解析 JPA 注解

Question

我可以使用 RascalMPL 从 Java 文件解析 JPA 注释吗？就像下面的

@Entity
public class Customers {
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Id
    @Column(name = "CustomerID", nullable = false)
    private Integer customerId;
    @Basic
    @Column(name = "CustomerName", nullable = true, length = 50)
    private String customerName;
    @Basic
    @Column(name = "ContactName", nullable = true, length = 50)
    private String contactName;
    @Basic
    @Column(name = "Address", nullable = true, length = 50)
    private String address;
    @Basic
    @Column(name = "City", nullable = true, length = 20)
    private String city;
    @Basic
    @Column(name = "PostalCode", nullable = true, length = 10)
    private String postalCode;
    @Basic
    @Column(name = "Country", nullable = true, length = 15)
    private String country;
    @OneToMany(mappedBy = "customersByCustomerId")
    private Collection<Orders> ordersByCustomerId;

    .....

}

我已经成功地用 Rascal 的 createM3FromFile 和 createAstFromFile 解析了文件，但我不确定如何遍历它来提取注释。