GNU CommonC++

objlink.h

Go to the documentation of this file.
00001 // Copyright (C) 2001-2005 Open Source Telecom Corporation.
00002 // Copyright (C) 2006-2010 David Sugar, Tycho Softworks.
00003 //
00004 // This program is free software; you can redistribute it and/or modify
00005 // it under the terms of the GNU General Public License as published by
00006 // the Free Software Foundation; either version 2 of the License, or
00007 // (at your option) any later version.
00008 //
00009 // This program is distributed in the hope that it will be useful,
00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 // GNU General Public License for more details.
00013 //
00014 // You should have received a copy of the GNU General Public License
00015 // along with this program; if not, write to the Free Software
00016 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017 //
00018 // As a special exception to the GNU General Public License, permission is
00019 // granted for additional uses of the text contained in its release
00020 // of Common C++.
00021 //
00022 // The exception is that, if you link the Common C++ library with other
00023 // files to produce an executable, this does not by itself cause the
00024 // resulting executable to be covered by the GNU General Public License.
00025 // Your use of that executable is in no way restricted on account of
00026 // linking the Common C++ library code into it.
00027 //
00028 // This exception does not however invalidate any other reasons why
00029 // the executable file might be covered by the GNU General Public License.
00030 //
00031 // This exception applies only to the code released under the
00032 // name Common C++.  If you copy code from other releases into a copy of
00033 // Common C++, as the General Public License permits, the exception does
00034 // not apply to the code that you add in this way.  To avoid misleading
00035 // anyone as to the status of such modified files, you must delete
00036 // this exception notice from them.
00037 //
00038 // If you write modifications of your own for Common C++, it is your choice
00039 // whether to permit this exception to apply to your modifications.
00040 // If you do not wish that, delete this exception notice.
00041 
00047 #ifndef CCXX_OBJLINK_H
00048 #define CCXX_OBJLINK_H
00049 #include <cstddef>
00050 
00051 #ifdef  CCXX_NAMESPACES
00052 namespace ost {
00053 #endif
00054 
00063 template <class T, typename K>
00064 class objList {
00065 protected:
00066     static T* objFirst;
00067     T* objNext;
00068     const K objKey;
00069 
00070     objList(const K key)
00071     {
00072         objKey = key;
00073         objNext = objFirst;
00074         objFirst = (T *)this;
00075     }
00076 public:
00077     static T* getObject(const K& key);
00078 };
00079 
00080 template <class T, typename K>
00081 T *objList<T, K>::objFirst = NULL;
00082 
00083 template <class T, typename K>
00084 T *objList<T, K>::getObject(const K& key)
00085 {
00086     T *obj = objList<T, K>::objFirst;
00087     while(obj) {
00088         if(key == obj->objKey)
00089             break;
00090         obj = obj->objNext;
00091     }
00092     return obj;
00093 }
00094 
00095 #ifdef  CCXX_NAMESPACES
00096 }
00097 #endif
00098 
00099 #endif