I have two entities that are sharing a primary key using @PrimaryKeyJoinColumn. When the schema is created with hbm2ddl, no foreign key constraint is add. Is there an extra annotation that I need to use to get the constraint generated? I'm using Seam 2.0.0.GA on JBoss 4.2.2.GA. My Hibernate dependencies look like this:

[INFO] +- org.hibernate:hibernate:jar:3.2.4.sp1:provided
[INFO] | +- javax.transaction:jta:jar:1.0.1B:provided
[INFO] | +- asm:asm-attrs:jar:1.5.3:provided
[INFO] | +- antlr:antlr:jar:2.7.6:provided
[INFO] | +- cglib:cglib:jar:2.1_3:provided
[INFO] | \- asm:asm:jar:1.5.3:provided
[INFO] +- org.hibernate:hibernate-annotations:jar:3.3.0.ga:provided
[INFO] +- org.hibernate:hibernate-entitymanager:jar:3.3.1.ga:provided
[INFO] | +- org.hibernate:hibernate-commons-annotations:jar:3.0.0.ga:provided
[INFO] | \- jboss:jboss-common-core:jar:2.0.4.GA:provided
[INFO] +- org.hibernate:hibernate-validator:jar:3.0.0.GA:provided

@Entity
@Name( "user" )
@Scope( SESSION )
@Table( name = "WEB_USER" )
public class User implements Serializable
{
 private String id;
 private Profile profile;

 @Id
 @NotNull
 @GeneratedValue( strategy = GenerationType.AUTO )
 @Column( name = "WEB_USER_ID" )
 public String getId()
 {
 return id;
 }

 public void setId( String id )
 {
 this.id = id;
 }

 @OneToOne( cascade = CascadeType.ALL )
 @PrimaryKeyJoinColumn
 public Profile getProfile()
 {
 return profile;
 }

 public void setProfile( Profile profile )
 {
 this.profile = profile;
 }
}

@Entity
@Name( "profile" )
@Table( name = "WEB_USER_PROFILE" )
public class Profile implements Serializable
{
 private String id;

 @Id
 @Column( name = "WEB_USER_ID", nullable = false )
 public String getId()
 {
 return id;
 }

 public void setId( String id )
 {
 this.id = id;
 }
}