77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
/**
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* $Id$
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*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __GEN_DATACACHE_H
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#define __GEN_DATACACHE_H
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#include "STR_HashedString.h"
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#include "GEN_Map.h"
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template <class T>
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class GEN_DataCache
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{
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GEN_Map<STR_HashedString,T*> m_dataCache;
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virtual T* LoadData(const STR_String& name)=0;
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virtual void FreeCacheObjects()=0;
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public:
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GEN_DataCache() {};
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virtual ~GEN_DataCache() {};
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T* GetData(const STR_String& paramname)
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{
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T* result=NULL;
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T** resultptr = m_dataCache[paramname];
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if (resultptr)
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{
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result = *resultptr;
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}
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else
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{
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result = LoadData(paramname);
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if (result)
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{
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m_dataCache.insert(paramname,result);
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}
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}
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return result;
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}
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virtual void ClearCache()
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{
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FreeCacheObjects();
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m_dataCache.clear();
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}
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};
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#endif //__GEN_DATACACHE_H
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