contentpublishingsrv/contentpublishingserver/cpserver/inc/cpactiondatacache.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 31 Mar 2010 22:04:35 +0300
branchRCL_3
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/*
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* Copyright (c) 2008 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:  Class used by session to handle asynchronous requests
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 *
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*/
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#ifndef C_CPACTIONDATACACHE_H
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#define C_CPACTIONDATACACHE_H
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#include <e32base.h>
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#include <e32hashtab.h> 
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class CLiwDefaultList;
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/**
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 *  Action Data Cache holds a list containing data needed to 
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 *  lauch an action fetched from SQL database
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 *  @since S60 v5.0
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 */
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class CCPActionDataCache:public CBase
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    {
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public:
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    /**
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     * Creates new instance of CCPActionDataCache.
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     * 
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     * @return new instance of CCPActionDataCache
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     */
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    static CCPActionDataCache* NewL( );
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    /**
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     * Creates new instance of CCPActionDataCache.
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     * 
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     * @return new instance of CCPActionDataCache
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     */
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    static CCPActionDataCache* NewLC( );
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    /**
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     * Destructor.
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     */
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    virtual ~CCPActionDataCache();
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    /**
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     * Removes an item from the cache
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     * 
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     * @param aMap a map containing item identifiers 
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     */
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    void HandleCacheRemoveL( const CLiwMap* aMap );
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    /**
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     * Appends an item to the cache
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     * 
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     * @param aParamList a list to be added to the cache
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     */
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    void AppendL( const CLiwGenericParamList* aParamList); 
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    /**
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     * Checks if it is possible to cache the item. 
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     * Only items that are specified, which means that id or 
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     * all parameters ( publisher, content_type, content_id ) are provided
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     * 
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     * @param aMap a map containing item identifiers 
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     * @return ETrue if it is possible to cache an item, EFalse if not
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     */
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    TBool IsCacheableL( const CLiwMap* aMap );
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    /**
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     * Checks if it item exists in the cache.
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     * 
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     * @param aMap a map containing item identifiers 
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     * @return ETrue if the item exists in the cache, EFalse if not
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     */
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    TBool ExistL( const CLiwMap* aMap );
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    /**
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     * Gets an item from the cache
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     * 
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     * @param aMap a map containing item identifiers 
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     * @return aParamList item returned from the cache
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     */
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    void GetL( const CLiwMap* aMap,
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            CLiwGenericParamList* aParamList );
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private:
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    /*
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     * Constructor
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     */
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    CCPActionDataCache();
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    /**
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     * 2nd phase constructor.
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     */
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    void ConstructL( );
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    /**
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     * Checks if two items match
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     * 
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     * @param aCachedMap a map from the cache containing item identifiers 
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     * @param aInputMap an input map containing item identifiers 
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     * @return ETrue if items match , EFalse if not
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     */
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    TBool MatchL(const CLiwMap* aCachedMap, const CLiwMap* aInputMap);
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    /**
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     * Checks if two strings contained in both maps match
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     * 
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     * @param aLeft first map
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     * @param aRight second map 
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     * @param aKey key 
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     * @return ETrue if items match , EFalse if not
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     */
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    TBool MatchL(const CLiwMap* aLeft, 
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            const CLiwMap* aRight, const TDesC8& aKey );
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    /**
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     * Checks if a string contained in map is specified
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     * (it has value different than "all")
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     * 
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     * @param aMap map
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     * @param aKey key 
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     * @return ETrue if item is specified , EFalse if not
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     */
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    TBool IsSpecifiedL(const CLiwMap* aMap, 
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            const TDesC8& aKey ); 
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    /**
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     * Finds the item in the cache
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     *  
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     * @param aKey map containing identifiers 
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     * @return id of the item in a cache, KErrNotFound if does not 
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     * exist in the cache
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     */
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    TInt FindL( const CLiwMap* aKey ); 
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    /**
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     * Copies variant from one map to another
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     * 
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     * @param aKey key
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     * @param aInMap input map 
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     * @param aOutMap output map 
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     */
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    void CopyVariantL(const TDesC8& aKey,
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            const CLiwMap* aInMap, CLiwDefaultMap* aOutMap );
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private:
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    /*
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     * Internal list. Own
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     */
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    CLiwDefaultList* iInternalList;
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    };
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#endif // C_CPACTIONDATACACHE_H