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Xtend code generation: include library [message #1804551]

Thu, 28 March 2019 12:45

Eclipse User

Hello,

I am using Xtend to generate Java code based on a program written in my DSL. Alongside this generated Java code, I would like to include a library (two Java files I have already written, that won't change based on the DSL program). What is the best way to include such a library ?

I know it's possible to simply copy-paste the two Java files into an Xtend template and generate the files from there, but I would rather programatically copy the files.

Thanks in advance.

[Updated on: Thu, 28 March 2019 15:05] by Moderator

Re: Xtend code generation: include library [message #1804567 is a reply to message #1804551]

Thu, 28 March 2019 14:55

Eclipse User

hi maybe you are looking for something like http://blog.vogella.com/2010/07/06/reading-resources-from-plugin/

Re: Xtend code generation: include library [message #1804568 is a reply to message #1804567]

Thu, 28 March 2019 15:04

Eclipse User

I can't seem to get that working in Xtend. It doesn't recognize Bundle or Platform.

Re: Xtend code generation: include library [message #1804569 is a reply to message #1804568]

Thu, 28 March 2019 15:07

Eclipse User

well the problem is that is not available outside of eclipse.
the runtime module is meant to work from standalone mode as well where no plugins exist

=> you could create a Service IDoSomething
=> implement it in runtime with a impl that throws an illegalstate (or does read the file from classpath)
=> implement it in ui by using the code from above
=> add bindings to both runtime and ui
=> inject service to generator and call it from there

Re: Xtend code generation: include library [message #1804573 is a reply to message #1804569]

Thu, 28 March 2019 16:08

Eclipse User

I'll rephrase my question: is it possible to access files in the project where my xtext grammar and xtend generator are, from the project in a new Eclipse runtime, where I write programs in my DSL?

Re: Xtend code generation: include library [message #1804574 is a reply to message #1804573]

Thu, 28 March 2019 16:09

Eclipse User

what do you mean by "access files"
and what do you mean by "access from the project"

if e.g. you want to create a java library and your model project can be a java project
you can make the model project a plugin project,
create a library plugin and add it to the dependencies of the model project.

or you create a custom classpath container as XtendContainerInitializerdoes it for xtend
(you can see how that works if you
- create a java project
- create a xtend file
- it will complain about missing library
- there is a quickfx to add it

[Updated on: Thu, 28 March 2019 16:27] by Moderator

Re: Xtend code generation: include library [message #1804578 is a reply to message #1804551]

Thu, 28 March 2019 17:53

Eclipse User

Quote:

I'll rephrase my question: is it possible to access files in the project where my xtext grammar and xtend generator are, from the project in a new Eclipse runtime, where I write programs in my DSL?

Nothing is impossible, but this approach does not make sense. Put your library into a library project and reference the library like you would do for any other Java library. If your target project is a plugin project, the library should also be a plugin project and use plugin dependencies. If the library is plain Java, build a Jar and use it as a referenced library.

The target project where the code is generated to is "just" a Java project, so think that you need a library in a Java project. That's it.

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