author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:05:37 +0300 | |
branch | RCL_3 |
changeset 51 | 8e7494275d3a |
permissions | -rw-r--r-- |
51
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/* |
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* Copyright (c) 2008-2010 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 ContactsGroup Plug In Adapter |
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* |
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*/ |
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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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|
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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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// ----------------------------------------------------------------------------- |
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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, |
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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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{ |
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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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TRACE_FUNC_ENTRY; |
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delete iOldSnapshot; |
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delete iCurrentSnapshot; |
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TRACE_FUNC_EXIT; |
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} |
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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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TRACE_FUNC_ENTRY; |
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iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity ); |
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iCurrentSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity ); |
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LOGGER_WRITE("CChangeFinder::ConstructL, CSnapshotArray:s created"); |
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TUid uid = {iStreamUid}; |
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aHasHistory = iSyncRelationship.IsStreamPresentL( uid ); |
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|
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if ( aHasHistory ) |
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{ |
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LOGGER_WRITE("CChangeFinder::ConstructL, HasHistory"); |
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// Open stream for reading |
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RReadStream readStream; |
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iSyncRelationship.OpenReadStreamLC( readStream, uid ); |
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|
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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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TRACE_FUNC_EXIT; |
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return; |
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} |
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else |
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{ |
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LOGGER_WRITE("CChangeFinder::ConstructL, format is OK"); |
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} |
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|
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// Read item count |
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TInt count = readStream.ReadUint32L(); |
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|
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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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iOldSnapshot->Compress(); |
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|
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LOGGER_WRITE_1("iOldSnapshot done, iOldSnapshot->Count: %d", iOldSnapshot->Count() ); |
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CleanupStack::PopAndDestroy( &readStream ); // readStream |
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} |
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else |
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114 |
{ |
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LOGGER_WRITE("CChangeFinder::ConstructL, no sync history."); |
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} |
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|
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TRACE_FUNC_EXIT; |
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} |
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120 |
|
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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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126 |
{ |
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TRACE_FUNC_ENTRY; |
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|
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RWriteStream writeStream; |
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|
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TUid uid = {iStreamUid}; |
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132 |
|
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// Open write stream |
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iSyncRelationship.OpenWriteStreamLC( writeStream, uid ); |
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135 |
|
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// Write used format version |
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writeStream.WriteUint32L( KSnapshotFormatVersion ); |
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138 |
|
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// Write item count |
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TInt count = iOldSnapshot->Count(); |
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writeStream.WriteUint32L( count ); |
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142 |
|
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// Write items |
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for ( TInt i = 0; i < count; i++ ) |
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145 |
{ |
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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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149 |
|
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writeStream.CommitL(); |
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CleanupStack::PopAndDestroy( &writeStream ); // writeStream |
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|
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TRACE_FUNC_EXIT; |
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} |
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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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TRACE_FUNC_ENTRY; |
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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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|
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TRACE_FUNC_EXIT; |
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} |
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171 |
|
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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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177 |
{ |
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TRACE_FUNC_ENTRY; |
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aChangedUids.Reset(); |
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|
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TInt index; |
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TInt count = iCurrentSnapshot->Count(); |
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LOGGER_WRITE_1( "CChangeFinder::FindChangedItemsL items on iCurrentSnapshot: %d", 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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|
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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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190 |
{ |
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// This is the old item |
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TSnapshotItem& oldItem = iOldSnapshot->At( index ); |
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if ( currentItem.Hash().Compare( oldItem.Hash() ) != 0 ) |
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194 |
{ |
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// add to list |
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User::LeaveIfError( aChangedUids.AddItem( currentItem.ItemId() ) ); |
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} |
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} |
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} |
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200 |
|
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TRACE_FUNC_EXIT; |
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} |
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203 |
|
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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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TRACE_FUNC_ENTRY; |
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aDeletedUids.Reset(); |
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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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|
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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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User::LeaveIfError( 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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User::LeaveIfError( 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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|
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TRACE_FUNC_EXIT; |
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} |
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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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241 |
{ |
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TRACE_FUNC_ENTRY; |
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aNewUids.Reset(); |
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|
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TInt index; |
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TInt count = iCurrentSnapshot->Count(); |
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LOGGER_WRITE_1( "iCurrentSnapshot->Count(): %d", count ); |
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LOGGER_WRITE_1( "iOldSnapshot->Count(): %d", iOldSnapshot->Count() ); |
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for ( TInt i=0; i < count; i++ ) |
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250 |
{ |
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const TSnapshotItem& currentItem = iCurrentSnapshot->At( i ); |
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252 |
|
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// If there's no old snapshot, all items are new |
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if ( !iOldSnapshot ) |
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255 |
{ |
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User::LeaveIfError( aNewUids.AddItem( currentItem.ItemId() ) ); |
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LOGGER_WRITE_1( "!iOldSnapshot, 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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261 |
{ |
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User::LeaveIfError( 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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265 |
} |
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266 |
|
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TRACE_FUNC_EXIT; |
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} |
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|
269 |
|
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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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TRACE_FUNC_ENTRY; |
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LOGGER_WRITE_1( "Adding item %d.", aItem.ItemId() ); |
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|
278 |
|
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iOldSnapshot->InsertIsqL( aItem, iKey ); |
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iOldSnapshot->Compress(); |
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|
281 |
|
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282 |
TRACE_FUNC_EXIT; |
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|
283 |
} |
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|
284 |
|
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|
285 |
// ----------------------------------------------------------------------------- |
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286 |
// CChangeFinder::ItemDeleted |
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// Removes item from snapshot, this item is no longer considered deleted |
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|
288 |
// ----------------------------------------------------------------------------- |
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void CChangeFinder::ItemDeleted( const TSnapshotItem& aItem ) |
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290 |
{ |
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291 |
TRACE_FUNC_ENTRY; |
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|
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LOGGER_WRITE_1( "deleting item %d.", aItem.ItemId() ); |
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|
293 |
|
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|
294 |
// Delete item from the old snapshot |
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295 |
TInt index; |
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|
296 |
if ( iOldSnapshot->FindIsq( aItem, iKey, index ) == KErrNone ) |
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|
297 |
{ |
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|
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iOldSnapshot->Delete( index ); |
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|
299 |
} |
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|
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else // Skip, there wasn't such entry |
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|
301 |
{ |
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|
302 |
LOGGER_WRITE( "iOldSnapshot->FindIsq, item was not found." ); |
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|
303 |
} |
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|
304 |
|
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|
305 |
TRACE_FUNC_EXIT; |
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|
306 |
} |
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diff
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|
307 |
|
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|
308 |
// ----------------------------------------------------------------------------- |
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|
309 |
// CChangeFinder::ItemUpdatedL |
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|
310 |
// Updates item to snapshot, this item is no longer considered changed |
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|
311 |
// ----------------------------------------------------------------------------- |
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void CChangeFinder::ItemUpdatedL( const TSnapshotItem& aItem ) |
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{ |
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TRACE_FUNC_ENTRY; |
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LOGGER_WRITE_1( "Updating item %d.", aItem.ItemId() ); |
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|
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// Update item in 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->At( index ) = aItem; |
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} |
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323 |
else |
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{ |
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// There was no such item. Let's add it |
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ItemAddedL( aItem ); |
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} |
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TRACE_FUNC_EXIT; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CChangeFinder::CommitChangesL |
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// Commits current changes to snapshot |
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// ----------------------------------------------------------------------------- |
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void CChangeFinder::CommitChangesL() |
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{ |
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TRACE_FUNC_ENTRY; |
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|
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// Delete everything from the old snapshot |
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iOldSnapshot->Reset(); |
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|
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// Loop through all the items in current snapshot |
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TInt count = iCurrentSnapshot->Count(); |
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|
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// Copy everything from current to old snapshot |
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for ( TInt i = 0; i < count; i++ ) |
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{ |
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// Commit it to the old array. |
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iOldSnapshot->InsertIsqL( iCurrentSnapshot->At( i ), iKey ); |
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} |
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TRACE_FUNC_EXIT; |
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} |
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353 |
|
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// ----------------------------------------------------------------------------- |
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355 |
// CChangeFinder::CommitChangesL |
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// Commits current changes to snapshot, affects only a specified group of items |
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// ----------------------------------------------------------------------------- |
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void CChangeFinder::CommitChangesL( const MSmlDataItemUidSet& aUids ) |
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359 |
{ |
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TRACE_FUNC_ENTRY; |
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361 |
|
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// This function commits changes from current snapshot to old snapshot |
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// But commits only the entries in the parameter array |
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|
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for ( TInt i = 0; i < aUids.ItemCount(); i++ ) |
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366 |
{ |
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TSmlDbItemUid itemId = aUids.ItemAt( i ); |
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TSnapshotItem temp( itemId ); |
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TInt indexOld( -1 ); |
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TInt indexNew( -1 ); |
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if ( !iOldSnapshot->FindIsq( temp, iKey, indexOld) ) |
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372 |
{ |
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if ( !iCurrentSnapshot->FindIsq(temp, iKey, indexNew) ) |
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374 |
{ |
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// Replace, moved or softdeleted |
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iOldSnapshot->At( indexOld ) = iCurrentSnapshot->At( indexNew ); |
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377 |
} |
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378 |
else |
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379 |
{ |
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// Delete |
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iOldSnapshot->Delete( indexOld ); |
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382 |
} |
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383 |
} |
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|
384 |
else |
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|
385 |
{ |
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386 |
// Add |
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if ( !iCurrentSnapshot->FindIsq( temp, iKey, indexNew ) ) |
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|
388 |
{ |
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iOldSnapshot->InsertIsqL( iCurrentSnapshot->At( indexNew ), iKey ); |
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|
390 |
} |
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391 |
} |
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392 |
} |
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393 |
TRACE_FUNC_EXIT; |
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394 |
} |
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|
395 |
|
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396 |
// ----------------------------------------------------------------------------- |
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397 |
// CChangeFinder::SetNewSnapshot |
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398 |
// Sets new snapshot (to be compared against), ChangeFinder takes ownership |
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|
399 |
// ----------------------------------------------------------------------------- |
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400 |
void CChangeFinder::SetNewSnapshot( CSnapshotArray* aNewSnapshot ) |
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|
401 |
{ |
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402 |
TRACE_FUNC; |
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|
403 |
|
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|
404 |
// Delete existing snapshot |
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|
405 |
delete iCurrentSnapshot; |
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|
406 |
|
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|
407 |
// Set submitted snapshot as active |
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|
408 |
iCurrentSnapshot = aNewSnapshot; |
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|
409 |
TRACE_FUNC_EXIT; |
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410 |
} |