I change to hibernate 3.1 beta1 and hibernate-annotation 3.1 beta 2
now all my class that inherits from my BaseClass gime me an error

No identifier specified for entity: easysolution.persistence.hibernate.model.<My Class>

My BaseClass declare a property as

@Id(generate = GeneratorType.AUTO)
private long id;

and with hibernate 3.0 all is right

what's happened?
it's a bug?

Can you post your BaseClass and Subclass? What kind of Inheritance mapping are you using?


Here's an example of doing JOINED SUBCLASS Inheritance. In the following case, there exists only one table called SubClass


Class BaseClass {

@Id(generate=GeneratorType.AUTO)

private Long Id;
...
}

@Entity(/*access=AccessType.PROPERTY*/)
@org.hibernate.annotations.Entity(selectBeforeUpdate = false,
dynamicInsert = true,
dynamicUpdate = true,
optimisticLock = OptimisticLockType.VERSION )

@Table(name="SUB_CLASS")
@Inheritance(strategy = InheritanceType.JOINED)
Class SubClass extends BaseClass {
}

It works for me in both the previous version and 3.1 beta1

Oops just a typo.

The table name is SUB_CLASS.

@Entity(access = AccessType.FIELD)
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@DiscriminatorColumn(name = "type")
public abstract class PDataObject implements Serializable {

@Id(generate = GeneratorType.AUTO)
private long id;

@Column(length = 128, nullable = false)
private String eid;

.....





public abstract class PPrincipal extends PDataObject {

public PPrincipal() {
super();
}



......




@Entity(access = AccessType.FIELD)
public class PUser extends PPrincipal {

@Column(length = 32)
String firstName;

@Column(length = 32)
String lastName;

Here's what i tried to compile and it just worked! I think you are missing @Entity for PPrincipal class.


@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@DiscriminatorColumn(name = "type")
public abstract class BaseTest {
@Id(generate = GeneratorType.AUTO)
private long id;

@Column(length = 128, nullable = false)
private String eid;
}

@Entity
public abstract class BasePrincipal extends BaseTest {
}

@Entity
public class BaseUser extends BasePrincipal {
@Column(length = 32)
String firstName;

@Column(length = 32)
String lastName;
}


Hope this helps!

You are right :)

With 3.0 it works but I think was that the bug. Now is more correct to sign olso the Principal as @Entity.

Thanks

I'm glad it works.

Please rate the reply if worked :)

The notion of @EmbeddedSuperclass has been added, please read the reference documentation for more information

I create these classes:


@EmbeddableSuperclass(access = AccessType.FIELD)
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@DiscriminatorColumn(name = "classType")
public abstract class _DataObject implements Serializable {

@Id(generate = GeneratorType.AUTO)
private long id;

@Column(nullable = false)
private String classType = this.getClass().getName();

public String getClassType() {
return classType;
}

public void setClassType(String classType) {
this.classType = classType;
}

public long getId() {
return id;
}

public void setId(long id) {
this.id = id;
}

}





@EmbeddableSuperclass(access = AccessType.FIELD)
@Table(name = "Principal")
public abstract class Principal extends _DataObject {

@ManyToOne
private Group parentPrincipal;

public Group getParentPrincipal() {
return parentPrincipal;
}

public void setParentPrincipal(Group parentPrincipal) {
this.parentPrincipal = parentPrincipal;
}

}





@Entity(access = AccessType.FIELD)
public class User extends Principal {

@Column(nullable = false)
private String username;

private String password;

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

}






@Entity(access = AccessType.FIELD)
public class Group extends Principal {

@OneToMany
private Set<Principal> principals = new TreeSet<Principal>();

public Set<Principal> getPrincipals() {
return principals;
}

public void setPrincipals(Set<Principal> principals) {
this.principals = principals;
}

}




and DON'T WORK!!!!!!

with

hibernate-annotations-3.1beta3.zip
hibernate-3.1beta1.zip

why :( ????

I think the Hibernate team actually advise you to carry on using the alpha version and NOT to upgrade to the Beta release if you are using Annotations/Entity Manager. And I quote:

"If you use Hibernate Annotations and/or Hibernate EntityManager, please continue using the 3.1 alpha 1 release. An update is already in the works. Use Hibernate 3.1 beta 1 in non-critical development as an update of 3.0.5."

...maybe that is for a reason? Just thought this could save you time rooting for a solution - go back to the alpha. ;)

annotations 3.1beta4 n ow work with hibernate beta1