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Home » Modeling » TMF (Xtext) » Loading operator extension from Jar file
Loading operator extension from Jar file [message #1734022] Fri, 03 June 2016 06:43 Go to next message
Stéphane Galland is currently offline Stéphane GallandFriend
Messages: 123
Registered: July 2014
Location: Belfort, France
Senior Member
Dear all.

I'm writing an library that is providing math primitives such as vectors, matrices, etc.

Currently, I have hard-coded the Xbase operators in the primitives by creating functions like:
public Vector operator_plus(Vector a) {
    Vector v = new Vector(this);
    v.add(a);
    return v;
}


The use of the operators in my DSL is working.

Now, I would like to move these functions into a static utility class similar to the MapExtensions provided by Xtext.

The problem is:
is it possible for the DSL compiler to automatically load this extension when the Jar file of my math library is present in the classpath of the compiled project?

I would like to find some automatic approach that do not requires to change neither the compiler's configuration nor its code.

I know how to add an extension in the DSL compiler. But I would like to know if the Xtext provides tools for dynamic loading.

All the best.
Stéphane.
Re: Loading operator extension from Jar file [message #1734149 is a reply to message #1734022] Sun, 05 June 2016 08:45 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14665
Registered: July 2009
Senior Member
hi i am not sure if i get your question, but extension classes like MapExtensions are registered through ImplicitlyImportedFeatures respectively StaticImplicitMethodsFeatureForTypeProvider

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Re: Loading operator extension from Jar file [message #1734160 is a reply to message #1734149] Sun, 05 June 2016 14:34 Go to previous messageGo to next message
Stéphane Galland is currently offline Stéphane GallandFriend
Messages: 123
Registered: July 2014
Location: Belfort, France
Senior Member
Thank you for your reply.
Are the ImplicityImportedFeatures or StaticImplicitMethodsFeatureForTypeProvider able to dynamically load the extensions by reading the MANIFEST file of a JAr file in the classpath.
In other words, is it possible to implicitly load features stored in a Jar file, just by adding this Jar file.

If not, I should specialize ImplicityImportedFeatures or StaticImplicitMethodsFeatureForTypeProvider in my DSL compiler.

All the best.
Stéphane.
Re: Loading operator extension from Jar file [message #1734164 is a reply to message #1734160] Sun, 05 June 2016 14:52 Go to previous message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14665
Registered: July 2009
Senior Member
I'd make the extension static and adapt implicitelyimortedfeatures. And yes the class file needed to be on the class path of the dsl file

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
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