BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  LINQ, .NET, and the future of OPF/ORM approaches          BorlandTalk.com Forum Index -> Delphi OO design View previous topic :: View next topic   Author Message Bob Dawson Guest Posted: Mon Apr 02, 2007 6:25 am    Post subject: LINQ, .NET, and the future of OPF/ORM approaches This is not so much Delphi-relevant as an interesting comment on OO layered design philosphy: From the primary author of the Gentle.NET persistence framework: "I have also been riddled with doubt as to the future of writing an ORM. While I still find Gentle incredibly useful in my own projects, there is not much future in it (with C# 3.0 and LINQ scheduled for Q2 2007)." source: http://www.mertner.com/confluence/display/Community/Version+2.0?focusedCommentId=1730#comment-1730 (Gentle is hosted at http://sourceforge.net/projects/gopf) bobD Back to top Joanna Carter [TeamB] Guest Posted: Mon Apr 02, 2007 4:08 pm    Post subject: Re: LINQ, .NET, and the future of OPF/ORM approaches Bob Dawson a écrit : Quote: This is not so much Delphi-relevant as an interesting comment on OO layered design philosphy: As you well know Bob, until the PTB give us a proper OO design group, this is the true home of real OO discussion :-) Quote: From the primary author of the Gentle.NET persistence framework: "I have also been riddled with doubt as to the future of writing an ORM. While I still find Gentle incredibly useful in my own projects, there is not much future in it (with C# 3.0 and LINQ scheduled for Q2 2007)." source: http://www.mertner.com/confluence/display/Community/Version+2.0?focusedCommentId=1730#comment-1730 (Gentle is hosted at http://sourceforge.net/projects/gopf) Personally, I woould still write an ORM, it's just that it would no longer have to build SQL but, instead, translate a Linq (object) expression tree into a database DLing expression tree. The class-table mappings would still be relevant for resolving impedance mismatch. Joanna -- Joanna Carter [TeamB] Consultant Software Engineer Back to top Joanna Carter [TeamB] Guest Posted: Mon Apr 02, 2007 4:13 pm    Post subject: Re: LINQ, .NET, and the future of OPF/ORM approaches Joanna Carter [TeamB] a écrit : Quote: Personally, I woould still write an ORM, it's just that it would no longer have to build SQL but, instead, translate a Linq (object) expression tree into a database DLing expression tree. The class-table mappings would still be relevant for resolving impedance mismatch. BTW, please excuse the typos, I now use a Macbook Pro and am still getting used to the keyboard layout. Now to install Parallels and an XP VM :-) Joanna -- Joanna Carter [TeamB] Consultant Software Engineer Back to top Anders Isaksson Guest Posted: Mon Apr 02, 2007 4:40 pm    Post subject: Re: LINQ, .NET, and the future of OPF/ORM approaches Joanna Carter [TeamB] wrote: Quote: Personally, I woould ... Who said "You can't get too much oo" ? :-) -- Anders Isaksson, Sweden BlockCAD: http://web.telia.com/~u16122508/proglego.htm Gallery: http://web.telia.com/~u16122508/gallery/index.htm Back to top danny heijl Guest Posted: Mon Apr 02, 2007 5:13 pm    Post subject: Re: LINQ, .NET, and the future of OPF/ORM approaches Bob Dawson schreef: Quote: From the primary author of the Gentle.NET persistence framework: "I have also been riddled with doubt as to the future of writing an ORM. While I still find Gentle incredibly useful in my own projects, there is not much future in it (with C# 3.0 and LINQ scheduled for Q2 2007)." The NHibernate folks see it differently and are already talking about the possibilities of integrating NHibernate with LINQ (NHLinq): http://forum.hibernate.org/viewtopic.php?t=958233&sid=ddcd1bbfa598603859b4cdbc1e708c9a NHibernate is great by the way, especially when used with MyGeneration (we're using partial classes and generics when generating). Danny --- Back to top Peter Morris [Droopy eyes Guest Posted: Mon Apr 02, 2007 8:40 pm    Post subject: Re: LINQ, .NET, and the future of OPF/ORM approaches I'll continue to use ECO. Fetching objects from the DB is only a small part of what it does,for starters... State machines In memory transactions OCL derived properties/associations with caching Mapping a model to a different DB structure using XML Multi-user change notification Lazy fetching of object data Delayed fetching for specified properties I expect it will be possible to implement some kind of LINQ support for ECO too, so I doubt I'll have to do without LINQ forever (or at all). -- Pete Blessed are the geek, for they shall public class GeekEarth : Earth {} ==== Audio compression components, DIB graphics controls, ECO extensions, FastStrings : http://www.droopyeyes.com My blog : http://mrpmorris.blogspot.com Back to top        BorlandTalk.com Forum Index -> Delphi OO design All times are GMT Page 1 of 1 Powered by phpBB © 2001, 2006 phpBB Group .