/*

* 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:  Asynchronous query active object

*

*/

// INCLUDE FILES

#include "mdeasynchronousfindao.h"

#include "mdequeryimpl.h"

#include "mdeenginesession.h"

#include "mdelogiccondition.h"

#include "mdesessionimpl.h"

#include "mdequerycriteriaserialization.h"

#include "mdeinstanceitem.h"

// ========================= MEMBER FUNCTIONS ==================================

CMdEAsynchronousFindAO* CMdEAsynchronousFindAO::NewL( CMdEQuery& aQuery,

    CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession )

    {

    CMdEAsynchronousFindAO* self = CMdEAsynchronousFindAO::NewLC( aQuery, aSessionImpl, aSession );

    CleanupStack::Pop( self );

    return self;

    }

CMdEAsynchronousFindAO* CMdEAsynchronousFindAO::NewLC( CMdEQuery& aQuery,

	    CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession )

    {

    CMdEAsynchronousFindAO* self =

        new ( ELeave ) CMdEAsynchronousFindAO( aQuery, aSessionImpl, aSession );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

void CMdEAsynchronousFindAO::ConstructL()

    {

    }

CMdEAsynchronousFindAO::CMdEAsynchronousFindAO( CMdEQuery& aQuery,

    CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession )

    : CActive( CActive::EPriorityStandard )

    , iQuery( aQuery )

    , iSessionImpl ( aSessionImpl )

    , iSession( aSession )

    , iCountResult( 0 )

    , iConditionBuffer( NULL )

    , iDistinctResults( NULL )

    {

    CActiveScheduler::Add( this );

    }

void CMdEAsynchronousFindAO::DoFindL( TUint aMaxCount, TUint aNotifyCount )

    {    

	CMdEObjectDef* objectDef = NULL;

	RPointerArray<CMdEObjectDef>* objectDefs = NULL;

    RPointerArray<CMdEPropertyDef>* propertyFilter = NULL;

	// get query's internal optimization flags

	TUint32 queryOptimizationFlags = 0;

	iQuery.Conditions().InternalQueryOptimizationFlags(queryOptimizationFlags);

	TQueryResultMode resultMode = iQuery.ResultMode();

    // set property filter and distinct

    if( EQueryTypeObject == iQuery.Type() )

    	{

    	CMdEObjectQuery& objectQuery = (CMdEObjectQuery&)iQuery;

		objectDef = &objectQuery.ObjectDef();

		objectDefs = objectQuery.ObjectDefs();

		// if result mode is objects with freetext

		// change it to normal items for server 

		// (freetext including to results is in query optimization flags)

		if( EQueryResultModeObjectWithFreetexts == resultMode )

			{

			resultMode = EQueryResultModeItem;

			queryOptimizationFlags |= EContainsFreetextCondition;

			}

    	if( EQueryResultModeItem == resultMode || 

    		EQueryResultModeDistinctValues == resultMode )

        	{

        	if( objectQuery.PropertyFilter().Count() > 0 )

        		{        		

        		propertyFilter = &objectQuery.PropertyFilter();

        		}

        	}

        }

    iConditionBuffer = 

    										   iQuery.NamespaceDef(), 

    										   objectDef, 

    										   objectDefs, 

    										   aMaxCount, 

    										   0, // 0 offset because it's not used currently

    										   queryOptimizationFlags, 

    										   iQuery.Conditions(), iQuery.OrderRules(),

    										   propertyFilter );

    iSession.DoFindAsync( 

    	iQuery.GetQueryId(), 

        *iConditionBuffer,

        &iResultSize, 

        iStatus, 

        aNotifyCount );

    SetActive();

    }

CMdEAsynchronousFindAO::~CMdEAsynchronousFindAO()

    {

    Cancel(); // Causes call to DoCancel()

	delete iDistinctResults;

	delete iConditionBuffer;

    iResultList.ResetAndDestroy();

    iResultList.Close();

    iIdResultList.Close();

    }

void CMdEAsynchronousFindAO::RunL()

    {

    // condition buffer can be safely removed now

    if( iConditionBuffer )

    	{

    	delete iConditionBuffer;

    	iConditionBuffer = NULL;

    	}

    // check if client side query is in error state (for example cancelled)

    if( iQuery.State() == CMdEQuery::EStateError )

    	{

    	TRAP_IGNORE( iSession.DoFindCancelL( &iQuery ) );

    	return;

    	}

    const TInt status = iStatus.Int();

    switch ( status )

        {

        case EAsyncFindSetReady:

        case EAsyncFindComplete:

            {            

            // fetch results from server

            CMdCSerializationBuffer* results = CMdCSerializationBuffer::NewLC(iResultSize());

            iSession.DoGetDataL( &iQuery, results, status );

			const TQueryResultMode resultMode = iQuery.ResultMode();

            if ( resultMode == EQueryResultModeItem || resultMode == EQueryResultModeObjectWithFreetexts )

                {

                iSessionImpl.DeserializeQueryResultL( *results, iResultList );

                }

            else if ( resultMode == EQueryResultModeId )

                {

                iSessionImpl.GetItemIdL( results, iIdResultList );

                }

            else if ( resultMode == EQueryResultModeCount )

                {

                iSessionImpl.GetCountL( results, iCountResult );

                }

            else if ( resultMode == EQueryResultModeDistinctValues )

            	{

            	if( iDistinctResults )

            		{            		

            		delete iDistinctResults;

            		iDistinctResults = NULL;

            		}

            	iDistinctResults = new (ELeave) CDesCArrayFlat( 16 );

            	iSessionImpl.GetDistinctValuesL( *results, *iDistinctResults );

            	}

            CleanupStack::PopAndDestroy( results );

            // notify the results

            DoNotifyL( ETrue, status );

            if ( status == EAsyncFindSetReady )

                {

                iResultSize = 0;

                // continue find, fetch next set

                iSession.DoFindContinue( &iQuery, &iResultSize, iStatus );

                SetActive();

                }

            }

            break;

        default:

            {

            // notify of an error

            DoNotifyL( EFalse, status );

            }

            break;

        }

    }

TInt CMdEAsynchronousFindAO::RunError(TInt aError)

	{

	// in error cases make sure that results are cleaned

	iResultList.Reset();

	iIdResultList.Reset();

	delete iDistinctResults;

	iDistinctResults = NULL;

	if( aError == KErrServerTerminated )

		{

		iSessionImpl.NotifyError( aError );

		}

	else

		{

		// cancel query if it's still running

		if( iQuery.State() != EAsyncFindComplete )

			{

			TRAP_IGNORE( iSession.DoFindCancelL( &iQuery ) );

			}

		}

    const TQueryType mode = iQuery.Type();

    switch( mode )

        {

        case EQueryTypeObject: 

            {

            CMdEObjectQueryImpl& qi = (CMdEObjectQueryImpl&)iQuery;

            qi.DoNotifyCompleted( aError );

            break;

            }

        case EQueryTypeRelation:

            {

            CMdERelationQueryImpl& qi = (CMdERelationQueryImpl&)iQuery;

            qi.DoNotifyCompleted( aError );

            break;

            }

        case EQueryTypeEvent:

            {

            CMdEEventQueryImpl& qi = (CMdEEventQueryImpl&)iQuery;

            qi.DoNotifyCompleted( aError );

            break;

            }

        default:

            {

            return KErrNone;

            }

        }

	return KErrNone;

	}

void CMdEAsynchronousFindAO::DoNotifyResultsL( TInt aStatus )

    {

    // Notify result instances

    if ( ( aStatus == EAsyncFindSetReady ||

           aStatus == EAsyncFindComplete ) &&

           iResultList.Count() > 0)

        {

        const TQueryType mode = iQuery.Type();

        switch( mode )

            {

            case EQueryTypeObject:

                {

                CMdEObjectQueryImpl& qi = (CMdEObjectQueryImpl&)iQuery;

                qi.DoNotifyResultsL( iResultList );

                break;

                }

            case EQueryTypeRelation:

                {

                CMdERelationQueryImpl& qi = (CMdERelationQueryImpl&)iQuery;

                qi.DoNotifyResultsL( iResultList );

                break;

                }

            case EQueryTypeEvent:

                {

                CMdEEventQueryImpl& qi = (CMdEEventQueryImpl&)iQuery;

                qi.DoNotifyResultsL( iResultList );

                break;

                }

            default:

                {

                // Nothing to do

                }

            }

        // get rid of local results list

        iResultList.Reset();

        iResultList.Compress();

        }

    // Notify result ids

    else if ( ( aStatus == EAsyncFindSetReady ||

           aStatus == EAsyncFindComplete ) &&

           iIdResultList.Count() > 0)

        {

        const TQueryType mode = iQuery.Type();

        switch( mode )

            {

            case EQueryTypeObject:

                {

                CMdEObjectQueryImpl& qi = (CMdEObjectQueryImpl&)iQuery;

                qi.DoNotifyResultsL( iIdResultList );

                break;

                }

            case EQueryTypeRelation:

                {

                CMdERelationQueryImpl& qi = (CMdERelationQueryImpl&)iQuery;

                qi.DoNotifyResultsL( iIdResultList );

                break;

                }

            case EQueryTypeEvent:

                {

                CMdEEventQueryImpl& qi = (CMdEEventQueryImpl&)iQuery;

                qi.DoNotifyResultsL( iIdResultList );

                break;

                }

            default:

                {

                // Nothing to do

                }

            }

        // get rid of local results list

        iIdResultList.Reset();

        }

    else if ( iQuery.ResultMode() == EQueryResultModeCount )

        {

        const TQueryType mode = iQuery.Type();

        switch( mode )

            {

            case EQueryTypeObject:

                {

                CMdEObjectQueryImpl& qi = (CMdEObjectQueryImpl&)iQuery;

                qi.DoNotifyResults( iCountResult );

                break;

                }

            case EQueryTypeRelation:

                {

                CMdERelationQueryImpl& qi = (CMdERelationQueryImpl&)iQuery;

                qi.DoNotifyResults( iCountResult );

                break;

                }

            case EQueryTypeEvent:

                {

                CMdEEventQueryImpl& qi = (CMdEEventQueryImpl&)iQuery;

                qi.DoNotifyResults( iCountResult );

                break;

                }

            default:

                {

                // Nothing to do

                }

            }

        }

    else if ( ( aStatus == EAsyncFindSetReady ||

           aStatus == EAsyncFindComplete ) &&

           iDistinctResults && iQuery.ResultMode() == EQueryResultModeDistinctValues )

    	{

    	CMdEObjectQueryImpl& qi = (CMdEObjectQueryImpl&)iQuery;    	

    	qi.DoNotifyResultsL( *iDistinctResults );

    	delete iDistinctResults;

    	iDistinctResults = NULL;

    	}

    }

void CMdEAsynchronousFindAO::DoNotifyL( TBool aNewResults, TInt aStatus )

	{

	if( aNewResults )

		{

		DoNotifyResultsL( aStatus );

		}

    // Notify complete

    if ( aStatus != EAsyncFindSetReady )

        {

        const TInt code = ( aStatus == EAsyncFindComplete ? KErrNone : aStatus );

        const TQueryType mode = iQuery.Type();

        switch( mode )

            {

            case EQueryTypeObject:

                {

                CMdEObjectQueryImpl& qi = (CMdEObjectQueryImpl&)iQuery;

                qi.DoNotifyCompleted( code );

                break;

                }

            case EQueryTypeRelation:

                {

                CMdERelationQueryImpl& qi = (CMdERelationQueryImpl&)iQuery;

                qi.DoNotifyCompleted( code );

                break;

                }

            case EQueryTypeEvent:

                {

                CMdEEventQueryImpl& qi = (CMdEEventQueryImpl&)iQuery;

                qi.DoNotifyCompleted( code );

                break;

                }

            default:

                {

                // Nothing to do

                }

            }

        }

    if( aStatus == KErrServerTerminated )

    	{

    	iSessionImpl.NotifyError( aStatus );

    	}

    }

void CMdEAsynchronousFindAO::DoCancel()

    {

    TRAP_IGNORE( iSession.DoFindCancelL( &iQuery ) );

    }

// End of File