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Reference to external project [message #893485]

Wed, 04 July 2012 06:37

Marco Tinacci
Messages: 4
Registered: May 2012

Junior Member

I need to use classes from an external java project in my xtext project. I have added the project to the build path but the eclipse application has problems with showing the code of files of my language: it shows instead a white frame and a nullPointerException. That happens if and only if I use a class from an external project.
Can anyone help me, please?

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Re: Reference to external project [message #893586 is a reply to message #893485]

Wed, 04 July 2012 13:23

Christian Dietrich
Messages: 4419
Registered: July 2009

Senior Member

Hi,

can you elaborate what you are doing? what step do i have to do the reproduce the problem

~Christian

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Re: Reference to external project [message #893834 is a reply to message #893586]

Thu, 05 July 2012 11:48

Marco Tinacci
Messages: 4
Registered: May 2012

Junior Member

Hi Christian, I'll try to give you a minimal example of my case:
create a Greetings Xtext project and, after the generation of the artifacts, implement the generator class as follow

override void doGenerate(Resource resource, IFileSystemAccess fsa) {
	Example::printHello
}

where Example is a simple class in another project that has been added to the project references.

package example;
public class Example {
	public static void printHello(){
		System.out.println("Hello World!");
	}
}

When I launch the Eclipse instance I get the error when I save a mydsl file without syntax errors:

Errors occurred during the build.
Errors running builder 'Xtext Project Builder' on project 'example'.
example/Example

and of course it doesn't print "Hello World!" on the console.

The problem is not exactly what I get on my real project and I haven't figured out how to reproduce it yet but I think that this case is somehow related.

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Re: Reference to external project [message #893836 is a reply to message #893834]

Thu, 05 July 2012 11:59

Christian Dietrich
Messages: 4419
Registered: July 2009

Senior Member

Hi please make sure you reference the other project with osgi/eclipse
plugin means. Don't use project references

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

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Re: Reference to external project [message #893985 is a reply to message #893485]

Fri, 06 July 2012 06:37

Marco Tinacci
Messages: 4
Registered: May 2012

Junior Member

Ok, I'll try this way. Thanks for the help Smile

[Updated on: Fri, 06 July 2012 06:38]

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