--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmappcomponents/mmmtpdataprovider/mmmtpdprequestprocessor/src/cgetpartialobject.cpp	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,240 @@
+/*
+* Copyright (c) 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:  Implement the operation: GetPartialObject
+*
+*/
+
+
+#include <mtp/cmtptypefile.h>
+#include <mtp/mmtpdataproviderframework.h>
+#include <mtp/cmtpobjectmetadata.h>
+
+#include "cgetpartialobject.h"
+#include "mmmtpdplogger.h"
+#include "tmmmtpdppanic.h"
+#include "ttypeflatbuf.h"
+#include "mmmtpdpconfig.h"
+
+/**
+* Verification data for the GetPartialObject request
+*/
+const TMTPRequestElementInfo KMTPGetPartialObjectPolicy[] =
+    {
+        {TMTPTypeRequest::ERequestParameter1, EMTPElementTypeObjectHandle, EMTPElementAttrFile, 0, 0, 0}
+    };
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::NewL
+// Two-phase construction method
+// -----------------------------------------------------------------------------
+//
+EXPORT_C MMmRequestProcessor* CGetPartialObject::NewL( MMTPDataProviderFramework& aFramework,
+    MMTPConnection& aConnection,
+    MMmMtpDpConfig& aDpConfig )
+    {
+    CGetPartialObject* self = new (ELeave) CGetPartialObject( aFramework, aConnection );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::~CGetPartialObject()
+// Destructor
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CGetPartialObject::~CGetPartialObject()
+    {
+    delete iBuffer;
+    delete iPartialData;
+    delete iFileObject;
+    }
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::CGetPartialObject
+// Standard c++ constructor
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CGetPartialObject::CGetPartialObject( MMTPDataProviderFramework& aFramework,
+    MMTPConnection& aConnection ) :
+    CRequestProcessor( aFramework,
+        aConnection,
+        sizeof( KMTPGetPartialObjectPolicy ) / sizeof( TMTPRequestElementInfo ),
+        KMTPGetPartialObjectPolicy ),
+    iFramework ( aFramework ),
+    iFs( iFramework.Fs() ),
+    iBufferPtr8( NULL, 0 )
+    {
+    PRINT( _L( "Operation: GetPartialObject(0x101B)" ) );
+    }
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::CheckRequestL
+// Check the GetPartialObject reqeust
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TMTPResponseCode CGetPartialObject::CheckRequestL()
+    {
+    PRINT( _L( "MM MTP => CGetPartialObject::CheckRequestL" ) );
+    TMTPResponseCode result = CRequestProcessor::CheckRequestL();
+    if( result == EMTPRespCodeOK && !VerifyParametersL() )
+        {
+        result = EMTPRespCodeInvalidParameter;
+        }
+
+    PRINT1( _L( "MM MTP <= CGetPartialObject::CheckRequestL result = ox%x" ), result );
+    return result;
+    }
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::VerifyParametersL
+// Verify if the parameter of the request (i.e. offset) is good.
+// -----------------------------------------------------------------------------
+//
+TBool CGetPartialObject::VerifyParametersL()
+    {
+    PRINT( _L( "MM MTP => CGetPartialObject::VerifyParametersL" ) );
+    __ASSERT_DEBUG( iRequestChecker, Panic( EMmMTPDpRequestCheckNull ) );
+    TBool result = EFalse;
+    iObjectHandle = Request().Uint32( TMTPTypeRequest::ERequestParameter1 );
+    PRINT1( _L( "MM MTP <> CGetPartialObject::VerifyParametersL iObjectHandle = 0x%x" ), iObjectHandle );
+    iOffset = Request().Uint32( TMTPTypeRequest::ERequestParameter2 );
+    PRINT1( _L( "MM MTP <> CGetPartialObject::VerifyParametersL iOffset = %d" ), iOffset );
+    TUint32 maxLength = Request().Uint32( TMTPTypeRequest::ERequestParameter3 );
+    PRINT1( _L( "MM MTP <> CGetPartialObject::VerifyParametersL maxLength = %d" ), maxLength );
+
+    //get object info, but do not have the ownship of the object
+    CMTPObjectMetaData* objectInfo = iRequestChecker->GetObjectInfo( iObjectHandle );
+    __ASSERT_DEBUG( objectInfo, Panic( EMmMTPDpObjectNull ) );
+
+    const TDesC& suid( objectInfo->DesC( CMTPObjectMetaData::ESuid ) );
+    PRINT1( _L( "MM MTP <> CGetPartialObject::VerifyParametersL suid = %S" ), &suid );
+
+    if ( objectInfo->Uint( CMTPObjectMetaData::EDataProviderId )
+        == iFramework.DataProviderId() )
+        result = ETrue;
+
+    TEntry fileEntry;
+    User::LeaveIfError( iFs.Entry( suid, fileEntry ) );
+    TInt64 fileSize = fileEntry.iSize;
+    if( ( iOffset < fileEntry.iSize ) && result )
+        {
+        if ( maxLength == fileSize )
+            {
+            iCompleteFile = ETrue;
+            }
+
+        if( iOffset + maxLength > fileSize )
+            {
+            maxLength = fileSize - iOffset;
+            }
+        iPartialDataLength = maxLength;
+        result = ETrue;
+        }
+    PRINT1( _L( "MM MTP <> CGetPartialObject::VerifyParametersL iPartialDataLength = %d" ), iPartialDataLength );
+
+    PRINT1( _L( "MM MTP <= CGetPartialObject::VerifyParametersL result = %d" ), result );
+    return result;
+    }
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::ServiceL
+// GetPartialObject request handler
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CGetPartialObject::ServiceL()
+    {
+    PRINT( _L( "MM MTP => CGetPartialObject::ServiceL" ) );
+    // Get file information
+    CMTPObjectMetaData* objectInfo = iRequestChecker->GetObjectInfo( iObjectHandle );
+    __ASSERT_DEBUG( objectInfo, Panic( EMmMTPDpObjectNull ) );
+    iFileSuid.SetLength( 0 );
+    iFileSuid.Append( objectInfo->DesC( CMTPObjectMetaData::ESuid ) );
+
+    if ( iCompleteFile )
+        {
+        // Pass the complete file back to the host
+        delete iFileObject;
+        iFileObject = NULL;
+        iFileObject = CMTPTypeFile::NewL( iFramework.Fs(), iFileSuid, EFileRead );
+        SendDataL( *iFileObject );
+        }
+    else
+        {
+        // Send partial file fragment back.
+        BuildPartialDataL();
+        delete iPartialData;
+        iPartialData = NULL;
+        iPartialData  = new (ELeave) TMTPTypeFlatBuf( iBufferPtr8 );
+        SendDataL( *iPartialData );
+        }
+    PRINT( _L( "MM MTP <= CGetPartialObject::ServiceL" ) );
+    }
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::DoHandleResponsePhaseL
+// Signal to the initiator how much data has been sent
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TBool CGetPartialObject::DoHandleResponsePhaseL()
+    {
+    PRINT( _L( "MM MTP => CGetPartialObject::DoHandleResponsePhaseL" ) );
+    TUint32 dataLength = iPartialDataLength;
+    PRINT1( _L( "MM MTP <> CGetPartialObject::DoHandleResponsePhaseL dataLength = %d" ), dataLength );
+    SendResponseL( EMTPRespCodeOK, 1, &dataLength );
+    PRINT( _L( "MM MTP <= CGetPartialObject::DoHandleResponsePhaseL" ) );
+    return EFalse;
+    }
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::ConstructL()
+// Second-phase construction
+// -----------------------------------------------------------------------------
+//
+void CGetPartialObject::ConstructL()
+    {
+    SetPSStatus();
+    }
+
+// -----------------------------------------------------------------------------
+// CGetPartialObject::BuildPartialDataL()
+// Populate the partial data object
+// -----------------------------------------------------------------------------
+//
+void CGetPartialObject::BuildPartialDataL()
+    {
+    PRINT( _L( "MM MTP => CGetPartialObject::BuildPartialDataL" ) );
+    __ASSERT_DEBUG( iRequestChecker, Panic( EMmMTPDpRequestCheckNull ) );
+
+    if ( iBuffer )
+        {
+        delete iBuffer;
+        iBuffer = NULL;
+        }
+
+    // We might fail if we have insufficient memory...
+    iBuffer = HBufC8::NewL( iPartialDataLength );
+    iBuffer->Des().Zero();
+    iBufferPtr8.Set( iBuffer->Des() );
+
+    RFile file;
+    User::LeaveIfError( file.Open( iFs, iFileSuid, EFileRead ) );
+    CleanupClosePushL( file ); // + file
+    User::LeaveIfError( file.Read( iOffset, iBufferPtr8, iPartialDataLength ) );
+    CleanupStack::PopAndDestroy( &file ); // - file
+    PRINT( _L( "MM MTP <= CGetPartialObject::BuildPartialDataL" ) );
+    }
+
+// end of file