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From Ole Ersoy <ole_er...@yahoo.com>
Subject Re: [Triplesec]Ecore Model
Date Tue, 30 Jan 2007 23:56:14 GMT
Alex,

With respect to the vision part,
it's doable, and almost done once the 
DAS is complete.  We just need a mapping of 
LDAP Schema to Ecore.  Then there's tons of graphical
capabilities that can be added on top from the EMFT,
etc. tooling and GMT tooling within Eclipse.  Thus
all these can be brought to the LDAP tool arsenal.


>>Ecore Model
Just XMI.  It describes the model.
That said Ecore can be used to model anything.
It models itself :-)
Everything can be mapped to Ecore.

>>What are SDO's?
I would think of SDO's as 
java beans that have a change
summary attached to them, so that
they can update a datasource
efficiently.

(1)
Really Short Answer: Yes

Longer: 
We can use an Ecore model 
to generate SDO's or just 
a model (Java beans effectively).
SDO generation is a switch you flip 
on the genmodel.

See the EMF Library Tutorial if you want to see how to
generate just a model:
http://dev.eclipse.org/viewcvs/indextools.cgi/org.eclipse.emf/doc/org.eclipse.emf.doc/tutorials/clibmod/clibmod.html

(2)
Short: Yes
Longer: Yes - But we should
read the LDAP Schema into its own
model (A model API for LDAP Schema).

Then traslate that model into an ecore 
model.  Then serialize to Ecore.  Then
generate the SDO's or EMF Model.

This is a standard process used by EMF.

It can read an XML Schema and translate it to ecore.
EMF has the XSD Infoset API for this.  The XSD Infoset

API corresponds to what we would use for the LDAP
Schema model.

Cheers,
- Ole


--- Alex Karasulu <akarasulu@apache.org> wrote:

> Ole,
> 
> I'm a bit behind the times with this stuff.  Could
> you give me a lay
> person's description of what this ecore model is? 
> Right now it sounds like
> meta data for generating SDOs that persistent data
> objects.  Please correct
> me if I am wrong.
> 
> Also I have some questions:
> 
> (1) Can we use an ecore model to generate SDOs for
> LDAP?
> 
> (2) Can we (in LDAP Studio an RCP application) read
> an LDAP schema and
> generate SDOs and/or simple beans for the
> objectClasses defined in that LDAP
> schema?
> 
> <note>
> There will be 2 forms of schema data:
>    (a) Schema data in the OpenLDAP format within an
> LDAP schema file
>          which does not include complex constructs
> like DITStructureRules,
>          DITContentRules, Syntaxes, MatchingRules
> and NameForms.  OpenLDAP
>          schema files usually just have objectClass
> and attributeType
> definitions.
>    (b) Schema data pulled from an LDAP server which
> includes all the schema
> types.
>          Why is this important?  Well these extra
> objects determine things
> like what
>          attributes can be used in a relative name
> for example and can
> effect the DSO
>          that needs to be generated.
> </note>
> 
> Why am I thinking about all this stuff?
> =======================
> 
> Many of us I am sure envision LDAP Studio to become
> more than just an LDAP
> browser with a pretty LDAP schema editor.  I see it
> as a platform to easy
> the development of LDAP driven applications and as
> an administrative tool to
> manage directories.  Something tells me this
> ecore/ems stuff is very
> advantageous to assist in making LS a sweet LDAP
> design tool.
> 
> I've had a personal pie in the sky dream WRT all
> this stuff.  I've always
> wanted a slick LDAP schema design tool that allows a
> user to graphically
> design LDAP schema like we do for RDBMS schema using
> UML modeling tools.  In
> addition to generating/pushing the schema directly
> into an LDAP server I'd
> like to see LS capable of generating code as these
> DSOs for example for the
> LDAP schema.
> 
> Can you see how incredible this would be for users
> to launch LS, design
> their schema and press a button to generate a
> library that contains all the
> DSOs they need to directory enable their
> applications?
> 
> (3) Can we achieve this vision with these eclipse
> modeling tools within LDAP
> Studio?
> 
> It seems to me you have the know how to determine
> first if this is at all
> possible.  Secondly, I am hoping if this is possible
> you can and others on
> this team can figure out a means for us to
> materialize the vision.
> 
> There is nothing like this as far as I know.  The
> closest thing I ever saw
> was a facility M$ added to visio after buying it to
> draw Active Directory
> diagrams.  However according to my knowledge (about
> 2 years ago) these
> diagrams could not generate schema or any kind of
> library for use in
> applications.
> 
> So the potential for a tool like this IMO is
> massive.  It could finally make
> developers comfortable enough to avoid forcing data
> into relational
> databases and instead put them where they belong in
> LDAP directories.
> 
> Regards,
> Alex
> 
> On 1/30/07, Ole Ersoy <ole_ersoy@yahoo.com> wrote:
> >
> > I checked in an emf ecore and genmodel
> > for the triplesec model concepts
> > we've been discussing:
> >
> >
> >
>
https://svn.apache.org/repos/asf/directory/sandbox/oersoy/triplesec/triplesec.model.ecore
> >
> > A series of eclipse plugins, containing the model,
> > adapters for communicating between swt and the
> model,
> > and an editor can be generated using generate all
> > on the genmodel root.
> >
> > SDOs can also be generated for this model.
> >
> > Here's a good SDO article for those interested.
> >
> >
> >
>
http://www-128.ibm.com/developerworks/websphere/techjournal/0510_peterson/0510_peterson.html
> >
> >
> >
> >
> >
> >
> >
>
____________________________________________________________________________________
> > Have a burning question?
> > Go to www.Answers.yahoo.com and get answers from
> real people who know.
> >
> 



 
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