author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 15 Jul 2010 19:36:11 +0300 | |
branch | RCL_3 |
changeset 58 | 4af31167ea77 |
parent 0 | b497e44ab2fc |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 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: Asynchronous request handlers for DS host server. |
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* |
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*/ |
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#ifndef __NSMLDSASYNCREQUESTHANDLER_H__ |
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#define __NSMLDSASYNCREQUESTHANDLER_H__ |
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// INCLUDES |
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#include <e32base.h> |
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#include <nsmldsconstants.h> |
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#include <nsmlconstants.h> |
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#include "nsmldshostconstants.h" |
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#include "nsmldshostitem.h" |
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#include "nsmldsitemmodificationset.h" |
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// FORWARD DECLARATIONS |
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class CNSmlDSHostSession; |
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class CSmlDataStore; |
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struct TNSmlDSDataStoreElement; |
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struct TNSmlDSDataProviderElement; |
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class CNSmlAdapterLog; |
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|
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// CLASS DECLARATION |
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// ------------------------------------------------------------------------------------------------ |
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// Base class for asynchronous request handlers. |
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// |
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// @lib nsmldshostserver.lib |
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// ------------------------------------------------------------------------------------------------ |
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class CNSmlDSAsyncRequestHandler : public CActive |
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{ |
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public: // destructor |
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/** |
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* C++ default destructor. |
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*/ |
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virtual ~CNSmlDSAsyncRequestHandler(); |
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public: // New functions |
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/** |
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* Initializes the object for asynchronous calls. |
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* @return CSmlDataStore&. The asynchronous service provider for the request. |
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*/ |
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CSmlDataStore& CallDSAsyncLC(); |
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/** |
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* Pushes item to cleanupstack, item, which sets the request status |
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* on leave CleanupStack::PopAndDestroy() |
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*/ |
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void SetRequestStatusOnLeaveLC(); |
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/** |
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* Called when the item pushed in CNSmlDSAsyncCallBackForOpen::SetRequestStatusOnLeaveLC() is |
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* destroyed from the cleanupstack. Sets the request status. |
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* @param aP. instance of CNSmlDSAsyncCallBackForOpen. |
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*/ |
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static void SetRequestStatusOnLeaveCleanup( TAny* aP ); |
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public: // Functions from base classes |
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/** |
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* calls CActive::SetActive(). |
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*/ |
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void SetActive(); |
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protected: |
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/** |
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* A C++ constructor of this class. |
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* @param aPriority. The priority of the active object, |
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* @param aSession. The session object of the request. |
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* @param aDSItem. contains the data store, which provides the asynchronous service. |
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* @param aMessage. The message associated with the request. |
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*/ |
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CNSmlDSAsyncRequestHandler(TInt aPriority, |
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CNSmlDSHostSession* aSession, |
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TNSmlDSDataStoreElement* aDSItem, |
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const RMessagePtr2& aMessage ); |
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/** |
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* Adds object to Active scheduler. |
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*/ |
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void AddToSchedulerL(); |
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private: //Functions from base class |
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TInt RunError(TInt aError); |
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public: //Data |
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CNSmlDSHostSession* iSession; //session for request. |
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TNSmlDSDataStoreElement* iDSItem; //data store for request |
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RMessagePtr2 iMessage; //message for request. |
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}; |
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// ------------------------------------------------------------------------------------------------ |
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// Asynchronous request handler, that calls callback method, when request finishes. |
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// |
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// @lib nsmldshostserver.lib |
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// ------------------------------------------------------------------------------------------------ |
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class CNSmlDSAsyncCallBack : public CNSmlDSAsyncRequestHandler |
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{ |
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public: //DATA TYPES |
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enum TCallBackOperation |
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{ |
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EFinished = 0, |
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ECanceled, |
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EFree |
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}; |
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typedef TInt (CNSmlDSHostSession::*RequestFinishedFunction) |
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(CNSmlDSAsyncCallBack* aDSAO, CNSmlDSAsyncCallBack::TCallBackOperation aOperation); |
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public: //Constructors and destructors |
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129 |
|
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/** |
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* A C++ constructor of this class. |
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* @param aSession. The session object of the request. |
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* @param aDSItem. Contains the data store, which provides the asynchronous service. |
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* @param aMessage. The message associated with the request. |
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* @param aReqFinishedFunc.the call back function this object calls, when request completes. |
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* @param aPtr. Pointer to request specific data. |
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*/ |
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CNSmlDSAsyncCallBack( CNSmlDSHostSession* aSession, |
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TNSmlDSDataStoreElement* aDSItem, |
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const RMessage2& aMessage, |
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RequestFinishedFunction aReqFinishedFunc = NULL, |
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TAny* aPtr = NULL ); |
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/** |
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* C++ destructor |
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*/ |
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virtual ~CNSmlDSAsyncCallBack(); |
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|
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private: // Functions from base classes |
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149 |
|
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void DoCancel(); |
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void RunL(); |
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|
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public: |
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|
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TAny* iPtr; // request specific data. |
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|
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protected: |
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|
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RequestFinishedFunction iReqFinishedFunc; |
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}; |
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|
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// ------------------------------------------------------------------------------------------------ |
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// Asynchronous request handler for CSmlDataStore::Open |
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// |
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// @lib nsmldshostserver.lib |
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// ------------------------------------------------------------------------------------------------ |
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class CNSmlDSAsyncCallBackForOpen : public CNSmlDSAsyncCallBack |
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{ |
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public: //Constructor |
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/** |
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* A C++ constructor of this class. |
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* @param aSession. The session object of the request. |
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* @param aMessage. The message associated with the request. |
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* @param aReqFinishedFunc. the call back function this object calls, when request completes. |
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*/ |
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CNSmlDSAsyncCallBackForOpen( CNSmlDSHostSession* aSession, |
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const RMessage2& aMessage, |
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RequestFinishedFunction aReqFinishedFunc = NULL ); |
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|
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public: //Data |
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|
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TNSmlDSDataProviderElement* iDpi; //Data provider for request |
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HBufC* iServerId; |
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HBufC* iRemoteDB; |
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}; |
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// ------------------------------------------------------------------------------------------------ |
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// Asynchronous request handler for fetching all changed items. |
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// |
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// @lib nsmldshostserver.lib |
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// ------------------------------------------------------------------------------------------------ |
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class CNSmlDSChangedItemsFetcher : public CNSmlDSAsyncRequestHandler |
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{ |
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public: //DATA TYPES |
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typedef void ( CNSmlDSHostSession::*RequestFinishedFunction ) |
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( CNSmlDSChangedItemsFetcher* aDSAO ); |
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public:// Constructor and destructor |
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|
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/** |
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* Creates new instance of the CNSmlDSChangedItemsFetcher and pushed it to the cleanup stack. |
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* @param aSession. The session object of the request. |
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* @param aDSItem. Contains the data store, which provides the asynchronous service. |
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* @param aMessage. The message associated with the request. |
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* @param aReqFinishedFunc. The call back function this object calls, when request completes. |
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* @return CNSmlDSChangedItemsFetcher*. Newly created instance. |
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*/ |
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static CNSmlDSChangedItemsFetcher* NewLC( CNSmlDSHostSession* aSession, |
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TNSmlDSDataStoreElement* aDSItem, |
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const RMessage2& aMessage, |
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RequestFinishedFunction aReqFinishedFunc ); |
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/** |
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* C++ destructor |
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*/ |
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virtual ~CNSmlDSChangedItemsFetcher(); |
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public: //New methods |
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/** |
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* Fetches all changed items asynchronously. Calls the call back method when done. |
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*/ |
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void FetchAllChangedItemsL(); |
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/** |
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* Returns the changes after they are fetched. |
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* @return RNSmlDbItemModificationSet*. Contains the requested changes. |
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*/ |
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const RNSmlDbItemModificationSet* ChangedItems() const; |
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protected: |
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/** |
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* A C++ constructor of this class. |
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* @param aSession. The session object of the request. |
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* @param aDSItem. Contains the data store, which provides the asynchronous service. |
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* @param aMessage. The message associated with the request. |
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* @param aReqFinishedFunc. The call back function this object calls, when request completes. |
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*/ |
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CNSmlDSChangedItemsFetcher( CNSmlDSHostSession* aSession, |
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TNSmlDSDataStoreElement* aDSItem, |
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const RMessage2& aMessage, |
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RequestFinishedFunction aReqFinishedFunc ); |
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/** |
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* Symbian 2nd phase constructor |
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*/ |
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void ConstructL(); |
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private: // Functions from base classes |
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virtual void DoCancel(); |
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virtual void RunL(); |
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TInt RunError ( TInt aError ); |
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public: |
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protected: |
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RequestFinishedFunction iReqFinishedFunc; |
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TNSmlDbItemModification::TNSmlDbItemModificationType iNextModsToFetch; |
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RNSmlDbItemModificationSet* iChangedItems; |
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}; |
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#endif //__NSMLDSASYNCREQUESTHANDLER_H__ |
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// End of File |