I am trying to use SWIG in order to use the Spotify API (libspotify) for Android: https://developer.spotify.com/technologies/libspotify/

I am having trouble defining the SWIG interface file to be able to successfully call the following native C function:

sp_error sp_session_create(const sp_session_config * config, sp_session ** sess);

Which in C would be called like this:

//config struct defined previously
sp_session *sess;
sp_session_create(&config, &sess);

But in Java I would need to call it like this:

//config object defined previously
sp_session javaSess = new sp_session();
sp_session_create(config, javaSess);

sp_session is an opaque struct and is only defined in libspotify's API.h file as:

typedef struct sp_session sp_session;

I'm expecting the libspotify library to create it and give me a reference to it. The only thing I need that reference for then is to pass to other functions in the API.

I believe the answer lies within the SWIG interface and typemaps, but I have been unsuccessful in trying to apply the examples I found in the documentation: http://www.swig.org/Doc2.0/SWIGDocumentation.html#Java_struct_pointer_pointer `http://www.swig.org/Doc2.0/SWIGDocumentation.html#Java_using_typemaps_return_arguments

Help!