Home » Modeling » EMF » unary reference f, fESet=true, despite setting feature to null, is this correct?
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| Re: unary reference f, fESet=true, despite setting feature to null, is this correct? [message #958635 is a reply to message #958621] |
Fri, 26 October 2012 05:14  |
 Ed Merks
Messages: 33140
Registered: July 2009 |
Senior Member |
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Philipp,
Comments below.
On 26/10/2012 6:59 AM, Philipp W. Kutter | Montages AG wrote:
> I a unary reference f, the generated code for the setter includes
>
> fESet=true
>
> even if I am setting the feature to null, is this correct?
Yes, there is always one bit of additional state information associated
with an unsettable feature, i.e., the state of being used. This state
is always in addition of the value the feature has while in the state of
being set or uset.
>
> I would expect:
>
> if (oldF!=null) {fESet=true}
No, then a feature could not be considered set when set to null and
therefore we'd not be able to represent <feature xsi:nil="true/> as
being detectably different from the absence of that element from the XML
leaving us able to preserve this information upon reserialization.
>
>
> Regards, Philipp
>
>
>
> *Philipp W. Kutter
> *CEO, Dr. sc. ETH*
> * Montages AG
> Stampfenbachstr. 48
> CH-8006 Zürich
>
> tel: +41 44 260 75 57
> mob: +41 79 338 06 17
> web: *www.montages.com*
> <http://www.linkedin.com/in/kutter>
>
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Ed Merks
Professional Support: https://www.macromodeling.com/
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