--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mmserv/metadatautility/Src/MetaDataBufferAgg.h Tue Feb 02 01:08:46 2010 +0200
@@ -0,0 +1,130 @@
+/*
+* Copyright (c) 2008 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: Active object for MetadataUtility
+*
+*/
+
+
+#ifndef METADATABUFFERAGG_H
+#define METADATABUFFERAGG_H
+
+// INCLUDES
+#include <e32base.h>
+
+class CMetaDataUtilityBody;
+class MMDUChunkDataObserver;
+
+
+NONSHARABLE_CLASS(CMetaDataBufferAgg): public CActive
+{
+
+
+public:
+ /**
+ * Two-phased constructor.
+ * @since 9.1
+ * @param aMimeType The MIME type
+ * @param aObserver should not be NULL
+ * @return A pointer to a new instance of this class
+ */
+ static CMetaDataBufferAgg* NewL( CMetaDataUtilityBody* aBody,
+ TDesC8& aMimeType,
+ MMDUChunkDataObserver& aObserver);
+
+ /**
+ * Destructor.
+ */
+ virtual ~CMetaDataBufferAgg();
+
+ /**
+ * Process the chunk data.
+ * @since 5.1
+ * Max size of buffer passed in is N bytes for performance optimization
+ * Buffer overflow (out of memory) results in callback with error.
+ * invalid chunk data results in callback with error
+ * parsing APIs are invoked before callback is received results in 0 count or empty container
+ * parsing APIs are invoked after callback is received results in positive count and full container
+ * @param aChunk the data chunk to be processed
+ * @return error value
+ * KErrNone
+ * KErrNotReady
+ */
+ TInt RequestProcessChunkData( TDesC8& aChunk, TBool aFinalChunk );
+
+ /**
+ * Parse the chunk data.
+ * @since 5.1
+ * parsing APIs are invoked before callback is received results in 0 count or empty container
+ * parsing APIs are invoked after callback is received results in positive count and full container
+ * @return error value
+ * KErrNone
+ * KErrNotReady
+ */
+ TInt RequestParseChunkData();
+
+ void ReadyToGo();
+
+ /**
+ * Do Cancel
+ * @since 9.1
+ */
+ void DoCancel();
+
+ /**
+ * Run for Active Object
+ * @since 9.1
+ */
+ void RunL();
+
+private:
+
+private:
+ enum TAggregateState
+ {
+ EFindIdentifier,
+ ECalculateSize,
+ ECollectData,
+ EParseData,
+ EParseComplete
+ };
+
+
+ void ConstructL(const TDesC8& aMimeType );
+ CMetaDataBufferAgg( CMetaDataUtilityBody* aBody,
+ MMDUChunkDataObserver& aObserver );
+
+ void FindMetaDataIdentifierL( TDesC8* aBuf );
+ void CalculateMetaDataSizeL( TDesC8* aBuf );
+ void ComputeSize( TDesC8* aBuf, TInt aOffset );
+ void CollectMetaDataL( TDesC8* aBuf );
+ void ProcessPreviousChunkL( TDesC8* aBuf );
+ void DoCallback( TInt aError );
+ void CopyBufferL(RBuf8* aDes, TUint8* aPtr, TInt aSize );
+ void AppendBufferL(RBuf8* aDes, TUint8* aPtr, TInt aSize );
+
+
+private: // data
+ CMetaDataUtilityBody* iBody;
+ MMDUChunkDataObserver& iObserver;
+ TAggregateState iState;
+ RBuf8 iMimeType;
+ TDesC8* iUserChunk;
+ RBuf8 iPrevBuf; // to save previous data
+ RBuf8 iMetaDataBuf;
+ TBool iFinalChunk;
+ TInt iMetaDataSize;
+
+};
+
+#endif // METADATABUFFERAGG_H