public class UserTopArtistsClient extends AbstractWSGetClient {
public static final String METHOD = "user.gettopartists";
public WSResponse getUserTopArtists(LastFmUser user, Period period) throws ApplicationException {
WebserviceInvocation webserviceInvocation =
new WebserviceInvocation(USER_GET_TOP_ARTISTS, user, period.getDays());
List<NameValuePair> params = getDefaultParameterList();
params.add(new BasicNameValuePair(PARAM_METHOD, METHOD));
params.add(new BasicNameValuePair(PARAM_USER, user.getLastFmUsername()));
params.add(new BasicNameValuePair(PARAM_PERIOD, period.getDescription()));