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EMF sometimes doesn't resolve Proxy [message #1064710]

Thu, 20 June 2013 15:29

Tommaso De Sica

Messages: 131
Registered: March 2012
Location: Italy

Senior Member

Goodevening everyone,

I've got two reference to the same EObject, one with containment true one with containment false.

The situation is this:

Object A, B and C

Object A ---containment=true--->B
Object C ---containment=false--->B

So the XMI looks like this:

<Object A id="AAA">
   <listOfB>
      <Object B id="BB1" />
      <Object B id="BB2" />
   </listOfB>
</Object A>

....

<Object C id="CCC">
   <listOfB>
      <href="#BB1" />
   </listOfB>
</Object A>

Then, I load the resource and if I try to get object BB1 from objectA.getListOfB.get(0) I've got real Object B, but if try to do the same with ObjectC:
objectC.getListOfB.get(0) I've got a Proxy.

The only way to receive real object B that I've found is:

objectC.eResource().getEObject(EcoreUtil.getURI(objectC.getListOfB.get(0)).fragment());

Why this?

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Re: EMF sometimes doesn't resolve Proxy [message #1064724 is a reply to message #1064710]

Thu, 20 June 2013 16:30

Ed Merks

Messages: 33140
Registered: July 2009

Senior Member

Tommaso,

Comments below.

On 20/06/2013 5:29 PM, Tommaso De Sica wrote:
> Goodevening everyone,
>
> I've got two reference to the same EObject, one with containment true
> one with containment false.
>
> The situation is this:
>
> Object A, B and C
>
> Object A ---containment=true--->B
> Object C ---containment=false--->B
>
> So the XMI looks like this:
>
>
> <Object A id="AAA">
> <listOfB>
> <Object B id="BB1" />
> <Object B id="BB2" />
> </listOfB>
> </Object A>
>
> ...
>
> <Object C id="CCC">
> <listOfB>
> <href="#BB1" />
> </listOfB>
> </Object A>
>
>
> Then, I load the resource and if I try to get object BB1 from
> objectA.getListOfB.get(0) I've got real Object B, but if try to do the
> same with ObjectC:
> objectC.getListOfB.get(0) I've got a Proxy.
>
> The only way to receive real object B that I've found is:
>
> objectC.eResource().getEObject(EcoreUtil.getURI(objectC.getListOfB.get(0)).fragment());
>
>
> Why this?
What URI are you using to load the resource? Perhaps not an absolute URI?

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

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Re: EMF sometimes doesn't resolve Proxy [message #1064793 is a reply to message #1064724]

Fri, 21 June 2013 07:25

Tommaso De Sica

Messages: 131
Registered: March 2012
Location: Italy

Senior Member

Inside XMI file I see only the UUID of referred object (it stay in the same file). Inside eProxy there is my procotol URI that will be mapped to absolute URI (file://E:/....); but I couldn't catch the moment of resolution.

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Re: EMF sometimes doesn't resolve Proxy [message #1064801 is a reply to message #1064793]

Fri, 21 June 2013 07:47

Ed Merks

Messages: 33140
Registered: July 2009

Senior Member

Tommaso,

Set a breakpoint in ResourceImpl.getEObject to see what this URI doesn't
resolve.

On 21/06/2013 9:25 AM, Tommaso De Sica wrote:
> Inside XMI file I see only the UUID of referred object (it stay in the
> same file). Inside eProxy there is my procotol URI that will be mapped
> to absolute URI (file://E:/....); but I couldn't catch the moment of
> resolution.

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

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