Custom classloader for Hibernate-mapping

Question

Does anyone know a way to intercept the call Hibernate will make to instantiate a class indicated in a .hbm.xml file? I need a way to use a custom ClassLoader to provide an instance. I don't want to change class loading for Hibernate in general, just the instantiate of the mapped "POJO" class.

<hibernate-mapping>
    <class name="com.foo.Bar" table="Bar">

In the example code above, when Hibernate wants to instantiate Bar I need to provide that class with custom code instead of relying on the default class loading behavior.

Thanks in advance for any insight,
saethi

Answer 1

You can customize the way Hibernate creates entities with a custom Tuplizer. See the hibernate documentation, chapter 4.5.

You can extend PojoEntityTuplizer, and override the buildInstantiator(PersistentClass persistentClass) method by returning an Instantiator instance which builds entities however you prefer.