Spring ACL with UUID

Attempt 1

1. Change acl_object_identity.object_id_identity field to varchar.
2. Start application. Expecting error.
3. App started normally (before any page call)
4. Browse page, error come up. (Yes~!)
5. java.lang.String cannot be cast to java.math.BigInteger
6. Error at existing ACL entry.

Attempt 2

1. Try insert an object with UUID as PK.
2. And this is what I'm waiting for: java.lang.NumberFormatException: For input string: "741d25fe-f281-4747-95ef-229c1ba60000"

Attempt 3

1. Create a Java Project in eclipse
2. Import from spring-security-acl-3.0.5.RELEASE-sources.jar
3. Modify (trial-and-error) BasicLookupStrategy.java and ObjectIdentityImpl.java (mostly change long to String)
4. And it works, for now...