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How to get all of the instances of a class using AQL queries [message #1823940]

Sat, 04 April 2020 09:47

maryam mehrabi

Messages: 25
Registered: May 2019

Junior Member

Hello all,

I have a situation in my metamodel just like the figure below. Now I created a graphical editor using sirius for it but I had two questions when the elements generated by the user using pallette.

metamodel:
index.php/fa/37747/0/

viewpoint file:
index.php/fa/37748/0/

1. I want when the user tries to create classA element the creation will check using an AQL query and if the element generated before the element doesn't create again. Now the problem is how could I get all of the classA instances in AQL ?????

2. In advance, how could I check the att1 attribute type in each instance and for example if the att1 is T1 the element does not create?????? how could I reach to this attribute type in instances?????

I will appreciate if anyone could help :-)

Maryam

Attachment: metamodel.jpg
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Attachment: viewpoint.jpg
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Re: How to get all of the instances of a class using AQL queries [message #1824020 is a reply to message #1823940]

Mon, 06 April 2020 15:02

maryam mehrabi

Messages: 25
Registered: May 2019

Junior Member

any help????

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Re: How to get all of the instances of a class using AQL queries [message #1824139 is a reply to message #1823940]

Wed, 08 April 2020 13:17

Pierre-Charles David

Messages: 549
Registered: July 2009

Senior Member

Hi,

to find all the instances of a class in the same model/resource, you can use an expression like this:

aql:self.eResource().eAllContents(my::Type)

See the AQL reference documentation for more details: https://www.eclipse.org/acceleo/documentation/aql.html

Pierre-Charles David - Obeo

Need training or professional services for Sirius?
http://www.obeodesigner.com/sirius

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