2 * DemosceneMusic - DataManager.java - Copyright © 2012 David Roden
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package net.pterodactylus.demoscenemusic.data;
20 import java.sql.ResultSet;
21 import java.sql.SQLException;
22 import java.util.ArrayList;
23 import java.util.Collection;
24 import java.util.HashSet;
25 import java.util.List;
27 import net.pterodactylus.util.database.Database;
28 import net.pterodactylus.util.database.DatabaseException;
29 import net.pterodactylus.util.database.Field;
30 import net.pterodactylus.util.database.Join;
31 import net.pterodactylus.util.database.Join.JoinType;
32 import net.pterodactylus.util.database.OrderField;
33 import net.pterodactylus.util.database.OrderField.Order;
34 import net.pterodactylus.util.database.Parameter.StringParameter;
35 import net.pterodactylus.util.database.Query;
36 import net.pterodactylus.util.database.Query.Type;
37 import net.pterodactylus.util.database.ResultProcessor;
38 import net.pterodactylus.util.database.ValueField;
39 import net.pterodactylus.util.database.ValueFieldWhereClause;
44 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
46 public class DataManager {
48 private final Database database;
50 public DataManager(Database database) {
51 this.database = database;
54 public Collection<Artist> getAllArtists() throws DatabaseException {
55 Query query = new Query(Type.SELECT, "ARTISTS");
56 query.addField(new Field("ARTISTS.*"));
57 query.addField(new Field("GROUP_ARTISTS.*"));
58 query.addField(new Field("GROUPS.*"));
59 query.addJoin(new Join(JoinType.INNER, "GROUP_ARTISTS", new Field("ARTISTS.ID"), new Field("GROUP_ARTISTS.ARTIST")));
60 query.addJoin(new Join(JoinType.INNER, "GROUPS", new Field("GROUP_ARTISTS.GROUP_"), new Field("GROUPS.ID")));
61 query.addOrderField(new OrderField(new Field("ARTISTS.ID")));
62 ArtistLoader artistLoader = new ArtistLoader();
63 database.process(query, artistLoader);
64 return artistLoader.all();
67 public Track trackById(String id) throws DatabaseException {
68 Query query = new Query(Type.SELECT, "TRACKS");
69 query.addField(new Field("TRACKS.*"));
70 query.addField(new Field("TRACK_ARTISTS.*"));
71 query.addField(new Field("ARTISTS.*"));
72 query.addField(new Field("TRACK_STYLES.*"));
73 query.addField(new Field("STYLES.*"));
74 query.addJoin(new Join(JoinType.INNER, "TRACK_ARTISTS", new Field("TRACKS.ID"), new Field("TRACK_ARTISTS.TRACK")));
75 query.addJoin(new Join(JoinType.INNER, "ARTISTS", new Field("TRACK_ARTISTS.ARTIST"), new Field("ARTISTS.ID")));
76 query.addJoin(new Join(JoinType.INNER, "TRACK_STYLES", new Field("TRACKS.ID"), new Field("TRACK_STYLES.TRACK")));
77 query.addJoin(new Join(JoinType.INNER, "STYLES", new Field("TRACK_STYLES.STYLE"), new Field("STYLES.ID")));
78 query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACKS.ID", new StringParameter(id))));
79 query.addOrderField(new OrderField(new Field("TRACKS.ID"), Order.ASCENDING));
80 query.addOrderField(new OrderField(new Field("TRACK_ARTISTS.DISPLAY_ORDER"), Order.ASCENDING));
81 TrackLoader trackLoader = new TrackLoader();
82 database.process(query, trackLoader);
83 return trackLoader.get();
86 private class TrackLoader implements ResultProcessor {
88 private final List<Track> loadedTracks = new ArrayList<Track>();
94 public void processResult(ResultSet resultSet) throws SQLException {
95 String trackId = resultSet.getString("TRACKS.ID");
96 if ((track == null) || (!track.id().equals(trackId))) {
97 track = new DefaultTrack(trackId).name(resultSet.getString("TRACKS.NAME")).artists(new ArrayList<Artist>()).styles(new HashSet<Style>());
98 loadedTracks.add(track);
100 Artist artist = new DefaultArtist(resultSet.getString("ARTISTS.ID")).name(resultSet.getString("ARTISTS.NAME"));
101 if (!track.artists().contains(artist)) {
102 track.artists().add(artist);
104 Style style = new DefaultStyle(resultSet.getString("STYLES.ID")).name(resultSet.getString("STYLES.NAME"));
105 track.styles().add(style);
109 return loadedTracks.isEmpty() ? null : loadedTracks.get(0);
114 private class ArtistLoader implements ResultProcessor {
116 private final List<Artist> artists = new ArrayList<Artist>();
117 private Artist artist;
119 public List<Artist> all() {
124 // RESULTPROCESSOR METHODS
130 public void processResult(ResultSet resultSet) throws SQLException {
131 String artistId = resultSet.getString("ARTISTS.ID");
132 if ((artist == null) || (!artist.id().equals(artistId))) {
133 artist = new DefaultArtist(artistId).name(resultSet.getString("ARTISTS.NAME")).groups(new HashSet<Group>());
137 Group group = new DefaultGroup(resultSet.getString("GROUPS.ID")).name(resultSet.getString("GROUPS.NAME")).url(resultSet.getString("GROUPS.URL"));
138 artist.groups().add(group);