The public API of Querydsl should be more limited then it is currently and internal functionality should be better hidden.

The public runtime API could be something like

• query classes: JPAQuery, SQLQuery etc
• projections: Projections.*
• dynamic expression creation: BooleanBuilder, PathBuilder, Expressions.*
• query factory classes

The following classes should be better hidden

• projection types: QBean, QTuple, ConstructorExpression
• specialized operation types: SimpleOperation etc (at least construction)
• specialized path types: SimplePath etc (at least construction)