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Show only parent nodes. [message #1804450]

Tue, 26 March 2019 06:36

Eclipse User

Hi,

in the follwing the metamodel constellation is documented:

http://prntscr.com/n32fnd

To get all the Processes:

aql: self.process

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 09:12] by Moderator

Re: Show only parent nodes. [message #1804476 is a reply to message #1804450]

Tue, 26 March 2019 10:28

Eclipse User

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,

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