I have a many to one relationship between 2 classes A and B(a->B). I want to use annotations unfortunately there are many classes to be converted in my project( hibernate + spring integrated ). I ended up changing only Class B to annotations and class A will have the old hbm mapping file itself..

While doing so i get an exception creating sessionFactory "An association from the table A refers to an unmapped class: B"

I am using AnnotationSessionFactoryBean.. Shown below is my context file.
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotati on.AnnotationSessionFactoryBean">
<property name="configLocation">
<value>classpath:/hibernate.cfg.xml</value>
</property>
<property name="annotatedClasses">
<list>
<value>pack.MyClass</value>
</list>
</property>
</bean>

I was successfully annotating MyClass. Class A is having many-to-one association with Class B. Now i try to annotate class B and class A will have hbm mapping. I am not able to do it.
When deploying i get the error message as below:::

Caused by: org.hibernate.MappingException: An association from the table my_table1 refers to an unmapped class: pack.ClassB
at org.hibernate.cfg.Configuration.secondPassCompileF oreignKeys(Configuration.java:1258)
at org.hibernate.cfg.Configuration.secondPassCompile( Configuration.java:1176)
at org.hibernate.cfg.AnnotationConfiguration.secondPa ssCompile(AnnotationConfiguration.java:296)
at org.hibernate.cfg.Configuration.buildMappings(Conf iguration.java:1121)
at org.springframework.orm.hibernate3.LocalSessionFac toryBean.buildSessionFactory(LocalSessionFactoryBe an.java:674)
at org.springframework.orm.hibernate3.AbstractSession FactoryBean.afterPropertiesSet(AbstractSessionFact oryBean.java:211)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.invokeInitMethods(Abstr actAutowireCapableBeanFactory.java:1288)

Is it possible to annotate class B alone without annotating Class A?

Hello,

not sure if you can actually do this, but do you really want to?
In my view, this approach could lead to code which is inconsistent and (very..) difficult to read, extend and maintain.
I'd personally bite the bullet and stick with only one mapping strategy.

Regards,
- Savvas Andreas

I guess it is possible.. I cant change all the hbm files to annotations.. Possibly could do slowly. When a class is not dependent on other class i am able to deploy and run both of them successfully.. If anyone know clarify please.