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EReference Containment [message #646161]

Wed, 22 December 2010 13:17

Arun

Messages: 16
Registered: October 2010

Junior Member

Hi All,

Can someone kindly explain to me the difference between a EClass (say Class1) that has an EReference (REF_X of EType Class2) with Containment set to true and an EClass (Class1) that has an EReference (REF_X of EType Class2 and opposite to REF_Y (of type Class1) of Class2) with Contaiment set to true.

Both of them give the same result in the model. I was wondering if someone could explain me the difference.

Kind regards
Arun

[Updated on: Wed, 22 December 2010 13:18]

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Re: EReference Containment [message #646195 is a reply to message #646161]

Wed, 22 December 2010 15:53

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

Am 22.12.2010 14:17, schrieb Arun:
> Hi All,
>
> Can someone kindly explain to me the difference between a EClass (say Class1) that has an EReference (REF_X of EType Class2) with Containment set to true and an EClass (Class1) that has an EReference (REF_X of EType Class2 and opposite to REF_Y (of type Class1) of Class2).
> Both of them give the same result in the model. I was wondering if someone could explain me the difference.
You see the difference when you add an element of REF_X to a second reference that has containment=true. Generally an object can be contained by at most one container. This is ensured because the framework automatically removes objects from their old container.

Cheers
/Eike

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Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

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