1 /*

     2 * Copyright (c) 2008-2009 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:  Header file for JavaVersionBackupUtil class

    15 *

    16 */

    17 

    18 

    19 #ifndef JAVAVERSIONBACKUPUTIL_H

    20 #define JAVAVERSIONBACKUPUTIL_H

    21 

    22 #include <e32base.h>

    23 #include <driveinfo.h>

    24 #include <javaenvinfo.h>

    25 

    26 class RDesReadStream;

    27 class RDesWriteStream;

    28 

    29 namespace java

    30 {

    31 namespace backup

    32 {

    33 /**

    34  *  JavaVersionBackupUtil class is used for checking the java version

    35  *  during a B&R operation. This class writes the current java version

    36  *  while backing up and then checks whether the backed up version

    37  *  is compatible with the currnet version while doing a restore.

    38  *  If it is not compatible, then the backup process is gracefully exited.

    39  */

    40 

    41 class JavaVersionBackupUtil

    42 {

    43 

    44 public:

    45 

    46     /**

    47      * This method writes the current java version into the SBE buffer.

    48      * This functions is called when a backup process is started.

    49      *

    50      * @param aBuffer the buffer which is sent by the SBE

    51      */

    52     static void WriteJavaVersionL(RDesWriteStream& aStream);

    53 

    54     /**

    55      * This method reads the java version from the stream. If there is no

    56      * Java version or if the Java version is not compatible with the

    57      * current version, then the restore process is exited gracefully.

    58      *

    59      * @param aStream an RDesReadStream on the buffer which is sent

    60      *        by the SBE

    61      * @param aDrive current drive to be backed up

    62      * @return status

    63      */

    64     static TUint CheckJavaVersionL(RDesReadStream& aStream, TDriveNumber aDrive, TBool versionCheck);

    65 

    66 private:

    67 

    68     /**

    69      * This method is used to compare the current java version with the

    70      * one read from the stream.

    71      * This method is not used presently. Logic may be added in the future

    72      *

    73      * @param aVersion the java version read from the stream

    74      * @param aCurVersion the current java version

    75      */

    76     void CompareL(TVersion aVersion, TVersion aCurVersion);

    77 

    78 };

    79 

    80 } // namespace backup

    81 } // namespace java

    82 

    83 #endif // JAVAVERSIONBACKUPUTIL_H