dbindex.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
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 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
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 * The contents of this file, and the files included with this file, are 
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 * Version 1.0 (the "RPSL") available at 
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 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
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 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
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 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
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 * ***** END LICENSE BLOCK ***** */ 

#ifndef _DBINDEX_H_
#define _DBINDEX_H_

#include "hxcom.h"
#include "hxplugn.h"
#include "hxmap.h"
#include "hxguidmap.h"


// Virtual base class
class CPluginDatabaseIndex	       
{
public:
    virtual ~CPluginDatabaseIndex() {}

    virtual HX_RESULT AddItem( IHXBuffer* pData, IUnknown* pIUnknown ) =0;
    virtual HX_RESULT FindItem( const void* pData, IUnknown** pIUnknown ) =0;
    virtual HX_RESULT RemoveItem( IUnknown* pIValue ) =0;

    virtual void Reset() =0;

    static CPluginDatabaseIndex* CreateIndex( EPluginIndexType indexType );

protected:
    CPluginDatabaseIndex();
};



class CPluginDatabaseIndexGUID : public CPluginDatabaseIndex
{
public:
    CPluginDatabaseIndexGUID();
    ~CPluginDatabaseIndexGUID();

    virtual HX_RESULT AddItem( IHXBuffer* pData, IUnknown* pIUnknown );
    virtual HX_RESULT FindItem( const void* pData, IUnknown** pIUnknown );
    virtual HX_RESULT RemoveItem( IUnknown* pIValue );

    virtual void Reset();

private:
    CHXMapGUIDToObj m_mapGUIDToIUnknown;
};



class CPluginDatabaseIndexString : public CPluginDatabaseIndex
{
public:
    CPluginDatabaseIndexString();
    ~CPluginDatabaseIndexString();

    virtual HX_RESULT AddItem( IHXBuffer* pData, IUnknown* pIUnknown );
    virtual HX_RESULT FindItem( const void* pData, IUnknown** pIUnknown );
    virtual HX_RESULT RemoveItem( IUnknown* pIValue );

    virtual void Reset();

private:
    CHXMapStringToOb m_mapStrToIUnknown;
};




#endif	// _DBINDEX_H_