When using getPageParameters(), I used to have some troubles because
forgetting to call page super(params). As a result, getPageParameters()
returns null. This problem also occur when working with non bookmarkable
page. My suggestion is to take advantage of Null Object Pattern
<http://en.wikipedia.org/wiki/Null_Object_pattern> and
if the pageParameters object is null to return PageParameters.NULL (empty)
instance. This way, the client of the code wouldn't have to worry about NPE
check. Any thoughts?
Thank you!
Alex
