upnpmediaserver/avobjects/src/upnpattribute.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:52:00 +0200
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/** @file
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* Copyright (c) 2005-2006 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:  UPnPAttribute implementation
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*
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*/
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// INCLUDE FILES
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#include "upnpattribute.h"
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#include "upnpelement.h"
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// ============================ MEMBER FUNCTIONS ===============================
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::ConstructL
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// Symbian 2nd phase constructor can leave.
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// -----------------------------------------------------------------------------
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//
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void CUpnpAttribute::ConstructL(const TDesC8& aName)
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{
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    iName = aName.AllocL();
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    iValue = KNullDesC8().AllocL();
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}
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::NewLC
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// Two-phased constructor.
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// -----------------------------------------------------------------------------
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//
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EXPORT_C CUpnpAttribute* CUpnpAttribute::NewLC(const TDesC8& aName)
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{
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    CUpnpAttribute* self = new( ELeave ) CUpnpAttribute;
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    CleanupStack::PushL( self );
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    self->ConstructL(aName);
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    return self;
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}
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::NewLC
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// Two-phased constructor.
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// -----------------------------------------------------------------------------
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//
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EXPORT_C CUpnpAttribute* CUpnpAttribute::NewL(const TDesC8& aName)
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{
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    CUpnpAttribute* self = NewLC(aName);
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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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// CUpnpAttribute::CUpnpAttribute
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// C++ default constructor can NOT contain any code, that
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// might leave.
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// -----------------------------------------------------------------------------
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//
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EXPORT_C CUpnpAttribute::CUpnpAttribute()
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    {
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    }
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// Destructor
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CUpnpAttribute::~CUpnpAttribute()
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    {
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    delete iName;
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    delete iValue;	
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    }
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::SetNameL
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// Sets name for the attribute.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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//
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EXPORT_C void CUpnpAttribute::SetNameL( const TDesC8& aName )
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    {
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    HBufC8* tmp = aName.AllocL();
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    delete iName;
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    iName = tmp;    
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    }
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::Name
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// Returns name of the attribute. If null, returns KNullDesC
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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//
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EXPORT_C const TDesC8& CUpnpAttribute::Name() const
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    {
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    return *iName;   
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    }
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::SetValueL
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// Sets scope for the attribute.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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//
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EXPORT_C void CUpnpAttribute::SetValueL( const TDesC8& aValue )
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    {
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    HBufC8* tmp = aValue.AllocL();
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    delete iValue;
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    iValue = tmp;
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    }
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::Value
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// Returns scope of the attribute. If null, returns KNullDesC
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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//
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EXPORT_C const TDesC8& CUpnpAttribute::Value() const
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    {
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    return *iValue;
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    }
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::ExternalizeL
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// C++ default constructor can NOT contain any code, that
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// might leave.
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// -----------------------------------------------------------------------------
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//
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void CUpnpAttribute::ExternalizeL( RWriteStream& aStream ) const
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    {
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	TInt ExternalizationLength = MapItemNameToProperLength(*iName);
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	SafeExternalizeL(aStream, *iName, KMaxUpnpObjStringLen);
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	SafeExternalizeL(aStream, *iValue, ExternalizationLength);
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    }
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::InternalizeL
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// C++ default constructor can NOT contain any code, that
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// might leave.
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// -----------------------------------------------------------------------------
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//
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void CUpnpAttribute::InternalizeL( RReadStream& aStream )
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    {
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    delete iName;
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    iName = NULL;
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    iName = HBufC8::NewL( aStream, KMaxUpnpObjStringLen );
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	TInt InternalizationLength = MapItemNameToProperLength(*iName);
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    delete iValue;
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    iValue = NULL;
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    iValue = HBufC8::NewL( aStream, InternalizationLength );
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    }
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::SafeExternalizeL
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// Writes safely aNumber of characters from the content to the stream.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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//
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void CUpnpAttribute::SafeExternalizeL(RWriteStream& aStream, const TDesC8& aDesc, const TInt aNumber) const
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{	
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    if( aDesc.Length() > aNumber )    
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		aStream << aDesc.Mid(0, aNumber);
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    else
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		aStream << aDesc;    
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}	
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// -----------------------------------------------------------------------------
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// CUpnpAttribute::MapItemNameToProperLength
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// Counts how many bytes will be used for internalization
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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//
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TInt CUpnpAttribute::MapItemNameToProperLength(TDesC8& aItemName) const
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{
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	// Requirement [7.3.17.4]: The following metadata properties must not exceed 256 bytes each in the XML-escaped form encoded in UTF-8:
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	// - All length-unlimited DIDL-Lite schema defined attributes for <res>, except res@importUri.
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	if( aItemName == _L8("importUri") )
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    {
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		return KMaxUpnpObjLongStringLen; //1024		
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    }	
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	else if( aItemName == _L8("duration") ||
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			 aItemName == _L8("size") ||
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		     aItemName == _L8("resolution") ||
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		 	 aItemName == _L8("childCount")
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	)
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	{						
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		return KMaxUpnpObjStringLen; // 256
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	}
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	else
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	{
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		return KMaxUpnpObjStringLen; // 256
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	}
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}
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//  End of File