[jboss-user] [Persistence, JBoss/CMP, Hibernate, Database] - Advanced problems with Jboss and Hibernate !

[DivxYoda]

Hi every body,
Look at these classes examples to see my problems with hibernate on jboss (for a mySql database) and understand what i want to do :

@Entity
@Table(name=Mother)
@Inheritance(strategy = InheritanceType.JOINED)
public class Mother implements Serializable{
 @Id 
 private String mother_id;
 public Mother(){}

 //... getters/setters generated for all fields members
}

Note : The Mother table has a single primary key : its id 



@Embeddable
public Class DaughterKey implements Serializable{
  private String mother_Id;
  private String daughter_id;
  public DaughterKey(){}

  //getters/setters generated for the both fields

  // the methods : toString(),hasCode(),equals()  are overrided
}

Note : the DaughterKey is a class that specifies (according to my understandings) a composite primary key class when mappings happen !



@Entity
@Table(name = "Daughter")
@IdClass(DaughterKey.class)
@PrimaryKeyJoinColumn(name = "Mother_id")
public class Daughter extends Mother{
 @Id 
 private String daughter_id;
 public Daughter(){ super();}
 
 //.. getter/setter for all fields  
}

Note: the Daughter table has a composite key (mother_Id+daughter_id).




So,the idea is that eventhough a Daughter Class extends a Mother Class, the Daughter must have 2 fields-members as PrimaryKey in the Database (the mother_id and its own daughter_id) : a composite key.

After compiling and creating a JAR file, I try to deploy the JAR-file and i have a such exception : 

java.lang.reflect.InvocationTargetException
//.... at ....
caused by

org.hibernate.AnnotationException : Unable to define/override @Id(s) on a subclass : Daughter.

Thanks a lot if someOne can help me, I know that it's because my conception is not correct but I can't get any better ided.


PS : Ask your questions, if you don't understand my idea !
Best regards, Divx.

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