Recursive Field Data

[blueprint]

Take the 'DocumentFolder' entity, if I wanted to display the heirarchical path as a separate field, how could I do this?

Consider the following made up folder tree:

Root Folder
Sub Folder 1
Sub Sub Folder 1
Sub Sub Sub Folder 1

I would like to be able to access a `path` field as a varchar containing the following:

Root Folder >> Sub Folder 1 >> Sub Sub Folder 1 >> Sub Sub Sub Folder 1

Can this be achieved easily, using existing formulae?

[blueprint]

I've done it in PHP by using a Hook, in the `beforeSave` function.