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/*
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* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: Part of SyncML Data Synchronization Plug In Adapter
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*
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*/
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#include "changefinder.h"
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#include "logger.h"
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const TUint KSnapshotFormatVersion ( 0xf0000001 ); // format version
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// -----------------------------------------------------------------------------
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// CChangeFinder::NewL
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// Static function to create CChangeFider object(s)
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// -----------------------------------------------------------------------------
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CChangeFinder* CChangeFinder::NewL( MSmlSyncRelationship& aSyncRelationship, TKeyArrayFix aKey,
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TBool& aHasHistory, TInt aStreamUid )
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{
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CChangeFinder* self = new (ELeave) CChangeFinder( aSyncRelationship, aKey, aStreamUid );
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CleanupStack::PushL( self );
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self->ConstructL( aHasHistory );
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CleanupStack::Pop( self );
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return self;
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::CChangeFinder
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// Constructor for the class
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// -----------------------------------------------------------------------------
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CChangeFinder::CChangeFinder( MSmlSyncRelationship& aSyncRelationship, TKeyArrayFix aKey, TInt aStreamUid ) :
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iSyncRelationship( aSyncRelationship ),
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iKey( aKey ),
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iStreamUid( aStreamUid ),
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iDataStoreUid( KErrNotFound )
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{
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::~CChangeFinder
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// Destructor for the class, closes the ChangeFinder and writes snapshot to stream
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// -----------------------------------------------------------------------------
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CChangeFinder::~CChangeFinder()
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{
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LOGGER_ENTERFN( "CChangeFinder::~CChangeFinder" );
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TInt error;
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TRAP( error, CloseL() );
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if ( error != KErrNone )
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{
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LOGGER_WRITE( "CChangeFinder::~CChangeFinder, CloseL failed." );
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}
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delete iCurrentSnapshot;
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delete iOldSnapshot;
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LOGGER_LEAVEFN( "CChangeFinder::~CChangeFinder" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::ConstructL
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// 2nd phase constructor for the class, reads snapshot from stream
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// -----------------------------------------------------------------------------
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void CChangeFinder::ConstructL( TBool& aHasHistory )
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{
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LOGGER_ENTERFN( "CChangeFinder::ConstructL" );
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aHasHistory = EFalse;
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RReadStream readStream;
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TUid streamId;
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streamId.iUid = iStreamUid;
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aHasHistory = iSyncRelationship.IsStreamPresentL(streamId);
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if (aHasHistory)
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{
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iSyncRelationship.OpenReadStreamLC(readStream, streamId);
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// Read the index, first create snapshot array
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iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
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// Read used format version
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TUint formatVer = readStream.ReadUint32L();
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if ( formatVer != KSnapshotFormatVersion )
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{
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// Wrong version, do not try to import data
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LOGGER_WRITE("CChangeFinder::ConstructL, Wrong format version -> no history");
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aHasHistory = EFalse;
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CleanupStack::PopAndDestroy(); // readStream
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LOGGER_LEAVEFN("CChangeFinder::ConstructL");
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return;
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}
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// Read item count
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TInt count = readStream.ReadUint32L();
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// Read items
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for ( TInt i=0; i<count; i++ )
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{
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TSnapshotItem item;
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item.InternalizeL( readStream );
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iOldSnapshot->InsertIsqL( item, iKey );
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}
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readStream.Close();
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readStream.Pop();
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}
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else
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{
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LOGGER_WRITE("CChangeFinder::ConstructL, no sync history.");
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}
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LOGGER_LEAVEFN("CChangeFinder::ConstructL");
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::CloseL
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// Closes ChangeFinder object and writes snapshot to stream
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// -----------------------------------------------------------------------------
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void CChangeFinder::CloseL()
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{
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LOGGER_ENTERFN( "CChangeFinder::CloseL" );
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// Write to stream
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RWriteStream writeStream;
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TUid streamId;
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streamId.iUid = iStreamUid;
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// Open write stream
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iSyncRelationship.OpenWriteStreamLC( writeStream, streamId );
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// Write used format version
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writeStream.WriteUint32L( KSnapshotFormatVersion );
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// Write item count
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TInt count(0);
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if ( iOldSnapshot )
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{
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count = iOldSnapshot->Count();
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}
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writeStream.WriteUint32L(count);
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// Write items
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for (TInt i=0; i<count; i++)
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{
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const TSnapshotItem& item = iOldSnapshot->At( i );
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item.ExternalizeL( writeStream );
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}
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writeStream.CommitL();
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writeStream.Close();
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writeStream.Pop();
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LOGGER_LEAVEFN( "CChangeFinder::CloseL" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::ResetL
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// Resets synchronization history, all contetn is considered new after this call
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// -----------------------------------------------------------------------------
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void CChangeFinder::ResetL()
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{
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LOGGER_ENTERFN( "CChangeFinder::ResetL" );
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// Delete old change information
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if ( iOldSnapshot )
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{
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LOGGER_WRITE("iOldSnapshot->Reset()");
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iOldSnapshot->Reset();
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}
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// Write 'null' data to file,
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// this removes change history from the file
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CloseL();
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LOGGER_LEAVEFN( "CChangeFinder::ResetL" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::FindChangedItemsL
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// Compares snapshots, finds changed items
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// -----------------------------------------------------------------------------
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void CChangeFinder::FindChangedItemsL( CNSmlDataItemUidSet& aChangedUids )
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{
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LOGGER_ENTERFN( "CChangeFinder::FindChangedItemsL" );
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if ( !iCurrentSnapshot )
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{
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LOGGER_WRITE( "CChangeFinder::FindChangedItemsL leaved, no current snapshot." );
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User::Leave( KErrNotFound );
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}
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if ( !iOldSnapshot )
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{
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LOGGER_WRITE( "CChangeFinder::FindChangedItemsL leaved, no old snapshot." );
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User::Leave( KErrNotFound );
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}
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TInt index;
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TInt count = iCurrentSnapshot->Count();
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for ( TInt i=0; i < count; i++ )
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{
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const TSnapshotItem& currentItem = iCurrentSnapshot->At( i );
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// Find this entry from the old snapshot
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if ( iOldSnapshot->FindIsq( currentItem, iKey, index ) == KErrNone)
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{
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// This is the old item
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TSnapshotItem& oldItem = iOldSnapshot->At( index );
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// Compare times to see whether this was changed or item was read
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if ( ( oldItem.LastChangedDate() != currentItem.LastChangedDate() )
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|| ( oldItem.Unread() && !currentItem.Unread() )
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|| ( !oldItem.Unread() && currentItem.Unread() )
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|| ( oldItem.FolderName().Compare( currentItem.FolderName() ) != 0 ) )
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{
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aChangedUids.AddItem( currentItem.ItemId() );
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LOGGER_WRITE_1( "Item %d was changed.", currentItem.ItemId() );
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}
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}
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}
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LOGGER_LEAVEFN( "CChangeFinder::FindChangedItemsL" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::FindDeletedItemsL
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// Compares snapshots, finds deleted items
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// -----------------------------------------------------------------------------
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void CChangeFinder::FindDeletedItemsL( CNSmlDataItemUidSet& aDeletedUids )
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{
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LOGGER_ENTERFN( "CChangeFinder::FindDeletedItemsL" );
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if ( !iOldSnapshot )
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{
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LOGGER_LEAVEFN( "CChangeFinder::FindDeletedItemsL leaved, no old snapshot." );
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User::Leave( KErrNotFound );
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}
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TInt index;
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TInt count = iOldSnapshot->Count();
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for ( TInt i=0; i < count; i++ )
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{
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const TSnapshotItem& currentItem = iOldSnapshot->At( i );
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// If there's no current snapshot, this definately is deleted item
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if ( !iCurrentSnapshot )
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{
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aDeletedUids.AddItem( currentItem.ItemId() );
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LOGGER_WRITE_1( "Item %d was deleted.", currentItem.ItemId() );
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}
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// It is also new if it doesn't exist int the current snapshot.
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else if ( iCurrentSnapshot->FindIsq( currentItem, iKey, index ) != KErrNone )
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{
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aDeletedUids.AddItem( currentItem.ItemId() );
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LOGGER_WRITE_1( "Item %d was deleted.", currentItem.ItemId() );
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}
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}
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LOGGER_LEAVEFN( "CChangeFinder::FindDeletedItemsL" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::FindNewItemsL
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// Compares snapshots, finds new items
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// -----------------------------------------------------------------------------
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void CChangeFinder::FindNewItemsL( CNSmlDataItemUidSet& aNewUids )
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{
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LOGGER_ENTERFN( "CChangeFinder::FindNewItemsL" );
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if ( !iCurrentSnapshot )
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{
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LOGGER_WRITE( "CChangeFinder::FindNewItemsL leaved, no current snapshot." );
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User::Leave( KErrNotFound );
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}
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TInt index;
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TInt count = iCurrentSnapshot->Count();
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for ( TInt i=0; i < count; i++ )
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{
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const TSnapshotItem& currentItem = iCurrentSnapshot->At( i );
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// If there's no old snapshot, all items are new
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if ( !iOldSnapshot )
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{
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aNewUids.AddItem( currentItem.ItemId() );
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LOGGER_WRITE_1( "Item %d was new.", currentItem.ItemId() );
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}
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// It is also new if it doesn't exist int the old snapshot.
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else if ( iOldSnapshot->FindIsq( currentItem, iKey, index ) != KErrNone )
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{
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aNewUids.AddItem( currentItem.ItemId() );
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LOGGER_WRITE_1( "Item %d was new.", currentItem.ItemId() );
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}
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}
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LOGGER_LEAVEFN( "CChangeFinder::FindNewItemsL" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::FindMovedItemsL
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// Compares snapshots, finds moved items
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// -----------------------------------------------------------------------------
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void CChangeFinder::FindMovedItemsL( CNSmlDataItemUidSet& aMovedUids )
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{
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LOGGER_ENTERFN( "CChangeFinder::FindMovedItemsL" );
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if ( !iCurrentSnapshot )
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{
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LOGGER_WRITE( "CChangeFinder::FindMovedItemsL leaved, no current snapshot." );
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User::Leave( KErrNotFound );
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}
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if ( !iOldSnapshot )
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{
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LOGGER_WRITE( "CChangeFinder::FindMovedItemsL leaved, no old snapshot." );
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User::Leave( KErrNotFound );
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}
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TInt index;
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TInt count = iCurrentSnapshot->Count();
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for ( TInt i=0; i < count; i++ )
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{
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const TSnapshotItem& currentItem = iCurrentSnapshot->At( i );
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// Find this entry from the old snapshot
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if(iOldSnapshot->FindIsq( currentItem, iKey, index ) == KErrNone)
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{
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// This is the old item
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TSnapshotItem& oldItem = iOldSnapshot->At( index );
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// Report only moved items in which only parent id has been changed
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if ( oldItem.ParentId() != currentItem.ParentId()
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&& oldItem.LastChangedDate() == currentItem.LastChangedDate()
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&& !(oldItem.Unread() && !currentItem.Unread() )
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&& !(!oldItem.Unread() && currentItem.Unread() ) )
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{
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aMovedUids.AddItem( currentItem.ItemId() );
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LOGGER_WRITE_1( "Item %d was moved.", currentItem.ItemId() );
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}
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}
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}
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LOGGER_LEAVEFN( "CChangeFinder::FindMovedItemsL" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::ItemAddedL
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// Adds item to snapshot, this item is no longer considered new
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// -----------------------------------------------------------------------------
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void CChangeFinder::ItemAddedL( const TSnapshotItem& aItem )
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{
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LOGGER_ENTERFN( "CChangeFinder::ItemAddedL" );
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// Add this to old snapshot, if there's no old snapshot it must be created
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if ( !iOldSnapshot )
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{
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iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
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}
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LOGGER_WRITE_1( "Adding item %d.", aItem.ItemId() );
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TRAPD( error, iOldSnapshot->InsertIsqL( aItem, iKey ) );
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if ( error == KErrAlreadyExists )
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{
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// It was already committed, no actions required
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LOGGER_WRITE( "iOldSnapshot->InsertIsqL leaved with KErrAlreadyExists" );
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}
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else if ( error != KErrNone )
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{
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LOGGER_WRITE_1( "iOldSnapshot->InsertIsqL leaved with %d.", error );
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User::Leave( error );
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}
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LOGGER_LEAVEFN( "CChangeFinder::ItemAddedL" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::ItemDeletedL
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// Removes item to snapshot, this item is no longer considered deleted
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// -----------------------------------------------------------------------------
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void CChangeFinder::ItemDeletedL( const TSnapshotItem& aItem )
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{
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LOGGER_ENTERFN( "CChangeFinder::ItemDeleted" );
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LOGGER_WRITE_1( "deleting item %d.", aItem.ItemId() );
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if ( !iOldSnapshot )
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{
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LOGGER_WRITE( "CChangeFinder::ItemDeleted leaved, no old snapshot." );
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User::Leave( KErrNotFound );
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}
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// Delete item from the old snapshot
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TInt index;
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if ( iOldSnapshot->FindIsq( aItem, iKey, index ) == KErrNone )
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{
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iOldSnapshot->Delete( index );
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}
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else // Skip, there wasn't such entry
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{
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LOGGER_WRITE( "iOldSnapshot->FindIsq, item was not found." );
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}
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LOGGER_LEAVEFN( "CChangeFinder::ItemDeleted" );
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}
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// -----------------------------------------------------------------------------
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// CChangeFinder::ItemUpdatedL
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// Updates item to snapshot, this item is no longer considered changed
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// -----------------------------------------------------------------------------
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void CChangeFinder::ItemUpdatedL( const TSnapshotItem& aItem )
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{
|
|
424 |
LOGGER_ENTERFN( "CChangeFinder::ItemUpdatedL" );
|
|
425 |
|
|
426 |
LOGGER_WRITE_1( "Updating item %d.", aItem.ItemId() );
|
|
427 |
|
|
428 |
// There must be such entry in the snapshot after this
|
|
429 |
// If there isn't old snapshot, we'll create it and add the item
|
|
430 |
if ( !iOldSnapshot )
|
|
431 |
{
|
|
432 |
iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
|
|
433 |
ItemAddedL( aItem );
|
|
434 |
}
|
|
435 |
else
|
|
436 |
{
|
|
437 |
// Update item in the old snapshot
|
|
438 |
TInt index;
|
|
439 |
if ( iOldSnapshot->FindIsq( aItem, iKey, index ) == KErrNone )
|
|
440 |
{
|
|
441 |
TSnapshotItem& oldItem = iOldSnapshot->At( index );
|
|
442 |
oldItem = aItem;
|
|
443 |
}
|
|
444 |
else
|
|
445 |
{
|
|
446 |
// There was old snapshot but no such item. Let's add it
|
|
447 |
ItemAddedL( aItem );
|
|
448 |
}
|
|
449 |
|
|
450 |
}
|
|
451 |
|
|
452 |
LOGGER_LEAVEFN( "CChangeFinder::ItemUpdatedL" );
|
|
453 |
}
|
|
454 |
|
|
455 |
// -----------------------------------------------------------------------------
|
|
456 |
// CChangeFinder::ItemMovedL
|
|
457 |
// Moves item within snapshot, this item is no longer considered moved
|
|
458 |
// -----------------------------------------------------------------------------
|
|
459 |
void CChangeFinder::ItemMovedL( const TSnapshotItem& aItem )
|
|
460 |
{
|
|
461 |
LOGGER_ENTERFN( "CChangeFinder::ItemMovedL" );
|
|
462 |
|
|
463 |
LOGGER_WRITE_1( "Moving item %d.", aItem.ItemId() );
|
|
464 |
|
|
465 |
// There must be such entry in the snapshot after this
|
|
466 |
// If there isn't old snapshot, we'll create it and add the item
|
|
467 |
if ( !iOldSnapshot )
|
|
468 |
{
|
|
469 |
iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
|
|
470 |
ItemAddedL( aItem );
|
|
471 |
}
|
|
472 |
else
|
|
473 |
{
|
|
474 |
// Update item's parent in the old snapshot
|
|
475 |
TInt index;
|
|
476 |
if ( iOldSnapshot->FindIsq( aItem, iKey, index ) == KErrNone )
|
|
477 |
{
|
|
478 |
TSnapshotItem& oldItem = iOldSnapshot->At( index );
|
|
479 |
oldItem.SetParentId( aItem.ParentId() );
|
|
480 |
}
|
|
481 |
else
|
|
482 |
{
|
|
483 |
// There was old snapshot but no such item. Let's add it
|
|
484 |
ItemAddedL( aItem );
|
|
485 |
}
|
|
486 |
}
|
|
487 |
|
|
488 |
LOGGER_LEAVEFN("CChangeFinder::ItemMovedL");
|
|
489 |
}
|
|
490 |
|
|
491 |
// -----------------------------------------------------------------------------
|
|
492 |
// CChangeFinder::CommitChangesL
|
|
493 |
// Commits current changes to snapshot
|
|
494 |
// -----------------------------------------------------------------------------
|
|
495 |
void CChangeFinder::CommitChangesL()
|
|
496 |
{
|
|
497 |
LOGGER_ENTERFN( "CChangeFinder::CommitChangesL" );
|
|
498 |
|
|
499 |
if ( !iCurrentSnapshot )
|
|
500 |
{
|
|
501 |
LOGGER_WRITE( "CChangeFinder::CommitChangesL leaved, current snapshot missing." );
|
|
502 |
User::Leave( KErrNotFound );
|
|
503 |
}
|
|
504 |
|
|
505 |
if ( !iOldSnapshot )
|
|
506 |
{
|
|
507 |
iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
|
|
508 |
}
|
|
509 |
|
|
510 |
// Delete everything from the old snapshot
|
|
511 |
iOldSnapshot->Reset();
|
|
512 |
|
|
513 |
// Loop through all the items in current snapshot
|
|
514 |
TInt count = iCurrentSnapshot->Count();
|
|
515 |
|
|
516 |
// Copy everything from current to old snapshot
|
|
517 |
for ( TInt i=0; i < count; i++ )
|
|
518 |
{
|
|
519 |
const TSnapshotItem& newItem = iCurrentSnapshot->At( i );
|
|
520 |
|
|
521 |
// Commit it to the old array.
|
|
522 |
TRAPD( error, iOldSnapshot->InsertIsqL( newItem, iKey ) );
|
|
523 |
if ( error == KErrAlreadyExists )
|
|
524 |
{
|
|
525 |
// It was already committed, this is an internal error of change finder
|
|
526 |
LOGGER_WRITE( "iOldSnapshot->InsertIsqL leaved with KErrAlreadyExists." );
|
|
527 |
User::Leave( error );
|
|
528 |
}
|
|
529 |
else if ( error != KErrNone )
|
|
530 |
{
|
|
531 |
LOGGER_WRITE_1( "iOldSnapshot->InsertIsqL leaved with %d.", error );
|
|
532 |
User::Leave( error );
|
|
533 |
}
|
|
534 |
}
|
|
535 |
LOGGER_LEAVEFN( "CChangeFinder::CommitChangesL" );
|
|
536 |
}
|
|
537 |
|
|
538 |
// -----------------------------------------------------------------------------
|
|
539 |
// CChangeFinder::CommitChangesL
|
|
540 |
// Commits current changes to snapshot, affects only a specified group of items
|
|
541 |
// -----------------------------------------------------------------------------
|
|
542 |
void CChangeFinder::CommitChangesL( const MSmlDataItemUidSet& aUids )
|
|
543 |
{
|
|
544 |
LOGGER_ENTERFN( "CChangeFinder::CommitChangesL" );
|
|
545 |
|
|
546 |
// This function commits changes from current snapshot to old snapshot
|
|
547 |
// But commits only the entries in the parameter array
|
|
548 |
if ( !iCurrentSnapshot )
|
|
549 |
{
|
|
550 |
LOGGER_WRITE( "CChangeFinder::CommitChangesL leaved, current snapshot missing." );
|
|
551 |
User::Leave( KErrNotFound );
|
|
552 |
}
|
|
553 |
|
|
554 |
if ( !iOldSnapshot )
|
|
555 |
{
|
|
556 |
iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
|
|
557 |
}
|
|
558 |
|
|
559 |
// Use only these uid values
|
|
560 |
TInt index;
|
|
561 |
TInt count = aUids.ItemCount();
|
|
562 |
|
|
563 |
for ( TInt i=0; i < count; i++ )
|
|
564 |
{
|
|
565 |
TSmlDbItemUid uid = aUids.ItemAt( i );
|
|
566 |
TSnapshotItem item( uid );
|
|
567 |
// Let's see if this uid exists in the current snapshot
|
|
568 |
if ( iCurrentSnapshot->FindIsq( item, iKey, index ) == KErrNone )
|
|
569 |
{
|
|
570 |
// This is the new item
|
|
571 |
const TSnapshotItem& newItem = iCurrentSnapshot->At( index );
|
|
572 |
|
|
573 |
// Let's see if we can find the old one
|
|
574 |
if ( iOldSnapshot->FindIsq( item, iKey, index ) == KErrNone )
|
|
575 |
{
|
|
576 |
// This is the old item
|
|
577 |
TSnapshotItem& oldItem = iOldSnapshot->At( index );
|
|
578 |
|
|
579 |
// Copy new item over the old one, this'll commit the change
|
|
580 |
oldItem = newItem;
|
|
581 |
}
|
|
582 |
else // This entry was not found. It means that it is new one
|
|
583 |
{
|
|
584 |
// Commit it to the old array.
|
|
585 |
ItemAddedL( newItem );
|
|
586 |
}
|
|
587 |
}
|
|
588 |
else
|
|
589 |
{
|
|
590 |
// This item was deleted from the current snapshot.
|
|
591 |
TSnapshotItem toDelete( item );
|
|
592 |
ItemDeletedL( toDelete );
|
|
593 |
}
|
|
594 |
}
|
|
595 |
|
|
596 |
LOGGER_LEAVEFN( "CChangeFinder::CommitChangesL" );
|
|
597 |
}
|
|
598 |
|
|
599 |
// -----------------------------------------------------------------------------
|
|
600 |
// CChangeFinder::SetNewSnapshot
|
|
601 |
// Sets new snapshot (to be compared against), ChangeFinder takes ownership
|
|
602 |
// -----------------------------------------------------------------------------
|
|
603 |
void CChangeFinder::SetNewSnapshot( CSnapshotArray* aNewSnapshot )
|
|
604 |
{
|
|
605 |
LOGGER_ENTERFN( "CChangeFinder::SetNewSnapshot" );
|
|
606 |
|
|
607 |
// Delete existing snapshot
|
|
608 |
delete iCurrentSnapshot;
|
|
609 |
|
|
610 |
// Set submitted snapshot as active
|
|
611 |
iCurrentSnapshot = aNewSnapshot;
|
|
612 |
LOGGER_LEAVEFN( "CChangeFinder::SetNewSnapshot" );
|
|
613 |
}
|
|
614 |
|
|
615 |
// -----------------------------------------------------------------------------
|
|
616 |
// CChangeFinder::DataStoreUid
|
|
617 |
// returns stored data store id number
|
|
618 |
// -----------------------------------------------------------------------------
|
|
619 |
TInt64 CChangeFinder::DataStoreUid() const
|
|
620 |
{
|
|
621 |
LOGGER_ENTERFN( "CChangeFinder::DataStoreUid" );
|
|
622 |
LOGGER_LEAVEFN( "CChangeFinder::DataStoreUid" );
|
|
623 |
return iDataStoreUid;
|
|
624 |
}
|
|
625 |
|
|
626 |
// -----------------------------------------------------------------------------
|
|
627 |
// CChangeFinder::SetDataStoreUid
|
|
628 |
// Sets data store id number
|
|
629 |
// -----------------------------------------------------------------------------
|
|
630 |
void CChangeFinder::SetDataStoreUid( TInt64 aUid )
|
|
631 |
{
|
|
632 |
LOGGER_ENTERFN( "CChangeFinder::SetDataStoreUid" );
|
|
633 |
iDataStoreUid = aUid;
|
|
634 |
LOGGER_LEAVEFN( "CChangeFinder::SetDataStoreUid" );
|
|
635 |
}
|
|
636 |
|
|
637 |
// -----------------------------------------------------------------------------
|
|
638 |
// CChangeFinder::UpdatePartialL
|
|
639 |
// Returns ETrue if item can be updated partially (only status bits are changed)
|
|
640 |
// -----------------------------------------------------------------------------
|
|
641 |
TBool CChangeFinder::UpdatePartialL( TSmlDbItemUid& aUid )
|
|
642 |
{
|
|
643 |
LOGGER_ENTERFN( "CChangeFinder::UpdatePartialL" );
|
|
644 |
|
|
645 |
if ( !iCurrentSnapshot )
|
|
646 |
{
|
|
647 |
LOGGER_WRITE( "CChangeFinder::UpdatePartialL leaved, current snapshot missing." );
|
|
648 |
User::Leave( KErrNotFound );
|
|
649 |
}
|
|
650 |
|
|
651 |
if ( !iOldSnapshot )
|
|
652 |
{
|
|
653 |
LOGGER_LEAVEFN( "CChangeFinder::UpdatePartialL" );
|
|
654 |
return EFalse;
|
|
655 |
}
|
|
656 |
|
|
657 |
TInt index;
|
|
658 |
TSnapshotItem item( aUid );
|
|
659 |
// Find from current snapshot, if not found -> deleted
|
|
660 |
if ( iCurrentSnapshot->FindIsq( item, iKey, index ) != KErrNone )
|
|
661 |
{
|
|
662 |
LOGGER_LEAVEFN( "CChangeFinder::UpdatePartialL" );
|
|
663 |
return EFalse;
|
|
664 |
}
|
|
665 |
|
|
666 |
// Current item
|
|
667 |
const TSnapshotItem& currentItem = iCurrentSnapshot->At( index );
|
|
668 |
|
|
669 |
// Old item, if not found -> added
|
|
670 |
if ( iOldSnapshot->FindIsq( item, iKey, index ) != KErrNone )
|
|
671 |
{
|
|
672 |
LOGGER_LEAVEFN( "CChangeFinder::UpdatePartialL" );
|
|
673 |
return EFalse;
|
|
674 |
}
|
|
675 |
else
|
|
676 |
{
|
|
677 |
// This is the old item
|
|
678 |
TSnapshotItem& oldItem = iOldSnapshot->At( index );
|
|
679 |
|
|
680 |
// Status bits must have been changed to allow partial update
|
|
681 |
if ( oldItem.Unread() == currentItem.Unread() )
|
|
682 |
{
|
|
683 |
LOGGER_LEAVEFN( "CChangeFinder::UpdatePartialL" );
|
|
684 |
return EFalse;
|
|
685 |
}
|
|
686 |
|
|
687 |
// Date should be same, otherwise 'just' changed item
|
|
688 |
if ( oldItem.LastChangedDate() == currentItem.LastChangedDate() )
|
|
689 |
{
|
|
690 |
LOGGER_LEAVEFN( "CChangeFinder::UpdatePartialL" );
|
|
691 |
return ETrue;
|
|
692 |
}
|
|
693 |
|
|
694 |
LOGGER_LEAVEFN( "CChangeFinder::UpdatePartialL" );
|
|
695 |
return EFalse;
|
|
696 |
}
|
|
697 |
}
|