What does Hibernate.initialize do?

Question

What does Hibernate.initialize do?
Usually referred documentation talk only about

Hibernate.initialize(entity.lazyCollection)

Is ther

Answer 1

Shortly Hibernate.initialize() creates another query to fetch object in persistence context. When object is loaded eagerly JPA makes only one query to fetch object. So another difference is number calls to server

In addition : 1. If object is null Hibernate.initialize() throws exception 2. Good source for how to initialize lazy associations http://www.thoughts-on-java.org/5-ways-to-initialize-lazy-relations-and-when-to-use-them/