Add stub for JPAMapAccessVisitor
Add tests
Update tests
Use left join
Unify JPAMapAccessVisitor and JPAListAccessVisitor
Replace proprietary annotation
Simplify map expressions
Revert PathMetadataFactory change
Fix tests
Improve null handling
Add more tests for literal serialization
Improve tests
Improve batch handling
Call addBatch only if in batch mode
Skip UUID test for literal usage
Fix behaviour on Boolean value
Improve literal serialization
Merge pull request #1081 from querydsl/i1079

Improve null handling
Fix parameter
Add cast
Fix imports