Getting JSON data from REST-based interface

Hi

I really want to know how to do it: I need to get some data from discogs.com API (it's REST-based interface) and then map this data into objects (i. e. jackson json processor). My question is: how to get that data from remote source as discogs.com API? I know that I need before that some Oauth library to authentication.

I will be grateful for any help :)

So, the data you need isn't publicly available? You must be logged in to access it?

Yes, I must use OAuth 1.0a to log in.