/*

* Copyright (c) 2006 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:  Data handler

*

*/

#ifndef CSENSRVCONDITIONHANDLER_H

#define CSENSRVCONDITIONHANDLER_H

#include <e32base.h>

#include "sensrvclient.h"

class MSensrvConditionHandlerObserver;

/**

 *  Condition handler class

 *

 *  @lib SensorClient.lib

 *  @since S60 5.0

 */

NONSHARABLE_CLASS( CSensrvConditionHandler ) : public CActive

    {

    public:

        static CSensrvConditionHandler* NewL( RSensrvClient& aSensrvClient, 

                                              const TSensrvChannelInfo& aChannelInfo );

        static CSensrvConditionHandler* NewLC( RSensrvClient& aSensrvClient, 

                                               const TSensrvChannelInfo& aChannelInfo );

        virtual ~CSensrvConditionHandler();

    public:

        /*

        * Start condition listening. Send request to server.

        *

        * @since S60 5.0

        * @param aConditionObserver Condition listener for channel.

        * @param aListeningParameters Listening parameters

        */

        void StartListening( MSensrvConditionHandlerObserver* aConditionObserver,

                             TSensrvStartListeningParameters aListeningParameters );

        /**

        * Blocks sending async message.

        *

        * @since S60 5.0

        */

        inline void BlockAsyncMessage() { iListening = EFalse; };

    protected: // From CActive

          void DoCancel();

          void RunL();

          TInt RunError(TInt aError);

    private:

        CSensrvConditionHandler( RSensrvClient& aSensrvClient,  const TSensrvChannelInfo& aChannelInfo  );

        void ConstructL();

        /**

        * Create and send request to server

        */

        void CreateAndSendRequest();

    private: // data

        /**

        * Client

        */

        RSensrvClient& iSensrvClient;

        /**

        * Condition listener

        * Not own.

        */

        MSensrvConditionHandlerObserver* iConditionObserver;

        /**

        * Channel info

        */

        TSensrvChannelInfo iChannelInfo;

        /**

        * Error count

        */

        TInt iErrorCount;

        /**

        * Listening parameters

        */

        TSensrvStartListeningParameters iListeningParameters;

        /**

        * Condition set id that was met is returned in this buffer.

        */

        TSensrvTIntPckgBuf iMetSetIdBuf;

        /**

        * Server writes the data value that was met here

        * Own.

        */

        HBufC8* iWriteBuffer;

        /**

        * Pointer to iWriteBuffer data

        * Own

        */

        TPtr8* iWriteBufferPtr;

        /**

        * Indicates logical listening status

        */

        TBool iListening;

    };

#endif // CSENSRVCONDITIONHANDLER_H