Prototype Pattern Sample Code (c + +)

1 // --------------------------------------------------------------------------------------2 /** Abstract.h **/3 4 classAbstract {5 Private:6typedef map<type_t, Abstract*>RegMap;7     Staticregmap&GetRegistry () {8         StaticRegMap Registry;//initialized at the first time, the function is called9         returnregistry;Ten     } One  Public: AAbstract (Consttype_t&type) { -         if(Lookup (type)! =NULL) -Getregistry.insert (Type, This); the     } -  -     Virtual~Abstract () {} -  +     Virtualabstract* Clone () =0;  -  +     Staticabstract* Create (Consttype_t&type) {  Aabstract* stub =lookup (type); at         returnStub! = null:stub->Clone (): NULL; -     } -  -     Virtual voidDestroy () {Delete  This; } -  -     Static ConstAbstract* Lookup (Consttype_t&type) { in         if(GetRegistry (). Find (type)! =getregistry (). End ()) -             returngetregistry () [type]; to         returnNULL; +     } - }; the  * // -------------------------------------------------------------------------------------- $ /** ConcreteA.h **/Panax Notoginseng  - classConcretea: PublicAbstract { the     //.. data Members +concretea* Clone () {return NewConcretea (* This); } A  Public: theConcretea (): Abstract (conc_type_a) {}//conc_type_a:constant +     //... other members - }; $  $ // -------------------------------------------------------------------------------------- - /** ConcreteA.cpp **/ -  the     StaticConcretea __concrete_a_stub/*(...)*/;//static initialized - Wuyi // -------------------------------------------------------------------------------------- the /** ConcreteB.h **/ -  Wu classCONCRETEB: PublicAbstract { -     //.. data Members Aboutconcreteb* Clone () {return NewCONCRETEB (* This); } $  Public: -Concreteb (): Abstract (conc_type_b) {}//conc_type_b:constant -     //... other members - }; A  + // -------------------------------------------------------------------------------------- the /** ConcreteB.cpp **/ -  $     StaticConcreteb __concrete_b_stub/*(...)*/;  the  the // -------------------------------------------------------------------------------------- the /** Client **/ the  -abstract* p_abstract = abstract::create (conc_type_a/*or Conc_type_b*/); in //... some code theP_abstract->destroy (); the  About // --------------------------------------------------------------------------------------

Prototype Pattern Sample Code (c + +)