// Copyright (c) 2006-2009 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:

//

#include <f32file.h>

#include <mtp/cmtptypefile.h>

#include <mtp/cmtpobjectmetadata.h>

#include <mtp/mmtpdataproviderframework.h>

#include <mtp/mmtpobjectmgr.h>

#include <mtp/mmtpstoragemgr.h>

#include <mtp/mtpprotocolconstants.h>

#include <mtp/tmtptyperequest.h>

#include "cmtpgetpartialobject.h"

#include "mtpdppanic.h"

// Class constants.

__FLOG_STMT(_LIT8(KComponent,"GetObject");)

/**

Verification data for the GetNumObjects request

*/

const TMTPRequestElementInfo KMTPGetPartialObjectPolicy[] = 

    {

        {TMTPTypeRequest::ERequestParameter1, EMTPElementTypeObjectHandle, EMTPElementAttrFile, 0, 0, 0}

    };

/**

Two-phase construction method

@param aPlugin	The data provider plugin

@param aFramework	The data provider framework

@param aConnection	The connection from which the request comes

@return a pointer to the created request processor object

*/     

EXPORT_C MMTPRequestProcessor* CMTPGetPartialObject::NewL(MMTPDataProviderFramework& aFramework, MMTPConnection& aConnection)

	{

	CMTPGetPartialObject* self = new (ELeave) CMTPGetPartialObject(aFramework, aConnection);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

/**

Destructor

*/	

EXPORT_C CMTPGetPartialObject::~CMTPGetPartialObject()

	{	

    __FLOG(_L8("~CMTPGetPartialObject - Entry"));

	delete iFileObject;

    __FLOG(_L8("~CMTPGetPartialObject - Exit"));

    __FLOG_CLOSE;

	}

/**

Standard c++ constructor

*/	

CMTPGetPartialObject::CMTPGetPartialObject(MMTPDataProviderFramework& aFramework, MMTPConnection& aConnection) : 

    CMTPRequestProcessor(aFramework, aConnection, sizeof(KMTPGetPartialObjectPolicy)/sizeof(TMTPRequestElementInfo), KMTPGetPartialObjectPolicy)

	{

	}

/**

Second-phase constructor.

*/        

void CMTPGetPartialObject::ConstructL()

    {

    __FLOG_OPEN(KMTPSubsystem, KComponent);

    __FLOG(_L8("ConstructL - Entry"));

    __FLOG(_L8("ConstructL - Exit"));

    }

/**

Check the GetPartialObject reqeust

@return EMTPRespCodeOK if the request is good, otherwise, one of the error response codes

*/  

TMTPResponseCode CMTPGetPartialObject::CheckRequestL()

    {

    __FLOG(_L8("CheckRequestL - Entry"));

    TMTPResponseCode result = CMTPRequestProcessor::CheckRequestL();

    if(result == EMTPRespCodeOK)

        {

        TUint32 objectHandle = Request().Uint32(TMTPTypeRequest::ERequestParameter1);

        iOffset = Request().Uint32(TMTPTypeRequest::ERequestParameter2);

        iLength = Request().Uint32(TMTPTypeRequest::ERequestParameter3);

        //does not take ownership

        iObjectInfo = iRequestChecker->GetObjectInfo(objectHandle);

        if (!iObjectInfo)

            {

            // The object handle has already been checked, so an invalid handle can

            // only occur if it was invalidated during a context switch between

            // the validation time and now.

            result = EMTPRespCodeInvalidObjectHandle;

            }

        else

            {

            TEntry fileEntry;

            User::LeaveIfError(iFramework.Fs().Entry(iObjectInfo->DesC(CMTPObjectMetaData::ESuid), fileEntry));

            if((iOffset >= fileEntry.iSize)) 

                {

                result = EMTPRespCodeInvalidParameter;

                }

            }

        }

    __FLOG(_L8("CheckRequestL - Exit"));

    return result;  

    }

/**

GetObject request handler

*/		

void CMTPGetPartialObject::ServiceL()

	{

    __FLOG(_L8("ServiceL - Entry"));

	if (!iObjectInfo)

	    {

	    SendResponseL(EMTPRespCodeInvalidObjectHandle);

	    }

    else

        {

        delete iFileObject;

        iFileObject = CMTPTypeFile::NewL(iFramework.Fs(), iObjectInfo->DesC(CMTPObjectMetaData::ESuid), EFileRead, iLength, iOffset);

    	SendDataL(*iFileObject);

        }

    __FLOG(_L8("ServiceL - Exit"));

	}

/**

Handle the response phase of the current request

@return EFalse

*/		

TBool CMTPGetPartialObject::DoHandleResponsePhaseL()

	{

    __FLOG(_L8("DoHandleResponsePhaseL - Entry"));

    __ASSERT_DEBUG(iFileObject, Panic(EMTPDpObjectNull));

    TUint32 dataLength = iFileObject->GetByteSent();

	SendResponseL(EMTPRespCodeOK, 1, &dataLength);

    __FLOG(_L8("DoHandleResponsePhaseL - Exit"));

	return EFalse;

	}