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Loading classes in Xbase-based DSL with interpreter [message #1802421]

Fri, 08 February 2019 10:01

Eclipse User

I've developed a DSL based on Xbase and have written a Java model inferrer that seems to correctly resolve classes that the enclosing project depends on. In particular, it finds classes and methods in a registered extension class.

I've also written an interpreter and an action to invoke it in the DSL editor. The interpreter, however, seems to use the classloader of the DSL UI project, so it differs from what the editor resolves. I know I can add the extension class (or the bundle it's in) to the UI project dependencies, but I also want it to pick up the classes in the enclosing project, i.e. the same as those seen by the editor. I notice the interpreter has a setClassLoader method, is there a pre-made classloader I can use to get the desired effect?

Regards,

Hallvard

Re: Loading classes in Xbase-based DSL with interpreter [message #1802422 is a reply to message #1802421]

Fri, 08 February 2019 10:14

Eclipse User

i did some experiments with this years ago.
dont know if this still works
https://github.com/cdietrich/mql/blob/master/org.eclipse.xtext.mql.ui/src/org/eclipse/xtext/mqrepl/ui/handler/ModelQueryInterpreterHandler.java

Re: Loading classes in Xbase-based DSL with interpreter [message #1802425 is a reply to message #1802422]

Fri, 08 February 2019 10:49

Eclipse User

It's a good start, thanks! I was hoping Xtext/Xbase had something I could use, since it necessarily needs to keep track of the classpath when it populates the JvmType model.

Re: Loading classes in Xbase-based DSL with interpreter [message #1802510 is a reply to message #1802425]

Mon, 11 February 2019 04:06

Eclipse User

I'm using the interpreter in one of my DSL.
I configure the class loader, inspired by one of the implementations of the seven languages in seven weeks.
This is the implementation: https://github.com/LorenzoBettini/edelta/blob/master/edelta.parent/edelta/src/edelta/interpreter/internal/EdeltaInterpreterConfigurator.java

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