--- /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