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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