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add prototype
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senghoo committed Mar 23, 2016
1 parent 450e19a commit 5dc8ad1
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5 changes: 5 additions & 0 deletions 07_prototype/README.md
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# 原型模式

原型模式使对象能复制自身,并且暴露到接口中,使客户端面向接口编程时,不知道接口实际对象的情况下生成新的对象。

原型模式配合原型管理器使用,使得客户端在不知道具体类的情况下,通过接口管理器得到新的实例,并且包含部分预设定配置。
24 changes: 24 additions & 0 deletions 07_prototype/prototype.go
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package prototype

//Cloneable 是原型对象需要实现的接口
type Cloneable interface {
Clone() Cloneable
}

type PrototypeManager struct {
prototypes map[string]Cloneable
}

func NewPrototypeManager() *PrototypeManager {
return &PrototypeManager{
prototypes: make(map[string]Cloneable),
}
}

func (p *PrototypeManager) Get(name string) Cloneable {
return p.prototypes[name]
}

func (p *PrototypeManager) Set(name string, prototype Cloneable) {
p.prototypes[name] = prototype
}
52 changes: 52 additions & 0 deletions 07_prototype/prototype_test.go
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package prototype

import "testing"

var manager *PrototypeManager

type Type1 struct {
name string
}

func (t *Type1) Clone() Cloneable {
tc := *t
return &tc
}

type Type2 struct {
name string
}

func (t *Type2) Clone() Cloneable {
tc := *t
return &tc
}

func TestClone(t *testing.T) {
t1 := manager.Get("t1")

t2 := t1.Clone()

if t1 == t2 {
t.Fatal("error! get clone not working")
}
}

func TestCloneFromManager(t *testing.T) {
c := manager.Get("t1").Clone()

t1 := c.(*Type1)
if t1.name != "type1" {
t.Fatal("error")
}

}

func init() {
manager = NewPrototypeManager()

t1 := &Type1{
name: "type1",
}
manager.Set("t1", t1)
}

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