If the AliasToBeanResultTransformer can't find both a getter and a setter for a particular property on an object, it just assumes the object is a Map (without checking) and ends up throwing a confusing ClassCastException. "Foo cannot be cast to java.util.Map." (Yes, I knew that!) See this Stack Overflow question.

Expected Result:

Some exception is thrown that leads the user to the problem.

Actual Result:

A ClassCastException is thrown.

Pull request forthcoming...