I have an entity class which contains field:This entity object was loaded in DAO class and session was closed. How to initialize now this LAZY field?
Only with usage of Query or Criteria for this entity, or there is other possibility to "EAGER" that lazy object, something like: session.[someMethod](department)?
I didn't find something like that in API, but I want to write some universal method for that in base HibernateDao class and inherit it in all DAO classes, something like that: Is there any thoughts and ideas, how to do that?

org.hibernate.Hibernate.initialize() can take either a proxied entity or collection and initialize it.

But in other session it doesn't work.

You'll need to attach it to an open session first. Use session.lock() (if you have not made any changes that needs to be persisted) or session.update() if there are changes.

It works good with object. Thanks.

But how to do the same thing with collection?

I have no such case myself, but try attaching the owner of the collection to an open session and then use Hibernate.initialize() with the collection.

When I use session.lock(object, LockMode.NONE) to the owner, all lazy collection of this object for some strange reasons initialized without Hibernate.initialize() usage. But I don't need all of them.