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[EMF.core] EcoreUtils.resolve() do not return the actual instance [message #717206]

Fri, 19 August 2011 15:29

simon.vivien

Messages: 21
Registered: August 2011

Junior Member

Hi,

I am currently trying to resolve proxies with the EcoreUtils.resolve() method, but the returned object is a copy of the original object.

I am wondering if there is any way to retrieve the orginal object or not.

Thanks,

Simon.

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Re: [EMF.core] EcoreUtils.resolve() do not return the actual instance [message #717230 is a reply to message #717206]

Fri, 19 August 2011 16:17

Ed Merks

Messages: 33142
Registered: July 2009

Senior Member

Simon,

What exactly do you mean by "the original object"? Resolving a proxy
involves searching the resource set for a resource with the proxy's URI
and then resolving the fragment of the URI within that resource. If
there exists an object in the resource set already, that one will be
returned. Otherwise a resource will be loaded into the resource set.
Given there can be an arbitrary number of resource sets in your JVM, you
can have an arbitrary number of copies of anything, none of which is
special in a way that you wold call it "the original" version.

On 19/08/2011 8:29 AM, simon.vivien wrote:
> Hi,
>
> I am currently trying to resolve proxies with the EcoreUtils.resolve()
> method, but the returned object is a copy of the original object.
>
> I am wondering if there is any way to retrieve the orginal object or not.
>
>
> Thanks,
>
> Simon.

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

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Re: [EMF.core] EcoreUtils.resolve() do not return the actual instance [message #717725 is a reply to message #717230]

Mon, 22 August 2011 07:44

simon.vivien

Messages: 21
Registered: August 2011

Junior Member

It effectively make sense.

Thanks

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Re: [EMF.core] EcoreUtils.resolve() do not return the actual instance [message #717768 is a reply to message #717725]

Mon, 22 August 2011 09:34

simon.vivien

Messages: 21
Registered: August 2011

Junior Member

Hi again,

In my case, it doesn't matter since the EObject represented by the proxies I resolve have a EAttribute with ID property set to true, but if they were NOT, how can it be possible to compare the instance returned by the proxy resolution with the object the proxy is supposed to represent ?

Simon

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Re: [EMF.core] EcoreUtils.resolve() do not return the actual instance [message #717830 is a reply to message #717768]

Mon, 22 August 2011 13:30

Eclipse User

Originally posted by: Rich Kulp

While it is a proxy eProxy() returns true. When it is resolved the proxy
is physically replaced with the resolved copy and eProxy() will return
false.

--
Thanks,
Rich Kulp

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Re: [EMF.core] EcoreUtils.resolve() do not return the actual instance [message #717871 is a reply to message #717768]

Mon, 22 August 2011 14:51

Ed Merks

Messages: 33142
Registered: July 2009

Senior Member

Simon,

Comments below.

On 22/08/2011 2:34 AM, simon.vivien wrote:
> Hi again,
>
> In my case, it doesn't matter since the EObject represented by the
> proxies I resolve have a EAttribute with ID property set to true,
Certainly it will be possible for there to be multiple objects with the
same ID, though they'll need to be contained by different resources. So
having the same ID won't make them identical.
> but if they were NOT, how can it be possible to compare the instance
> returned by the proxy resolution with the object the proxy is supposed
> to represent ?
Define what you mean by "the object the proxy is supposed to
represent". If you have a resource set in your JVM already containing
the exact objects you want to reuse, you ought to be loading all your
resources in that resource set.
>
> Simon

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

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