ManyToOne annotation fails with Hibernate 4.1: MappingException
- by barelas
Using Hibernate 4.1.1.Final.
When I try to add @ManyToOne, schema creation fails with: org.hibernate.MappingException: Could not instantiate persister org.hibernate.persister.entity.SingleTableEntityPersister
User.java:
@Entity
public class User {
@Id
private int id;
public int getId() {return id;}
public void setId(int id) {this.id = id;}
@ManyToOne
Department department;
public Department getDepartment() {return department;}
public void setDepartment(Department department) {this.department = department;}
}
Department.java
@Entity
public class Department {
@Id
private int departmentNumber;
public int getDepartmentNumber() {return departmentNumber;}
public void setDepartmentNumber(int departmentNumber) {this.departmentNumber = departmentNumber;}
}
hibernate.properties:
hibernate.connection.driver_class=com.mysql.jdbc.Driver
hibernate.connection.url=jdbc:mysql://localhost:3306/dbname
hibernate.connection.username=user
hibernate.connection.password=pass
hibernate.connection.pool_size=5
hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
hibernate.hbm2ddl.auto=create
init (throwing exception):
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().buildServiceRegistry();
sessionFactory = new MetadataSources(
serviceRegistrY.addAnnotatedClass(Department.class).addAnnotatedClass(User.class).buildMetadata().buildSessionFactory();
exception throwed at init:
org.hibernate.MappingException: Could not instantiate persister org.hibernate.persister.entity.SingleTableEntityPersister
at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:174)
at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:148)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:820)
at org.hibernate.metamodel.source.internal.SessionFactoryBuilderImpl.buildSessionFactory(SessionFactoryBuilderImpl.java:65)
at org.hibernate.metamodel.source.internal.MetadataImpl.buildSessionFactory(MetadataImpl.java:340)
I have tried adding some other annotations, but shouldn't the defaults work and create the tables and foreign key? If I remove the department from User, tables get generated fine.
Thanks in advance!
