Examples of org.jaudiotagger.tag.Tag

org.jaudiotagger.tag.Tag
This interface represents the basic data structure for the default audio library functionality.

Some audio file tagging systems allow to specify multiple values for one type of information. The artist for example. Some songs may be a cooperation of two or more artists. Sometimes a tagging user wants to specify them in the tag without making one long text string.

The addField() method can be used for this but it is possible the underlying implementation does not support that kind of storing multiple values and will just overwrite the existing value

Code Examples:
```
  AudioFile file = AudioFileIO.read(new File("C:\\test.mp3")); Tag tag = file.getTag();  
```
@author Raphael Slinckx @author Paul Taylor

                writer.write(b);
            }
            writer.close();
            AudioFileIO.logger.getParent().setLevel(Level.OFF);
            AudioFile f = AudioFileIO.read(tmpFile);
            Tag tag = f.getTag();


            me = new Mp3Metadata();


            me.author = tag.getFirstArtist();
            me.album = tag.getFirstAlbum();
            me.title = tag.getFirstTitle();
            me.comment = tag.getFirstComment();
            me.year = tag.getFirstYear();


        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (tmpFile != null) {

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public class MP4TagWriter extends AudioTagWriter {
    @Override
    public void write(Track track) throws TagWriteException {
        try {
            org.jaudiotagger.audio.AudioFile af1 = AudioFileIO.read(track.getTrackData().getFile());
            Tag abstractTag = af1.getTag();
            copyTagFields(abstractTag, new Mp4Tag(), track);
      // workaround since track/tracktotal and disc/disctotal share same field
            handleTrackDiscFields(abstractTag, track);
      // workaround since genre and genre custom field types used
            handleGenreFields(abstractTag, track);

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                    }
                }
            } else*/ {
                FlacFileReader reader = new FlacFileReader();
                AudioFile af1 = reader.read(trackData.getFile());
                Tag tag = af1.getTag();
                copyCommonTagFields(tag, track);
                copySpecificTagFields(tag, track);
                GenericAudioHeader audioHeader = (GenericAudioHeader) af1.getAudioHeader();
                copyHeaderFields(audioHeader, track);
            }

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    public Track readSingle(Track track) {
      TrackData trackData = track.getTrackData();
        try {
            OggFileReader reader = new OggFileReader();
            AudioFile af1 = reader.read(trackData.getFile());
            Tag tag = af1.getTag();
            copyCommonTagFields(tag, track);
            copySpecificTagFields(tag, track);
            copyHeaderFields((GenericAudioHeader) af1.getAudioHeader(), track);
        } catch (Exception e) {
            System.out.println("Couldn't read file: " + trackData.getFile());

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public class VorbisTagWriter extends AudioTagWriter {
    @Override
    public void write(Track track) throws TagWriteException {
        try {
            org.jaudiotagger.audio.AudioFile af1 = AudioFileIO.read(track.getTrackData().getFile());
            Tag abstractTag = af1.getTagOrCreateDefault();
            copyTagFields(abstractTag, new VorbisCommentTag(), track);
            AudioFileIO.write(af1);
        } catch (Exception e) {
            throw new TagWriteException(e);
        }

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            raf = new RandomAccessFile(f, "r");
            raf.seek(0);


            GenericAudioHeader info = getEncodingInfo(raf);
            raf.seek(0);
            Tag tag = getTag(raf);
            return new AudioFile(f, info, tag);


        } catch (CannotReadException cre) {
            throw cre;
        } catch (Exception e) {

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     * Get the tag or if the file doesn't have one at all, create a default tag  and return
     *
     * @return
     */
    public Tag getTagOrCreateDefault() {
        Tag tag = getTag();
        if (tag == null) {
            return createDefaultTag();
        }
        return tag;
    }

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     * Get the tag or if the file doesn't have one at all, create a default tag  and set it
     *
     * @return
     */
    public Tag getTagOrCreateAndSetDefault() {
        Tag tag = getTag();
        if (tag == null) {
            tag = createDefaultTag();
            setTag(tag);
            return tag;
        }

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  public static void writeTags(Track t) throws CannotReadException, IOException, TagException, ReadOnlyFileException, InvalidAudioFrameException, CannotWriteException{
    
    File f = new File(t.getPath().toString());
    AudioFile af = AudioFileIO.read(f);
    
    Tag tag = af.getTag();
    tag.setField(FieldKey.ARTIST,t.getArtistName());
    tag.setField(FieldKey.ALBUM,t.getAlbumName());
    tag.setField(FieldKey.TITLE,t.getTitle());
    tag.setField(FieldKey.GENRE,t.getGenre());
    try {
      Integer.parseInt(t.getTrack());
      tag.setField(FieldKey.TRACK,t.getTrack());
    } catch (NumberFormatException e) {}
    tag.setField(FieldKey.ARTIST,t.getArtistName());
    af.commit();
  }

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  public static Track readTags(Track t) throws CannotReadException, IOException, TagException, ReadOnlyFileException, InvalidAudioFrameException{
    Track track = null;
    File f = new File(t.getPath().toString());
    AudioFile af = AudioFileIO.read(f);
    
    Tag tag = af.getTag();
    String artist = tag.getFirst(FieldKey.ARTIST);
    String album = tag.getFirst(FieldKey.ALBUM);
    String title = tag.getFirst(FieldKey.TITLE);
    String nr = tag.getFirst(FieldKey.TRACK);
    String genre = tag.getFirst(FieldKey.GENRE);
    track = new TrackDto(nr, artist, album, title, genre, 0, t.getPath());
    return track;
  }

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