author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 07 Jan 2010 13:31:38 +0200 | |
changeset 37 | cb62a4f66ebe |
parent 36 | 0ed94ceaa377 |
child 65 | 5bfc169077b2 |
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 the License "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: A task to update a Feed. |
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* |
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*/ |
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#ifndef UPDATE_FEED_TASK_H |
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#define UPDATE_FEED_TASK_H |
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// INCLUDES |
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#include <e32base.h> |
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#include "FeedParserObserver.h" |
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#include <leaktracker.h> |
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#include "LoadObserver.h" |
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#include "Task.h" |
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// CONSTANTS |
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// MACROS |
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// DATA TYPES |
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// FUNCTION PROTOTYPES |
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// FORWARD DECLARATIONS |
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class CIdle; |
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class CFeedHandler; |
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class CHttpConnection; |
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class CPackedFeed; |
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class CUrlHandler; |
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// CLASS DECLARATION |
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/** |
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* The UpdateFeedTask's observer. |
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* |
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* \b Library: FeedsEngine.lib |
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* |
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* @since 3.0 |
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*/ |
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class MUpdateFeedTaskObserver |
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{ |
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public: |
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/** |
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* Notifies the observer that the task is about to start a lengthy |
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* operation. In response the observer could display somekind of |
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* status indicator. |
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* |
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* @since 3.0 |
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* @return void. |
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*/ |
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virtual void StartWait() = 0; |
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/** |
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* Called upon completion of the task. |
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* |
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* @since 3.0 |
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* @param aPackedFeed The resulting feed. aPackedFeed is adopted by the |
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* implementing class. |
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* @param aFeedUrl The feed's url. |
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* @param aStatusCode The completion status of the request. |
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* @return Void |
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*/ |
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virtual void Completed(CPackedFeed* aPackedFeed, const TDesC& aFeedUrl,TInt aFeedId, TInt aStatusCode) = 0; |
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/** |
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* Called upon start of the task. |
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* |
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* @since 3.1 |
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* @param . |
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* @return connection |
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*/ |
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virtual CHttpConnection& HttpConnection() = 0; |
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}; |
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/** |
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* A task to update a Feed. |
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* |
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* \b Library: FeedsEngine.lib |
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* |
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* @since 3.0 |
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*/ |
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class CUpdateFeedTask: public CTask, public MLoadObserver, public MFeedParserObserver |
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{ |
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public: // Constructors and destructor |
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/** |
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* Two-phased constructor. |
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*/ |
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static CUpdateFeedTask* NewL(CFeedsServer& aFeedsServer, |
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const TDesC& aUrl,TInt aFeedId, MUpdateFeedTaskObserver& aObserver); |
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/** |
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* Two-phased constructor. |
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*/ |
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static CUpdateFeedTask* NewL(CFeedsServer& aFeedsServer, const TDesC& aUrl,TInt aFeedId, |
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TDesC8* aFeedBuffer, MUpdateFeedTaskObserver& aObserver); |
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/** |
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* Destructor. |
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*/ |
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virtual ~CUpdateFeedTask(); |
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public: // From CTask |
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/** |
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* Starts the task. |
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* |
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* @since 3.0 |
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* @return Void |
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*/ |
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virtual void StartTaskL(); |
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public: // From MLoadObserver |
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/** |
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* Notifies the observer that the UrlHandler is about to start a lengthy |
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* operation. In response the observer could display somekind of |
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* status indicator. |
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* |
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* @since 3.0 |
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* @return void. |
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*/ |
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virtual void StartWait(); |
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/** |
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* Passes the status code and responseBody to the observer. The observer |
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* adopts aResponseBody. |
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* |
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* @since 3.0 |
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* @param aStatusCode The status code - normalized to the http response codes. |
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* @param aResponseBody The response body or NULL. |
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* @param aContentType The content-type. |
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* @param aCharSet The char-encoding. |
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* @return void. |
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*/ |
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virtual void LoadCompleted(TInt aStatusCode, TDesC8* aResponseBody, |
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const TDesC& aContentType, const TDesC& aCharSet); |
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public: // From MFeedParserObserver |
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/** |
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* The beginning of a feed was found. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void FeedBeginsL(); |
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/** |
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* The end of a feed was found. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void FeedEndsL(); |
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/** |
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* The beginning of a item was found. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void ItemBeginsL(); |
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/** |
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* The end of a item was found. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void ItemEndsL(); |
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/** |
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* The beginning of a enclosure was found. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void EnclosureBeginsL(); |
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/** |
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* The end of a enclosure was found. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void EnclosureEndsL(); |
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/** |
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* A attribute was found. This attribute should be applied to |
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* the enclosing entity (Feed, Item, or Enclosure). |
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* |
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* @since 3.1 |
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* @param aAttribute The attribute. |
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* @param aValue The attribute's value. |
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* @return void. |
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*/ |
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virtual void AddAttributeL(TInt aAttribute, const TDesC& aValue); |
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/** |
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* An unimportant element was found. The client can use this |
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* information for feed validation. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void OtherTitleL(); |
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/** |
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* An unimportant element was found. The client can use this |
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* information for feed validation. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void OtherDescriptionL(); |
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/** |
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* An unimportant element was found. The client can use this |
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* information for feed validation. |
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* |
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* @since 3.1 |
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* @return void. |
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*/ |
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virtual void OtherLinkL(); |
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private: |
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/** |
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* C++ default constructor. |
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*/ |
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CUpdateFeedTask(CFeedsServer& aFeedsServer, MUpdateFeedTaskObserver& aObserver); |
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/** |
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* By default Symbian 2nd phase constructor is private. |
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*/ |
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void ConstructL(const TDesC& aUrl,TInt aFeedId); |
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/** |
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* Parses the buffer to the observer now that the callstack has unrolled. |
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* |
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* @since 3.0 |
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* @param aPtr The this pointer. |
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* @return Always returns EFalse. |
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*/ |
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static TInt DelayedParse(TAny* aPtr); |
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private: |
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TLeakTracker iLeakTracker; |
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MUpdateFeedTaskObserver& iObserver; |
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CIdle* iIdle; |
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CUrlHandler* iUrlHandler; |
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TDesC* iUrl; |
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TDesC8* iFileBuffer; |
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CPackedFeed* iPackedFeed; |
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TInt iFeedId; |
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}; |
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#endif // UPDATE_FEED_TASK_H |
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// End of File |