設計模式之python版（四）代理模式

代理模式

應用特性：需要在通訊雙方中間需要一些特殊的中間操作時引用，多加一個中間控制層。

結構特性：建立一個中間類，建立一個對象，接收一個對象，然後把兩者聯通起來

UML：

#!/usr/bin/env python  #encoding: utf-8    class sender_base:    def __init__(self):        pass        def send_something(self, something):          pass     class send_class(sender_base):    def __init__(self, receiver):        self.receiver = receiver            def send_something(self, something):          print "SEND " + something + ' TO ' + self.receiver.nameclass agent_class(sender_base):    def __init__(self, receiver):        self.send_obj = send_class(receiver)        def send_something(self, something):        self.send_obj.send_something(something)        class receive_class:    def __init__(self, someone):        self.name = someone              if '__main__' == __name__:      receiver = receive_class('xiaohua')    agent = agent_class(receiver)    agent.send_something('agentinfo')        print receiver.__class__    print agent.__class__    

結果：

SEND agentinfo TO xiaohua__main__.receive_class__main__.agent_class