--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmappcomponents/harvester/filehandler/inc/mpxmetadatascanner.h	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,176 @@
+/*
+* Copyright (c) 2006 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:  Scans metadata for new files, updated files
+*
+*/
+
+
+#ifndef CMPXMETADATASCANNER_H
+#define CMPXMETADATASCANNER_H
+
+#include <e32base.h>
+
+class CMPXMedia;
+class CMPXMediaArray;
+class CMPXCollectionType;
+class CMPXMetadataExtractor;
+class MMPXMetadataScanObserver;
+class MMPXFileScanStateObserver;
+ 
+enum TExtractType
+    {
+    ENewFiles = 0,
+    EModFiles = 1,
+    EMaxFile  = 2
+    };   
+/**
+ *  CMPXMetadataScanner
+ *
+ *  Extracts metadata from a list of files
+ *
+ *  @lib mpxfilehandler.lib
+ *  @since S60 3.0
+ */
+NONSHARABLE_CLASS( CMPXMetadataScanner ): public CActive
+    {
+public:
+
+    /**
+    * Two phased constructor
+    * @param aFs file server session
+    * @param aAppArc apparc session
+    * @param aTypesAry supported file types array
+    * @param aObs metadata scanning observer
+    * @param aStateObs scanning state observer
+    * @return new instance of CMPXMetadataScanner
+    */
+    static CMPXMetadataScanner* NewL( RFs& aFs, 
+                                      RApaLsSession& aAppArc,
+                                      RPointerArray<CMPXCollectionType>& aTypesAry,
+                                      MMPXMetadataScanObserver& aObs,
+                                      MMPXFileScanStateObserver& aStateObs );
+
+    /**
+    * Two phased constructor
+    * @param aFs file server session
+    * @param aAppArc apparc session
+    * @param aTypesAry supported file types array
+    * @param aObs metadata scanning observer
+    * @param aStateObs scanning state observer
+    * @return new instance of CMPXMetadataScanner
+    */
+    static CMPXMetadataScanner* NewLC( RFs& aFs,
+                                       RApaLsSession& aAppArc, 
+                                       RPointerArray<CMPXCollectionType>& aTypesAry,
+                                       MMPXMetadataScanObserver& aObs,
+                                       MMPXFileScanStateObserver& aStateObs );
+
+    /**
+    * Virtual destructor
+    */
+    virtual ~CMPXMetadataScanner();
+
+public: // New Functions 
+
+    /**
+    * Frees all memory allocated
+    */
+    void Reset();
+    
+    /**
+    * Extracts metadata for the files in the file list
+    */
+    void Start();
+
+    /**
+    * Stops extraction of metadata for the files in the file list
+    */
+    void Stop();
+
+    /**
+    * Adds a new file to the scanning list
+    * @param aFile file path to add to scan
+    */
+    void AddNewFileToScanL( const TDesC& aFile );
+    
+    /**
+    * Adds a modified file to the scanning list
+    * @param aFile file path to add to scan
+    */
+    void AddModifiedFileToScanL( const TDesC& aFile );
+    
+    /**
+    * Extract the Media properties for a file
+    * @param aFile file path to extract metadata
+    * @return CMPXMedia* media for the file, ownership transferred
+    */
+    CMPXMedia* ExtractFileL( const TDesC& aFile );
+    
+protected: // From base class
+    
+    /**
+    * From CActive
+    */
+    void DoCancel();
+    
+    /**
+    * From CActive
+    */
+    void RunL();
+
+private: // New Functions
+    
+    /**
+    * Extract metadata from a few files
+    * @return ETrue if there are no more files to extract
+    *         EFalse otherwise
+    */
+    TBool DoExtractL(); 
+        
+private:
+
+    /**
+    * Private Constructor
+    * @param aObs metadata scanning observer
+    * @param aStateObs scanning state observer
+    */
+    CMPXMetadataScanner( MMPXMetadataScanObserver& aObs,
+                         MMPXFileScanStateObserver& aStateObs );
+    
+    /**
+    * 2nd phase constructor
+    * @param aAppArc apparc session
+    * @param aTypesAry supported file types array
+    */
+    void ConstructL( RFs& aFs, RApaLsSession& aAppArc,
+                     RPointerArray<CMPXCollectionType>& aTypesAry );
+
+private: // data
+    RPointerArray<HBufC>  iNewFiles;
+    RPointerArray<HBufC>  iModifiedFiles;
+ 
+    CMPXMediaArray* iNewFileProps;
+    CMPXMediaArray* iModifiedFileProps;
+    
+    TBool iExtracting;          // Are we extracting
+    TInt  iExtractType; // What are we extracting
+    TInt  iAryPos;              // Current array position
+    
+    CMPXMetadataExtractor* iExtractor;  // Metadata Utilities wrapper
+    
+    MMPXMetadataScanObserver& iObserver;
+    MMPXFileScanStateObserver& iStateObserver;   
+    };
+
+#endif // CMPXMETADATASCANNER_H