JPA 2.1 Hibernate中的NamedSubgraph忽略嵌套子图

我正在使用Hibernate 4.3.8.FINAL并且具有以下模型，其中Department有许多Employees，Employee可以是Manager。 经理有一套Foo，可以是Foo或Bar。

员工实体：

@Entity @Table(name = "employee", schema = "payroll") @Inheritance(strategy = InheritanceType.JOINED) public class Employee { @Id private Long id; @Basic(optional = false) @Column(name = "name") private String name; @JoinColumn(name = "department_id", referencedColumnName = "id") @ManyToOne(optional = false, fetch = FetchType.LAZY) private Department department; } 

经理实体：

 @Entity @Table(name = "manager", schema = "payroll") @Inheritance(strategy = InheritanceType.JOINED) @PrimaryKeyJoinColumn(name = "employee_id", referencedColumnName = "id") public class Manager extends Employee { @Basic(optional = false) @Column(name = "car_allowance") private boolean carAllowance; @OneToMany(cascade = CascadeType.ALL, mappedBy = "manager", fetch = FetchType.LAZY) private Set fooSet; } 

Foo实体：

 @Entity @Table(name = "foo", schema = "payroll") @Inheritance(strategy = InheritanceType.JOINED) public class Foo { @Id private Long id; @Basic(optional = false) @Column(name = "name") private String name; @JoinColumn(name = "manager_id", referencedColumnName = "id") @ManyToOne(fetch = FetchType.LAZY) private Manager manager; } 

酒吧实体：

 @Entity @Table(name = "bar", schema = "payroll") @Inheritance(strategy = InheritanceType.JOINED) @PrimaryKeyJoinColumn(name = "foo_id", referencedColumnName = "id") public class Bar extends Foo { @Basic(optional = false) @Column(name = "name") private Long size; } 

部门实体：

 @NamedEntityGraph( name = "Graph.Department.Employees", includeAllAttributes = false, attributeNodes = { @NamedAttributeNode(value = "name"), @NamedAttributeNode(value = "employees", subgraph = "FetchManagers.Subgraph.Employees") }, subgraphs = { @NamedSubgraph( name = "FetchManagers.Subgraph.Employees", type = Employee.class, attributeNodes = { @NamedAttributeNode(value = "name") } ), @NamedSubgraph( name = "FetchManagers.Subgraph.FooBar", type = Foo.class, attributeNodes = { @NamedAttributeNode(value = "name") } ) }, subclassSubgraphs = { @NamedSubgraph( name = "FetchManagers.Subgraph.Employees", type = Manager.class, attributeNodes = { @NamedAttributeNode(value = "carAllowance"), @NamedAttributeNode(value = "fooSet", subgraph = "FetchManagers.Subgraph.FooBar") } ), @NamedSubgraph( name = "FetchManagers.Subgraph.FooBar", type = Bar.class, attributeNodes = { @NamedAttributeNode(value = "size") } ) } ) @Entity @Table(name = "department", schema = "payroll") public class Department { @Id private Long id; @Basic(optional = false) @Column(name = "name") private String name; @OneToMany(cascade = CascadeType.ALL, mappedBy = "department", fetch = FetchType.LAZY) private Set employees; } 

如部门实体所示，我正在尝试使用另一个子图FetchManagers.Subgraph.FooBar加载管理器的fooSet。 但是，这似乎完全被忽略了，结果查询不会与foo或bar表连接（请参阅下面的查询）。

 SELECT department0_.id AS id1_153_0_, employees1_.id AS id1_154_1_, department0_.name AS name2_153_0_, employees1_.department_id AS departme3_154_1_, employees1_.name AS name2_154_1_, employees1_1_.car_allowance AS car_allo1_156_1_, CASE WHEN employees1_1_.employee_id IS NOT NULL THEN 1 WHEN employees1_.id IS NOT NULL THEN 0 END AS clazz_1_, employees1_.department_id AS departme3_153_0__, employees1_.id AS id1_154_0__ FROM payroll.department department0_ LEFT OUTER JOIN payroll.employee employees1_ ON department0_.id=employees1_.department_id LEFT OUTER JOIN payroll.manager employees1_1_ ON employees1_.id=employees1_1_.employee_id WHERE department0_.id=? 

是否支持此类型的嵌套子图？ 或者我错过了什么？