tlaukkan/vaadin-lazyquerycontainer — pull request #45 by raehalme (2013-05-05 10:46:45+00:00)
Title: nextItemId/prevItemId should return null instead of throwing IndexOutOfBoundsException

According to com.vaadin.data.Container.Ordered methods nextItemId and prevItemId should return null values when the given item is the last/first or not found.

This pull request contains a modification to LazyQueryContainer to follow the definition. In addition two tests were added to verify the functionality.