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/*
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* Copyright (c) 2007 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: Inline methods for codec to pack and unpack data objects.
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*
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*/
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#include <e32base.h>
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#include <ximpapidataobjbase.h>
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#include "searchtypehelpers.h"
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#include "searchobjectfactory.h"
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#include "searchinfoimp.h"
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//DATA TYPES
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// ============================ MEMBER FUNCTIONS =============================
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/**
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* Type definition for exact API data object constructor signature.
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*/
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typedef CXIMPApiDataObjBase* (*TApiDataObjConstructor)( RReadStream& );
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/**
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* Structure for mapping data object interface IDs to
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* to corect API data object constructors.
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*/
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struct SApiDataObjConstructorMap
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{
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//Interface id
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TInt32 iInterfaceId;
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//Function pointer to data object interface implementation
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TApiDataObjConstructor iConstructorPtr;
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} ;
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/**
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* Helper macro to initialise KApiDataObjConstructorTable members.
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*
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* Macro forces that each data object implementation class to have static
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* NewFromStreamLC() member function to instantiate the object.
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*
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* See TApiDataObjConstructor type definition for exact constructor
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* signature.
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*/
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#define CONSTRUCTOR_ENTRY( TheImplementedIf, TheClass ) \
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{ TheImplementedIf::KInterfaceId, TheClass::NewFromStreamLC } \
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/**
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* Constructor function mapping for data object interface implementations.
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*
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* When new data object types are implemented, add them here.
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*/
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const SApiDataObjConstructorMap KApiDataObjConstructorTable[] =
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{
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CONSTRUCTOR_ENTRY( MSearchInfo, CSearchInfoImp ),
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};
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/**
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* Count of constructor mappings.
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*/
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const TInt KApiDataObjConstructorCount = sizeof( KApiDataObjConstructorTable )
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/ sizeof( SApiDataObjConstructorMap );
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// ============================ HELPER FUNCTIONS =============================
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namespace {
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/**
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* Helper function to locate constructor function for
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* data object interface ID.
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*
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* @param aDataObjInterfaceId The data object interface ID.
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* @return Data object constructor function.
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*/
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TApiDataObjConstructor ConstructorForInterface( TInt32 aDataObjInterfaceId )
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{
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//Locate correct constructor
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for( TInt ix = 0; ix < KApiDataObjConstructorCount; ix++ )
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{
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const SApiDataObjConstructorMap map = KApiDataObjConstructorTable[ ix ];
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if( map.iInterfaceId == aDataObjInterfaceId )
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{
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return map.iConstructorPtr;
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}
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}
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//If assertion below fails, check that data object implementation
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//class implementing requested data object interface (aDataObjInterfaceId)
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//is registered to KApiDataObjConstructorTable
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__ASSERT_DEBUG( EFalse,
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User::Panic( _L("ImObjectFactory"), KErrUnknown ) );
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return NULL;
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}
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/**
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* Helper function to instantiate new data object object
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* of requested type and construct it from the stream.
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*
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* @param aDataObjInterfaceId
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* @return Data object constructor function.
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*/
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CXIMPApiDataObjBase* NewDataObjectFromStreamLC( TInt32 aDataObjInterfaceId,
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RReadStream& aStream )
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{
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TApiDataObjConstructor newFromStreamLC = NULL;
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//Locate correct constructor for interface ID
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newFromStreamLC = ConstructorForInterface( aDataObjInterfaceId );
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//Instantiate the object
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CXIMPApiDataObjBase* dataObject = newFromStreamLC( aStream );
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return dataObject;
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}
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} // namespace
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// ---------------------------------------------------------------------------
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// SearchApiDataObjFactory::InternalizeL
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// ---------------------------------------------------------------------------
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//
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template< class INFOIMP >
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inline void CSearchApiDataObjFactory::InternalizeL(
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RReadStream& aStream,
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RPointerArray<INFOIMP>& aArray )
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{
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TInt32 arrLen = aStream.ReadInt32L();
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for ( TInt i = 0; i < arrLen; i++ )
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{
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TInt paramType = aStream.ReadInt32L();
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INFOIMP* infoObj = ( INFOIMP* ) NewDataObjectFromStreamLC( paramType, aStream );
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aArray.AppendL( infoObj );
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CleanupStack::Pop( infoObj );
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}
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}
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// ---------------------------------------------------------------------------
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// SearchApiDataObjFactory::ExternalizeL
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// ---------------------------------------------------------------------------
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//
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template <class INFOIMP>
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inline void CSearchApiDataObjFactory::ExternalizeL(
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RWriteStream& aWs,
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const RPointerArray<INFOIMP>& aArray )
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{
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aWs.WriteInt32L( aArray.Count() ); // array length
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for ( TInt i = 0; i < aArray.Count(); i++ )
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{
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INFOIMP* infoField = aArray[ i ];
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// write the type
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aWs.WriteInt32L( infoField->Base().GetInterfaceId() );
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// write the actual object
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infoField->ExternalizeL( aWs );
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}
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aWs.CommitL();
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}
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