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/*
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* Copyright (c) 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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TRACE_FUNC_ENTRY;
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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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iCurrentSnapshot = NULL;
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delete iOldSnapshot;
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iOldSnapshot = NULL;
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TRACE_FUNC_EXIT;
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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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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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LOGGER_WRITE("CChangeFinder::ConstructL, history exists.");
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RReadStream readStream;
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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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TRACE_FUNC_EXIT;
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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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CleanupStack::PopAndDestroy( &readStream );
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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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TRACE_FUNC_EXIT;
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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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TRACE_FUNC_ENTRY;
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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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CleanupStack::PopAndDestroy( &writeStream );
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TRACE_FUNC_EXIT;
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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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// 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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TRACE_FUNC_EXIT;
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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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TRACE_FUNC_ENTRY;
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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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LOGGER_WRITE_1( "CChangeFinder::FindChangedItemsL count: %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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// 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 hash to see whether this was changed
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if ( oldItem.Hash().Compare( currentItem.Hash() ) != 0
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|| oldItem.ParentId() != currentItem.ParentId() )
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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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TRACE_FUNC_EXIT;
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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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TRACE_FUNC_ENTRY;
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if ( !iOldSnapshot )
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{
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LOGGER_WRITE( "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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TRACE_FUNC_EXIT;
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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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TRACE_FUNC_ENTRY;
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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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TRACE_FUNC_EXIT;
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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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TRACE_FUNC_ENTRY;
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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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iOldSnapshot->Compress();
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TRACE_FUNC_EXIT;
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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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TRACE_FUNC_ENTRY;
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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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iOldSnapshot->Compress();
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TRACE_FUNC_EXIT;
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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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{
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TRACE_FUNC_ENTRY;
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LOGGER_WRITE_1( "Updating item %d.", aItem.ItemId() );
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// There must be such entry in the snapshot after this
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// If there isn't old snapshot, we'll create it and add the item
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if ( !iOldSnapshot )
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{
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iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
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ItemAddedL( aItem );
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}
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else
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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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TSnapshotItem& oldItem = iOldSnapshot->At( index );
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oldItem = aItem;
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}
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else
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{
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// There was old snapshot but no such item. Let's add it
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ItemAddedL( aItem );
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}
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}
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iOldSnapshot->Compress();
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TRACE_FUNC_EXIT;
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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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if ( !iCurrentSnapshot )
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{
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LOGGER_WRITE( "CChangeFinder::CommitChangesL leaved, current snapshot missing." );
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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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iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
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}
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// Delete everything from the old snapshot
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iOldSnapshot->Reset();
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// Loop through all the items in current snapshot
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TInt count = iCurrentSnapshot->Count();
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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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442 |
}
|
|
443 |
|
|
444 |
|
|
445 |
// -----------------------------------------------------------------------------
|
|
446 |
// CChangeFinder::CommitChangesL
|
|
447 |
// Commits current changes to snapshot, affects only a specified group of items
|
|
448 |
// -----------------------------------------------------------------------------
|
|
449 |
void CChangeFinder::CommitChangesL( const MSmlDataItemUidSet& aUids )
|
|
450 |
{
|
|
451 |
TRACE_FUNC_ENTRY;
|
|
452 |
|
|
453 |
|
|
454 |
// This function commits changes from current snapshot to old snapshot
|
|
455 |
// But commits only the entries in the parameter array
|
|
456 |
if ( !iCurrentSnapshot )
|
|
457 |
{
|
|
458 |
LOGGER_WRITE( "CChangeFinder::CommitChangesL leaved, current snapshot missing." );
|
|
459 |
User::Leave( KErrNotFound );
|
|
460 |
}
|
|
461 |
|
|
462 |
if ( !iOldSnapshot )
|
|
463 |
{
|
|
464 |
iOldSnapshot = new (ELeave) CSnapshotArray( KSnapshotGranularity );
|
|
465 |
}
|
|
466 |
|
|
467 |
for ( TInt i = 0; i < aUids.ItemCount(); i++ )
|
|
468 |
{
|
|
469 |
TSmlDbItemUid itemId = aUids.ItemAt( i );
|
|
470 |
TSnapshotItem temp( itemId );
|
|
471 |
TInt indexOld( -1 );
|
|
472 |
TInt indexNew( -1 );
|
|
473 |
TInt err = iOldSnapshot->FindIsq( temp, iKey, indexOld);
|
|
474 |
if ( !err )
|
|
475 |
{
|
|
476 |
// founded from old snapshot
|
|
477 |
if ( !iCurrentSnapshot->FindIsq(temp, iKey, indexNew) )
|
|
478 |
{
|
|
479 |
// Replace
|
|
480 |
iOldSnapshot->At( indexOld ) = iCurrentSnapshot->At( indexNew );
|
|
481 |
}
|
|
482 |
else
|
|
483 |
{
|
|
484 |
// not found from current snapshot, delete from old also.
|
|
485 |
iOldSnapshot->Delete( indexOld );
|
|
486 |
}
|
|
487 |
}
|
|
488 |
else
|
|
489 |
{
|
|
490 |
// not found from old snapshot, add it.
|
|
491 |
if ( !iCurrentSnapshot->FindIsq( temp, iKey, indexNew ) )
|
|
492 |
{
|
|
493 |
iOldSnapshot->InsertIsqL( iCurrentSnapshot->At( indexNew ), iKey );
|
|
494 |
}
|
|
495 |
}
|
|
496 |
}
|
|
497 |
TRACE_FUNC_EXIT;
|
|
498 |
}
|
|
499 |
|
|
500 |
// -----------------------------------------------------------------------------
|
|
501 |
// CChangeFinder::SetNewSnapshot
|
|
502 |
// Sets new snapshot (to be compared against), ChangeFinder takes ownership
|
|
503 |
// -----------------------------------------------------------------------------
|
|
504 |
void CChangeFinder::SetNewSnapshot( CSnapshotArray* aNewSnapshot )
|
|
505 |
{
|
|
506 |
TRACE_FUNC_ENTRY;
|
|
507 |
|
|
508 |
// Delete existing snapshot
|
|
509 |
delete iCurrentSnapshot;
|
|
510 |
|
|
511 |
// Set submitted snapshot as active
|
|
512 |
iCurrentSnapshot = aNewSnapshot;
|
|
513 |
iCurrentSnapshot->Compress();
|
|
514 |
|
|
515 |
TRACE_FUNC_EXIT;
|
|
516 |
}
|
|
517 |
|
|
518 |
// -----------------------------------------------------------------------------
|
|
519 |
// CChangeFinder::DataStoreUid
|
|
520 |
// returns stored data store id number
|
|
521 |
// -----------------------------------------------------------------------------
|
|
522 |
TInt64 CChangeFinder::DataStoreUid() const
|
|
523 |
{
|
|
524 |
TRACE_FUNC;
|
|
525 |
return iDataStoreUid;
|
|
526 |
}
|
|
527 |
|
|
528 |
// -----------------------------------------------------------------------------
|
|
529 |
// CChangeFinder::SetDataStoreUid
|
|
530 |
// Sets data store id number
|
|
531 |
// -----------------------------------------------------------------------------
|
|
532 |
void CChangeFinder::SetDataStoreUid( TInt64 aUid )
|
|
533 |
{
|
|
534 |
TRACE_FUNC;
|
|
535 |
iDataStoreUid = aUid;
|
|
536 |
}
|
|
537 |
|