| Show only parent nodes. [message #1804450] |
Tue, 26 March 2019 10:36  |
 Bushra Harraq
Messages: 5
Registered: February 2019 |
Junior Member |
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Hi,
in the follwing the metamodel constellation is documented:
http://prntscr.com/n32fnd
To get all the Processes:
Now, I want to show all node, which don't have a parent Process. Here is my approach, which does not work. Please correct me.
aql: self.process -> select(myProcess | myProcess.eInverse(subProcesses) -> size = 0)
Thank you,
Bushra
[Updated on: Tue, 26 March 2019 13:12] Report message to a moderator |
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| Re: Show only parent nodes. [message #1804476 is a reply to message #1804450] |
Tue, 26 March 2019 14:28  |
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Hi Bushra,
The AQL documentation can be found here: https://www.eclipse.org/acceleo/documentation/
There are several eInverse method with or without parameters:
- eInverse() (no parameter) : returns any element which as a relationship with the current one
- eInverse(packageName::EClassName) : returns only instances of the given type.
- eInverse('featureName') : more explicit and query for a specific reference name
Please also note that
- -> isEmpty is equivalent to -> size() = 0
- the opposites would be myEelement.ref1.ref2 -> size() <> 0 or not (myElement.ref1.ref2 -> isEmpty())
In your case, you should try:
aql: self.process -> select(myProcess | myProcess.eInverse('subProcesses') -> isEmpty())
Regards,
Maxime Porhel - Obeo
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