Connect to:
http://www.9cbs.net/develop/read_article.asp?id=12040
The use of factory methods have the following benefits, players only processes the PRODUCT interface, but every time you have a new goal, you must let this player to learn this method, or change a team member. The player base class creates a goal in the class instead of being created directly, providing a hook for the subclass. Provide parallel class level. The code is as follows: Class player {public: Virtual goal * Create (scientific type);
Goal * Players :: Create (Id Type ID) {IF (ID == High Empty Ball) Return New Headball Entire; IF (ID == Half Globe) Return New Pumping Drake; File: // Repeat For Remaining Products ... returnography;}
Goal * Time Machine :: Created (Id) {IF (ID == High Empty Ball) Return New Ball Hook; if (ID == Half-High Ball) Return New Chest or Shoulder Shift; if (ID == Low-ball) Return New fishing top; Return player :: Create (ID); // Call when all other failures}
