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Initialization in Xtext Validation [message #1662866]

Tue, 10 March 2015 02:49

Eclipse User

Hi all,
I have a validation class. My all validation warnings/ error markers use some common data.

So I want to prepare some common data before even a single validation check is triggered.

Is there something already available to initialize data before checks are invoked ?

Thanks for any help Smile

Re: Initialization in Xtext Validation [message #1662876 is a reply to message #1662866]

Tue, 10 March 2015 02:50

Eclipse User

Hi,

is the common data context free or not (depends on model)?

~Christian

Re: Initialization in Xtext Validation [message #1663016 is a reply to message #1662876]

Tue, 10 March 2015 04:17

Eclipse User

Hi Christian,
Thanks for the reply.
Yes its context free data. It does not depend on the model.

Regards,
Arshad

Re: Initialization in Xtext Validation [message #1663066 is a reply to message #1663016]

Tue, 10 March 2015 04:47

Eclipse User

you could do this eg. in the register method of the validator then

Re: Initialization in Xtext Validation [message #1663128 is a reply to message #1663066]

Tue, 10 March 2015 05:24

Eclipse User

Hi,

Thanks Christian..

Can't I write a static block for the validation class ?

Will it have problems ?

Regards,
Arshad

Re: Initialization in Xtext Validation [message #1663145 is a reply to message #1663128]

Tue, 10 March 2015 05:31

Eclipse User

i dont know

Re: Initialization in Xtext Validation [message #1679122 is a reply to message #1663145]

Mon, 16 March 2015 09:32

Eclipse User

Let me chime in here:
In some validators I do some caching which is valid for the duration of validating one resource.
I would be interested in hooks for (initializing and) clearing that cache.
I.e., more importantly than initialization (which I can do on-demand), I'd need a hook that is triggered when validation for a particular resource is done.
It seems I would need to override one of the final validate or internalValidate methods :-/

Stephan

Re: Initialization in Xtext Validation [message #1679123 is a reply to message #1679122]

Mon, 16 March 2015 09:34

Eclipse User

hi,

have a look at org.eclipse.xtext.validation.AbstractDeclarativeValidator.getContext() maybe it can be used as cache storage

[Updated on: Mon, 16 March 2015 09:37] by Moderator

Re: Initialization in Xtext Validation [message #1679214 is a reply to message #1679123]

Mon, 16 March 2015 10:20

Eclipse User

Quote:

have a look at org.eclipse.xtext.validation.AbstractDeclarativeValidator.getContext() maybe it can be used as cache storage

Thanks.
Can you say what is the lifecycle of that map? Is it ever cleared?

Re: Initialization in Xtext Validation [message #1679224 is a reply to message #1679214]

Mon, 16 March 2015 10:25

Eclipse User

Hi,

afaik it is per resource

Re: Initialization in Xtext Validation [message #1679243 is a reply to message #1679224]

Mon, 16 March 2015 10:32

Eclipse User

Quote:

afaik it is per resource

sounds good, thanks.

Re: Initialization in Xtext Validation [message #1679274 is a reply to message #1679243]

Mon, 16 March 2015 10:47

Eclipse User

To close the loop: the following method defines the lifecycle of that context map:

org.eclipse.emf.ecore.util.Diagnostician.validate(EObject, Map<?, ?>)

So if no-one leaks the reference to the map it should be subject to GC after that method terminates.
And indeed this validate method is invoked for the main element of each resource.
While it does not provide a hook for cleanup it should implicitly free the memory.

thanks again.

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