public SpeakerController(IConferenceLoader conferenceLoader, ISessionLoaderFactory sessionLoaderFactory, IUserProfileRepository userProfileRepository, IUserProfileFilterFactory userProfileFilterFactory)
        {
            if (conferenceLoader == null)
            {
                throw new ArgumentNullException("conferenceLoader");
            }

            if (sessionLoaderFactory == null)
            {
                throw new ArgumentNullException("sessionLoaderFactory");
            }

            if (userProfileRepository == null)
            {
                throw new ArgumentNullException("userProfileRepository");
            }

            if (userProfileFilterFactory == null)
            {
                throw new ArgumentNullException("userProfileFilterFactory");
            }

            this.conferenceLoader = conferenceLoader;
            this.sessionLoaderFactory = sessionLoaderFactory;
            this.userProfileRepository = userProfileRepository;
            this.userProfileFilterFactory = userProfileFilterFactory;
        }
        public SpeakerController(IConferenceLoader conferenceLoader, ISessionLoaderFactory sessionLoaderFactory, IUserProfileRepository userProfileRepository, IUserProfileFilterFactory userProfileFilterFactory)
        {
            if (conferenceLoader == null)
            {
                throw new ArgumentNullException("conferenceLoader");
            }

            if (sessionLoaderFactory == null)
            {
                throw new ArgumentNullException("sessionLoaderFactory");
            }

            if (userProfileRepository == null)
            {
                throw new ArgumentNullException("userProfileRepository");
            }

            if (userProfileFilterFactory == null)
            {
                throw new ArgumentNullException("userProfileFilterFactory");
            }

            this.conferenceLoader         = conferenceLoader;
            this.sessionLoaderFactory     = sessionLoaderFactory;
            this.userProfileRepository    = userProfileRepository;
            this.userProfileFilterFactory = userProfileFilterFactory;
        }