/*

* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Manages object search from database*

*/

#include "mdsfindengine.h"

#include "mdcresult.h"

#include "mdcitem.h"

#include "mdsdbconnectionpool.h"

#include "mdsobjectlocklist.h"

#include "mdsserversession.h"

#include "mdsfindsequence.h"

#include "mdslogger.h"

#include "mdcserializationbuffer.h"

#include "mdsschema.h"

#include "mdsserver.h"

__USES_LOGGER

// ---------------------------------------------------------------------------

// NewL

// ---------------------------------------------------------------------------

//

CMdSFindEngine* CMdSFindEngine::NewL(

	TUint32 aQueryId, 

    CMdSServerSession& aParent,

    CMdSObjectLockList& aLockList,

    CMdsSchema& aSchemaNew )

    {

    CMdSFindEngine* self = CMdSFindEngine::NewLC(

        aQueryId, aParent, aLockList, aSchemaNew );

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// NewLC

// ---------------------------------------------------------------------------

//

CMdSFindEngine* CMdSFindEngine::NewLC(

	TUint32 aQueryId, 

    CMdSServerSession& aParent,

    CMdSObjectLockList& aLockList,

    CMdsSchema& aSchemaNew )

    {

    CMdSFindEngine* self = new ( ELeave ) CMdSFindEngine(

        aQueryId, aParent, aLockList );

    CleanupStack::PushL( self );

    self->ConstructL( aSchemaNew );

    return self;

    }

// ---------------------------------------------------------------------------

// Default constructor

// ---------------------------------------------------------------------------

//

CMdSFindEngine::CMdSFindEngine(

	TUint32 aQueryId, 

    CMdSServerSession& aParent,

    CMdSObjectLockList& aLockList )

    : iQueryId( aQueryId )

    , iParent( aParent )

    , iLockList( aLockList )

    , iSequence( NULL )

    , iSerializedCriteria( NULL )

    , iAsyncPending( EFalse )

    {

    }

// ---------------------------------------------------------------------------

// ConstructL

// ---------------------------------------------------------------------------

//

void CMdSFindEngine::ConstructL( CMdsSchema& aSchema )

    {

    iSequence = CMdSFindSequence::NewL( iParent.GetServer(), aSchema, *this );

    }

// ---------------------------------------------------------------------------

// QueryId

// ---------------------------------------------------------------------------

//

TUint32 CMdSFindEngine::QueryId()

	{

	return iQueryId;

	}

// ---------------------------------------------------------------------------

// SetFindParams

// ---------------------------------------------------------------------------

//

void CMdSFindEngine::SetFindParams( TUint32 aNotifyCount )

    {

    iSequence->SetFindParams( aNotifyCount );

    }

// ---------------------------------------------------------------------------

// SetFindCriteria

// ---------------------------------------------------------------------------

//

void CMdSFindEngine::SetFindCriteria( CMdCSerializationBuffer* aSerializedCriteria )

    {

    iSerializedCriteria = aSerializedCriteria;

    }

// ---------------------------------------------------------------------------

// CreateResultSetL

// ---------------------------------------------------------------------------

//

void CMdSFindEngine::CreateResultSet(RMessage2 aMessage)

    {

    iMessage = aMessage;

    }

// ---------------------------------------------------------------------------

// Destructor

// ---------------------------------------------------------------------------

//

CMdSFindEngine::~CMdSFindEngine()

    {

   	delete iSerializedCriteria;

   	delete iSequence;

    }

// ---------------------------------------------------------------------------

// FindL

// ---------------------------------------------------------------------------

//

TInt CMdSFindEngine::FindL( TUserLevel aUserLevel )

    {

    const TInt result = iSequence->FindL( *iSerializedCriteria, aUserLevel );

    if( result == KErrNone && iMessage.IsNull() == EFalse )

    	{

    	TPckgBuf<TInt> sizeBuf( iSequence->ResultsL().Size() );

    	iMessage.WriteL( 2, sizeBuf );

    	}

    return result;

    }

// ---------------------------------------------------------------------------

// ContinueL

// ---------------------------------------------------------------------------

//

TInt CMdSFindEngine::ContinueL()

    {

    const TInt result = iSequence->ContinueL();

    if( result == KErrNone && iMessage.IsNull() == EFalse )

    	{

    	TPckgBuf<TInt> sizeBuf( iSequence->ResultsL().Size() );

    	iMessage.WriteL( 2, sizeBuf );

    	}

    return result;

    }

// ---------------------------------------------------------------------------

// FindAsyncL

// ---------------------------------------------------------------------------

//

void CMdSFindEngine::FindAsyncL( TUserLevel aUserLevel )

    {

    iAsyncPending = ETrue;

    iSequence->FindAsync( *iSerializedCriteria, aUserLevel );

    }

// ---------------------------------------------------------------------------

// ContinueAsync

// ---------------------------------------------------------------------------

//

void CMdSFindEngine::ContinueAsync()

    {

    iAsyncPending = ETrue;

    iSequence->ContinueAsync();

    }

// ---------------------------------------------------------------------------

// Cancel

// ---------------------------------------------------------------------------

//

void CMdSFindEngine::Cancel( TInt aError )

    {

    TBool toComplete = iAsyncPending;

    iAsyncPending = EFalse;

    iSequence->Cancel();

    if( iMessage.IsNull() == EFalse )

    	{

    	if ( toComplete ) 

    		{

    		iMessage.Complete( KErrCancel );

    		}

    	else 

    		{

    		iMessage.Complete( aError );

    		}

    	}

    }

// ---------------------------------------------------------------------------

// SetComplete

// ---------------------------------------------------------------------------

//

    {

    TBool toComplete = iAsyncPending;

    if( aError == KErrNone )

        {

        TUint32 resultSize = 0;

        TInt err = KErrNone;

        TRAP( err, resultSize = iSequence->ResultsL().Size() );

       	if( err )

       		{

       		if ( toComplete && iMessage.IsNull() == EFalse ) 

       			{

       			iMessage.Complete( err );

       			}

       		return;

       		}

        iAsyncPending = EFalse;

       	if ( iMessage.IsNull() == EFalse )

       		{

       		TPckgBuf<TInt> sizeBuf( resultSize );

       		err = iMessage.Write( 2, sizeBuf );

       		}

       	if( err )

       		{

       		if ( toComplete && iMessage.IsNull() == EFalse ) 

       			{

       			iMessage.Complete( err );

       			}

       		return;

       		}

       	else

       		{        	

       		if ( toComplete && iMessage.IsNull() == EFalse ) 

       			{

       			}

       		}

        }

    else

        {

       	if ( toComplete && iMessage.IsNull() == EFalse ) 

       		{

       		iMessage.Complete( aError );

       		}

       	return;

        }

    }

const CMdCSerializationBuffer& CMdSFindEngine::ResultsL() const

	{

	return iSequence->ResultsL();

	}

void CMdSFindEngine::SetResultMode( TBool aResultModeItems )

	{

	iLastResultModeItems = aResultModeItems;

	}

TBool CMdSFindEngine::IsComplete() const

	{

	if( iSequence )

		{		

		return iSequence->IsComplete();

		}

	else

		{

		return ETrue;

		}

	}

TBool CMdSFindEngine::IsQueryComplete()

	{

	if( iSequence )

		{		

		return iSequence->IsQueryComplete();

		}

	else

		{

		return ETrue;

		}

	}	

CMdSServer& CMdSFindEngine::GetServer() const

	{

	return iParent.GetServer();

	}

void CMdSFindEngine::LockFindResultObjectsL( CMdSObjectLockList& aLockList )

	{

	if (!iLastResultModeItems)

		{

		return;

		}

	CMdsSchema& schema = iParent.GetServer().Schema();

	CMdCSerializationBuffer& buffer = iSequence->ResultsL();

	buffer.PositionL( KNoOffset );

	TMdCItems items;

	items.DeserializeL( buffer );

	const CMdsNamespaceDef* namespaceDef = schema.GetNamespaceByIdL( items.iNamespaceDefId );

	for(TInt32 i = 0; i < items.iObjects.iPtr.iCount; ++i)

		{

		buffer.PositionL( items.iObjects.iPtr.iOffset + i * sizeof(TMdCObject) );

		TMdCObject object;

		object.DeserializeL( buffer );

		if ( aLockList.IsLocked( *namespaceDef, object.iId ) )

			{

			object.iFlags &= ~EMdEObjectFlagModOpen;

			}

		else

			{

			aLockList.LockObjectL( iParent, *namespaceDef, object.iId );

			object.iFlags |= EMdEObjectFlagModOpen;

			}

		buffer.PositionL( items.iObjects.iPtr.iOffset + i * sizeof(TMdCObject) );

		object.SerializeL( buffer );

		}

	}