// Copyright (c) 2008-2009 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:

//

#ifndef __SSMSWPINDIVIDUALTRANSITIONSCHEDULER_H__

#define __SSMSWPINDIVIDUALTRANSITIONSCHEDULER_H__

#include <e32base.h>

class CSsmSwpTransitionEngine;

class MSwpSchedulerMonitor;

class CSsmSwpTransitionScheduler;

/**

 The scheduler class is responsible for submitting and scheduling transitions sequencially

 If  transition is active, the scheduler will queue the transition until all active 

 and queued transitions have been completed.

 @internalComponent

 @released

 */

class CSsmSwpIndividualTransitionScheduler : public CActive

	{

public:

	// methods

	static CSsmSwpIndividualTransitionScheduler* NewLC(TUint aSwpKey, MCleSessionProxy* aCleSession, CSsmSwpTransitionScheduler& aParent);

	~CSsmSwpIndividualTransitionScheduler();

	void SubmitL(CSsmSwpTransitionEngine* aEngine); // takes ownership

	void Cancel(CSession2* aSession);

	TUint SwpKey() const;

	TBool IsIdle() const;

protected: 

	//from CActive

	void DoCancel();

	void RunL();

	TInt RunError(TInt aError);

private:

	// methods

	CSsmSwpIndividualTransitionScheduler(TUint aSwpKey, CSsmSwpTransitionScheduler& aParent); // only accessible from factory methods

	void ConstructL(MCleSessionProxy* aCleSession);

	void DoSubmitL(CSsmSwpTransitionEngine* aEngine);

	void ScheduleTransition();

	CSsmSwpTransitionEngine* GetNextFromQueue();

	void DestroyTransitionQueue();

	void CancelTransitionQueue(CSession2* aSession);

	TBool CurrentTransitionOriginatesFrom(CSession2* aSession);

	void NotifyTransitionQueued();

	void NotifyTransitionStarted();

	void NotifyTransitionCompleted();

	void NotifyTransitionFailed();

private:

	// constant types

	enum TSchedulerStates

		{

		EIdle,

		ERunningTransition

		};

private:

	// members

	RPointerArray<CSsmSwpTransitionEngine> iTransitionQueue;

	CSsmSwpTransitionEngine* iCurrentTransition;

	TSchedulerStates iSchedulerState;

	CSession2* iCancellingSession;

	MCleSessionProxy* iCleSession;

	CSsmSwpPolicyCliSession* iSsmSwpPolicySession;

	TUint iSwpKey;

	CSsmSwpTransitionScheduler& iParent;

	};

#endif