def get_all_raw_data_paths(self):
    """Get paths to all raw data."""
    # Get the filenames depending on the dataset size.
    if self.dataset_size == 'small':
      train_file = os.path.join(
          self.code2seq_extracted_dir, 'java-small.train.c2s')
      validation_file = os.path.join(
          self.code2seq_extracted_dir, 'java-small.val.c2s')
      test_file = os.path.join(
          self.code2seq_extracted_dir, 'java-small.test.c2s')
    elif self.dataset_size == 'med':
      train_file = os.path.join(
          self.code2seq_extracted_dir, 'java-med.train.c2s')
      validation_file = os.path.join(
          self.code2seq_extracted_dir, 'java-med.val.c2s')
      test_file = os.path.join(
          self.code2seq_extracted_dir, 'java-med.test.c2s')
    else:
      train_file = os.path.join(
          self.code2seq_extracted_dir, 'java-large.train.c2s')
      validation_file = os.path.join(
          self.code2seq_extracted_dir, 'java-large.val.c2s')
      test_file = os.path.join(
          self.code2seq_extracted_dir, 'java-large.test.c2s')
    return [train_file, validation_file, test_file]