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前言

本文章尝试使用go实现“原型”。

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代码

package mainimport ("fmt"
)// 不同原型标志枚举
type Type intconst (PROTOTYPE_1 Type = iotaPROTOTYPE_2
)// 原型接口
type IPrototype interface {Clone() IPrototypeMethod(value int)Print()
}// 具体原型1
type ConcretePrototype1 struct {name  stringvalue int
}// 构造函数
func NewConcretePrototype1ByFields(name string, value int) *ConcretePrototype1 {return &ConcretePrototype1{name,value,}
}func NewConcretePrototype1ByObject(cp *ConcretePrototype1) *ConcretePrototype1 {return &ConcretePrototype1{name:  cp.name,value: cp.value,}
}// 接口方法
func (cp *ConcretePrototype1) Clone() IPrototype {return NewConcretePrototype1ByObject(cp)
}func (cp *ConcretePrototype1) Method(value int) {cp.value = value
}func (cp *ConcretePrototype1) Print() {fmt.Println("Call Method1 from ", cp.name, " with field : ", cp.value)
}// 具体原型2
type ConcretePrototype2 struct {name  stringvalue int
}// 构造函数
func NewConcretePrototype2ByFields(name string, value int) *ConcretePrototype2 {return &ConcretePrototype2{name,value,}
}func NewConcretePrototype2ByObject(cp *ConcretePrototype2) *ConcretePrototype2 {return &ConcretePrototype2{name:  cp.name,value: cp.value,}
}// 接口方法
func (cp *ConcretePrototype2) Clone() IPrototype {return NewConcretePrototype2ByObject(cp)
}func (cp *ConcretePrototype2) Method(value int) {cp.value = value
}func (cp *ConcretePrototype2) Print() {fmt.Println("Call Method2 from ", cp.name, " with field : ", cp.value)
}// 原型工厂
type PrototypeFactory struct {prototypes map[Type]IPrototype
}func NewPrototypeFactory() *PrototypeFactory {return &PrototypeFactory{prototypes: map[Type]IPrototype{PROTOTYPE_1: NewConcretePrototype1ByFields("PROTOTYPE_1 ", 1),PROTOTYPE_2: NewConcretePrototype2ByFields("PROTOTYPE_2 ", 2),},}
}func (p *PrototypeFactory) CreatePrototype(t Type) IPrototype {return p.prototypes[t].Clone()
}// 客户端代码
func clientCode(p *PrototypeFactory) {fmt.Println("Let's create a Prototype 1")prototype1 := p.CreatePrototype(PROTOTYPE_1)prototype2 := p.CreatePrototype(PROTOTYPE_1)prototype1.Method(3)prototype2.Method(4)prototype1.Print()prototype2.Print()fmt.Println()fmt.Println("Let's create a Prototype 2")prototype1 = p.CreatePrototype(PROTOTYPE_2)prototype2 = p.CreatePrototype(PROTOTYPE_2)prototype1.Method(5)prototype2.Method(6)prototype1.Print()prototype2.Print()
}func main() {clientCode(NewPrototypeFactory())
}

结果

Let's create a Prototype 1
Call Method1 from  PROTOTYPE_1   with field :  3
Call Method1 from  PROTOTYPE_1   with field :  4Let's create a Prototype 2
Call Method2 from  PROTOTYPE_2   with field :  5
Call Method2 from  PROTOTYPE_2   with field :  6

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总结

新人设计模式理解，望大家多多指点。