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# csutil/nulcache.h

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    00001 /*
    00002     Copyright (C) 2002 by Frank Richter
    00003
    00004     This library is free software; you can redistribute it and/or
    00005     modify it under the terms of the GNU Library General Public
    00006     License as published by the Free Software Foundation; either
    00007     version 2 of the License, or (at your option) any later version.
    00008
    00009     This library 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 GNU
    00012     Library General Public License for more details.
    00013
    00014     You should have received a copy of the GNU Library General Public
    00015     License along with this library; if not, write to the Free
    00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00017 */
    00018
    00019 #ifndef __CS_UTIL_NULCACHE_H__
    00020 #define __CS_UTIL_NULCACHE_H__
    00021
    00025 #include "csextern.h"
    00026 #include "csutil/scf_implementation.h"
    00027 #include "iutil/cache.h"
    00028
    00032 class CS_CRYSTALSPACE_EXPORT csNullCacheManager :
    00033   public scfImplementation1<csNullCacheManager, iCacheManager>
    00034 {
    00035 public:
    00039   csNullCacheManager ();
    00040
    00041   virtual ~csNullCacheManager ();
    00042
    00043
    00044   virtual void SetReadOnly (bool) { }
    00045   virtual bool IsReadOnly () const { return true; }
    00046
    00050   virtual void SetCurrentType (const char* type);
    00054   virtual const char* GetCurrentType () const { return 0; }
    00058   virtual void SetCurrentScope (const char* scope);
    00062   virtual const char* GetCurrentScope () const { return 0; }
    00066   virtual bool CacheData (const void* data, size_t size,
    00067         const char* type, const char* scope, uint32 id);
    00071   virtual csPtr<iDataBuffer> ReadCache (const char* type, const char* scope,
    00072         uint32 id);
    00076   virtual bool ClearCache (const char* type = 0, const char* scope = 0,
    00077         const uint32* id = 0);
    00081   virtual void Flush () { }
    00082 };
    00083
    00084 #endif // __CS_UTIL_NULCACHE_H__
    00085