Eclipse Community Forums: TMF (Xtext) » Initialization in Xtext Validation

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

Tue, 10 March 2015 06:50

Messages: 14665
Registered: July 2009

Senior Member

Hi,

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

~Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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

Tue, 10 March 2015 08:17

Arshad Adavani

Messages: 163
Registered: July 2013
Location: Bangalore

Senior Member

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

Regards,
Arshad

Arshad

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

Tue, 10 March 2015 08:47

Messages: 14665
Registered: July 2009

Senior Member

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

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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

Tue, 10 March 2015 09:24

Arshad Adavani

Messages: 163
Registered: July 2013
Location: Bangalore

Senior Member

Hi,

Thanks Christian..

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

Will it have problems ?

Regards,
Arshad

Arshad

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

Tue, 10 March 2015 09:31

Messages: 14665
Registered: July 2009

Senior Member

i dont know

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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

Mon, 16 March 2015 13:32

Messages: 1853
Registered: July 2009

Senior Member

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 13:34

Messages: 14665
Registered: July 2009

Senior Member

hi,

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

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

[Updated on: Mon, 16 March 2015 13:37]

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

Mon, 16 March 2015 14:20

Messages: 1853
Registered: July 2009

Senior Member

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 14:25

Messages: 14665
Registered: July 2009

Senior Member

Hi,

afaik it is per resource

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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

Mon, 16 March 2015 14:32

Messages: 1853
Registered: July 2009

Senior Member

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 14:47

Messages: 1853
Registered: July 2009

Senior Member

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.