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我的数据模型代表法律实体,例如商业或个人.两者都是纳税实体,并且都有一个TaxID,电话号码的集合,和邮寄地址的集合.

我有一个Java模型,有两个扩展抽象类的具体类.抽象类具有两个具体类共有的属性和集合.

AbstractLegalEntity        ConcreteBusinessEntity    ConcretePersonEntity
-------------------        ----------------------    --------------------
Set<Phone> phones          String name               String first
Set<Address> addresses     BusinessType type         String last
String taxId                                         String middle

Address                    Phone
-------                    -----
AbsractLegalEntity owner   AbstractLegalEntity owner
String street1             String number
String street2           
String city
String state
String zip

我在MySQL数据库上使用Hibernate JPA Annotations,其类如下所示:

@MappedSuperclass
public abstract class AbstractLegalEntity {
    private Long id;  // Getter annotated with @Id @Generated
    private Set<Phone> phones = new HashSet<Phone>();  // @OneToMany
    private Set<Address> address = new HashSet<Address>(); …