composite key in annotations

[rudresh kumar]

Hi All,

i have implemented the composite key in hbm file, which is as below (child.hbm)

<composite-id>
<key-many-to-one name="master" class="com.bo.master" column="MASTER_ID" ></key-many-to-one>
<key-property name="child" type="java.lang.Integer" column="CHILD_ID"></key-property>
</composite-id>

This works fine, but i would like to convert this into a annotations and remove the hbm files. Can i know how the definition would be for the annotations on the child class (com.bo.child) for composite key.

Thanks

[Cameron Wallace McKenzie]

I've got a "Team has many Players" example on Hibernate Tutorials Website that shows the basics of a one to many or many to one relationship mapped in Hibernate with JPA annotations:

   
public class Team {   
@OneToMany(mappedBy="team", 
             targetEntity=Player.class, 
              fetch=FetchType.EAGER,
               cascade=CascadeType.ALL)
public List<Player> getPlayers() {return players;}  
} 

  
 @Entity
public class Player {     
  @ManyToOne
  @JoinColumn(name="team_id")
  public Team getTeam() {return team;}     
} 

That demonstrates a simple relationship. Just apply the corresponding Team and Player values to your scenario, and you'll have it mapped!

Example of Mapping One To Many Associations with Hibernate and JPA Annotations

-Cameron McKenzie