PKPSubmissionFileDAO::_castToGenre PHP Method

    private function _castToGenre($submissionFile)
    {
        // Find the required target implementation.
        $targetImplementation = strtolower_codesafe($this->_getFileImplementationForGenreId($submissionFile->getGenreId()));
        // If the current implementation of the updated object
        // is the same as the target implementation, skip cast.
        if (is_a($submissionFile, $targetImplementation)) {
            return $submissionFile;
        }
        // The updated file has to be upcast by manually
        // instantiating the target object and copying data
        // to the target.
        $targetDaoDelegate = $this->_getDaoDelegate($targetImplementation);
        $targetFile = $targetDaoDelegate->newDataObject();
        $targetFile = $submissionFile->upcastTo($targetFile);
        return $targetFile;
    }