帶複合鍵的加入實體

Question

我有兩個用於複合鍵的遺留數據庫的實體，其中一個具有@EmbeddedId註釋的複合鍵。

// first entity 
@Entity 
public class Product { 

@Id 
private Integer productId; 

// lookup table contains code-description pairs 
@OneToOne 
private ProductDefects defects; 

//getters and setters and other code omitted 

} 

// lookup entity 
@Entity 
public class ProductDefects { 

@EmbededId 
private ProductDefectsPK id; 

//getters and setters and other code omitted 

} 

//composite key 
@Embedable 
public class ProductDefectsPk{ 
    private Integer realId; 
    private String category; 
} 

我應該如何界定@OneToOne關係加入如下面的例子：

select p.Id, pd.description 
from Product p 
inner join p.defects pd 

Answer 1

我弄清楚，@MapsId標註在我的情況下幫助http://download.oracle.com/javaee/6/api/javax/persistence/MapsId.html