设计模式实例(Lua)笔记之二（AbstractFactory抽象工厂模式）

1.描述   

    上一篇博文讲到女娲造人,人是造出来了,世界时热闹了,可是低头一看,都是清一色的类型,缺少关爱、仇恨、喜怒哀乐等情绪,人类的生命太平淡了,女娲一想,猛然一拍脑袋,Shit!忘记给人类定义性别了,那怎么办?抹掉重来,然后就把人类重新洗牌,准备重新开始制造人类。
由于先前的工作已经花费了很大的精力做为铺垫,也不想从头开始了,那先说人类(Product 产品类)怎么改吧,好,有了,给每个人类都加一个性别,然后再重新制造,这个问题解决了,那八卦炉怎么办?只有一个呀,要么生产出全都是男性,要不都是女性,那不行呀,有了,把已经有了一条生产线——八卦炉(工厂模式中的 Concrete Factory)拆开,于是女娲就使用了“八卦拷贝术”,把原先的八卦炉一个变两个,并且略加修改,就成了女性八卦炉(只生产女性,一个具体工厂的实现类)和男性八卦炉(只生产男性,又一个具体工厂的实现类),这个过程的类图如下:

2. 代码：

require "class"

--------IHuman -------

IHuman = class()

function IHuman:Laugh()

end

function IHuman:Cry()

end

function IHuman:Talk()

end

function IHuman:Sex()

end

--------BlackHuman -------

BlackHuman = class(IHuman)

function BlackHuman:Laugh()
print("黑人会笑")
end

function BlackHuman:Cry()
print("黑人会哭")
end

function BlackHuman:Talk()
print("黑人可以说话，一般人听不懂")
end

function BlackHuman:Sex()

end

--------BlackMaleHuman -------

BlackMaleHuman = class(BlackHuman)

function BlackHuman:Sex()
print("该黑种人的性别为男...")
end

--------BlackMaleHuman -------

BlackFemaleHuman = class(BlackHuman)

function BlackFemaleHuman:Sex()
print("该黑种人的性别为女...")
end

--------WhiteHuman -------

WhiteHuman = class(IHuman)

function WhiteHuman:Laugh()
print("白色人种会大笑，侵略的笑声")
end

function WhiteHuman:Cry()
print("白色人种会哭")
end

function WhiteHuman:Talk()
print("白色人种会说话，一般都是单字节")
end

function WhiteHuman:Sex()

end

--------WhiteMaleHuman -------

WhiteMaleHuman = class(BlackHuman)

function WhiteMaleHuman:Sex()
print("该白种人的性别为男...")
end

--------WhiteFemaleHuman -------

WhiteFemaleHuman = class(WhiteMaleHuman)

function WhiteFemaleHuman:Sex()
print("该白种人的性别为女...")
end

--------YellowHuman -------

YellowHuman = class(IHuman)

function YellowHuman:Laugh()
print("黄色人种会大笑，幸福呀！")
end

function YellowHuman:Cry()
print("黄色人种会哭")
end

function YellowHuman:Talk()
print("黄色人种会说话，一般说的都是双字节")
end

function YellowHuman:Sex()

end

--------YellowMaleHuman -------

YellowMaleHuman = class(YellowHuman)

function YellowMaleHuman:Sex()
print("该黄种人的性别为男...")
end

--------YellowFemaleHuman -------

YellowFemaleHuman = class(BlackHuman)

function YellowFemaleHuman:Sex()
print("该黄种人的性别为女...")
end

--------IHumanFactory -------

IHumanFactory = class()

function IHumanFactory:CreateYellowHuman()

end

function IHumanFactory:CreateWhiteHuman()

end

function IHumanFactory:CreateBlackHuman()

end

--------MaleHumanFactory -------

MaleHumanFactory = class(IHumanFactory)

-- 创造(男)工厂类
function MaleHumanFactory:CreateYellowHuman()
return YellowMaleHuman.new()
end

function MaleHumanFactory:CreateWhiteHuman()
return WhiteMaleHuman.new()
end

function MaleHumanFactory:CreateBlackHuman()
return BlackMaleHuman.new()
end

--------FemaleHumanFactory -------

FemaleHumanFactory = class(IHumanFactory)

-- 创造(女)工厂类
function FemaleHumanFactory:CreateYellowHuman()
return YellowFemaleHuman.new()
end

function FemaleHumanFactory:CreateWhiteHuman()
return WhiteFemaleHuman.new()
end

function FemaleHumanFactory:CreateBlackHuman()
return BlackFemaleHuman.new()
end

-------- main -------

function main()
-- 第一条生产线，男性生产线
local maleHumanFactory = MaleHumanFactory.new()

-- 第二条生产线，女性生产线
local femaleHumanFactory = FemaleHumanFactory.new()

-- 生产线建立完毕，开始生产人了
local maleYellowHuman = maleHumanFactory:CreateYellowHuman()
local femaleYellowHuman = femaleHumanFactory:CreateYellowHuman()

print("---生产一个黄色女性---")
femaleYellowHuman:Laugh()
femaleYellowHuman:Cry()
femaleYellowHuman:Talk()
femaleYellowHuman:Sex()

print("---生产一个黄色男性---")
maleYellowHuman:Laugh()
maleYellowHuman:Cry()
maleYellowHuman:Talk()
maleYellowHuman:Sex()
end

main()
运行代码，结果如下: