import java.sql.ResultSet;
import java.sql.SQLException;
-import java.util.ArrayList;
import java.util.Collection;
-import java.util.HashSet;
import java.util.List;
import java.util.concurrent.Callable;
import net.pterodactylus.util.database.Join.JoinType;
import net.pterodactylus.util.database.ObjectCreator;
import net.pterodactylus.util.database.OrderField;
-import net.pterodactylus.util.database.OrderField.Order;
import net.pterodactylus.util.database.Parameter.StringParameter;
import net.pterodactylus.util.database.Query;
import net.pterodactylus.util.database.Query.Type;
-import net.pterodactylus.util.database.ResultProcessor;
import net.pterodactylus.util.database.ValueField;
import net.pterodactylus.util.database.ValueFieldWhereClause;
private final ObjectCreator<Artist> artistCreator = new ArtistCreator();
private final ObjectCreator<Group> groupCreator = new GroupCreator();
private final ObjectCreator<Track> trackCreator = new TrackCreator();
+ private final ObjectCreator<Style> styleCreator = new StyleCreator();
private final Database database;
return database.getMultiple(query, artistCreator);
}
- public Track trackById(String id) throws DatabaseException {
+ public List<Artist> getArtistsByTrack(String trackId) throws DatabaseException {
+ Query query = new Query(Type.SELECT, "ARTISTS");
+ query.addField(new Field("ARTISTS.*"));
+ query.addJoin(new Join(JoinType.INNER, "TRACK_ARTISTS", new Field("TRACK_ARTISTS.ARTIST"), new Field("ARTISTS.ID")));
+ query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACK_ARTISTS.TRACK", new StringParameter(trackId))));
+ query.addOrderField(new OrderField(new Field("TRACK_ARTISTS.DISPLAY_ORDER")));
+ return database.getMultiple(query, artistCreator);
+ }
+
+ public Track getTrackById(String id) throws DatabaseException {
Query query = new Query(Type.SELECT, "TRACKS");
query.addField(new Field("TRACKS.*"));
query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACKS.ID", new StringParameter(id))));
return database.getMultiple(query, groupCreator);
}
- private class TrackLoader implements ResultProcessor {
-
- private final List<Track> loadedTracks = new ArrayList<Track>();
- private Track track;
-
- public Track get() {
- return loadedTracks.isEmpty() ? null : loadedTracks.get(0);
- }
-
- public List<Track> all() {
- return loadedTracks;
- }
-
- /**
- * {@inheritDoc}
- */
- public void processResult(ResultSet resultSet) throws SQLException {
- String trackId = resultSet.getString("TRACKS.ID");
- if ((track == null) || (!track.id().equals(trackId))) {
- track = new DefaultTrack(trackId).name(resultSet.getString("TRACKS.NAME")).artists(new ArrayList<Artist>()).styles(new HashSet<Style>());
- loadedTracks.add(track);
- }
- Artist artist = new LazyArtist(resultSet.getString("ARTISTS.ID")).name(resultSet.getString("ARTISTS.NAME"));
- if (!track.artists().contains(artist)) {
- track.artists().add(artist);
- }
- Style style = new DefaultStyle(resultSet.getString("STYLES.ID")).name(resultSet.getString("STYLES.NAME"));
- track.styles().add(style);
- }
-
- }
-
- private class ArtistLoader implements ResultProcessor {
-
- private final List<Artist> artists = new ArrayList<Artist>();
- private Artist artist;
-
- public Artist get() {
- return artists.isEmpty() ? null : artists.get(0);
- }
-
- public List<Artist> all() {
- return artists;
- }
-
- //
- // RESULTPROCESSOR METHODS
- //
-
- /**
- * {@inheritDoc}
- */
- public void processResult(ResultSet resultSet) throws SQLException {
- String artistId = resultSet.getString("ARTISTS.ID");
- if ((artist == null) || (!artist.id().equals(artistId))) {
- artist = new LazyArtist(artistId).name(resultSet.getString("ARTISTS.NAME")).groups(new HashSet<Group>());
- artists.add(artist);
- }
-
- Group group = new DefaultGroup(resultSet.getString("GROUPS.ID")).name(resultSet.getString("GROUPS.NAME")).url(resultSet.getString("GROUPS.URL"));
- artist.groups().add(group);
- }
-
+ 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);
}
private class LazyArtist extends DefaultArtist {
});
+ private final Memoizer<Void> stylesMemoizer = new Memoizer<Void>(new Callable<Void>() {
+
+ @Override
+ public Void call() throws Exception {
+ if (!hasValue("styles")) {
+ value("styles", Collection.class).set(getStylesByTrack(id()));
+ }
+ return null;
+ }
+
+ });
+
/**
* @param id
*/
*/
@Override
public Collection<Style> styles() {
- // TODO Auto-generated method stub
+ stylesMemoizer.get();
return super.styles();
}
}
+ private class StyleCreator implements ObjectCreator<Style> {
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public Style createObject(ResultSet resultSet) throws SQLException {
+ return new DefaultStyle(resultSet.getString("STYLES.ID")).name(resultSet.getString("STYLES.NAME"));
+ }
+
+ }
+
}