author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 27 May 2010 14:26:55 +0300 | |
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/* |
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* Copyright (c) 2009 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: Interface defenition for HTI services |
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* |
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*/ |
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#ifndef SERVICEPLUGININTERFACE_H__ |
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#define SERVICEPLUGININTERFACE_H__ |
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#include <ecom/ecom.h> |
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#include <HtiDispatcherInterface.h> |
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const TUid KHTIServiceInterfaceUid = {0x1020DEB7}; |
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class CHTIServicePluginInterface : public CBase, public MHtiMemoryObserver |
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{ |
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public: //ECom specific methods (implemented as inline) |
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/** |
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* Wraps ECom object instantitation |
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* plug-in loaded by its UID |
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* |
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* @param aUID service plugin implementation UDI |
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*/ |
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static CHTIServicePluginInterface* NewL(const TUid aUID); |
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/** |
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* Wraps ECom object instantitation |
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* default resovler is used |
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* |
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* @param aMatchString service plugin name |
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*/ |
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static CHTIServicePluginInterface* NewL(const TDesC8& aMatchString); |
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/** |
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* Wraps ECom object destruction |
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*/ |
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virtual ~CHTIServicePluginInterface(); |
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public: //Comm plugin interface methods |
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/** |
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* This method is called by framework after the plugin was loaded and |
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* iDispatcher set. |
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*/ |
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virtual void InitL(){}; |
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/** |
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* Result indicates eiterh plug-in is able to process request |
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* (e.g. a plug-in doesn't have an outstanding request to async service). |
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* Framework calls this method before calling ProcessMessageL(). |
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* If plug-in is busy, request will be dispatched later. |
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* Typically, AO's CActive::IsActive() can be used |
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* in a overriden implementation. |
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* Default implementation returns EFalse. |
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*/ |
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virtual TBool IsBusy(); |
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/** |
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* Interface service |
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* implementation of service, should return ASAP. |
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* aMessage contan is service specific. |
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* |
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* @param aMessage message body destinated to a servive |
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* @param aPriority message priority |
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*/ |
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virtual void ProcessMessageL(const TDesC8& aMessage, |
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THtiMessagePriority aPriority) = 0; |
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virtual void Error(TInt /*aErrorCode*/, const TDesC8& /*aErrorDescription*/){}; |
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/** |
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* Set dispatcher that used by services to send messages. |
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* |
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*/ |
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virtual void SetDispatcher(MHtiDispatcher* aDispatcher); |
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public: //from MHtiMemoryObserver |
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/** |
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* Empty implementation. |
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*/ |
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virtual void NotifyMemoryChange(TInt /*aAvailableMemory*/){}; |
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protected: |
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/** |
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* Pointer to a dispatcher. It is not availble during construction. |
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* If it should be used before starting process messages, InitL() |
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* must be overriden. |
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*/ |
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MHtiDispatcher* iDispatcher; |
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private: |
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/** |
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* Instance identifier key |
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*/ |
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TUid iDtor_ID_Key; |
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}; |
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#include <HtiServicePluginInterface.inl> |
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#endif |