usbclasses/pictbridgeengine/inc/dpsstatemachine.h
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:20:49 +0100
branchRCL_3
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parent 0 1e05558e2206
permissions -rw-r--r--
Revert incorrect RCL_3 drop: Revision: 201033 Kit: 201035
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/*
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* Copyright (c) 2006, 2007 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  This class defines the dps state machine. 
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*
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*/
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#ifndef DPSSTATEMACHINE_H
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#define DPSSTATEMACHINE_H
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#include "dpsconst.h"
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#include "dpsdefs.h"
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class CDpsTransaction;
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class CDpsEngine;
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class CDpsScriptReceiver;
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class MDpsState;
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class TMDpsOperation;
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class CDpsScriptSender;
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/**
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*   This class defines the dps state machine using the state design pattern
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*/
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NONSHARABLE_CLASS(CDpsStateMachine) : public CBase
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    {
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    public:
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        /**
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        *   Two phase constructor
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        *   @param aEngine a pointer to dps engine object
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        *   @return the CDpsOperator instance
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        */
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        static CDpsStateMachine* NewL(CDpsEngine *aEngine);
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        /**
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        *   Destructor
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        */
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        ~CDpsStateMachine();   
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        /**
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        *   Creates the dps transaction. It further calls CreateRequest()
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        *   to create dps device request script.
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        *   @param aParam the dps operation object, passed from UI
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        */
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        void StartTransactionL(TMDpsOperation* aOperation);
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        /**
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        *   Initializes the state machine
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        */
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        void Initialize();
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        /**
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        *   Handles errors
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        */    
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        inline void Error(TInt err);
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        /**
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        *   Notifies script sent
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        */
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        inline void ScriptSentNotifyL(TBool aReply);
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        /**
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        *   Notifies script received
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        */    
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        inline void ScriptReceivedNotifyL(TBool aReply);
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        /**
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        *   Sets the current state
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        *   @param aState the state to be set
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        */    
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        inline void SetState(MDpsState* aState);
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        /**
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        *   Gets the idle state
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        */    
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        inline MDpsState* IdleState() const; 
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        /**
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        *   @return the sending request state object
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        */    
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        inline MDpsState* SendingReqState() const;
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        /**
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        *   @return the waiting for reply state object
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        */    
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        inline MDpsState* WaitingRepState() const;
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        /**
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        *   @return the sending reply state object
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        */    
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        inline MDpsState* SendingRepState() const;
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        /**
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        *   @return the CDpsScriptReceiver object
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        */    
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        inline CDpsScriptReceiver* ScriptReceiver() const;
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        /**
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        *   @return CDpsScriptSender pointer 
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        */
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        inline CDpsScriptSender* ScriptSender() const;
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        /**
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        *   @return the CDpsTransaction object
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        */    
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        inline CDpsTransaction* Trader() const;
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        /**
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        *   @return the current Dps operation enum 
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        */    
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        inline TDpsOperation Operation() const;
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        /**
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        *   Sets the current Dps operation enum
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        *   @param aOp the Dps operation enum to be set
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        */    
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        inline void SetOperation(TDpsOperation aOp);
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        /**
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        *   @return the Dps operation object
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        */    
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        inline TMDpsOperation* MOperation() const;
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        /**
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        *   @return the Dps event enum
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        */    
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        inline TDpsEvent Event() const;
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        /**
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        *   Sets the current Dps event
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        *   @param aEvent the Dps event to be set
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        */    
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        inline void SetEvent(TDpsEvent aEvent);
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        /**
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        *   @return the current state.
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        */
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        inline MDpsState* CurState() const;
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        /**
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        *   @return the dps engine object.
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        */
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        inline CDpsEngine* DpsEngine() const;
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        /**
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        *
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        */
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        inline TInt CurError() const;
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    private:
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        /**
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        *   Default constructor
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        *   @param aEngine a pointer to dps engine object
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        */
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        CDpsStateMachine(CDpsEngine* aEngine);
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        /**
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        *   Two phase constructor. The functions which called in constructor
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        *   and might leave should be called here
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        */
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        void ConstructL();     
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    private:
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        // owned by this class
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        MDpsState* iIdleState;
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        // owned by this class
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        MDpsState* iSendingReqState;
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        // owned by this class
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        MDpsState* iWaitingRepState;
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        // owned by this class
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        MDpsState* iSendingRepState;
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        // pointer to the current state object
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        MDpsState* iCurState;
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        // not owned by this class
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        TMDpsOperation* iMOperation;
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        // not owned by this class  
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        CDpsEngine  *iEngine;
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        // the current dps operation, can be empty
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        TDpsOperation iOperation;
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        // the current dps event, can be empty
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        TDpsEvent iEvent;
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        // the pointer to dps operation object, which takes
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        // care of creating and parsing dps script
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         // owned by this class
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        CDpsTransaction *iTrader;
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        // the pointer to dps script receiving notifier
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        // owned by this class
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        CDpsScriptReceiver* iScriptReceiver;
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        // the pointer to script sender object, owned by this class
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        CDpsScriptSender* iScriptSender;
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        TInt iCurError;
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    };
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#include "dpsstatemachine.inl"
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#endif