SOLID DDD ORM request (to use clean entities and repositories) for .NET

Question

Is there a ORM that would

leave my entities classes clean, withouth any attributes for properties and classes
would not be ActiveRecord pattern so it should not have entity.Save/Delete etc.

optional: able to execute stored procedures and parse the result into entityies

Are you targeting any specific platform/language/framework? E.g. .NET, Java? — o.k.w, Dec 31 '09 at 07:11

Jeremy McGee · Accepted Answer · 2009-12-31T12:55:52.363

4

Sounds like NHibernate is what you need. This uses a mapping file (in XML) to map the properties of classes to the database. Entities are managed through a SessionManager interface.

Documentation is here.

A mapping file can also map from a stored procedure to your persistent objects. Details here.

edited Dec 31 '09 at 12:55

answered Dec 31 '09 at 07:30

Jeremy McGee

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Those links are to an older (1.2) version of NHibernate. More recent documentation is here: http://www.nhforge.org/doc/nh/en/index.html – Michael Maddox Dec 31 '09 at 12:32
Mark - I agree about "wait and see" regarding the Entity Framework. – Jeremy McGee Dec 31 '09 at 17:58
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Agree. Mapping can however also be done with attributes (which isn't POCO and not what the asker wanted), and with C# (http://fluentnhibernate.org/). – Martin R-L Jan 04 '10 at 00:03

score 3 · Answer 2 · answered Dec 31 '09 at 09:36

What you are looking for is commonly referred to as Persistence Ignorance. It seems that the preferred framework for that is NHibernate, so I second Jeremy McGee's answer.

For completeness' sake I'd like to point out Microsoft's Entity Framework will get Persistence Ignorance in the next version (.NET 4) - they call it POCO support. Whether it will actually turn out to be any good remains to be seen...

SOLID DDD ORM request (to use clean entities and repositories) for .NET

2 Answers2