nevrax.org : docs

00001 
+00007 /* Copyright, 2000 Nevrax Ltd.
+00008  *
+00009  * This file is part of NEVRAX NEL.
+00010  * NEVRAX NEL is free software; you can redistribute it and/or modify
+00011  * it under the terms of the GNU General Public License as published by
+00012  * the Free Software Foundation; either version 2, or (at your option)
+00013  * any later version.
+00014 
+00015  * NEVRAX NEL is distributed in the hope that it will be useful, but
+00016  * WITHOUT ANY WARRANTY; without even the implied warranty of
+00017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+00018  * General Public License for more details.
+00019 
+00020  * You should have received a copy of the GNU General Public License
+00021  * along with NEVRAX NEL; see the file COPYING. If not, write to the
+00022  * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+00023  * MA 02111-1307, USA.
+00024  */
+00025 
+00026 #ifndef NL_CLASS_REGISTRY_H
+00027 #define NL_CLASS_REGISTRY_H
+00028 
+00029 #include        "nel/misc/types_nl.h"
+00030 #include        "nel/misc/common.h"
+00031 #include        <typeinfo>
+00032 #include        <string>
+00033 #include        <set>
+00034 
+00035 
+00036 namespace       NLMISC
+00037 {
+00038 
+00039 
+00040 // ======================================================================================================
+00047 struct ERegistry : public Exception
+00048 {
+00049         ERegistry() : Exception( "Registry error" ) {};
+00050 
+00051         ERegistry( const std::string& str ) : Exception( str ) {};
+00052 };
+00053 
+00054 struct ERegisteredClass : public ERegistry
+00055 {
+00056         ERegisteredClass() : ERegistry( "Class already registered" ) {};
+00057 };
+00058 
+00059 struct EUnregisteredClass : public ERegistry
+00060 {
+00061         EUnregisteredClass() : ERegistry( "Class not registered" ) {}
+00062         EUnregisteredClass(const std::string &className) : ERegistry( std::string("Class not registered : ") + className ) {}
+00063 };
+00064 
+00065 
+00066 // ======================================================================================================
+00073 class IClassable
+00074 {
+00075 public:
+00076         virtual std::string             getClassName() =0;
+00077 };
+00078 
+00079 
+00080 // ======================================================================================================
+00087 class CClassRegistry
+00088 {
+00089 public:
+00090 
+00092         static  void            registerClass(const std::string &className, IClassable* (*creator)(), const std::string &typeidCheck) throw(ERegistry);
+00093 
+00095         static  IClassable      *create(const std::string &className) throw(ERegistry);
+00096 
+00098         static  bool            checkObject(IClassable* obj);
+00099 
+00100 
+00101 private:
+00102         struct  CClassNode
+00103         {
+00104                 std::string                     ClassName;
+00105                 std::string                     TypeIdCheck;
+00106                 IClassable*     (*Creator)();
+00107                 bool    operator<(const CClassNode &n) const
+00108                 {
+00109                         return ClassName<n.ClassName;
+00110                 }
+00111         };
+00112         static  std::set<CClassNode>            *RegistredClasses;
+00113 
+00115         static void                     init();
+00116 };
+00117 
+00118 
+00120 #define NLMISC_DECLARE_CLASS(_class_)                                   \
+00121         virtual std::string     getClassName() {return #_class_;}               \
+00122         static  NLMISC::IClassable      *creator() {return new _class_;}
+00123 #define NLMISC_REGISTER_CLASS(_class_) NLMISC::CClassRegistry::registerClass(#_class_, _class_::creator, typeid(_class_).name());
+00124 
+00125 
+00126 
+00127 }       // namespace NLMISC.
+00128 
+00129 
+00130 #endif // NL_STREAM_H
+00131 
+00132 /* End of stream.h */
+
class_registry.h
