public class MessageDetailRowMapper implements RowMapper {
    public Object mapRow(ResultSet rs, int rowNum) {
        MessageDetail detail = new MessageDetail();
        detail.setMessageId(rs.getLong(1));
        // 10 lines of populating the detail

        detail.setStatus(getStatus(detail));
    }

    private int getStatus(MessageDetail messageDetail) {
        if (messageDetail.getDeletedDate() != null) {
            return MessageSummary.DELETED;
        } else if (messageDetail.getReadDate() != null) {
            return MessageSummary.READ;
        } else {
            return MessageSummary.NEW;
        }
    }
}