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Resolve proxy URI always file URI? [message #427537]

Fri, 20 February 2009 14:31

Christophe Bouhier

Messages: 937
Registered: July 2009

Senior Member

I am pushing my luck for today with one more questions.
I have the following situation;

Model A is stored in a DB with Teneo/Hibernate. I use an extension
called .modelA to trigger an Hibernate Resource, with
HibernateResourceFactory.

Model B is stored in a file. B has references to various elements in
model A.

I create a new Model B, and use "load resource" to load an existing
Model A.

I set references from B to A, and the URI when serialized in B looks
like this:

<networkNodes xmi:type="networkplan:NetworkNode"
xmi:id="_usPVUP7NEd2l0_eU-RB3cA">
<node xmi:type="networkdata:Node" href="sample.modelA#Node|id=9"/>
</networkNodes>

So the URI for the Hibernate resource is "sample.modelA#Node|id=9"

Now when I re-open my Model B, and automatic proxy resolv kicks in,
the URI "sample.modelA" is interpreted as "file://user home
path/sample.modelA. It opens the correct resource, but the URI is
converted in a file URI, which is not what I expected.

So:
- Would it perhaps make more sense to use a URI in the form as described
on the elver site?

String uriStr = "hibernate://?" + HibernateResource.DS_NAME_PARAM + "=MySF";

If I do so, what do I put in the extension parser?

<extension point="org.eclipse.emf.ecore.extension_parser">
<parser
type="modelA"

class=" org.eclipse.emf.teneo.hibernate.resource.HibernateResourceFa ctory "/>
</extension>

Any advise is most welcome.

Thanks Christophe

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Re: Resolve proxy URI always file URI? [message #427538 is a reply to message #427537]

Fri, 20 February 2009 14:48

Ed Merks

Messages: 33142
Registered: July 2009

Senior Member

This is a multi-part message in MIME format.
--------------020304070603030505080708
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Christophe,

Comments below.

Christophe Bouhier wrote:
> I am pushing my luck for today with one more questions.
You're in luck.
> I have the following situation;
>
> Model A is stored in a DB with Teneo/Hibernate. I use an extension
> called .modelA to trigger an Hibernate Resource, with
> HibernateResourceFactory.
>
>
> Model B is stored in a file. B has references to various elements in
> model A.
>
> I create a new Model B, and use "load resource" to load an existing
> Model A.
>
> I set references from B to A, and the URI when serialized in B looks
> like this:
>
>
> <networkNodes xmi:type="networkplan:NetworkNode"
> xmi:id="_usPVUP7NEd2l0_eU-RB3cA">
> <node xmi:type="networkdata:Node"
> href="sample.modelA#Node|id=9"/>
> </networkNodes>
>
>
> So the URI for the Hibernate resource is "sample.modelA#Node|id=9"
>
> Now when I re-open my Model B, and automatic proxy resolv kicks in,
> the URI "sample.modelA" is interpreted as "file://user home
> path/sample.modelA. It opens the correct resource, but the URI is
> converted in a file URI, which is not what I expected.
This is why I always say always use absolute URIs for resources.

..An absolute URI starts with a scheme
--Always uses absolute URIs to identify resources!
--Relative URIs are useful within resources for referring to other
resources within the same authority
..This supports moving groups of related resources
--Examples of relative URIs
.. #id
.. ../directory/file.extension
.. file.extension

..Deresolving an absolute URI against a base absolute URI yields the URI
relative to that base
-- E.g., deresolving platform:/resource/a/foo.html against
platform:/resource/b/bar.html yields ../a/foo.html
..Resolving a relative URI against a base absolute URI yields the
absolute URI relative to that base
E.g., resolving ../a/foo.html against platform:/resource/b/bar.html
>
> So:
> - Would it perhaps make more sense to use a URI in the form as
> described on the elver site?
>
> String uriStr = "hibernate://?" + HibernateResource.DS_NAME_PARAM +
> "=MySF";
>
>
> If I do so, what do I put in the extension parser?
>
> <extension point="org.eclipse.emf.ecore.extension_parser">
> <parser
> type="modelA"
>
> class=" org.eclipse.emf.teneo.hibernate.resource.HibernateResourceFa ctory "/>
>
> </extension>
>
It sounds like you already have that. There's also a protocol_parser
you can register against hibernate I suppose...
>
>
> Any advise is most welcome.
>
> Thanks Christophe
>
>
>
>
>

--------------020304070603030505080708
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Christophe, 
 
Comments below. 
 
Christophe Bouhier wrote:
<blockquote cite="mid:gnmes3$88d$1@build.eclipse.org" type="cite">I am
pushing my luck for today with one more questions.
 
</blockquote>
You're in luck. 
<blockquote cite="mid:gnmes3$88d$1@build.eclipse.org" type="cite">I
have the following situation;
 
 
Model A is stored in a DB with Teneo/Hibernate. I use an extension
called .modelA to trigger an Hibernate Resource, with
HibernateResourceFactory.
 
 
 
Model B is stored in a file. B has references to various elements in
model A.
 
 
I create a new Model B, and use "load resource" to load an existing
Model A.
 
 
I set references from B to A, and the URI when serialized in B looks
like this:
 
 
 
<networkNodes xmi:type="networkplan:NetworkNode"
xmi:id="_usPVUP7NEd2l0_eU-RB3cA">
 
         <node xmi:type="networkdata:Node"
href="sample.modelA#Node|id=9"/>
 
      </networkNodes>
 
 
 
So the URI for the Hibernate resource is "sample.modelA#Node|id=9"
 
 
Now when I re-open my Model B, and automatic proxy resolv kicks in,
 
the URI "sample.modelA" is interpreted as "<a class="moz-txt-link-freetext" href="file://user">file://user</a> home
path/sample.modelA. It opens the correct resource, but the URI is
converted in a file URI, which is not what I expected.
 
</blockquote>
This is why I always say always use absolute URIs for resources.  
 
<div
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.38in; text-indent: -0.38in;">•An absolute URI starts
with a scheme</div>
<div class="O1"
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.81in; text-indent: -0.31in;">–Always uses absolute
URIs to identify resources!</div>
<div class="O1"
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.81in; text-indent: -0.31in;">–Relative URIs are useful
within resources for referring to
other resources within the same authority</div>
<div class="O2"
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.25in; text-indent: -0.25in;">•This supports moving
groups of related resources</div>
<div class="O1"
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.81in; text-indent: -0.31in;">–Examples of relative URIs</div>
<div class="O2"
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.25in; text-indent: -0.25in;">• #id</div>
<div class="O2"
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.25in; text-indent: -0.25in;">• ../directory/file.extension
</div>
<div class="O2"
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.25in; text-indent: -0.25in;">• file.extension
</div>
 
 
<div
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.38in; text-indent: -0.38in;">•Deresolving an absolute URI against
a
base absolute URI yields the URI relative to that base</div>
<div class="O1"
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.81in; text-indent: -0.31in;">– E.g., deresolving platform:/resource/a/foo.html
against platform:/resource/b/bar.html
yields ../a/foo.html
</div>
<div
style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.38in; text-indent: -0.38in;">•Resolving a relative URI
against a base absolute URI yields the
absolute URI relative to that base</div>
E.g., resolving ../a/foo.html
against platform:/resource/b/bar.html
 
<blockquote cite="mid:gnmes3$88d$1@build.eclipse.org" type="cite"> 
So:
 
- Would it perhaps make more sense to use a URI in the form as
described on the elver site?
 
 
String uriStr = "hibernate://?" + HibernateResource.DS_NAME_PARAM +
"=MySF";
 
 
 
If I do so, what do I put in the extension parser?
 
 
 <extension point="org.eclipse.emf.ecore.extension_parser">
 
      <parser
 
             type="modelA"
 
 
class=" org.eclipse.emf.teneo.hibernate.resource.HibernateResourceFa ctory "/>
 
   </extension>
 
 
</blockquote>
It sounds like you already have that.  There's also a protocol_parser
you can register against hibernate I suppose... 
<blockquote cite="mid:gnmes3$88d$1@build.eclipse.org" type="cite"> 
 
Any advise is most welcome.
 
 
Thanks Christophe
 
 
 
 
 
 
</blockquote>
</body>
</html>

--------------020304070603030505080708--

Ed Merks
Professional Support: https://www.macromodeling.com/

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