File indexing completed on 2024-05-19 04:49:29

0001 /****************************************************************************************
0002  * Copyright (c) 2008 Nikolaj Hald Nielsen <nhn@kde.org>                                *
0003  *                                                                                      *
0004  * This program is free software; you can redistribute it and/or modify it under        *
0005  * the terms of the GNU General Public License as published by the Free Software        *
0006  * Foundation; either version 2 of the License, or (at your option) any later           *
0007  * version.                                                                             *
0008  *                                                                                      *
0009  * This program is distributed in the hope that it will be useful, but WITHOUT ANY      *
0010  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A      *
0011  * PARTICULAR PURPOSE. See the GNU General Public License for more details.             *
0012  *                                                                                      *
0013  * You should have received a copy of the GNU General Public License along with         *
0014  * this program.  If not, see <http://www.gnu.org/licenses/>.                           *
0015  ****************************************************************************************/
0016  
0017 #ifndef METAPRIVATEMETAREGISTRY_H
0018 #define METAPRIVATEMETAREGISTRY_H
0019 
0020 #include "core/amarokcore_export.h"
0021 #include "core/meta/forward_declarations.h"
0022 
0023 #include <QMap>
0024 
0025 namespace Meta {
0026 
0027 /**
0028  * An extremely simple registry used where tracks often have private album (or other
0029  * members) to correlate these instead of creating a new one for each track (even if they
0030  * are from the same album). This, besides saving memory, also makes it possible to group
0031  * by pointers in the playlist instead of some album/artist name foo.
0032 */
0033 class AMAROKCORE_EXPORT PrivateMetaRegistry
0034 {
0035 public:
0036     static PrivateMetaRegistry *instance();
0037 
0038     void insertAlbum( const QString &owner, const QString &key, const AlbumPtr &album );
0039     void insertArtist( const QString &owner, const QString &key, const ArtistPtr &artist );
0040     void insertGenre( const QString &owner, const QString &key, const GenrePtr &genre );
0041     void insertComposer( const QString &owner, const QString &key, const ComposerPtr &composer );
0042     void insertYear( const QString &owner, const QString &key, const YearPtr &year );
0043 
0044     AlbumPtr album( const QString &owner, const QString &key );
0045     ArtistPtr artist( const QString &owner, const QString &key );
0046     GenrePtr genre( const QString &owner, const QString &key );
0047     ComposerPtr composer( const QString &owner, const QString &key );
0048     YearPtr year( const QString &owner, const QString &key );
0049 
0050 private:
0051     PrivateMetaRegistry();
0052     ~PrivateMetaRegistry();
0053 
0054     static PrivateMetaRegistry *s_instance;      //!< instance variable
0055 
0056     QMap<QString, AlbumPtr> m_albums;
0057     QMap<QString, ArtistPtr> m_artists;
0058     QMap<QString, GenrePtr> m_genre;
0059     QMap<QString, ComposerPtr> m_composers;
0060     QMap<QString, YearPtr> m_years;
0061 };
0062 }
0063 
0064 #endif