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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 #include "stdmisc.h"
00027 
00028 #include "nel/misc/class_registry.h"
00029 
00030 #include <typeinfo>
00031 
00032 using namespace std;
00033 
00034 namespace NLMISC
00035 {
00036 
00037 
00038 // ======================================================================================================
00039 set<CClassRegistry::CClassNode>         *CClassRegistry::RegistredClasses = NULL;
00040 
00041 
00042 // ======================================================================================================
00043 void            CClassRegistry::init()
00044 {
00045         if (RegistredClasses == NULL)
00046                 RegistredClasses = new set<CClassRegistry::CClassNode>();
00047 }
00048 
00049         
00050 // ======================================================================================================
00051 IClassable      *CClassRegistry::create(const string &className)  throw(ERegistry)
00052 {
00053         init();
00054 
00055         set<CClassNode>::iterator       it;
00056         CClassNode      node;
00057 
00058         node.ClassName= className;
00059         it=RegistredClasses->find(node);
00060 
00061         if(it==RegistredClasses->end())
00062                 return NULL;
00063         else
00064         {
00065                 IClassable      *ptr;
00066                 ptr=it->Creator();
00067                 #ifdef NL_DEBUG
00068                         nlassert(CClassRegistry::checkObject(ptr));
00069                 #endif
00070                 return ptr;
00071         }
00072 
00073 }
00074 
00075 // ======================================================================================================
00076 void            CClassRegistry::registerClass(const string &className, IClassable* (*creator)(), const string &typeidCheck)  throw(ERegistry)
00077 {
00078         init();
00079 
00080         CClassNode      node;
00081         node.ClassName= className;
00082         node.Creator=creator;
00083         node.TypeIdCheck= typeidCheck;
00084         if(!RegistredClasses->insert(node).second)
00085         {
00086                 nlstop;
00087                 throw ERegisteredClass();
00088         }
00089 }
00090 
00091 // ======================================================================================================
00092 bool            CClassRegistry::checkObject(IClassable* obj)
00093 {
00094         init();
00095 
00096         set<CClassNode>::iterator       it;
00097         CClassNode      node;
00098         node.ClassName= obj->getClassName();
00099 
00100         it=RegistredClasses->find(node);
00101         if(it==RegistredClasses->end())
00102                 return false;
00103         node= *it;
00104 
00105         if( node.TypeIdCheck != string(typeid(*obj).name()) )
00106                 return false;
00107 
00108         return true;
00109 }
00110 
00111 
00112 
00113 }
00114
class_registry.cpp
