Problem with Embeddable

orribl · **Joined:** Thu Jun 14, 2007 8:10 am **Posts:** 7

Hi,

I have a problem, I don't know exactly if it's a hibernate or a spring problem:

I have 2 tables:
FirstTable

FirstTablePK(PK)
Name

SecondTable

FirstTablePK(FK)(PK)
SecondTablePK(PK)
Name

and 2 classes to map the tables:

Class1:

Code:

@Entity
@Table(name="FirstTable")
public class FirstClass implements Serializable{
   @Id
   @Column(name="FirstTablePK")
   @Type(type="integer")
   private Integer id;

   @Column(name="Name")
   @Type(type="string")
   private String name;
} 

Class2:

Code:

@Entity
@Table(name="SecondTable)
public class SecondClass implements Serializable{
   @Id
   private SecondTablePK id;

   @Column(name="Name")
   @Type(type="string")
   private String name;

   @Embeddable
   public class SecondTablePK implements Serializable{
      public SecondTablePK(){}
      @Column(name="SecondTablePK")
      private Integer id;
      @ManyToOne
      @JoinColumn(name="FirstTablePK")
      private FirstClass firstClassImpl.
   }
} 

When I try to run this I get the following exception:

Quote:

org.springframework.orm.hibernate3.HibernateSystemException: SecondClass$SecondTablePK; nested exception is org.hibernate.InstantiationException: No default constructor for entity: SecondClass$SecondTablePK

although I have a default constructor....

Any ideas...?

cbredesen · **Posted:** Wed Aug 08, 2007 4:14 pm

Try to instantiate that class yourself :)

http://www.brpreiss.com/books/opus5/html/page602.html

Cheers,

Chris