Re: Mapping rewrite

Ok.

Do you can't use the SecondPassCommand delegate ?

Mappings.AddSecondPass(SecondPassCommand)
Mappings.AddSecondPass(SecondPassCommand, bool)

2008/6/29 Ayende Rahien <[email protected]>:

> Sure. Sorry for that, I sometimes assume that everyone else knows whatever
> I know.
>
> This is related to partial domain models.
>
> http://www.ayende.com/Blog/archive/2008/01/12/Creating-Partial-Domain-Models.aspx
>
> Imagine this entity:
>
> public class Permission
> {
>     public Guid Id { get; set; }
>     public string Name { get; set; }
>     public IUser User { get; set; }
> }
>
> public class UsersGroup
> {
>     public Guid Id { get; set; }
>     public string Name { get; set; }
>     public ISet<User> Users { get; set; }
> }
>
> Now, what I want to do is to be able to decide, at configuration time, what
> is the concrete type that will be mapped to Permission.User.
> The idea is to allow packaging this as a compiled DLL and then allow
> different models to plug into this.
> I can do this manually easily enough, by setting the class="" attrib on the
> relevant mapping, but I want to be able to do this automatically and
> programatically.
>
> Here is a simple example of what I want:
>
> cfg = new Configuration().AddAssembly("MyDomain").AddAssemly("Security");
>
> RewriteReferences.From<IUser>().To<MyUser>();
>
> cfg.BuildSessionFactory();
>
> This will allow me to perform this modification without having to modify
> the mapping files.
> I could touch the NH mapping API directly.
>
>
> On Sun, Jun 29, 2008 at 5:45 PM, Fabio Maulo <[email protected]> wrote:
>
>> Oren, do you can explain the situation ? (the problem to solve... the
>> analysis... something in English...)
>> I can't understand where put a code-chunk if I don't understand the
>> target...
>>
>> Do you are trying to solve a generic association ?
>> Do you have an interface in the mapping but you want strongly-type it
>> before build-session-factory ?
>>
>> If this is the issue, would be better to end the study around
>> "mapping-source".
>>
>> BTW without an whole picture I have some problem to understand what you
>> need.
>>
>>
>> 2008/6/29 Ayende Rahien <[email protected]>:
>>
>>> Runtime in this context means _before_ we call BuildSessionFactory, but
>>> without touching the source XML files.
>>> Ideally, I want to be able to run this at some point at the config build
>>> lifetime:
>>>
>>> PersistentClass classMapping = cfg.GetClassMapping(userType);
>>> foreach (PersistentClass persistentClass in cfg.ClassMappings)
>>> {
>>>     //ignore non Rhino Security entities
>>>     if (persistentClass.MappedClass.Assembly != typeof(IUser).Assembly)
>>>         continue;
>>>
>>>     foreach (Property property in persistentClass.PropertyIterator)
>>>     {
>>>         ManyToOne manyToOne = property.Value as ManyToOne;
>>>         if (manyToOne == null || manyToOne.ReferencedEntityName !=
>>> typeof(IUser).FullName)
>>>             continue;
>>>         ManyToOne value = new ManyToOne(classMapping.Table);
>>>         value.ReferencedEntityName = userType.FullName;
>>>         foreach (ISelectable selectable in manyToOne.ColumnIterator)
>>>         {
>>>             Column col = selectable as Column;
>>>             if (col != null)
>>>             {
>>>                 value.AddColumn(col);
>>>             }
>>>         }
>>>         property.Value = value;
>>>
>>>         Collection collection = property.Value as Collection;
>>>         if (collection == null || collection.IsOneToMany ||
>>>             collection.GenericArguments.Length != 1 ||
>>>             collection.GenericArguments[0] != typeof(IUser))
>>>             continue;
>>>         IValue element = collection.Element;
>>>     }
>>>
>>>     foreach (ForeignKey key in persistentClass.Table.ForeignKeyIterator)
>>>     {
>>>         if (key.ReferencedEntityName != typeof(IUser).FullName)
>>>             continue;
>>>
>>>         key.ReferencedEntityName = userType.FullName;
>>>         key.ReferencedTable = classMapping.Table;
>>>     }
>>> }
>>>
>>> On Sun, Jun 29, 2008 at 5:09 PM, Fabio Maulo <[email protected]>
>>> wrote:
>>>
>>>> 2008/6/29 Ayende Rahien <[email protected]>:
>>>>
>>>>> I am _not_ interested in changing the XML. I am interested in
>>>>> selecting, at runtime, what is the class of the many-to-many association.
>>>>> There is a difference between them
>>>>>
>>>>>
>>>> At run-time ok; but when ?
>>>> You know, NH do the hard work of mapping at build-session-factory-time.
>>>> So far only using <any> you can have an association really resolved at
>>>> run-time.
>>>>
>>>> I need to understand what you are looking for to study the situation.
>>>> --
>>>> Fabio Maulo
>>>>
>>>> -------------------------------------------------------------------------
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>>>>
>>>
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>>
>>
>> --
>> Fabio Maulo
>> -------------------------------------------------------------------------
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>>
>
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>


-- 
Fabio Maulo

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