@ManyToMany具有共享字段的复合键的两个实体

Question

两个实体：

public class Employee {
  Company company;
  Long employeeId;
}
public class Project {
  Company company;
  Long projectId;
  Collection<Employee> employees;
}

三张桌子：

• 主键为{companyId，projectId}
的项目
• 主键为{companyId，employeeId}
的员工
• Project_Employee，其主键为{companyId，projectId，employeeId}

xml中的映射：

<entity class="domain.Project">

 <attributes>
  <many-to-many name="employees" >
   <join-table name="PROJECT_EMPLOYEE">
    <join-column name="companyId" referenced-column-name="companyId"/>
    <join-column name="employeeId" referenced-column-name="employeeId" />
    <inverse-join-column name="companyId" referenced-column-name="companyId" />
    <inverse-join-column name="projectId" referenced-column-name="projectId" />
   </join-table>
  </many-to-many>  
 </attributes>

</entity>

我收到错误抱怨公司多次出现： 收集映射中的重复列：Project.employees列：companyId

Hibernate用

映射它

<formula>companyId</formula>

JPA 1.0是否支持此功能？