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

Sat, 04 April 2020 05:47

Eclipse User

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
(Size: 84.36KB, Downloaded 452 times)

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 11:02

Eclipse User

any help????

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 09:17

Eclipse User

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

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