cb.Car.Chassis = "build chassis"
|
||
|
|
}
|
||
|
|
|
||
|
|
func (cb *CarBuilder) BuildSeat() {
|
||
|
|
cb.Car.Seat = "build seat"
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
// 创建一个指挥者
|
||
|
|
director := new(Director)
|
||
|
|
// 创建建造者
|
||
|
|
builder := new(CarBuilder)
|
||
|
|
director.SetBuilder(builder)
|
||
|
|
car := director.Generate()
|
||
|
|
car.Show()
|
||
|
|
}
|