supl/supltiapiimplementation/inc/lbssupltirequestmanager.h
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/*
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* Copyright (c) 2002-2005 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: Class to create,manage and destroy requestors for each request
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*
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*/
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#ifndef CLBSSUPLTIREQUESTMANAGER_H
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#define CLBSSUPLTIREQUESTMANAGER_H
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// INCLUDES
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#include <e32std.h>
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#include <e32base.h>
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#include <lbs/lbsnetcommon.h>
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#include <epos_suplterminal.h>
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//FORWARD DECALRATIONS
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class CCLbsSuplTiApiRequestor;
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class COMASuplTrace;
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class MLbsSuplTiObserver;
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// CLASS DECLARATION
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/**
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 * Class:       CCLbsSuplTiRequestManager
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 *
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 * Description: This class creates and manages all CCLbsSuplTiApiRequestor objects
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 *              using for making the location requests. Each time a new request is made
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 *              using the CSuplTiApi::RequestLocation with a new session id, this class 
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 *              creates a new CCLbsSuplTiApiRequestor object which is used to make a
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 *              location request. The ownership of the created object is held 
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 *              by this class in the iRequestorCollection array.
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 */
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class CCLbsSuplTiRequestManager : public CActive
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    {
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public:
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    // Constructors and destructor
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    /**
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     * Destructor for CCLbsSuplTiRequestManager.
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     */
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    ~CCLbsSuplTiRequestManager();
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    /**
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     * Two-phased constructor.
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     */
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    static CCLbsSuplTiRequestManager* NewL(MLbsSuplTiObserver& aObserver);
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    /**
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     * Two-phased constructor.
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     */
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    static CCLbsSuplTiRequestManager* NewLC(MLbsSuplTiObserver& aObserver);
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public:
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    /**
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     * @Description:    Method to make the initial location request.
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     *                  Each time a location request is made this methos
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     *                  searches the iRequestorCollection for the session id.
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     *                  If the session id is not found then creates a new requestor object
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     *                  and initaites the location request.
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     *                  
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     * @param:          aSessionId is the Id of the location request.This id is passed 
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     *                  to the TI API's request id as argument
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     *                  
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     * @param           aOptions should be of type TLbsNetPosRequestOptions.
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     *                  This is used to retrieve the TSuplTerminalQop and 
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     *                  First Req paramaters to be passed to the TI API's 
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     *                  RunSession Method.
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     *                  
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     * @param           aMethod This parameter contains a list of the positioning methods 
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     *                  that should be used to obtain the device's position.
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     *                  This is used to for setCaps to be sent to the RunSession method. 
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     *                  
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     * @return:         None    
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     *
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     */
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    void RequestLocation(const TLbsNetSessionId& aSessionId, const TLbsNetPosRequestOptionsBase& aOptions, const TLbsNetPosRequestMethod& aMethod);
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    /**
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     * @Description:    Method to cancel the request made using the RequestLocation() method.
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     *                  This method searches the iRequestorCollection for the session id.
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     *                  If the session id is found then this method uses the corresponding 
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     *                  requestor object to cancel the asynchronous request.
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     *                  If the session id is not found then it returns an error. 
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     * @param:          aPositionInfo the position value is returned in this
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     * @return:         KErrNone if position retrieved successfully
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     *                  KErrNotFound if session id not found
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     *                  TODO: Other error codes to be put here      
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     *
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     */
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    TInt CancelRequest(const TLbsNetSessionId& aSessionId);
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    /**
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     * @Description:    Method to retrieve the Position obtained for request made
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     *                  using the RequestLocation() method.
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     *                  This method searches the iRequestorCollection for the session id.
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     *                  If the session id is found then this method uses the corresponding 
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     *                  requestor object to retrieve the position present in that requestor.
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     *                  If the session id is not found then it returns an error. 
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     * @param:          aPositionInfo the position value is returned in this
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     * @return:         KErrNone if position retrieved successfully
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     *                  KErrNotFound if session id not found
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     *                  TODO: Other error codes to be put here      
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     *
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     */
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    TInt GetPosition(const TLbsNetSessionId& aSessionId, TPositionInfoBase& aPositionInfo);
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    /*
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     * @Description:    Method to close open sessions with server
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     * @return          None
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     * 
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     */
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    void CloseSession();
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private:
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    // From CActive
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    // Handle completion
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    void RunL();
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    // For cancelling Ashnchronous requests
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    void DoCancel();
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    // Override to handle leaves from RunL().
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    TInt RunError(TInt aError);
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    /**
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     * Constructor for performing 1st stage construction
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     */
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    CCLbsSuplTiRequestManager(MLbsSuplTiObserver& aObserver);
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    /**
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     * EPOC default constructor for performing 2nd stage construction
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     */
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    void ConstructL();
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    /**
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      * @Description:    Method to search and determine if a requestor exists
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      *                  corresponding to a particular session id.
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      *                  Searches the iRequestorCollection for the session id.
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      * @param:          aSessionId Session Id to search
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      * @return:         index of the requestor in the iRequestorCollection array if found
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      *                  KErrNotFound otherwise      
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      *
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      */
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    TInt FindSessionId(const TLbsNetSessionId& aSessionId);
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  	/**
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      * @Description:    Method to initiate the location request once a valid server handle is established.
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      *									 If a valid server handle exists already this method is called to initiate location
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      *									 request.
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      * @param:          none
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      * @return:         none      
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      *
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      */
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    void InitiateLocationRequest();
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private :
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    //To signal completion
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    MLbsSuplTiObserver& iObserver;
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    //Hold a pointer to all requestor objects that were used to make location requests
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    RPointerArray<CCLbsSuplTiApiRequestor> iRequestorCollection;
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    RSuplTerminalServer iServer;
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    /*For Logging*/
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    COMASuplTrace* iTrace;
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    TLbsNetSessionId iSessionId;
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    TLbsNetPosRequestOptionsBase iOptions;
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    TLbsNetPosRequestMethod iMethod;
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    };
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#endif // CLBSSUPLTIREQUESTMANAGER_H