/*

* Copyright (c) 2007-2008 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:  Active object for performing Async filtering

*

*/

#ifndef MULFILTERAO_H_

#define MULFILTERAO_H_

#include <e32base.h>

#include <alf/alfvarianttype.h>

#include <osn/osndefines.h>

#include "mulcallback.h"

namespace osncore

    {

    template <class T> class CAlfPtrVector;  

    class UString;

    }  

using namespace osncore;

namespace Alf

	{

//Forward Declaration

class MulCacheManager;

class MulDataWindow;

class MulFilter;

class IMulFilterDataProvider;

class MulCallback;

class MulFilterAo : public CActive

    {

public: //constructor and destructor

	/**

	 * symbian constcutor

	 * 

	 * @param aModel Model refrence

	 */

	//static MulFilterAo* NewL( IMulFilterDataProvider& aModel );

    /**

     * Destructor

     */

    ~MulFilterAo();

public: //constructor and destructor

	/**

	 * C++ constcutor

	 * 

	 * @param aModel Model refrence

	 */

	MulFilterAo(IMulFilterDataProvider& aModel );   

	/**

	 * symbian Second phase constructor

	 */

	//void ConstructL();

private: //from CActive

	void RunL();

	void DoCancel();

public: //new method

    /**

     * Perform Async filtering. Model call this function when SetFilter is called on Model.

     * After performing async filtering  function will notify model via callback object.

     * 

     * @param aFilter Filter object

     * @param aCallback Callback object

     */

	void DoAsyncFilter(MulFilter& aFilter,MulCallback aCallback);

private:

    /**

     * Perform garbage collection operation

     */

    void DoFilter();

private: //data

	IMulFilterDataProvider& 		mMulModel;

	MulFilter*						mFilter; //not own

	MulCallback						mCallback;

    };

    } //namespace Alf

#endif /*MULFILTERAO_H_*/

//End of file