- query.addJoin(new Join(JoinType.INNER, "ARTISTS", new Field("TRACK_ARTISTS.ARTIST"), new Field("ARTISTS.ID")));
- query.addJoin(new Join(JoinType.INNER, "TRACK_STYLES", new Field("TRACKS.ID"), new Field("TRACK_STYLES.TRACK")));
- query.addJoin(new Join(JoinType.INNER, "STYLES", new Field("TRACK_STYLES.STYLE"), new Field("STYLES.ID")));
- query.addWhereClause(new ValueFieldWhereClause(new ValueField("ARTISTS.ID", new StringParameter(artistId))));
- query.addOrderField(new OrderField(new Field("TRACKS.ID"), Order.ASCENDING));
- query.addOrderField(new OrderField(new Field("TRACK_ARTISTS.DISPLAY_ORDER"), Order.ASCENDING));
- TrackLoader trackLoader = new TrackLoader();
- database.process(query, trackLoader);
- return trackLoader.all();
+ query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACK_ARTISTS.ARTIST", new StringParameter(artistId))));
+ return database.getMultiple(query, trackCreator);
+ }
+
+ /**
+ * Returns all groups the artist with the given ID belongs to.
+ *
+ * @param artistId
+ * The ID of the artist
+ * @return All groups the artist belongs to
+ * @throws DatabaseException
+ * if a database error occurs
+ */
+ public Collection<Group> getGroupsByArtist(String artistId) throws DatabaseException {
+ Query query = new Query(Type.SELECT, "GROUPS");
+ query.addField(new Field("GROUPS.*"));
+ query.addJoin(new Join(JoinType.INNER, "GROUP_ARTISTS", new Field("GROUPS.ID"), new Field("GROUP_ARTISTS.GROUP_")));
+ query.addWhereClause(new ValueFieldWhereClause(new ValueField("GROUP_ARTISTS.ARTIST", new StringParameter(artistId))));
+ return database.getMultiple(query, groupCreator);
+ }
+
+ /**
+ * Returns all styles for the track with the given ID.
+ *
+ * @param trackId
+ * The ID of the track
+ * @return All styles for the given track
+ * @throws DatabaseException
+ * if a database error occurs
+ */
+ public Collection<Style> getStylesByTrack(String trackId) throws DatabaseException {
+ Query query = new Query(Type.SELECT, "STYLES");
+ query.addField(new Field("STYLES.*"));
+ query.addJoin(new Join(JoinType.INNER, "TRACK_STYLES", new Field("STYLES.ID"), new Field("TRACK_STYLES.STYLE")));
+ query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACK_STYLES.TRACK", new StringParameter(trackId))));
+ return database.getMultiple(query, styleCreator);
+ }
+
+ /**
+ * Returns the user connected with the given OpenID.
+ *
+ * @param openId
+ * The OpenID to find the user for
+ * @return The user connected with the given OpenID, or {@code null} if
+ * there is no such user
+ * @throws DatabaseException
+ * if a database error occurs
+ */
+ public User getUserByOpenId(String openId) throws DatabaseException {
+ Query query = new Query(Type.SELECT, "USERS");
+ query.addField(new Field("USERS.*"));
+ query.addJoin(new Join(JoinType.INNER, "USER_OPENIDS", new Field("USER_OPENIDS.USER"), new Field("USERS.ID")));
+ query.addWhereClause(new ValueFieldWhereClause(new ValueField("USER_OPENIDS.OPENID", new StringParameter(openId))));
+ return database.getSingle(query, userCreator);
+ }
+
+ /**
+ * Returns all OpenIDs connected with the user with the given ID.
+ *
+ * @param userId
+ * The ID of the user
+ * @return All OpenIDs connected with the given user
+ * @throws DatabaseException
+ * if a database error occurs
+ */
+ public Collection<String> getOpenIdsByUser(String userId) throws DatabaseException {
+ Query query = new Query(Type.SELECT, "USER_OPENIDS");
+ query.addField(new Field("USER_OPENIDS.*"));
+ query.addWhereClause(new ValueFieldWhereClause(new ValueField("USER_OPENIDS.USER", new StringParameter(userId))));
+ return database.getMultiple(query, new StringCreator("USER_OPENIDS.OPENID"));