Java EclipseLink DDL生成错误

当一个

可嵌入的

类有另一个

实体

O/R映射注释时，我无法使用

EclipseLink

生成DDL。 如何为我的O/R映射生成DDL

Company.java

@Entity
public class Company implements Serializable {
    .....

    @Embedded
    private CompanyAddress address;
}

CompanyAddress.java

@Embeddable
public class CompanyAddress implements Serializable {
    .....

    @Embedded
    @OneToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "TOWNSHIP_ID", referencedColumnName = "ID")
    private Township township;
}   

town.java

@Entity
public class Township implements Serializable {
    .....
}

当我生成时，我得到以下错误：

Exception [EclipseLink-195] (Eclipse Persistence Services - 2.1.2.v20101206-r8635): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The shared class org.ace.insurance.system.common.company.CompanyAddress must not reference the isolated class org.ace.insurance.system.common.township.Townsh
ip.
Mapping: org.eclipse.persistence.mappings.OneToOneMapping[township]
Descriptor: RelationalDescriptor(org.ace.insurance.system.common.company.CompanyAddress --> [DatabaseTable(COMPANY)])

---

如果我理解正确的话，你希望乡镇成为一个正常的独立实体。在这种情况下，您应该从CompanyAddress中的Town字段中删除@Embedded注释。如果您想将其嵌入，则需要@embedded注释而不是@Entity。

谢谢您的帮助，我认为JPA规范允许

embedded

类与其他

实体进行O/R映射。