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[EMF Forms] validation processing [message #1711572]

Sat, 17 October 2015 15:03

Klim Tow

Messages: 49
Registered: September 2015

Member

Hi

I wonder how it is intended to process invalid forms, i.e. those with failed validation.

As far I can see, EMF Forms only adds highlighting if there are constraint violations (also maybe some other things I am not aware of). But it does not disable any buttons, so it is always possible to create model objects, no matter if they are invalid.

Actually the primary goal of validation is to prevent creating invalid state, so I am sure that I am missing something, but I can't find appropriate documentation relating to this issue.

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Re: [EMF Forms] validation processing [message #1711728 is a reply to message #1711572]

Mon, 19 October 2015 13:00

Jonas Helming

Messages: 699
Registered: July 2009

Senior Member

Hi,

EMF itself does not prevent creating invalid states and so doesn't EMF
Forms, which does not add any additional logic here. Validation is
checking a current model instance against those rules. However, for some
model constraints it would be possible to enforce them beforehand.
I assume you talking about multiplicities? They could actually be
enforced by multi-attribute and multi-references controls, but that
would require some customization.

Best regards

Jonas

Am 17.10.2015 um 17:03 schrieb Klim Tow:
> Hi
>
> I wonder how it is intended to process invalid forms, i.e. those with
> failed validation.
>
> As far I can see, EMF Forms only adds highlighting if there are
> constraint violations (also maybe some other things I am not aware of).
> But it does not disable any buttons, so it is always possible to create
> model objects, no matter if they are invalid.
>
> Actually the primary goal of validation is to prevent creating invalid
> state, so I am sure that I am missing something, but I can't find
> appropriate documentation relating to this issue.

--
--

Jonas Helming

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Re: [EMF Forms] validation processing [message #1711744 is a reply to message #1711728]

Mon, 19 October 2015 13:40

Klim Tow

Messages: 49
Registered: September 2015

Member

Hi Jonas

normally if the mandatory fields are not set, the OK-Button should be disabled.
Those fields can be of primitive types or references (multi or single, that's insignificant)

Klim

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Re: [EMF Forms] validation processing [message #1711826 is a reply to message #1711744]

Tue, 20 October 2015 05:17

Jonas Helming

Messages: 699
Registered: July 2009

Senior Member

Hi,

yes, but there is no OK button in EMF Forms. If you embed it into a
dialog, you can program the OK button to behave exactly in the way you
described.

Best regards

Jonas

Am 19.10.2015 um 15:40 schrieb Klim Tow:
> Hi Jonas
>
> normally if the mandatory fields are not set, the OK-Button should be
> disabled.
> Those fields can be of primitive types or references (multi or single,
> that's insignificant)
>
> Klim

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--

Jonas Helming

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Re: [EMF Forms] validation processing [message #1711897 is a reply to message #1711826]

Tue, 20 October 2015 09:26

Klim Tow

Messages: 49
Registered: September 2015

Member

yes, you are right - there are only OK buttons in multi-attribute and multi-references controls

what would be the best way to customize them - custom renderers which extend the controls?

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Re: [EMF Forms] validation processing [message #1711911 is a reply to message #1711897]

Tue, 20 October 2015 09:44

Jonas Helming

Messages: 699
Registered: July 2009

Senior Member

Exactly...

Am 20.10.2015 um 11:26 schrieb Klim Tow:
> yes, you are right - there are only OK buttons in multi-attribute and
> multi-references controls
>
> what would be the best way to customize them - custom renderers which
> extend the controls?

--
--

Jonas Helming

Get professional Eclipse developer support:

http://eclipsesource.com/en/services/developer-support/

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