Design mode--mixin Mode __ design mode

design pattern--mixin modeCategory: Design&architecture 2011-09-09 15:27 322 people read Comments (0) Favorites Report design mode decorator class Java basic NULL adapter mode: Convert an interface to another interface.

Decorator mode: Dynamically adding functionality to an object. For example, the new Bufferedoutputstream (New FileOutputStream ("A-file-name")) in Java, Bufferedoutputstream adds buffer writing to FileOutputStream objects. This is the decorator mode.

Mixin mode: Generally speaking, it is to synthesize the functions of multiple classes to produce a class, but do not inherit more. The following is the implementation of a C + + mixin mode. Java with decorator can be implemented Mixin,java can also be implemented through dynamic Proxy (dynamics proxy) to achieve mixin, but it does not look as direct as C + +.[CPP]  View Plain Copy// tst.cpp : defines the entry point for the  console application.  //  /*  result:  1314091501  1  1314091501   2      */      #include   "stdafx.h"    #include  < iostream>   #include  <string>   #include  <time.h>   using  namespace std;       class basic {   public:       long val;   };      Template <class  T>   class timestamp: public t   {        private:           long timestamp;       public:           timestamp ()  {& NBsp;              timestamp=time (NULL);            }            long gettimestamp ()  {                return timestamp;            }   };       template <class t>   class serialnumbered:  public T   {       private:            long serialNumber;            static long counter;        public:            serialnumbered ()  {                serialnumber = ++ counter;             }           long getserialnumber ()  {               return  serialnumber;            }