gistfile1.cs

    public class FluentNHibernateFacility : NHibernateFacility
    {
        protected override void Init()
        {
            var connectionString = FacilityConfig.Attributes["connection_string"];

            if (string.IsNullOrEmpty(connectionString))
                throw new ConfigurationErrorsException("No connection string has been supplied. Please supply a connection string.");

            var factoryConfig = BuildFactory(connectionString);
            RegisterNewConfiguration(factoryConfig);

            base.Init();
        }

        private IConfiguration BuildFactory(string connectionString)
        {
            SetConfigurationBuilder(typeof(FluentNHibernateConfigurationBuilder));
            var factoryConfig = BuildFactoryCore(connectionString);

            return factoryConfig;
        }

        private void SetConfigurationBuilder(Type configurationBuilderType)
        {
            var configurationBuilder = FacilityConfig.Attributes["configurationBuilder"];

            if (string.IsNullOrEmpty(configurationBuilder))
                FacilityConfig.Attributes.Add("configurationBuilder", configurationBuilderType.AssemblyQualifiedName);
        }

        protected virtual IConfiguration BuildFactoryCore(string connectionString)
        {
            var factoryConfig = new MutableConfiguration("factory");
            factoryConfig.Attributes.Add("id", "nhibernate.factory");

            SetSettings(factoryConfig, connectionString);

            return factoryConfig;
        }

        private static void SetSettings(IConfiguration configuration, string connectionString)
        {
            var settingsConfig = new MutableConfiguration("settings");
            RegisterDatabase(settingsConfig, connectionString);
            configuration.Children.Add(settingsConfig);
        }

        private static void RegisterDatabase(IConfiguration configuration, string connectionString)
        {
            AddChildToConfiguration(configuration, "connection.provider", "NHibernate.Connection.DriverConnectionProvider");
            RegisterDatabaseDetails(configuration, "NHibernate.Driver.SqlClientDriver", "NHibernate.Dialect.MsSql2005Dialect", connectionString);
            AddChildToConfiguration(configuration, "default_schema", "dbo");
            AddChildToConfiguration(configuration, "show_sql", "false");
            AddChildToConfiguration(configuration, "proxyfactory.factory_class", "NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle");
        }

        private static void RegisterDatabaseDetails(IConfiguration configuration, string driver, string dialect, string connectionString)
        {
            AddChildToConfiguration(configuration, "connection.driver_class", driver);
            AddChildToConfiguration(configuration, "dialect", dialect);
            AddChildToConfiguration(configuration, "connection.connection_string", connectionString);
        }

        private static void AddChildToConfiguration(IConfiguration configuration, string key, string value)
        {
            var item = new MutableConfiguration("item", value);
            item.Attribute("key", key);
            configuration.Children.Add(item);
        }

        private void RegisterNewConfiguration(IConfiguration factoryConfig)
        {
            FacilityConfig.Children.Add(factoryConfig);
        }
    }