JPA-RS中的双向OneToOne关系不可遍历

Question

我使用下面的简单实体来探索jpa-rs：

@Entity
public class Employee {

    @Id
    @GeneratedValue
    private int id;
    private String name;

    @OneToOne
    private Address address;
}

@Entity
public class Address {

    @Id
    @GeneratedValue
    private int id;
    private String street;
    private String city;

    @OneToOne(mappedBy = "address")
    private Employee employee;
}

创建一个Employee关系Address的实体就像一个魅力：

{
  "name": "John Doe",
  "address": {
    "street": "Street No. 1",
    "city": "A City"
  }
}

但我不能像{HATEOAS提议的那样遍历_link s所产生的对象 Eclipselink wiki（http://wiki.eclipse.org/EclipseLink/Examples）中提供的students示例可以轻松实现。 据我所知，我应该能够做到以下几点：

1. 获取ID为1的员工：GET url / entity / Employee / 1：

   {
   "id": 1,
   "name": "John Doe",
   "_relationships": [
   {
     "_link": {
       "href": "url/entity/Employee/1/address",
       "rel": "address"
     }
   }
   ],
   "address": {
   "_link": {
     "href": "url/entity/Address/2",
     "method": "GET",
     "rel": "self"
   }
   },
   "staff": []
   }

2. 获取员工的地址：GET url / entity / Address / 2：

   {
   "city": "A City",
   "id": 2,
   "street": "Street No. 1",
   "_relationships": [
   {
     "_link": {
       "href": "url/entity/Address/2/employee",
       "rel": "employee"
     }
   }
   ]
   }

3. 现在让我们从这里回到员工：GET url / entity / Address / 2 / employee - ＆gt; http状态400

在上面提到的例子中，我可以使用关系的所有链接进行完美导航。

p.s。：我想标记这个JPA-RS，但我没有足够的声誉来创建新标签。