Fluent NHibernate将IList <point>映射为单列</point>的值

时间:2010-05-02 16:41:42

标签: c# .net nhibernate fluent-nhibernate nhibernate-mapping

我有这堂课:

public class MyEntity
{
    public virtual int Id { get; set; }
    public virtual IList<Point> Vectors { get; set; }
}

如何将Fluent NHibernate中的Vectors映射到单个列(作为值)?我在想这个:

public class Vectors : ISerializable
{
    public IList<Point> Vectors { get; set; }

    /* Here goes ISerializable implementation */
}

public class MyEntity
{
    public virtual int Id { get; set; }
    public virtual Vectors Vectors { get; set; }
}

是否可以像这样映射Vectors,希望Fluent NHibernate将Vectors类初始化为标准的ISerializable?

或者我如何将IList<Point>映射到单个列?我想我必须自己编写序列化/反序列化例程,这不是问题,我只需要告诉FNH使用这些例程。

我想我应该使用IUserTypeICompositeUserType,但我不知道如何实施它们,以及如何告诉FNH合作。

1 个答案:

答案 0 :(得分:4)

找到答案。 : - )

标题为UserTypeConvention<T>
http://wiki.fluentnhibernate.org/Available_conventions
用于自定义类型转换。

这是用于实现自定义类型转换器:
http://intellect.dk/post/Implementing-custom-types-in-nHibernate.aspx

我发现的其他相关链接:
http://www.lostechies.com/blogs/rhouston/archive/2008/03/23/mapping-strings-to-booleans-using-nhibernate-s-iusertype.aspx
http://www.martinwilley.com/net/code/nhibernate/usertype.html
http://geekswithblogs.net/opiesblog/archive/2006/08/13/87880.aspx
http://kozmic.pl/archive/2009/10/12/mapping-different-types-with-nhibernate-iusertype.aspx
http://blogs.msdn.com/howard_dierking/archive/2007/04/23/nhibernate-custom-mapping-types.aspx

UserTypeConvention<T>用法:
http://jagregory.com/writings/fluent-nhibernate-auto-mapping-type-conventions/

最后一个链接中最重要的代码是:

public class ReplenishmentDayTypeConvention : ITypeConvention
{
  public bool CanHandle(Type type)
  {
    return type == typeof(ReplenishmentDay);
  }

  public void AlterMap(IProperty propertyMapping)
  {
    propertyMapping
      .CustomTypeIs<ReplenishmentDayUserType>()
      .TheColumnNameIs("RepOn");
  }
}

其中ReplenishmentDayUserTypeIUserType - 派生类和ReplenishmentDay是类,应使用您的用户类型转换器进行转换。

而且:

autoMappings
  .WithConvention(convention =>
  {
    convention.AddTypeConvention(new ReplenishmentDayTypeConvention());
    // other conventions
  });