1 /*

     2 * Copyright (c) 2010 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: RecordIdCache

    15 *

    16 */

    17 

    18 

    19 package com.nokia.mj.impl.rms;

    20 import javax.microedition.rms.*;

    21 

    22 /**

    23  * RecordIdCache saves all record id's in the store, which is used by

    24  * record enumerations.

    25  */

    26 class RecordIdCache implements RecordListener

    27 {

    28     private int[] iRecordIds;

    29 

    30     public RecordIdCache(Rms aRms)

    31     {

    32         iRecordIds = new int[0];

    33         // cache listener must be the first RecordListener registered

    34         // so that the other listeners get up-to-date information

    35         aRms.addRecordListener(this);

    36     }

    37 

    38     public int[] getRecordIds()

    39     {

    40         if (iRecordIds.length == 0)

    41         {

    42             return null;

    43         }

    44         return iRecordIds;

    45     }

    46 

    47     public void saveRecordIds(int[] aRecordIds)

    48     {

    49         if (aRecordIds == null)

    50         {

    51             iRecordIds = new int[0];

    52         }

    53         else

    54         {

    55             iRecordIds = aRecordIds;

    56         }

    57     }

    58 

    59     public void recordAdded(RecordStore aRecordStore, int aRecordId)

    60     {

    61         removeRecordId(aRecordId);

    62         insertRecordId(aRecordId);

    63     }

    64 

    65     public void recordChanged(RecordStore aRecordStore, int aRecordId)

    66     {

    67     }

    68 

    69     public void recordDeleted(RecordStore aRecordStore, int aRecordId)

    70     {

    71         removeRecordId(aRecordId);

    72     }

    73 

    74     private void removeRecordId(int aRecordId)

    75     {

    76         for (int i = 0; i < iRecordIds.length; i++)

    77         {

    78             if (aRecordId == iRecordIds[i])

    79             {

    80                 int[] temp = new int[iRecordIds.length - 1];

    81                 System.arraycopy(iRecordIds, 0, temp, 0, i);

    82                 System.arraycopy(iRecordIds, i+1, temp, i, iRecordIds.length - i - 1);

    83                 iRecordIds = temp;

    84             }

    85         }

    86     }

    87 

    88     private void insertRecordId(int aRecordId)

    89     {

    90         int[] temp = new int[iRecordIds.length + 1];

    91         temp[0] = aRecordId;

    92         System.arraycopy(iRecordIds, 0, temp, 1, iRecordIds.length);

    93         iRecordIds = temp;

    94     }

    95 

    96 }

    97