1 /*

     2 * Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Channel for writer to inform about state changes to observer

    15 *

    16 */

    17 

    18 

    19 #ifndef __MCALOGGERWRITEOBSERVER_H__

    20 #define __MCALOGGERWRITEOBSERVER_H__

    21 

    22 //INCLUDES

    23 

    24 #include "PrivateDefinitions.h"

    25 

    26 //	FORWARD CLASS DECLERATIONS

    27 

    28 class MCALoggerMessageHeader;

    29 class MCALoggerWriteInterface;

    30 

    31 // CLASS DECLARATION

    32 

    33 /**

    34  *  Channel for writer to inform about state changes to observer

    35  *

    36  *  @lib CALogger.dll

    37  *  @since 2.1

    38  */

    39 class MCALoggerWriteObserver

    40     {

    41     public: //Type definitions

    42 

    43 

    44     public: // Interface

    45 

    46         /**

    47          *	Add file to write buffer. Ownership of iFile transfered to observer

    48          *	@since 2.1

    49          *	@param iFile File information

    50          */

    51         virtual void AddFileL( TFileRelation aFile ) = 0;

    52 

    53         /**

    54          *	Remove file from write buffer.

    55          *	@since 2.1

    56          *	@param aWriter File to be removed is recognized with file writer pointer.

    57          */

    58         virtual void RemoveFileL( MCALoggerWriteInterface& aWriter ) = 0;

    59 

    60         /**

    61          *	Creates new filename for writer. Ownership is transfered to caller.

    62          *	@since 2.1

    63          *	@return Pointer to new filename.

    64          */

    65         virtual HBufC* CreateNewFilenameL() = 0;

    66 

    67         /**

    68          *	Checks memory situation. Check if there is enough memory to write

    69          *	file.

    70          *	@since 2.1

    71          *	@param aMemoryRequired Memory required in bytes.

    72          *	@return ETrue if there is enough memory and EFalse if not.

    73          */

    74         virtual TBool CheckMemoryL( TInt aMemoryRequired ) = 0;

    75 

    76     protected:

    77 

    78         /**

    79          * Destructor.

    80          */

    81         virtual ~MCALoggerWriteObserver() {};

    82     };

    83 

    84 #endif      // __MCALOGGERWRITEOBSERVER_H__

    85 

    86 // End of File