author | William Roberts <williamr@symbian.org> |
Tue, 16 Mar 2010 16:12:26 +0000 | |
branch | Symbian2 |
changeset 2 | 2fe1408b6811 |
parent 0 | 061f57f2323e |
child 4 | 837f303aceeb |
permissions | -rw-r--r-- |
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// Copyright (c) 1997-2009 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 the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.symbianfoundation.org/legal/licencesv10.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: |
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// This file contains the definition of the CResolver |
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// class. |
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// |
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// |
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#if defined (_MSC_VER) && (_MSC_VER >= 1000) |
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#pragma once |
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#endif |
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#ifndef __RESOLVER_H__ |
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#define __RESOLVER_H__ |
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#include <e32base.h> |
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#include <f32file.h> |
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#include <ecom/ecom.h> |
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#include <ecom/publicregistry.h> |
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class TEComResolverParams; |
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/** |
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The UID idnetifying the ECOM Resolver plugin interface. |
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@publishedAll |
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@released |
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*/ |
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const TUid KCustomResolverInterfaceUid = {0x10009D90}; |
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/** |
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Abstract base class which is used to identify the correct interface implementation |
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based on criteria supplied by the client. |
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This base class can be used to write a client specific resolver, however this is not |
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required as a default implementation is provided within ECom. |
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@publishedAll |
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@released |
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*/ |
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class CResolver : public CBase |
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{ |
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public: |
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/** |
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Intended Usage : Request that the resolver identify the most appropriate interface |
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implementation. |
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Error Condition : Depends on implementation. |
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@since 7.0 |
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@param aInterfaceUid The interface for which an implementation is requested |
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@param aAdditionalParameters The parameters which must match for an |
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implementation to be suitable |
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@return The unique Id of the implementation which satisfies the specified parameters. |
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@pre This object is fully constructed. |
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*/ |
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virtual TUid IdentifyImplementationL(TUid aInterfaceUid, |
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const TEComResolverParams& aAdditionalParameters) const = 0; |
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/** |
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Intended Usage : List all the implementations which satisfy the specified |
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interface definition and the resolve parameters supplied. |
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Error Condition : Depends on implementation. |
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@since 7.0 |
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@param aInterfaceUid The interface for which implementations are requested |
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@param aAdditionalParameters The parameters which must match for an |
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implementation to be suitable |
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@return Pointer to an array of suitable implementations. Ownership of this |
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array is passed to the calling function. |
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@pre Object is fully constructed and initialized |
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@post Registry contents are not modified but registry keys may be updated |
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*/ |
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virtual RImplInfoArray* ListAllL(TUid aInterfaceUid, |
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const TEComResolverParams& aAdditionalParameters) const = 0; |
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inline RImplInfoArray& ListAllL(TUid aInterfaceUid)const; |
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protected: |
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explicit inline CResolver(MPublicRegistry& aRegistry); |
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// Attributes |
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/** A reference to the instantiated registry information */ |
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const MPublicRegistry& iRegistry; |
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}; |
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/** |
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@internalAll |
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Intended Usage : Standardized default c'tor |
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Error Condition : None |
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@since 7.0 |
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@post CResolver is fully constructed |
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*/ |
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CResolver::CResolver(MPublicRegistry& aRegistry) : |
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CBase(), |
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iRegistry(aRegistry) |
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{ |
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// Do nothing |
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} |
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/** |
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Intended Usage : List all the implementations which satisfy the specified interface. |
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Error Condition : @see CRegistryData::ListImplementationsL |
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@since 7.0 |
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@param aInterfaceUid The interface for which implementations are requested |
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@return Array of suitable implementations |
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@pre Object is fully constructed and initialized |
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@post Registry contents are not modified but registry keys may be updated |
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*/ |
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RImplInfoArray& CResolver::ListAllL(TUid aInterfaceUid)const |
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{ |
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return iRegistry.ListImplementationsL(aInterfaceUid); |
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} |
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#endif /* __RESOLVER_H__ */ |