omads/omadsextensions/adapters/bookmark/src/changefinder.cpp
changeset 40 b63e67867dcd
equal deleted inserted replaced
39:9905f7d46607 40:b63e67867dcd
       
     1 /*
       
     2 * Copyright (c) 2007 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:  Part of SyncML Data Synchronization Plug In Adapter
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 #include "changefinder.h"
       
    20 #include "logger.h"
       
    21 
       
    22 const TUint KSnapshotFormatVersion ( 0xf0000001 ); // format version
       
    23 // -----------------------------------------------------------------------------
       
    24 // CChangeFinder::NewL
       
    25 // Static function to create CChangeFider object(s)
       
    26 // -----------------------------------------------------------------------------
       
    27 CChangeFinder* CChangeFinder::NewL( MSmlSyncRelationship& aSyncRelationship, TKeyArrayFix aKey,
       
    28         TBool& aHasHistory, TInt aStreamUid )
       
    29     {
       
    30     CChangeFinder* self = new (ELeave) CChangeFinder( aSyncRelationship, aKey, aStreamUid );
       
    31     CleanupStack::PushL( self );
       
    32     self->ConstructL( aHasHistory );
       
    33     CleanupStack::Pop( self );
       
    34     return self;
       
    35     }
       
    36 
       
    37 // -----------------------------------------------------------------------------
       
    38 // CChangeFinder::CChangeFinder
       
    39 // Constructor for the class
       
    40 // -----------------------------------------------------------------------------
       
    41 CChangeFinder::CChangeFinder( MSmlSyncRelationship& aSyncRelationship, TKeyArrayFix aKey, TInt aStreamUid ) :
       
    42 iSyncRelationship( aSyncRelationship ),
       
    43 iKey( aKey ),
       
    44 iStreamUid( aStreamUid ),
       
    45 iDataStoreUid( KErrNotFound )
       
    46     {
       
    47     
       
    48     }
       
    49 
       
    50 // -----------------------------------------------------------------------------
       
    51 // CChangeFinder::~CChangeFinder
       
    52 // Destructor for the class, closes the ChangeFinder and writes snapshot to stream
       
    53 // -----------------------------------------------------------------------------
       
    54 CChangeFinder::~CChangeFinder()
       
    55     {
       
    56     LOGGER_ENTERFN( "CChangeFinder::~CChangeFinder" );
       
    57     delete iOldSnapshot;
       
    58 	delete iCurrentSnapshot;
       
    59     LOGGER_LEAVEFN( "CChangeFinder::~CChangeFinder" );
       
    60     }
       
    61 
       
    62 // -----------------------------------------------------------------------------
       
    63 // CChangeFinder::ConstructL
       
    64 // 2nd phase constructor for the class, reads snapshot from stream
       
    65 // -----------------------------------------------------------------------------
       
    66 void CChangeFinder::ConstructL( TBool& aHasHistory )
       
    67     {
       
    68     LOGGER_ENTERFN( "CChangeFinder::ConstructL" );
       
    69     iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
       
    70 	iCurrentSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
       
    71     LOGGER_WRITE("CChangeFinder::ConstructL, CSnapshotArray:s created");
       
    72     TUid uid = {iStreamUid};
       
    73     
       
    74     aHasHistory = iSyncRelationship.IsStreamPresentL( uid );
       
    75     
       
    76     if ( aHasHistory )
       
    77         {
       
    78         LOGGER_WRITE("CChangeFinder::ConstructL, HasHistory");
       
    79         // Open stream for reading
       
    80         RReadStream readStream;
       
    81         iSyncRelationship.OpenReadStreamLC( readStream, uid );
       
    82         
       
    83         // Read used format version
       
    84         TUint formatVer = readStream.ReadUint32L();
       
    85         if ( formatVer != KSnapshotFormatVersion )
       
    86             {
       
    87             // Wrong version, do not try to import data
       
    88             LOGGER_WRITE("CChangeFinder::ConstructL, Wrong format version -> no history");
       
    89             aHasHistory = EFalse;
       
    90             CleanupStack::PopAndDestroy( &readStream );
       
    91             LOGGER_LEAVEFN("CChangeFinder::ConstructL");
       
    92             return;
       
    93             }
       
    94         else
       
    95             {
       
    96             LOGGER_WRITE("CChangeFinder::ConstructL, format is OK");
       
    97             }
       
    98         
       
    99         // Read item count
       
   100         TInt count = readStream.ReadUint32L();
       
   101         
       
   102         // Read items
       
   103         for ( TInt i=0; i<count; i++ )
       
   104             {
       
   105             TSnapshotItem item;
       
   106             item.InternalizeL( readStream );
       
   107             iOldSnapshot->InsertIsqL( item, iKey );
       
   108             }
       
   109         iOldSnapshot->Compress();
       
   110         
       
   111         LOGGER_WRITE_1("iOldSnapshot done, iOldSnapshot->Count: %d", iOldSnapshot->Count() );
       
   112         CleanupStack::PopAndDestroy( &readStream ); // readStream
       
   113         }
       
   114     else
       
   115         {
       
   116         LOGGER_WRITE("CChangeFinder::ConstructL, no sync history.");
       
   117         }
       
   118         
       
   119     LOGGER_LEAVEFN("CChangeFinder::ConstructL");
       
   120     }
       
   121 
       
   122 // -----------------------------------------------------------------------------
       
   123 // CChangeFinder::CloseL
       
   124 // Closes ChangeFinder object and writes snapshot to stream
       
   125 // -----------------------------------------------------------------------------
       
   126 void CChangeFinder::CloseL()
       
   127     {
       
   128     LOGGER_ENTERFN( "CChangeFinder::CloseL" );
       
   129      
       
   130     RWriteStream writeStream;
       
   131     
       
   132     TUid uid = {iStreamUid};
       
   133     
       
   134     // Open write stream
       
   135     iSyncRelationship.OpenWriteStreamLC( writeStream, uid );
       
   136     
       
   137     // Write used format version
       
   138     writeStream.WriteUint32L( KSnapshotFormatVersion );
       
   139     
       
   140     // Write item count
       
   141     TInt count = iOldSnapshot->Count();
       
   142     writeStream.WriteUint32L( count );
       
   143     
       
   144     // Write items
       
   145     for ( TInt i = 0; i < count; i++ )
       
   146         {
       
   147         const TSnapshotItem& item = iOldSnapshot->At( i );
       
   148         item.ExternalizeL( writeStream );
       
   149         }
       
   150     
       
   151     writeStream.CommitL();
       
   152     CleanupStack::PopAndDestroy( &writeStream ); // writeStream
       
   153     
       
   154     LOGGER_LEAVEFN( "CChangeFinder::CloseL" );
       
   155     }
       
   156 
       
   157 // -----------------------------------------------------------------------------
       
   158 // CChangeFinder::ResetL
       
   159 // Resets synchronization history, all contetn is considered new after this call
       
   160 // -----------------------------------------------------------------------------
       
   161 void CChangeFinder::ResetL()
       
   162     {
       
   163     LOGGER_ENTERFN( "CChangeFinder::ResetL" );
       
   164     if ( iOldSnapshot )
       
   165         {
       
   166         LOGGER_WRITE("iOldSnapshot->Reset()");
       
   167         iOldSnapshot->Reset();
       
   168         // Write 'null' data to file, 
       
   169         // this removes change history from the file
       
   170         CloseL();
       
   171         }
       
   172     LOGGER_LEAVEFN( "CChangeFinder::ResetL" );
       
   173     }
       
   174 
       
   175 // -----------------------------------------------------------------------------
       
   176 // CChangeFinder::FindChangedItemsL
       
   177 // Compares snapshots, finds changed items
       
   178 // -----------------------------------------------------------------------------
       
   179 void CChangeFinder::FindChangedItemsL( CNSmlDataItemUidSet& aChangedUids )
       
   180     {   
       
   181     LOGGER_ENTERFN( "CChangeFinder::FindChangedItemsL" );
       
   182     aChangedUids.Reset();
       
   183     
       
   184     if ( !iCurrentSnapshot )
       
   185         {
       
   186         LOGGER_WRITE( "CChangeFinder::FindChangedItemsL leaved, no current snapshot." );
       
   187         User::Leave( KErrNotFound );
       
   188         }
       
   189 
       
   190     if ( !iOldSnapshot )
       
   191         {
       
   192         LOGGER_WRITE( "CChangeFinder::FindChangedItemsL leaved, no old snapshot." );
       
   193         User::Leave( KErrNotFound );
       
   194         }
       
   195         
       
   196     TInt index;
       
   197     TInt count = iCurrentSnapshot->Count();
       
   198     LOGGER_WRITE_1( "CChangeFinder::FindChangedItemsL items on iCurrentSnapshot: %d", count );
       
   199     for ( TInt i=0; i < count; i++ )
       
   200         {
       
   201         const TSnapshotItem& currentItem = iCurrentSnapshot->At( i );
       
   202         
       
   203         // Find this entry from the old snapshot
       
   204         if ( iOldSnapshot->FindIsq( currentItem, iKey, index ) == KErrNone)
       
   205             {
       
   206             // This is the old item
       
   207             TSnapshotItem& oldItem = iOldSnapshot->At( index );
       
   208             if ( currentItem.Hash().Compare( oldItem.Hash() ) != 0 )
       
   209                 {
       
   210                 // add to list
       
   211 				User::LeaveIfError( aChangedUids.AddItem( currentItem.ItemId() ) );
       
   212                 }
       
   213             }
       
   214         }
       
   215     
       
   216     LOGGER_LEAVEFN( "CChangeFinder::FindChangedItemsL" );
       
   217     }
       
   218 
       
   219 // -----------------------------------------------------------------------------
       
   220 // CChangeFinder::FindDeletedItemsL
       
   221 // Compares snapshots, finds deleted items
       
   222 // -----------------------------------------------------------------------------
       
   223 void CChangeFinder::FindDeletedItemsL( CNSmlDataItemUidSet& aDeletedUids )
       
   224     {
       
   225     LOGGER_ENTERFN( "CChangeFinder::FindDeletedItemsL" );
       
   226     aDeletedUids.Reset();
       
   227     if ( !iOldSnapshot )
       
   228         {
       
   229         LOGGER_LEAVEFN( "CChangeFinder::FindDeletedItemsL leaved, no old snapshot." );
       
   230         User::Leave( KErrNotFound );
       
   231         }
       
   232         
       
   233     TInt index;
       
   234     TInt count = iOldSnapshot->Count();
       
   235     for ( TInt i=0; i < count; i++ )
       
   236         {
       
   237         const TSnapshotItem& currentItem = iOldSnapshot->At( i );
       
   238         
       
   239         // If there's no current snapshot, this definately is deleted item
       
   240         if ( !iCurrentSnapshot )
       
   241             {
       
   242             User::LeaveIfError( aDeletedUids.AddItem( currentItem.ItemId() ) );
       
   243             LOGGER_WRITE_1( "Item %d was deleted.", currentItem.ItemId() );
       
   244             }
       
   245         // It is also new if it doesn't exist int the current snapshot.
       
   246         else if ( iCurrentSnapshot->FindIsq( currentItem, iKey, index ) != KErrNone )
       
   247             {
       
   248             User::LeaveIfError( aDeletedUids.AddItem( currentItem.ItemId() ) );
       
   249             LOGGER_WRITE_1( "Item %d was deleted.", currentItem.ItemId() );
       
   250             }       
       
   251         }
       
   252         
       
   253     LOGGER_LEAVEFN( "CChangeFinder::FindDeletedItemsL" );
       
   254     }
       
   255 
       
   256 // -----------------------------------------------------------------------------
       
   257 // CChangeFinder::FindNewItemsL
       
   258 // Compares snapshots, finds new items
       
   259 // -----------------------------------------------------------------------------
       
   260 void CChangeFinder::FindNewItemsL( CNSmlDataItemUidSet& aNewUids )
       
   261     {
       
   262     LOGGER_ENTERFN( "CChangeFinder::FindNewItemsL" );
       
   263     aNewUids.Reset();
       
   264     /*if ( !iCurrentSnapshot )
       
   265         {
       
   266         LOGGER_WRITE( "CChangeFinder::FindNewItemsL leaved, no current snapshot." );
       
   267         User::Leave( KErrNotFound );
       
   268         }*/
       
   269 
       
   270     TInt index;
       
   271     TInt count = iCurrentSnapshot->Count();
       
   272     LOGGER_WRITE_1( "iCurrentSnapshot->Count(): %d", count );
       
   273     LOGGER_WRITE_1( "iOldSnapshot->Count(): %d", iOldSnapshot->Count() );
       
   274     for ( TInt i=0; i < count; i++ )
       
   275         {
       
   276         const TSnapshotItem& currentItem = iCurrentSnapshot->At( i );
       
   277         
       
   278         // If there's no old snapshot, all items are new
       
   279         if ( !iOldSnapshot )
       
   280             {
       
   281             User::LeaveIfError( aNewUids.AddItem( currentItem.ItemId() ) );
       
   282             LOGGER_WRITE_1( "!iOldSnapshot, Item %d was new.", currentItem.ItemId() );
       
   283             }
       
   284         // It is also new if it doesn't exist int the old snapshot.
       
   285         else if ( iOldSnapshot->FindIsq( currentItem, iKey, index ) != KErrNone )
       
   286             {
       
   287             User::LeaveIfError( aNewUids.AddItem( currentItem.ItemId() ) );
       
   288             LOGGER_WRITE_1( "Item %d was new.", currentItem.ItemId() );
       
   289             }       
       
   290         }
       
   291         
       
   292     LOGGER_LEAVEFN( "CChangeFinder::FindNewItemsL" );
       
   293     }
       
   294 
       
   295 // -----------------------------------------------------------------------------
       
   296 // CChangeFinder::FindMovedItemsL
       
   297 // Compares snapshots, finds moved items
       
   298 // -----------------------------------------------------------------------------
       
   299 void CChangeFinder::FindMovedItemsL( CNSmlDataItemUidSet& aMovedUids )
       
   300     {
       
   301     LOGGER_ENTERFN( "CChangeFinder::FindMovedItemsL" );
       
   302     aMovedUids.Reset();
       
   303     if ( !iCurrentSnapshot )
       
   304         {
       
   305         LOGGER_WRITE( "CChangeFinder::FindMovedItemsL leaved, no current snapshot." );
       
   306         User::Leave( KErrNotFound );
       
   307         }
       
   308         
       
   309     if ( !iOldSnapshot )
       
   310         {
       
   311         LOGGER_WRITE( "CChangeFinder::FindMovedItemsL leaved, no old snapshot." );
       
   312         User::Leave( KErrNotFound );
       
   313         }
       
   314         
       
   315     TInt index;
       
   316     TInt count = iCurrentSnapshot->Count();
       
   317     for ( TInt i=0; i < count; i++ )
       
   318         {
       
   319         const TSnapshotItem& currentItem = iCurrentSnapshot->At( i );
       
   320         
       
   321         // Find this entry from the old snapshot
       
   322         if(iOldSnapshot->FindIsq( currentItem, iKey, index ) == KErrNone)
       
   323             {
       
   324             // This is the old item
       
   325             TSnapshotItem& oldItem = iOldSnapshot->At( index );
       
   326             
       
   327             // Report only moved items in which only parent id has been changed
       
   328             if ( oldItem.ParentId() != currentItem.ParentId()
       
   329                 && currentItem.Hash().Compare( oldItem.Hash() ) == 0 )
       
   330                 {
       
   331                 User::LeaveIfError( aMovedUids.AddItem( currentItem.ItemId() ) );
       
   332                 LOGGER_WRITE_1( "Item %d was moved.", currentItem.ItemId() );
       
   333                 }
       
   334             }       
       
   335         }
       
   336     
       
   337     LOGGER_LEAVEFN( "CChangeFinder::FindMovedItemsL" );     
       
   338     }
       
   339 
       
   340 // -----------------------------------------------------------------------------
       
   341 // CChangeFinder::ItemAddedL
       
   342 // Adds item to snapshot, this item is no longer considered new
       
   343 // -----------------------------------------------------------------------------
       
   344 void CChangeFinder::ItemAddedL( const TSnapshotItem& aItem )
       
   345     {
       
   346     LOGGER_ENTERFN( "CChangeFinder::ItemAddedL" );
       
   347     
       
   348     // Add this to old snapshot, if there's no old snapshot it must be created
       
   349     if ( !iOldSnapshot )
       
   350         {
       
   351         iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
       
   352         }
       
   353         
       
   354     LOGGER_WRITE_1( "Adding item %d.", aItem.ItemId() );
       
   355     
       
   356     iOldSnapshot->InsertIsqL( aItem, iKey );
       
   357     iOldSnapshot->Compress();
       
   358     
       
   359     LOGGER_LEAVEFN( "CChangeFinder::ItemAddedL" );
       
   360     }
       
   361 
       
   362 // -----------------------------------------------------------------------------
       
   363 // CChangeFinder::ItemDeletedL
       
   364 // Removes item to snapshot, this item is no longer considered deleted
       
   365 // -----------------------------------------------------------------------------
       
   366 void CChangeFinder::ItemDeletedL( const TSnapshotItem& aItem )
       
   367     {
       
   368     LOGGER_ENTERFN( "CChangeFinder::ItemDeletedL" );
       
   369     
       
   370     LOGGER_WRITE_1( "deleting item %d.", aItem.ItemId() );
       
   371     
       
   372     if ( !iOldSnapshot )
       
   373         {
       
   374         LOGGER_WRITE( "CChangeFinder::ItemDeletedL leaved, no old snapshot." );
       
   375         User::Leave( KErrNotFound );
       
   376         }
       
   377     
       
   378     // Delete item from the old snapshot
       
   379     TInt index;
       
   380     if ( iOldSnapshot->FindIsq( aItem, iKey, index ) == KErrNone )
       
   381         {
       
   382         iOldSnapshot->Delete( index );
       
   383         }
       
   384     else // Skip, there wasn't such entry
       
   385         {
       
   386         LOGGER_WRITE( "iOldSnapshot->FindIsq, item was not found." );
       
   387         }  
       
   388     
       
   389     LOGGER_LEAVEFN( "CChangeFinder::ItemDeletedL" );
       
   390     }
       
   391 
       
   392 // -----------------------------------------------------------------------------
       
   393 // CChangeFinder::ItemUpdatedL
       
   394 // Updates item to snapshot, this item is no longer considered changed
       
   395 // -----------------------------------------------------------------------------
       
   396 void CChangeFinder::ItemUpdatedL( const TSnapshotItem& aItem )
       
   397     {
       
   398     LOGGER_ENTERFN( "CChangeFinder::ItemUpdatedL" );
       
   399 
       
   400     LOGGER_WRITE_1( "Updating item %d.", aItem.ItemId() );
       
   401     
       
   402     // There must be such entry in the snapshot after this
       
   403     // If there isn't old snapshot, we'll create it and add the item
       
   404     
       
   405     if ( !iOldSnapshot )
       
   406         {
       
   407         iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
       
   408         ItemAddedL( aItem );
       
   409         }
       
   410     else
       
   411         {
       
   412         // Update item in the old snapshot
       
   413         TInt index;
       
   414         if ( iOldSnapshot->FindIsq( aItem, iKey, index ) == KErrNone )
       
   415             {
       
   416             iOldSnapshot->At( index ) = aItem;
       
   417             }
       
   418         else 
       
   419             {
       
   420             // There was old snapshot but no such item. Let's add it
       
   421             ItemAddedL( aItem );
       
   422             }
       
   423         
       
   424         }
       
   425         
       
   426     LOGGER_LEAVEFN( "CChangeFinder::ItemUpdatedL" );
       
   427     }
       
   428 
       
   429 // -----------------------------------------------------------------------------
       
   430 // CChangeFinder::ItemMovedL
       
   431 // Moves item within snapshot, this item is no longer considered moved
       
   432 // -----------------------------------------------------------------------------
       
   433 void CChangeFinder::ItemMovedL( const TSnapshotItem& aItem )
       
   434     {
       
   435     LOGGER_ENTERFN( "CChangeFinder::ItemMovedL" );
       
   436     
       
   437     LOGGER_WRITE_1( "Moving item %d.", aItem.ItemId() );
       
   438             
       
   439     // There must be such entry in the snapshot after this
       
   440     // If there isn't old snapshot, we'll create it and add the item
       
   441     if ( !iOldSnapshot )
       
   442         {
       
   443         iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
       
   444         ItemAddedL( aItem );
       
   445         }
       
   446     else
       
   447         {
       
   448         // Update item's parent in the old snapshot
       
   449         TInt index;
       
   450         if ( iOldSnapshot->FindIsq( aItem, iKey, index ) == KErrNone )
       
   451             {
       
   452             iOldSnapshot->At(index) = aItem;
       
   453             }
       
   454         else 
       
   455             {
       
   456             // There was old snapshot but no such item. Let's add it
       
   457             ItemAddedL( aItem );
       
   458             }   
       
   459         }
       
   460     
       
   461     LOGGER_LEAVEFN("CChangeFinder::ItemMovedL");    
       
   462     }
       
   463 
       
   464 // -----------------------------------------------------------------------------
       
   465 // CChangeFinder::CommitChangesL
       
   466 // Commits current changes to snapshot
       
   467 // -----------------------------------------------------------------------------
       
   468 void CChangeFinder::CommitChangesL()
       
   469     {
       
   470     LOGGER_ENTERFN( "CChangeFinder::CommitChangesL" );
       
   471     
       
   472     if ( !iCurrentSnapshot )
       
   473         {
       
   474         LOGGER_WRITE( "CChangeFinder::CommitChangesL leaved, current snapshot missing." );
       
   475         User::Leave( KErrNotFound );
       
   476         }
       
   477         
       
   478     if ( !iOldSnapshot )
       
   479         {
       
   480         iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
       
   481         }
       
   482         
       
   483     // Delete everything from the old snapshot
       
   484     iOldSnapshot->Reset();
       
   485     
       
   486     // Loop through all the items in current snapshot
       
   487     TInt count = iCurrentSnapshot->Count();
       
   488     
       
   489     // Copy everything from current to old snapshot
       
   490     for ( TInt i = 0; i < count; i++ )
       
   491         {
       
   492         // Commit it to the old array.
       
   493         iOldSnapshot->InsertIsqL( iCurrentSnapshot->At( i ), iKey );
       
   494         }
       
   495     LOGGER_LEAVEFN( "CChangeFinder::CommitChangesL" );
       
   496     }
       
   497 
       
   498 // -----------------------------------------------------------------------------
       
   499 // CChangeFinder::CommitChangesL
       
   500 // Commits current changes to snapshot, affects only a specified group of items
       
   501 // -----------------------------------------------------------------------------
       
   502 void CChangeFinder::CommitChangesL( const MSmlDataItemUidSet& aUids )
       
   503     {
       
   504     LOGGER_ENTERFN( "CChangeFinder::CommitChangesL" );
       
   505     
       
   506     // This function commits changes from current snapshot to old snapshot
       
   507     // But commits only the entries in the parameter array
       
   508     if ( !iCurrentSnapshot )
       
   509         {
       
   510         LOGGER_WRITE( "CChangeFinder::CommitChangesL leaved, current snapshot missing." );
       
   511         User::Leave( KErrNotFound );
       
   512         }
       
   513         
       
   514     if ( !iOldSnapshot )
       
   515         {
       
   516         iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
       
   517         }
       
   518     
       
   519     for ( TInt i = 0; i < aUids.ItemCount(); i++ )
       
   520 		{
       
   521 		TSmlDbItemUid itemId = aUids.ItemAt( i );
       
   522 		TSnapshotItem temp( itemId );
       
   523 		TInt indexOld( -1 );
       
   524 		TInt indexNew( -1 );
       
   525 		if ( !iOldSnapshot->FindIsq( temp, iKey, indexOld) )
       
   526 			{
       
   527 			if ( !iCurrentSnapshot->FindIsq(temp, iKey, indexNew) )
       
   528 				{
       
   529 				// Replace, moved or softdeleted
       
   530 				iOldSnapshot->At( indexOld ) = iCurrentSnapshot->At( indexNew );
       
   531 				}
       
   532 			else
       
   533 				{
       
   534 				// Delete
       
   535 				iOldSnapshot->Delete( indexOld );
       
   536 				}
       
   537 			}
       
   538 		else
       
   539 			{
       
   540 			// Add
       
   541 			if ( !iCurrentSnapshot->FindIsq( temp, iKey, indexNew ) )
       
   542 			    {
       
   543 			    iOldSnapshot->InsertIsqL( iCurrentSnapshot->At( indexNew ), iKey );
       
   544 			    }
       
   545 			}
       
   546 		}
       
   547     LOGGER_LEAVEFN( "CChangeFinder::CommitChangesL" );
       
   548     }
       
   549 
       
   550 // -----------------------------------------------------------------------------
       
   551 // CChangeFinder::SetNewSnapshot
       
   552 // Sets new snapshot (to be compared against), ChangeFinder takes ownership
       
   553 // -----------------------------------------------------------------------------
       
   554 void CChangeFinder::SetNewSnapshot( CSnapshotArray* aNewSnapshot )
       
   555     {
       
   556     LOGGER_ENTERFN( "CChangeFinder::SetNewSnapshot" );
       
   557     
       
   558     // Delete existing snapshot
       
   559     delete iCurrentSnapshot;
       
   560     
       
   561     // Set submitted snapshot as active
       
   562     iCurrentSnapshot = aNewSnapshot;
       
   563     LOGGER_LEAVEFN( "CChangeFinder::SetNewSnapshot" );
       
   564     }
       
   565 
       
   566 // -----------------------------------------------------------------------------
       
   567 // CChangeFinder::DataStoreUid
       
   568 // returns stored data store id number
       
   569 // -----------------------------------------------------------------------------
       
   570 TInt64 CChangeFinder::DataStoreUid() const
       
   571     {
       
   572     LOGGER_ENTERFN( "CChangeFinder::DataStoreUid" );
       
   573     LOGGER_LEAVEFN( "CChangeFinder::DataStoreUid" );
       
   574     return iDataStoreUid;
       
   575     }
       
   576 
       
   577 // -----------------------------------------------------------------------------
       
   578 // CChangeFinder::SetDataStoreUid
       
   579 // Sets data store id number
       
   580 // -----------------------------------------------------------------------------
       
   581 void CChangeFinder::SetDataStoreUid( TInt64 aUid )
       
   582     {
       
   583     LOGGER_ENTERFN( "CChangeFinder::SetDataStoreUid" );
       
   584     iDataStoreUid = aUid;
       
   585     LOGGER_LEAVEFN( "CChangeFinder::SetDataStoreUid" );
       
   586     }