/*
* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). 
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:  Header of FileAccess Classes.
*
*/

#ifndef __FILE_ACCESS_H__
#define __FILE_ACCESS_H__

#include <caf/content.h>
#include <caf/data.h>
#include <mmf/common/mmcaf.h>

// Abstract class providing generic file access
class MGenericFile
    {
    public:
        virtual ~MGenericFile();
        
        virtual TInt Seek(TSeek aSeekMode, TInt aPosition)=0;
        virtual TInt Read(TDes8& aDes,TInt aLength)=0;
        virtual void Read(TDes8& aDes, TInt aLength, TRequestStatus& aStatus)=0;
        
        virtual TInt Write(const TDesC8& aDes,TInt aLength)=0;
        virtual void Write(const TDesC8& aDes, TInt aLength, TRequestStatus& aStatus)=0;
        
        virtual TInt Size(TInt& aSize)=0;
        virtual TInt SetSize(TInt aSize)=0;
        
        virtual TInt EvaluateIntent(const ContentAccess::TIntent aIntent) const = 0;
        virtual TInt ExecuteIntent(const ContentAccess::TIntent aIntent) = 0;
        virtual TBool IsProtected()const = 0;
        
        // legacy file support
        virtual RFile& FileL()=0;
        
        virtual TInt SetAgentProperty(ContentAccess::TAgentProperty aProperty, TInt aValue) = 0;
        
    };

// Provide RFile based file access
class CF32File : public CBase, public MGenericFile
    {
    public:
        static CF32File* NewL(RFs& aSession, TDesC& aPath, TUint aMode);	
        static CF32File* NewL(RFile& aFile);	
        void ConstructL(RFile& aFile);
        void ConstructL(RFs& aSession, TDesC& aPath, TUint aMode);
        
        virtual ~CF32File();
        
        // from MGenericFile
        virtual TInt Seek(TSeek aSeekMode, TInt aPosition);
        virtual TInt Read(TDes8& aDes,TInt aLength);
        virtual void Read(TDes8& aDes, TInt aLength, TRequestStatus& aStatus);
        virtual TInt Write(const TDesC8& aDes,TInt aLength);
        virtual void Write(const TDesC8& aDes, TInt aLength, TRequestStatus& aStatus);
        virtual TInt Size(TInt& aSize);
        virtual TInt SetSize(TInt aSize);
        virtual TInt EvaluateIntent(const ContentAccess::TIntent aIntent) const;
        virtual TInt ExecuteIntent(const ContentAccess::TIntent aIntent);
        virtual TBool IsProtected() const;
        virtual RFile& FileL();
        
        virtual TInt SetAgentProperty(ContentAccess::TAgentProperty, TInt aValue);
        
    private:
        CF32File();
        
    private:
        RFs* iSession;	// not owned
        HBufC* iFilePath;
        RFile iFile;
        
        TBool iFileHandle;
        TInt iFileSize;
    };

// Provides content access framework based file access
class CContentFile : public CBase, public MGenericFile
    {
    public:
        static CContentFile* NewL(RFs& aSession, const TDesC& aPath, const TDesC& aUniqueId, TUint aMode, TBool aEnableUI);
        void ConstructL(RFs& aSession, const TDesC& aPath, const TDesC& aUniqueId, TUint aMode, TBool aEnableUI);
        
        static CContentFile* NewL(RFile& aFile, const TDesC& aUniqueId, TBool aEnableUI);
        void ConstructL(RFile& aFile, const TDesC& aUniqueId, TBool aEnableUI);
        
        virtual ~CContentFile();
        
        // from MGenericFile
        virtual TInt Seek(TSeek aSeekMode, TInt aPosition);
        virtual TInt Read(TDes8& aDes,TInt aLength);
        virtual void Read(TDes8& aDes, TInt aLength, TRequestStatus& aStatus);
        virtual TInt Write(const TDesC8& aDes,TInt aLength);
        virtual void Write(const TDesC8& aDes, TInt aLength, TRequestStatus& aStatus);
        virtual TInt Size(TInt& aSize);
        virtual TInt SetSize(TInt aSize);
        virtual TInt EvaluateIntent(const ContentAccess::TIntent aIntent) const;
        virtual TInt ExecuteIntent(const ContentAccess::TIntent aIntent);
        virtual TBool IsProtected() const;
        virtual RFile& FileL();
        
        virtual TInt SetAgentProperty(ContentAccess::TAgentProperty, TInt aValue);
        
    private:
        CContentFile();
        
        
    private:
        RFs* iSession; // not owned
        HBufC* iFilePath;
        ContentAccess::CData* iData;
        
        RFile iLegacyFile;
        TBool iLegacyFileOpen;
    };


inline CF32File::CF32File() 
    {
    }

inline CContentFile::CContentFile() 
    {
    }

inline MGenericFile::~MGenericFile()
    {
    }

#endif //__FILE_ACCESS_H__