// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).

 // All rights reserved.

 // This component and the accompanying materials are made available

 // under the terms of "Eclipse Public License v1.0"

 // which accompanies this distribution, and is available

 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

 //

 // Initial Contributors:

 // Nokia Corporation - initial contribution.

 //

 // Contributors:

 //

 // Description:

 //

 #ifndef __ROMONLYRESOLVER_H__

 #define __ROMONLYRESOLVER_H__

 #include "DefaultResolver.h"

 #include "RegistryData.h"

 class TEComResolverParams;

 /**

 	@internalComponent

 	@since 7.0

 	Special resolver which controls the identification, (resolution), of which implementation 

 	will be used to satisfy an interface implementation instantiation. This version only allows

 	plug-ins which are installed in ROM or are updates of ones originally found in ROM.

  */

 class CRomOnlyResolver : public CDefaultResolver

 {

 public:

 /**

 	@fn				NewL(CRegistryData& aRegistry)

 	Intended Usage	: Standardized safe construction which leaves nothing 

 					on the cleanup stack.	

 	Error Condition	: Cannot fully construct because of memory limitations.	

 	@leave			KErrNoMemory

 	@since			7.0

 	@return			A pointer to the new class

 	@post			CRomOnlyResolver is fully constructed, 

 					and initialized.

  */

 	static CRomOnlyResolver* NewL(MPublicRegistry& aRegistry);

 /**

 	@fn				~CRomOnlyResolver()

 	Intended Usage	: Standard default d'tor	

 	Error Condition	: None	

 	@since			7.0

  */

 	~CRomOnlyResolver();

 /**

 	@fn				IdentifyImplementationL(TUid aInterfaceUid, 

 											const TEComResolverParams& aAdditionalParameters) const

 	Intended Usage	:	Request that the resolver identify the most appropriate 

 						interface implementation.

 	Error Condition	:	

 	@since			7.0

 	@param			aInterfaceUid The interface for which implementations are requested

 	@param			aAdditionalParameters Data to be used to refine the search further

 	@return			The Uid of the best fit interface implementation - KNullUid if no match is found

 	@pre 			Object is fully constructed and initialized

 	@post			Registry contents are not modified but registry keys may be updated

  */

 	TUid IdentifyImplementationL(TUid aInterfaceUid, 

 								 const TEComResolverParams& aAdditionalParameters)const ;

 /**

 	@fn				ListAllL(TUid aInterfaceUid, 

 							 const TEComResolverParams& aAdditionalParameters) const

 	Intended Usage	:	List all the implementations which satisfy the specified interface.

 	Error Condition	:	

 	@since			7.0

 	@param			aInterfaceUid The interface for which implementations are requested

 	@param			aAdditionalParameters Data to be used to refine the search further

 	@return			Pointer to an array of suitable implementations. Ownership of this array

 	is passed to the calling function.

 	@pre 			Object is fully constructed and initialized

 	@post			Registry contents are not modified but registry keys may be updated

  */

 	RImplInfoArray* ListAllL(TUid aInterfaceUid, 

 							 const TEComResolverParams& aAdditionalParameters)const ;

 private:

 /**

 	@internalComponent

 	@fn				CRomOnlyResolver(CRegistryData& aRegistry)

 	Intended Usage	: Standardized default c'tor	

 	Error Condition	: None	

 	@since			7.0

 	@post			CRomOnlyResolver is fully constructed

  */

 	explicit CRomOnlyResolver(MPublicRegistry& aRegistry);

 };

 #endif // __ROMONLYRESOLVER_H__