go-pattern-examples/creation/00_simple_factory/simple.go
2020-04-21 22:53:23 +08:00

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package simplefactory
import "fmt"
type schoolmember int
const (
student schoolmember = iota
teacher
)
//Mouth is interface that people can Say words
type Mouth interface {
Say(name string) string
}
//New return instance object that have `Mouth` and can speak
func New(t schoolmember) Mouth {
switch t {
case student:
return &studentType{}
case teacher:
return &teacherType{}
}
return nil
}
//teacherType is one of Mouth implement
type teacherType struct{}
//Say teacher's name
func (*teacherType) Say(name string) string {
return fmt.Sprintf("I am Teacher: %s", name)
}
//studentType is another Mouth implement
type studentType struct{}
//Say student's name
func (*studentType) Say(name string) string {
return fmt.Sprintf("I am Student %s", name)
}