mpserviceplugins/mpxsqlitedbhgplugin/inc/mpxdbartist.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 14 May 2010 15:49:53 +0300
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permissions -rw-r--r--
Revision: 201017 Kit: 201019
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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:  This class is responsible for Artist table.
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*
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*
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*/
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#ifndef MPXDBARTIST_H
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#define MPXDBARTIST_H
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// INCLUDES
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#include "mpxdbcategory.h"
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// CLASS DECLARATION
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class MMPXDbArtistObserver
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    {
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    public:
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		virtual TInt HandleGetAlbumsCountForArtistL(TUint32 aId) = 0;
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	};
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/**
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* Responsible for managing all music databases
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*
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* @lib MPXDbPlugin.lib
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*/
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class CMPXDbArtist :
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    public CMPXDbCategory
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    {
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    public:
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        /**
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        * Two-phased constructor.
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        * @param aDbManager database manager to use for database interactions
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        * @param aCategory identifies the category
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        * @return New CMPXDbArtist instance.
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        */
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        static CMPXDbArtist* NewL(CMPXDbManager& aDbManager,
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            TMPXGeneralCategory aCategory, MMPXDbArtistObserver& aObserver);
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        /**
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        * Two-phased constructor.
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        * @param aDbManager database manager to use for database interactions
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        * @param aCategory identifies the category
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        * @return New CMPXDbArtist instance on the cleanup stack.
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        */
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        static CMPXDbArtist* NewLC(CMPXDbManager& aDbManager,
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            TMPXGeneralCategory aCategory, MMPXDbArtistObserver& aObserver);
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        /**
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        * Destructor
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        */
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        virtual ~CMPXDbArtist();
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    public:
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        /**
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        * Add a category item. If the record already exists, its counter will
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        * be incremented.
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        * @param aName: This is the name to be entered into the row
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        * @param aDriveId: The Drive Id the name (category) belongs
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        * @param aNewRecord: indicates to the caller if a new record is created.
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        *        ETrue if a new row is created in the table; otherwise EFalse.
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        * @param aCaseSensitive indicates whether case sensitivity should be taken
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        *        into consideration when generating the unique row id
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        * @return The unique id of the row added.
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        */
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        TUint32 AddItemL(const TDesC& aName, const TDesC& aArt, TInt aDriveId, TBool& aNewRecord,
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            TBool aCaseSensitive = ETrue);
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        /**
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        * Gets the details for all category items.
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        * @param aAttrs attributes to be returned
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        * @param aMediaArray returns the requested attributes for all items
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        */
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        void GetAllCategoryItemsL(const TArray<TMPXAttribute>& aAttrs,
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            CMPXMediaArray& aMediaArray);
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        /**
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        * Update a category item.
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        * @param aId: The ID of the category to update
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        * @param aMedia: The media data
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        * @param aDriveId: The Drive Id the name (category) belongs
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        * @param aItemChangedMessages: if valid on return contains a updated message if the
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        *        category was updated
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        */
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        void UpdateItemL(TUint32 aId, const CMPXMedia& aMedia, TInt aDriveId, CMPXMessageArray* aItemChangedMessages);
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        /*
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        * Checks if the specified artist item is unknown
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        * @param aId identifies the artist item
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        * @return ETrue if it is unknown, EFalse otherwise
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        */
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        TBool IsUnknownArtistL(TUint32 aId);
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    private:
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        /**
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        * Updates the media with information from the table
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        * @param aRecord record containing the source fields
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        * @param aAttrs attributes to be returned
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        * @param aMedia returns the requested attributes
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        */
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        void UpdateMediaL(RSqlStatement& aRecord, const TArray<TMPXAttribute>& aAttrs,
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            CMPXMedia& aMedia);
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        /**
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        * Generate searching criteria for artist table from the given criteria
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        * @param aMedia media data
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        * @param aFields fields of Artist table
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        * @param aValues values of each field of Artist table
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        * @return a string containing the selection criteria. The ownership is passed to the caller.
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        */
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        void GenerateArtistFieldsValuesL(const CMPXMedia& aMedia,
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            CDesCArray& aFields, CDesCArray& aValues);
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22
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        /**
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        * Gets the Album counts for a Artist item
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        * @param aId identifies the Artist item
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        * @return value of the Album counts
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        */
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        TInt GetAlbumsCountL(TUint32 aId);
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    private:    // from MMPXTable
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        /**
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        * @see MMPXTable
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        */
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        virtual void CreateTableL(RSqlDatabase& aDatabase, TBool aCorruptTable);
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        /**
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        * @see MMPXTable
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        */
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        virtual TBool CheckTableL(RSqlDatabase& aDatabase);
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22
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    private:
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        /**
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        * C++ constructor.
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        * @param aDbManager database manager to use for database interactions
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        * @param aCategory identifies the category
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        */
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        CMPXDbArtist(CMPXDbManager& aDbManager, TMPXGeneralCategory aCategory, MMPXDbArtistObserver& aObserver);
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        /**
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        * Second phase constructor.
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        */
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        void ConstructL();
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    private:
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        /**
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        * Column indexes in the category tables
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        */
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        enum TArtistColumns
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            {
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            EArtistUniqueId = KMPXTableDefaultIndex,
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            EArtistName,
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            EArtistSongCount,
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            EArtistArt,
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            EArtistFieldCount
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            };
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    private:    // Data
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        MMPXDbArtistObserver& iObserver;
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    };
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#endif // MPXDBARTIST_H
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// End of File