OpenJPA:未找到AttributeOverride的超类属性

当尝试使用AttributeOverride注释映射继承的属性时，OpenJPA抛出一个错误，它无法在超类中找到该属性。我不知道如何用正确的方式绘制这张地图

错误

Embedded属性“Order.mailingAddress”声明了“addressLine”的映射重写，但这不是嵌入类型中的持久属性。

代码

@Embeddable
public class Address{
    private String addressLine;
    private String city;
    private String state;
    private String zip;

    //getters and setters
}

@Embeddable
public class ExtendedAddress extends Address{
    private String additionalAddressLine;

    //getters and setters
}

@Entity
public class Order {
    @Id
    private id;

    @OneToOne
    private Customer customer;

    @Embedded
    @AttributeOverrides(value={
            @AttributeOverride(name="addressLine", 
                 column=@Column(name="mailingAddressLine")),
            @AttributeOverride(name="additionalAddressLine", 
                  column=@Column(name="mailingAddressLine2")),
            @AttributeOverride(name="city", 
                  column=@Column(name="mailingAddressCity")),
            @AttributeOverride(name="state", 
                  column=@Column(name="mailingAddressState")),
            @AttributeOverride(name="zip", 
                  column=@Column(name="mailingAddressZip")),
    })
    private ExtendedAddress mailingAddress;

    @Embedded
    @AttributeOverrides(value={
            @AttributeOverride(name="addressLine", 
                 column=@Column(name="billingAddressLine")),
            @AttributeOverride(name="city", 
                  column=@Column(name="billingAddressCity")),
            @AttributeOverride(name="state", 
                  column=@Column(name="billingAddressState")),
            @AttributeOverride(name="zip", 
                  column=@Column(name="billingAddressZip")),
    })
    private Address billingAddress;

    //getters and setters
    //hashcode
    //equals
}

SQL

---

将嵌入文件（地址和扩展地址）中的访问级别从private更改为protected或default

CREATE TABLE Orders (
  id INT PRIMARY KEY GENERATED ALWAYS,
  mailingAddressLine VARCHAR(45) DEFAULT NULL,
  mailingAddressLine2 VARCHAR(45) DEFAULT NULL,
  mailingAddressCity VARCHAR(45) DEFAULT NULL,
  mailingAddressState CHAR(2) DEFAULT NULL,
  mailingAddressZip CHAR(9) DEFAULT NULL,
  billingAddressLine VARCHAR(45) DEFAULT NULL,
  billingAddressCity VARCHAR(45) DEFAULT NULL,
  billingAddressState CHAR(2) DEFAULT NULL,
  billingAddressZip CHAR(9) DEFAULT NULL
)