How to use

purge

method

in

org.dcm4che3.media.DicomDirWriter

public synchronized int purge() throws IOException {
  int[] count = { 0 };
  purge(findFirstRootDirectoryRecordInUse(false), count);
  return count[0];
}

private int purge() throws IOException {
  checkOut();
  return out.purge();
}

private int purge() throws IOException {
  checkOut();
  return out.purge();
}

  private boolean purge(Attributes rec, int[] count) throws IOException {
    boolean purge = true;
    while (rec != null) {
      if (purge(findLowerDirectoryRecordInUse(rec, false), count)
          && !rec.containsValue(Tag.ReferencedFileID)) {
        deleteRecord(rec);
        count[0]++;
      } else
        purge = false;
      rec = readNextDirectoryRecord(rec);
    }
    return purge;
  }
}