public interface DataService public UserInfo getUserInfo String login

public interface DataService { 
    public UserInfo getUserInfo(String login, String password); 
    public DimensionTable getFact(String address, String code, List<String> dimensions, List<List<String>> filter);
 
    public DimensionTable getCatalog(String address, String code, List<String> dimensions); 
    public DimensionTable getEmptyTable (); 
    public DimensionTable getRequests(); 
}