MigrateEntityFileUri Allow saving File Entity fields with Drupal 7 Migrate

MigrateEntityFileUri.inc.php

<?php

/**
* Handle cases where we're handed a URI, or local filespec. Extra functionallity: Allow saving file entity fields.
*/
class MigrateEntityFileUri extends MigrateFileUri {
  public function __construct($arguments = array(), $default_file = NULL) {
    parent::__construct($arguments, $default_file);
    if (isset($arguments['fields'])) {
      $this->fields = $arguments['fields'];
    }
  }

  /**
   * Code copied and modified to allow saving a file with field values.
   *
   * Setup a file entity object suitable for saving.
   *
   * @param $destination
   *  Path to the Drupal copy of the file.
   * @param $owner
   *  Uid of the file owner.
   * @return stdClass
   *  A file object ready to be saved.
   */
  protected function createFileEntity($destination, $owner) {
    $file = clone $this->defaultFile;
    $file->uri = $destination;
    $file->uid = $owner;
    if (!isset($file->filename)) {
      $file->filename = drupal_basename($destination);
    }
    if (!isset($file->filemime)) {
      $file->filemime = file_get_mimetype(urldecode($destination));
    }
    if (!isset($file->status)) {
      $file->status = FILE_STATUS_PERMANENT;
    }
    if (empty($file->type) || $file->type == 'file') {
      // Try to determine the file type.
      if (module_exists('file_entity')) {
        $type = file_get_type($file);
      }
      elseif ($slash_pos = strpos($file->filemime, '/')) {
        $type = substr($file->filemime, 0, $slash_pos);
      }
      $file->type = isset($type) ? $type : 'file';
    }

    // Added to also save file entity fields.
    if (!empty($this->fields)) {
      foreach ($this->fields as $field => $value) {
        $file->$field = $value;
      }
    }

    // If we are replacing or reusing an existing filesystem entry,
    // also re-use its database record.
    if ($this->fileReplace == FILE_EXISTS_REPLACE ||
      $this->fileReplace == self::FILE_EXISTS_REUSE) {
      $existing_files = file_load_multiple(array(), array('uri' => $destination));
      if (count($existing_files)) {
        $existing = reset($existing_files);
        $file->fid = $existing->fid;
        $file->filename = $existing->filename;
      }
    }
    return $file;
  }
}

Thanks! May I suggest contributing over at https://www.drupal.org/node/2649330?