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objlink.h

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00001 // Copyright (C) 2001-2005 Open Source Telecom Corporation.
00002 // Copyright (C) 2006-2008 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 
00048 #include <cstddef>
00049 
00050 namespace ost {
00051 
00060 template <class T, typename K>
00061 class objList {
00062 protected:
00063         static T* objFirst;
00064         T* objNext;
00065         const K objKey;
00066 
00067         objList(const K key) 
00068         {
00069                 objKey = key;
00070                 objNext = objFirst;
00071                 objFirst = (T *)this;
00072         }
00073 public:
00074         static T* getObject(const K& key);
00075 };
00076 
00077 template <class T, typename K>
00078 T *objList<T, K>::objFirst = NULL;
00079 
00080 template <class T, typename K>
00081 T *objList<T, K>::getObject(const K& key)
00082 {
00083         T *obj = objList<T, K>::objFirst;
00084         while(obj) {
00085                 if(key == obj->objKey)
00086                         break;
00087                 obj = obj->objNext;
00088         }
00089         return obj;
00090 }
00091 
00092 }

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