Can not use PrimaryKeyJoinColumns

[adver11]

@ManyToOne
@PrimaryKeyJoinColumns({
@PrimaryKeyJoinColumn(name="DESK_ZONE"),
@PrimaryKeyJoinColumn(name="DESK_ID")
})
private Chkin_desk CHKIN_DESK;

show me:The annotation @PrimaryKeyJoinColumns is disallowed for this location

Why? How to use it?

[pimpf]

The PrimaryKeyJoinColumn annotation is used to join the primary table of an entity subclass in the JOINED mapping strategy to the primary table of its superclass; it is used with a SecondaryTable annotation to join a secondary table to a primary table; and it may be used in a OneToOne mapping in which the primary key of the referencing entity is used as a foreign key to the referenced
entity.

The PrimaryKeyJoinColumn annotation specifies a primary key column that is used as a foreign key to join to another table.

Example (from the spec):

public class EmpPK {
public Integer id;
public String name;
}

@Entity
@IdClass(com.acme.EmpPK.class)
public class Employee {

@Id Integer id;
@Id String name;

@OneToOne
@PrimaryKeyJoinColumns({
@PrimaryKeyJoinColumn(name="ID",
referencedColumnName="EMP_ID"),
@PrimaryKeyJoinColumn(name="NAME",
referencedColumnName="EMP_NAME")})
EmployeeInfo info;
...
}

@Entity
@IdClass(com.acme.EmpPK.class)
public class EmployeeInfo {
@Id @Column(name="EMP_ID")
Integer id;
@Id @Column(name="EMP_NAME")
String name;
...
}

In your case you can use @JoinColumns like this:
@ManyToOne
@JoinColumns({
@JoinColumn(name="DESK_ZONE",referencedColumnName="ZONE"),
@JoinColumn(name="DESK_ID", referencedColumnName=="ID")
})
private Chkin_desk CHKIN_DESK;



Or better take a look at the spec:
9.1.6 JoinColumn Annotation
and
9.1.7 JoinColumns Annotation

[adver11]

thank pimpf.

I test it like this:

EmpPK.java

public class EmpPK {
 public Integer id;
 public String name;
}

EmployeeInfo.java

@Entity
@IdClass(EmpPK.class)
public class EmployeeInfo {
 @Id @Column(name="EMP_ID")
 Integer id;
 @Id @Column(name="EMP_NAME")
 String name;
 ...
}

Employee.java

@Entity
@IdClass(EmpPK.class)
public class Employee {

 @Id Integer id;
 @Id String name;

 @OneToOne
 @PrimaryKeyJoinColumns ({
 @PrimaryKeyJoinColumn(name="ID", referencedColumnName="EMP_ID"),
 @PrimaryKeyJoinColumn(name="NAME", referencedColumnName="EMP_NAME")
 })
 EmployeeInfo info;
 ...
}

the Employee.java shows that have a problem about @PrimaryKeyJoinColumns.
the problem is : The annotation @PrimaryKeyJoinColumns is disallowed for this location

I make this Example within JBoss-4.0.4RC1, and using JBossIDE-1.5.1.GA.
I think it's a bug.