I've been working on a Django project using South to track and manage database schema changes. I'm starting a new Java project using Google Web Toolkit and wonder if there is an equivalent tool. For those who don't know, here's what South does:

• Automatically recognize changes to my Python database models (add/delete columns, tables etc.)
• Automatically create SQL statements to apply those changes to my database
• Track the applied schema migrations and apply them in order
• Allow data migrations using Python code. For example, splitting a name field into a first-name and last-name field using the Python split() function

I haven't decided on my Java ORM yet, but Hibernate looks like the most popular. For me, the ability to easily make database schema changes will be an important factor.