ObjectSpaces: The Power of the Dot

re: ObjectSpaces: The Power of the Dot

Jeff — Wed, 18 Feb 2004 20:49:00 GMT

There is a lot of neat stuff in Whidbey, but honestly I can't say I've been more excited about anything else. ObjectSpaces solve so many problems I've had over the last two years or so, and the RTM can't come soon enough!

ObjectSpaces - The Move from XPath to OPath

Christian Nagel's OneNotes — Thu, 19 Feb 2004 00:06:00 GMT

Udi Dahan - The Software Simplist — Thu, 19 Feb 2004 00:33:00 GMT

From <a href="http://weblogs.asp.net/mattwar/archive/2004/02/18/75770.aspx">"ObjectSpaces: The Power of the Dot"</a>:

"They only wanted their 'application programmers' messing with their objects, and not to be bothered with details about how the information is stored or expressed in other forms. They wanted their programmers concerned with the business program and the code they were writing."

I suggest reading the entire post - but this really sums up why I think that datareaders and datasets shouldn't be let out of captivity.

Objectspaces vs Data*

Udi Dahan - The Software Simplist — Thu, 19 Feb 2004 00:38:00 GMT

Objectspaces vs Data*

Udi Dahan - The Software Simplist — Thu, 19 Feb 2004 00:40:00 GMT

re: ObjectSpaces: The Power of the Dot

RebelGeekz — Wed, 18 Feb 2004 21:43:00 GMT

Changing one char for another can make such a great difference.

Welcome to software ergonomics.

Ergonomics: an applied science concerned with designing and arranging things people use so that the people and things interact most efficiently and safely -- called also human engineering.

Software Ergonomics

RebelGeekz' Blog — Thu, 19 Feb 2004 01:21:00 GMT

re: ObjectSpaces: The Power of the Dot

Jason Mauss — Wed, 18 Feb 2004 22:42:00 GMT

Matt (or anyone) - can you point me towards a primer on ObjectSpaces and what they're all about? I'd like to learn more.

re: ObjectSpaces: The Power of the Dot

Paul Wilson — Thu, 19 Feb 2004 01:44:00 GMT

Hi Matt:

I agree the dot is better than the slash, but I don't buy that its good enough. Why can't we have some type of strongly typed query API that's fully supported by intellisense? Instead of GetObject("MyObject.MyProperty = 1"), why can't I have GetObject(MyObject.MyProperty, Operator.Equals, 1), where intellisense helps me with MyProperty? I'm sure its not trivial, but surely its doable since the ASP.NET team does some on the fly strongly typed stuff that works with intellisense for MasterPages. And surely the actual customers you speak of would prefer working with objects and intellisense instead of learning even the not-so-hard OPath syntax that is still prone to errors.

Thanks, Paul Wilson

re: ObjectSpaces: The Power of the Dot

Matt — Thu, 19 Feb 2004 01:49:00 GMT

You are correct. Strongly typed queries embedded in a host language beat queries in a string any day of the week. This is exactly why I spent the last 2 years working on the X#/Xen research project. One day you may just get your wish. ;-)

re: ObjectSpaces: The Power of the Dot

Matt — Thu, 19 Feb 2004 02:03:00 GMT

If you want to find out about ObjectSpaces you can check out the newsgroup: microsoft.public.objectspaces

You can also check out:
http://longhorn.msdn.microsoft.com/lhsdk/ref/system.data.objectspaces.aspx

Some independent sites too:
http://my.execpc.com/~gopalan/dotnet/object_spaces/object_spaces.html

http://www.langreiter.com/space/ObjectSpaces

Also, check out Andrew's blog. He talks covers a lot about ObjectSpaces.

http://weblogs.asp.net/aconrad/category/2231.aspx

re: ObjectSpaces: The Power of the Dot

Paul Wilson — Thu, 19 Feb 2004 02:36:00 GMT

I've got an introduction to ObjectSpaces article at: http://authors.aspalliance.com/paulwilson/articles/?id=21.

re: ObjectSpaces: The Power of the Dot

Jason Mauss — Thu, 19 Feb 2004 03:42:00 GMT

Thanks Matt & Paul - I'll check those out.

Objectspaces?

Peter Marshall — Thu, 19 Feb 2004 11:43:00 GMT

Objectspaces?

ObjectSpaces and usability

stevencl's WebLog — Mon, 01 Mar 2004 21:03:00 GMT

The Wayward WebLog

Bryant Likes's Blog — Fri, 05 Mar 2004 20:19:00 GMT

Configure This

Bryant Likes's Blog — Tue, 09 Mar 2004 03:15:00 GMT

Configure This

Bryant Likes's Blog — Tue, 09 Mar 2004 20:31:00 GMT

ObjectSpaces: Spanning the Matrix

The Wayward WebLog — Tue, 16 Mar 2004 09:21:00 GMT

re: ObjectSpaces: The Power of the Dot

David Goldstein — Wed, 31 Mar 2004 03:26:00 GMT

Quoth Paul:
"Instead of GetObject("MyObject.MyProperty = 1"), why can't I have GetObject(MyObject.MyProperty, Operator.Equals, 1)"

That's why I keep wishing for C# (sure VB.NET too) to allow syntax to reference a property or field, sorta like this:
typeof(MyClass.MyProperty)
or even a java like syntax (eek!)
MyClass.class
MyClass.MyProperty.member

Then you can directly reference your member (boy that sounds, er, obscene....) while getting compile-time checking.

HEY have you considered allowing precompiled OPath queries, kind of like regex?
private static readonly QUERY_CustomersEtc =
new OPathQuery("MyClass.MyProperty = 1");
but OOPS oh yeah where's the context... *sigh*

Maybe the key then is to be able to declare queries in your mapping file.

<query id="CustomersEtc">
<where syntax="opath">MyCustomer.MyProperty = 1</where>
</query>

dunno.. sorry I haven't studied OPath enough yet to give a good example.

but here the very cool (IMHO) thing is that you _administratively_ declare a query... and what relationships to traverse. the uncoll part is that the input parameters and output columns still end up having loosely coupled dependencies with the code that uses it...

The Wayward WebLog

Bryant Likes's Blog — Fri, 14 May 2004 19:14:00 GMT

ObjectSpaces - The Move from XPath to OPath

Christian Nagel's OneNotes — Fri, 14 Jan 2005 10:58:00 GMT

(Deprecated) OPath Documentation

Persient .NET — Mon, 23 May 2005 04:35:45 GMT

Users of the Wilson O/R Mapper sometimes ask for some documentation about OPath in their user forum, since the mapper supports a query language similar (or identical?) to OPath.

Here you are---ObjectSpaces articles that might be useful when working with Wilson O/R Mapper (a design goal of which seems to be to mimic the ObjectSpaces API design), an incomplete list in no particular order.

(Deprecated) OPath Documentation

Persient .NET — Mon, 23 May 2005 05:02:19 GMT

The .NET Language Integrated Query Framework

Erwyn van der Meer — Sun, 17 Jul 2005 21:06:00 GMT

Microsoft's Luca Bolognese has a nice overview of PDC sessions related to the .NET Language Integrated...

The .NET Language Integrated Query Framework

Erwyn van der Meer — Sun, 17 Jul 2005 22:41:30 GMT

Microsoft's Luca Bolognese has a nice overview of PDC sessions related to the .NET Language Integrated...