Hi Jason,
I’m not sure whether you can do it with the xbmc binding, but you can use the http binding to send json commands to kodi.
I use the following json commands to first delete the current playlist, then load a smart playlist and finaly start playing it:
{"jsonrpc":"2.0","id":1,"method":"Playlist.Clear","params":{"playlistid":0}}
{"jsonrpc": "2.0", "method": "Playlist.Add","params":{"playlistid":0,"item":{"directory": "special://profile/playlists/music/NameOfSmartPlaylist.xsp", "media": "music"}},"id":1}
{"jsonrpc": "2.0", "method": "Player.Open", "params": { "item": { "playlistid": 0, "position": 0 } }, "id": 1}
However, I could not use those commands directly in openhab, I had to encode them before (for this I used http://www.freeformatter.com/url-encoder.html)
In Openhab, I then added the following lines in a rule:
// Delete old playlist
var String json = "%7B%22jsonrpc%22%3A%222.0%22%2C%22id%22%3A1%2C%22method%22%3A%22Playlist.Clear%22%2C%22params%22%3A%7B%22playlistid%22%3A0%7D%7D"
sendHttpGetRequest("http://192.168.178.26/jsonrpc?request=" + json)
// Load Playlist
var String s_KodiPlaylist = new String("NameOfSmartPlaylist")
json = "%7B%22jsonrpc%22%3A+%222.0%22%2C++%22method%22%3A+%22Playlist.Add%22%2C%22params%22%3A%7B%22playlistid%22%3A0%2C%22item%22%3A%7B%22directory%22%3A+%22special%3A%2F%2Fprofile%2Fplaylists%2Fmusic%2F" + s_KodiPlaylist + ".xsp%22%2C+%22media%22%3A+%22music%22%7D%7D%2C%22id%22%3A1%7D"
sendHttpGetRequest("http://192.168.178.26/jsonrpc?request=" + json)
// Start Playlist
json = "%7B%22jsonrpc%22%3A+%222.0%22%2C+%22method%22%3A+%22Player.Open%22%2C+%22params%22%3A+%7B+%22item%22%3A+%7B+%22playlistid%22%3A+0%2C+%22position%22%3A+0+%7D+%7D%2C+%22id%22%3A+1%7D"
sendHttpGetRequest("http://192.168.178.26/jsonrpc?request=" + json)
For me, it works fine.