mtpdataproviders/mtpimagedp/src/cmtpimagedpgetpartialobject.cpp
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// Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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/**
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 @file
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 @internalTechnology
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*/
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#include <f32file.h>
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#include <mtp/tmtptyperequest.h>
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#include <mtp/mmtpdataproviderframework.h>
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#include <mtp/mtpprotocolconstants.h>
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#include <mtp/mmtpobjectmgr.h>
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#include <mtp/cmtpobjectmetadata.h>
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#include <mtp/cmtptypefile.h>
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#include "cmtpimagedpgetpartialobject.h"
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#include "mtpimagedppanic.h"
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#include "mtpimagedpconst.h"
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#include "cmtpimagedp.h"
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#include "mtpimagedputilits.h"
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#include "cmtpimagedpobjectpropertymgr.h"
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#include "OstTraceDefinitions.h"
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#ifdef OST_TRACE_COMPILER_IN_USE
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#include "cmtpimagedpgetpartialobjectTraces.h"
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#endif
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/**
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Verification data for the GetPartialObject request
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*/
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/**
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Two-phase construction method
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@param aFramework	The data provider framework
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@param aConnection	The connection from which the request comes
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@return a pointer to the created request processor object
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*/ 
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MMTPRequestProcessor* CMTPImageDpGetPartialObject::NewL(MMTPDataProviderFramework& aFramework, MMTPConnection& aConnection,CMTPImageDataProvider& aDataProvider)
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    {
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    CMTPImageDpGetPartialObject* self = new (ELeave) CMTPImageDpGetPartialObject(aFramework, aConnection, aDataProvider);
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    CleanupStack::PushL(self);
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    self->ConstructL();
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    CleanupStack::Pop(self);
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    return self;
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    }
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/**
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Destructor
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*/	
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CMTPImageDpGetPartialObject::~CMTPImageDpGetPartialObject()
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    {
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    OstTraceFunctionEntry0( CMTPIMAGEDPGETPARTIALOBJECT_CMTPIMAGEDPGETPARTIALOBJECT_ENTRY );
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    delete iFileObject;
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    delete iObjectMeta;
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    OstTraceFunctionExit0( CMTPIMAGEDPGETPARTIALOBJECT_CMTPIMAGEDPGETPARTIALOBJECT_EXIT );
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    }
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/**
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Standard c++ constructor
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@param aFramework	The data provider framework
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@param aConnection	The connection from which the request comes
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*/	
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CMTPImageDpGetPartialObject::CMTPImageDpGetPartialObject(MMTPDataProviderFramework& aFramework, MMTPConnection& aConnection, CMTPImageDataProvider& /*aDataProvider*/)
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    :CMTPRequestProcessor(aFramework, aConnection, 0, NULL),
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    iFs(iFramework.Fs())
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    {
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    }
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/**
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Second-phase construction
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*/  
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void CMTPImageDpGetPartialObject::ConstructL()
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    {
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    OstTraceFunctionEntry0( CMTPIMAGEDPGETPARTIALOBJECT_CONSTRUCTL_ENTRY );
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    iObjectMeta = CMTPObjectMetaData::NewL();
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    OstTraceFunctionExit0( CMTPIMAGEDPGETPARTIALOBJECT_CONSTRUCTL_EXIT );
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    }
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/**
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Check the GetPartialObject reqeust
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@return EMTPRespCodeOK if the request is good, otherwise, one of the error response codes
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*/	
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TMTPResponseCode CMTPImageDpGetPartialObject::CheckRequestL()
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    {
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    OstTraceFunctionEntry0( CMTPIMAGEDPGETPARTIALOBJECT_CHECKREQUESTL_ENTRY );
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    TMTPResponseCode result = CMTPRequestProcessor::CheckRequestL();
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    if(result == EMTPRespCodeOK)
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        {
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        result = MTPImageDpUtilits::VerifyObjectHandleL(iFramework, Request().Uint32(TMTPTypeRequest::ERequestParameter1), *iObjectMeta);
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        }
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    if(result == EMTPRespCodeOK && !VerifyParametersL())
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        {
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        result = EMTPRespCodeInvalidParameter;
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        }
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    OstTrace1( TRACE_NORMAL, CMTPIMAGEDPGETPARTIALOBJECT_CHECKREQUESTL, "CheckRequestL result 0x%x", result );
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    OstTraceFunctionExit0( CMTPIMAGEDPGETPARTIALOBJECT_CHECKREQUESTL_EXIT );
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    return result;	
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    }
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/**
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Verify if the parameter of the request (i.e. offset) is good.
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@return ETrue if the parameter is good, otherwise, EFalse
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*/		
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   118
TBool CMTPImageDpGetPartialObject::VerifyParametersL()
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    {
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    OstTraceFunctionEntry0( CMTPIMAGEDPGETPARTIALOBJECT_VERIFYPARAMETERSL_ENTRY );
0
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    TBool result = EFalse;
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    iOffset = Request().Uint32(TMTPTypeRequest::ERequestParameter2);
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    iMaxLength = Request().Uint32(TMTPTypeRequest::ERequestParameter3);
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   124
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    TEntry fileEntry;
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    LEAVEIFERROR(iFs.Entry(iObjectMeta->DesC(CMTPObjectMetaData::ESuid), fileEntry),
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            OstTraceExt2( TRACE_ERROR, DUP1_CMTPIMAGEDPGETPARTIALOBJECT_VERIFYPARAMETERSL, 
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                    "Gets the entry details for %S failed! error code %d", iObjectMeta->DesC(CMTPObjectMetaData::ESuid), munged_err));
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   129
         
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    if((iOffset < fileEntry.FileSize())) 
0
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        {
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        result = ETrue;
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   133
        }
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    OstTrace1( TRACE_NORMAL, CMTPIMAGEDPGETPARTIALOBJECT_VERIFYPARAMETERSL, 
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            "VerifyParametersL result %d", result );    
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    OstTraceFunctionExit0( CMTPIMAGEDPGETPARTIALOBJECT_VERIFYPARAMETERSL_EXIT );
0
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    return result;	
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   138
    }
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   139
/**
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GetPartialObject request handler
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   141
Send the partial object data to the initiator
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   142
*/	
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   143
void CMTPImageDpGetPartialObject::ServiceL()
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    {
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    OstTraceFunctionEntry0( CMTPIMAGEDPGETPARTIALOBJECT_SERVICEL_ENTRY );
0
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    // Get file information
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        // Pass the complete file back to the host
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    iFileObject = CMTPTypeFile::NewL(iFramework.Fs(), iObjectMeta->DesC(CMTPObjectMetaData::ESuid), (TFileMode)(EFileRead | EFileShareReadersOnly), iMaxLength, iOffset);
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    SendDataL(*iFileObject);	
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    OstTraceFunctionExit0( CMTPIMAGEDPGETPARTIALOBJECT_SERVICEL_EXIT );
0
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    }
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   152
    
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   153
    
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   154
/**
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   155
Signal to the initiator how much data has been sent
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@return EFalse
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*/
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TBool CMTPImageDpGetPartialObject::DoHandleResponsePhaseL()
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    {
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    OstTraceFunctionEntry0( CMTPIMAGEDPGETPARTIALOBJECT_DOHANDLERESPONSEPHASEL_ENTRY );
0
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    TUint32 dataLength = iFileObject->GetByteSent();
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    SendResponseL(EMTPRespCodeOK, 1, &dataLength);
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    OstTraceFunctionExit0( CMTPIMAGEDPGETPARTIALOBJECT_DOHANDLERESPONSEPHASEL_EXIT );
0
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    return EFalse;
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    }