Unkown entity runtime error for annotated class

castortroy · **Joined:** Tue Jan 31, 2006 2:30 am **Posts:** 12

I have successfully created a simple test project using hibernate and am now in the process of learning hibernate annotations. When I set the precedence of the AnnotationConfiguration to the default "hbm", I don't get any errors. However, when I change it to "class" so that it will use my code annotations, I get an unknown entity error in my Person class.

Hibernate version:
hibernate v3.1.1
hibernate-annotations 3.1 beta8

Mapping documents:
This is my hbm.xml for my Person class

Code:

   <class name="contacts.Person" table="PERSONS">
      <id name="id" column="PERSON_ID">
         <generator class="native"/>
      </id>
      
      <property name="birthDay" type="date" column="BIRTHDAY"/>
      <property name="firstName"/>
      <property name="lastName"/>

my hibernate.cfg.xml

Code:

<hibernate-configuration>
   <session-factory>
      <!-- Database connection settings -->
      <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
      <property name="connection.url">jdbc:hsqldb:hsql://localhost</property>
      <property name="connection.username">sa</property>
      <property name="connection.password"></property>
      
      <!-- JDBC connection pool (use the built-in) -->
      <property name="connection.pool_size">1</property>
      
      <!-- SQL dialect -->
      <property name="dialect">org.hibernate.dialect.HSQLDialect</property>
      
      <!-- Enable Hibernate's automatic session context management -->
      <property name="current_session_context_class">thread</property>
      
      <!-- Disable the second-level cache -->
      <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
      
      <!-- Echo all executed SQL to stdout -->
      <property name="show_sql">true</property>
      
      <!-- Drop and re-create the database schema on startup -->
      <property name="hbm2ddl.auto">update</property>
      
      <mapping class="contacts.Person"/>      
      <mapping resource="contacts/Person.hbm.xml"/>


   </session-factory>

my HibernateUtil

Code:

public class HibernateUtil
{
   private static final SessionFactory   sessionFactory;

   static
   {
      try
      {
         AnnotationConfiguration cfg = new AnnotationConfiguration();
         cfg.configure("hibernate.cfg.xml");
         cfg.setPrecedence("class");
         sessionFactory = cfg.buildSessionFactory();
      }
      catch (Throwable ex)
      {
         // Make sure you log the exception, as it might be swallowed
         System.err.println("Initial SessionFactory creation failed." + ex);
         throw new ExceptionInInitializerError(ex);
      }
   }
   
   public static Session getSession()
      throws HibernateException
   {
      return sessionFactory.openSession();
   }
}

When I set the precedence to "hbm", it works fine. But when I set it to "class", I get the error

Full stack trace of any exception that occurs:

Can you guys tell me what I did wrong in the way I used hibernate annotations?

castortroy · **Joined:** Tue Jan 31, 2006 2:30 am **Posts:** 12

Here is how I defined the Person class.

Code:

package ingeni.training.contacts;

import java.util.Date;

import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import org.hibernate.annotations.Entity;
import org.hibernate.annotations.Table;

@Entity
@Table (name="tbl_person")
public class Person
{
   private Long   id;

   private String   firstName;

   private String   lastName;
   
   private Date   birthDay;


   @Temporal (TemporalType.DATE)
   public Date getBirthDay()
   {
      return birthDay;
   }


   public void setBirthDay(Date birthDay)
   {
      this.birthDay = birthDay;
   }


   public String getFirstName()
   {
      return firstName;
   }


   public void setFirstName(String firstName)
   {
      this.firstName = firstName;
   }


   @Id @GeneratedValue
   public Long getId()
   {
      return id;
   }


   private void setId(Long id)
   {
      this.id = id;
   }


   public String getLastName()
   {
      return lastName;
   }


   public void setLastName(String lastName)
   {
      this.lastName = lastName;
   }
}

emmanuel · **Posted:** Wed Feb 08, 2006 2:20 pm

you map the same entity twice? don't do that

castortroy · **Joined:** Tue Jan 31, 2006 2:30 am **Posts:** 12

In the annotations manual, it said you can have 2 mappings. One using the annotations, the other using the hbm.xml mapping file. If there is a conflict, it will pick the hbm.xml (default option). When I set the setPrecedence property to "hbm" it works fine. But if I change it to "class" so that it will use the annotated values, it gives me an error.

I also tried just removing the hbm.xml mapping file so that my annotations will be used. But it still results in an error

emmanuel · **Posted:** Thu Feb 09, 2006 9:55 am

It should work. Can you provide a runnable testcase involving 1 class (annotated and with it's hbm file) that actually fails to load (ie query not possible for eg) on JIRA, I'll have a look

yamanyar · **Joined:** Thu Mar 17, 2005 4:57 am **Posts:** 4

I had the same problem and when i changed by import statements from

Code:

import org.hibernate.annotations.Entity; 
import org.hibernate.annotations.Table;

to

Code:

import javax.persistence.Entity;
import javax.persistence.Table;

it worked. I know that this can not be the solution but may help you to determine the problem. So it validates (at least for me) that all of my settings are true for providing the right platform in order to make hibernate work but it does not.. you may see my post about that:

http://forum.hibernate.org/viewtopic.php?t=955374

with a title of "org.hibernate.annotations.* OR import javax.persistence.*"

[/code]

castortroy · **Joined:** Tue Jan 31, 2006 2:30 am **Posts:** 12

Wow, thanks a lot!!!
That fixed my problem.