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 Artist getArtistById(String id) throws DatabaseException {
68 Query query = new Query(Type.SELECT, "ARTISTS");
69 query.addField(new Field("ARTISTS.*"));
70 query.addField(new Field("GROUP_ARTISTS.*"));
71 query.addField(new Field("GROUPS.*"));
72 query.addJoin(new Join(JoinType.INNER, "GROUP_ARTISTS", new Field("ARTISTS.ID"), new Field("GROUP_ARTISTS.ARTIST")));
73 query.addJoin(new Join(JoinType.INNER, "GROUPS", new Field("GROUP_ARTISTS.GROUP_"), new Field("GROUPS.ID")));
74 query.addWhereClause(new ValueFieldWhereClause(new ValueField("ARTISTS.ID", new StringParameter(id))));
75 query.addOrderField(new OrderField(new Field("ARTISTS.ID")));
76 ArtistLoader artistLoader = new ArtistLoader();
77 database.process(query, artistLoader);
78 return artistLoader.get();
81 public Track trackById(String id) throws DatabaseException {
82 Query query = new Query(Type.SELECT, "TRACKS");
83 query.addField(new Field("TRACKS.*"));
84 query.addField(new Field("TRACK_ARTISTS.*"));
85 query.addField(new Field("ARTISTS.*"));
86 query.addField(new Field("TRACK_STYLES.*"));
87 query.addField(new Field("STYLES.*"));
88 query.addJoin(new Join(JoinType.INNER, "TRACK_ARTISTS", new Field("TRACKS.ID"), new Field("TRACK_ARTISTS.TRACK")));
89 query.addJoin(new Join(JoinType.INNER, "ARTISTS", new Field("TRACK_ARTISTS.ARTIST"), new Field("ARTISTS.ID")));
90 query.addJoin(new Join(JoinType.INNER, "TRACK_STYLES", new Field("TRACKS.ID"), new Field("TRACK_STYLES.TRACK")));
91 query.addJoin(new Join(JoinType.INNER, "STYLES", new Field("TRACK_STYLES.STYLE"), new Field("STYLES.ID")));
92 query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACKS.ID", new StringParameter(id))));
93 query.addOrderField(new OrderField(new Field("TRACKS.ID"), Order.ASCENDING));
94 query.addOrderField(new OrderField(new Field("TRACK_ARTISTS.DISPLAY_ORDER"), Order.ASCENDING));
95 TrackLoader trackLoader = new TrackLoader();
96 database.process(query, trackLoader);
97 return trackLoader.get();
100 public Collection<Track> getTracksByArtist(String artistId) throws DatabaseException {
101 Query query = new Query(Type.SELECT, "TRACKS");
102 query.addField(new Field("TRACKS.*"));
103 query.addField(new Field("TRACK_ARTISTS.*"));
104 query.addField(new Field("ARTISTS.*"));
105 query.addField(new Field("TRACK_STYLES.*"));
106 query.addField(new Field("STYLES.*"));
107 query.addJoin(new Join(JoinType.INNER, "TRACK_ARTISTS", new Field("TRACKS.ID"), new Field("TRACK_ARTISTS.TRACK")));
108 query.addJoin(new Join(JoinType.INNER, "ARTISTS", new Field("TRACK_ARTISTS.ARTIST"), new Field("ARTISTS.ID")));
109 query.addJoin(new Join(JoinType.INNER, "TRACK_STYLES", new Field("TRACKS.ID"), new Field("TRACK_STYLES.TRACK")));
110 query.addJoin(new Join(JoinType.INNER, "STYLES", new Field("TRACK_STYLES.STYLE"), new Field("STYLES.ID")));
111 query.addWhereClause(new ValueFieldWhereClause(new ValueField("ARTISTS.ID", new StringParameter(artistId))));
112 query.addOrderField(new OrderField(new Field("TRACKS.ID"), Order.ASCENDING));
113 query.addOrderField(new OrderField(new Field("TRACK_ARTISTS.DISPLAY_ORDER"), Order.ASCENDING));
114 TrackLoader trackLoader = new TrackLoader();
115 database.process(query, trackLoader);
116 return trackLoader.all();
119 private class TrackLoader implements ResultProcessor {
121 private final List<Track> loadedTracks = new ArrayList<Track>();
125 return loadedTracks.isEmpty() ? null : loadedTracks.get(0);
128 public List<Track> all() {
135 public void processResult(ResultSet resultSet) throws SQLException {
136 String trackId = resultSet.getString("TRACKS.ID");
137 if ((track == null) || (!track.id().equals(trackId))) {
138 track = new DefaultTrack(trackId).name(resultSet.getString("TRACKS.NAME")).artists(new ArrayList<Artist>()).styles(new HashSet<Style>());
139 loadedTracks.add(track);
141 Artist artist = new DefaultArtist(resultSet.getString("ARTISTS.ID")).name(resultSet.getString("ARTISTS.NAME"));
142 if (!track.artists().contains(artist)) {
143 track.artists().add(artist);
145 Style style = new DefaultStyle(resultSet.getString("STYLES.ID")).name(resultSet.getString("STYLES.NAME"));
146 track.styles().add(style);
151 private class ArtistLoader implements ResultProcessor {
153 private final List<Artist> artists = new ArrayList<Artist>();
154 private Artist artist;
156 public Artist get() {
157 return artists.isEmpty() ? null : artists.get(0);
160 public List<Artist> all() {
165 // RESULTPROCESSOR METHODS
171 public void processResult(ResultSet resultSet) throws SQLException {
172 String artistId = resultSet.getString("ARTISTS.ID");
173 if ((artist == null) || (!artist.id().equals(artistId))) {
174 artist = new DefaultArtist(artistId).name(resultSet.getString("ARTISTS.NAME")).groups(new HashSet<Group>());
178 Group group = new DefaultGroup(resultSet.getString("GROUPS.ID")).name(resultSet.getString("GROUPS.NAME")).url(resultSet.getString("GROUPS.URL"));
179 artist.groups().add(group);