Here's an idea: Automatically expand all the tree until there are more than 1 items in the level
e.g. src->com->twitter->scalding->scala->test (in this example, these are all folders in hierarchy and they are the only one until the 'test' so expanding them automatically all the way through makes sense).
That's a good idea, those 'fake' Java directories can be displayed collapsed inline as a single node of the hierarchy, thus saving all their indent space.
e.g. src->com->twitter->scalding->scala->test (in this example, these are all folders in hierarchy and they are the only one until the 'test' so expanding them automatically all the way through makes sense).