Hi,
I'm having trouble mapping a class with a composite id. I don't know why, but when I try to open a hibernate session it throws a NullPointerException.
Here's the code:
Code:
@Entity
@Table(name = "bo_users")
public class Users implements Serializable {
@Id
@Column(length = 20, nullable = false)
private String username;
@Column(length = 20, nullable = false)
private String password;
@OneToMany
private List<MonitoredUsers> monitoredUsers;
}
@Embeddable
public class MonitoredUsersPk implements Serializable {
@ManyToOne
private Users user;
private String monitoredUser;
}
@Entity
@Table(name = "bo_monitored_users")
public class MonitoredUsers implements Serializable {
@Id
private MonitoredUsersPk pk;
}
Here's the sessionFactory:
Code:
static {
try {
sessionFactory = new AnnotationConfiguration().
setProperty("hibernate.session_factory_name", "BOConnection").
setProperty("hibernate.hbm2ddl.auto", "update").
setProperty("hibernate.dialect", "org.hibernate.dialect.SQLServerDialect").
setProperty("hibernate.show_sql", "false").
setProperty("hibernate.order_updates", "true").
setProperty("hibernate.cglib.use_reflection_optimizer", "true").
setProperty("hibernate.connection.driver_class", "com.microsoft.sqlserver.jdbc.SQLServerDriver").
setProperty("hibernate.connection.url", "jdbc:sqlserver://localhost\SQLEXPRESS;integratedSecurity=true").
setProperty("hibernate.connection.autocommit", "false").
setProperty("hibernate.c3p0.min_size", "0").
setProperty("hibernate.c3p0.max_size", "100").
setProperty("hibernate.c3p0.timeout", "60").
setProperty("hibernate.c3p0.max_statements", "0").
addAnnotatedClass(Users.class).
addAnnotatedClass(MonitoredUsersPk.class).
addAnnotatedClass(MonitoredUsers.class).
buildSessionFactory();
} catch (Throwable ex) {
throw new ExceptionInInitializerError(ex);
}
}
And the stack trace when I call openSession:
Code:
java.lang.ExceptionInInitializerError
at br.com.cedro.database.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:57)
at br.com.cedro.config.InitListener.contextInitialized(InitListener.java:87)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3830)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4337)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.NullPointerException
at org.hibernate.cfg.AnnotationConfiguration.processFkSecondPassInOrder(AnnotationConfiguration.java:416)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:309)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1319)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
at br.com.cedro.database.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:55)
... 16 more
I really don't know what I'm doing wrong.
I'm using hibernate 3.2 and hibernate annotations 3.3.
Thanks for helping.
Login
FAQ
Search