@PrimaryKeyJoinColumn doesn't exist!!!

alots_ssa · **Joined:** Fri Sep 02, 2005 3:42 pm **Posts:** 32

Hy people, i can't import annotation @PrimaryKeyJoinColumn in my projetc and i don't know why. I put the ejb3.0 jar file in my classpath, all hibernate jars file in my classpath and i can't import this annotation. Someone knows why?

Thanks,

Alberto

emmanuel · **Posted:** Mon Oct 24, 2005 5:43 am

you might use a very old ejb3 jar file.

alots_ssa · **Joined:** Fri Sep 02, 2005 3:42 pm **Posts:** 32

Thanks Emmanuel, i have another question about the hibernate mapping. Why When i am trying map a inheritance with hibernate, it is creating a big table with all properties of the classes that extends the super class. If you know anything about this please answer me.

Thanks,

Alberto

xiangya · **Joined:** Tue Sep 13, 2005 10:57 pm **Posts:** 10

hi, you can use table_per_class or join inheritance strategy.if used table_per_class, id cannot use auto id,you can use table id.

alots_ssa · **Joined:** Fri Sep 02, 2005 3:42 pm **Posts:** 32

I'm sorry xiangya, i didn't understand what you tried to explain me. I'm posting my class here for you take look. If can you modifie my class i will apreciate too much.

Code:

@Entity
@InheritanceJoinColumn(name="cod_Periferico")
@Table(name="Hd")
public class Hd extends Periferico{
    //private Long cod_Periferico;
    private long tamanho;    
    /*@Id (generate=GeneratorType.AUTO)
   public Long getCod_Periferico() {
       
      return cod_Periferico;
   }
   public void setCod_Periferico(Long cod_Periferico) {
      this.cod_Periferico = cod_Periferico;
   }*/
   public long getTamanho() {
      return tamanho;
   }
   public void setTamanho(long tamanho) {
      this.tamanho = tamanho;
   }
   public Hd(){
      
   }
}

xiangya · **Joined:** Tue Sep 13, 2005 10:57 pm **Posts:** 10

hi,maybe this can help:

Code:

//all inherited object shared one id spaces.
@Entity
@Inheritance(strategy = InheritanceType.JOINED)
[abstract] class Pref...{
  @Id(generate = GeneratorType.AUTO)
  getId(){...}
}
@Entity
class Hd extends Pref...{
}

Code:

@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
[abstract] class Pref...{
  //cannot use auto id, if Table_per_class, 
  //others generated id; 
  @Id(generate = GeneratorType.TABLE)
  getId(){...}
}
@Entity
class Hd extends Pref...{
}

alots_ssa · **Joined:** Fri Sep 02, 2005 3:42 pm **Posts:** 32

I'm sorry xiangya, but hibernate still creates one big table. I don't know why? In the hibernate documentation the explanation is like that you gave me. If you have any other ideas, please, post here. I'm still trying here.

Thanks,

Alberto

xiangya · **Joined:** Tue Sep 13, 2005 10:57 pm **Posts:** 10

Hi,It's my sorry,
if you want a big table,
you can use InheritanceType.SINGLE_TABLE with discriminator.
like this:

Code:

@Entity()
@Inheritance(strategy=InheritanceType.SINGLE_TABLE,
discriminatorType=DiscriminatorType.STRING,
discriminatorValue="Periferico")
@DiscriminatorColumn(name="PerifericoType")
public class Periferico{ ... }

@Entity()
@Inheritance(discriminatorValue="HD")
public class Hd extends Periferico { ... }

alots_ssa · **Joined:** Fri Sep 02, 2005 3:42 pm **Posts:** 32

I'm sorry again. I don't want a big table. The thing is, when i put that configuration like you say(@Entity
@Inheritance(strategy = InheritanceType.JOINED)
) hibernate still creates a big table for me. Do you know why?

Thanks,

Alberto

emmanuel · **Posted:** Wed Oct 26, 2005 4:28 pm

Check you code, it should work. Look at the unit test suite and change it until you reach your domain model