如何将整个映射设置为只在NHibernate 3.2中按代码映射？

public class UserMapping : ClassMapping<User>
{
    public UserMapping()
    {
        // 设置表名
        Table("Users");

        // 设置主键
        Id(x => x.Id, map =>
        {
            map.Column("Id");
            map.Generator(Generators.Identity);
        });

        // 设置其他属性
        Property(x => x.Name, map => map.Column("Name"));
        Property(x => x.Email, map => map.Column("Email"));
        // ...
    }
}

public class CustomAutomappingConfiguration : DefaultAutomappingConfiguration
{
    public override bool ShouldMap(Type type)
    {
        // 返回 false 以禁用自动映射
        return false;
    }
}

var configuration = new Configuration();
configuration.DataBaseIntegration(db =>
{
    db.ConnectionString = "your_connection_string";
    db.Dialect<MsSql2012Dialect>();
});

// 添加映射类
configuration.AddMapping(new UserMapping());
// ... 添加其他映射类

// 使用自定义自动映射配置
configuration.SetNamingStrategy(new DefaultComponentSafeNamingStrategy());
configuration.AutoMappingConfiguration<CustomAutomappingConfiguration>();

var sessionFactory = configuration.BuildSessionFactory();