--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devicediagnosticsfw/diagframework/inc/diaglogeventeraser.h	Wed Sep 01 12:27:42 2010 +0100
@@ -0,0 +1,176 @@
+/*
+* Copyright (c) 2007 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:  This is the header for the Diagnostics Logs Event Eraser.
+*
+*/
+
+
+#ifndef DIAGLOGEVENTERASER_H
+#define DIAGLOGEVENTERASER_H
+
+// Include Files
+#include <e32base.h>                    // CActive
+#include <f32file.h>                    // RFs
+
+// Forward Declarations
+class MDiagLogEventEraserObserver;
+class CActiveSchedulerWait;
+class CLogClient;
+class CLogViewEvent;
+class CLogFilter;
+
+/**
+* Diagnostics Plugin Log Event Eraser
+*
+* This class is used to remove log events generated by diagnostics plugins.
+* Events could be anything that is logged by the system log, such as call or
+* data use records.
+*
+* @lib euser.lib
+* @lib logcli.lib 
+* @lib efsrv.lib
+* @lib flogger.lib
+*/
+NONSHARABLE_CLASS( CDiagLogEventEraser ) : public CActive
+    {
+
+public: // New functions
+
+    /**
+    * Symbian OS two-phase constructor.
+    *
+    * @param aObserver A reference to the observer for this event eraser.
+    * @param aFilter The filter to be used for log erasure.  Clients may pass
+    *                NULL for no filtering.  Ownership is transferred.
+    * @return An pointer to the new instance of CDiagLogEventEraser.
+    */
+    IMPORT_C static CDiagLogEventEraser* NewL(
+        MDiagLogEventEraserObserver& aObserver,
+        CLogFilter* aFilter = NULL );
+
+    /**
+    * Destructor.
+    */
+    IMPORT_C virtual ~CDiagLogEventEraser();
+
+    /**
+    * This gets the filter used for the log erasure.  Clients which want to
+    * filter the logs to be erased must call this function and set the
+    * appropriate filter before calling StartAsyncEraseLogsL or EraseLogsL.
+    *
+    * @return The filter to apply to the logs to check for erasure.
+    */
+    IMPORT_C CLogFilter& Filter();
+
+    /**
+    * This gets the log client used for the log erasure.
+    *
+    * @return The log client used for log erasure.
+    */
+    IMPORT_C CLogClient& LogClient();
+
+    /**
+    * This starts an asynchronous log erase operation.  The completion of this
+    * request is notified by MDiagLogEventEraserObserver::CompleteEventEraseL.
+    */
+    IMPORT_C void StartAsyncEraseLogsL();
+
+    /**
+    * This performs a synchronous log erase operation.  The function will
+    * leave if there is any error in log erasure.
+    */
+    IMPORT_C void EraseLogsL();
+
+
+private: // New functions
+
+    /**
+    * C++ default constructor.
+    *
+    * @param aObserver A reference to the observer for this event eraser.
+    * @param aFilter The filter to be used for log erasure.  If NULL is
+    *                passed, a new filter will be created during the second
+    *                phase of construction.  Ownership is transferred.
+    */
+    CDiagLogEventEraser( MDiagLogEventEraserObserver& aObserver,
+                         CLogFilter* aFilter );
+    
+    /**
+    * Symbian OS default constructor.
+    */
+    void ConstructL();
+
+    /**
+    * Handles the completion of log erasing and performs different operations
+    * depending on whether the erasing was asynchronous or not.
+    */
+    void HandleCompletionL( TInt aError );
+
+
+private: // From base class CActive
+
+    /**
+    * Handle active object completion event.
+    */
+    virtual void RunL();
+
+    /**
+    * Handle active object cancel event.
+    */
+    virtual void DoCancel();
+
+
+private: // Data
+
+    /** The state of the log erasing operation. */
+    enum TDiagLogEventEraserState
+        {
+        EStateInitial = 0,
+        EStateApplyingFilter,
+        EStateReadingEntries,
+        EStateDeletingEntry,
+        EStateComplete
+        };
+
+    /** The observer for this instance of the log event eraser. */
+    MDiagLogEventEraserObserver& iObserver;
+
+    /** The active scheduler, used for synchronous log erasure.  Own. */
+    CActiveSchedulerWait* iWaitScheduler;
+
+    /** The Log client.  Own. */
+    CLogClient* iLogClient;
+
+    /** The Log view.  Own. */
+    CLogViewEvent* iLogView;
+
+    /** The Log filter.  Own. */
+    CLogFilter* iLogFilter;
+
+    /** A file server session used to delete the logs. */
+    RFs iFsSession;
+
+    /** The internal state of the log event eraser. */
+    TDiagLogEventEraserState iState;
+
+    /** Indicates if the log event eraser is running a synchronous delete. */
+    TBool iIsDeletingSynchronous;
+
+    /** The return code for syncronous operation. */
+    TInt iError;
+    };
+
+#endif // DIAGLOGEVENTERASER_H
+
+// End of File