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[Xtext/Xtend] Issue when calling xtext generator from a context menu [message #1174732]

Thu, 07 November 2013 09:30

Davide G

Messages: 31
Registered: October 2013

Member

Hi, I'm having troubles in calling the generator from a context menu. I correctly (i think) set up the plugin file, the handler, everything. When i select the generation command from the context menu the handler is called, but the method doGenerate from filesystemaccess2 class catches an InvocationTargetException. Here's the document with the interest sections from plugin.xml, generationhandler.java and generator xtend file. Can you see something wrong?

Here's the plugin.xml part

<!--
   <extension
         point="org.eclipse.xtext.builder.participant">
      <participant
            class="org.cnr.ui.DocgenExecutableExtensionFactory:org.eclipse.xtext.builder.IXtextBuilderParticipant">
      </participant>
   </extension>
   -->
   
   <extension
        point="org.eclipse.ui.handlers">
     <handler
           class="org.cnr.ui.DocgenExecutableExtensionFactory:org.cnr.PassiDocGen.ui.GenerationHandler"
           commandId="org.cnr.PassiDocGen.ui.handler.GenerationCommand">
     </handler>
      
  </extension>
   
   
   <extension
        point="org.eclipse.ui.commands">
        <command name="Generate Code"
              id="org.cnr.PassiDocGen.ui.handler.GenerationCommand">
        </command>
  </extension>
   
    <extension point="org.eclipse.ui.menus">
    <menuContribution locationURI="popup:org.eclipse.jdt.ui.PackageExplorer">
        <command
            commandId="org.cnr.PassiDocGen.ui.handler.GenerationCommand"
            style="push">
            <visibleWhen
                  checkEnabled="false">
                  <iterate>
       <adapt type="org.eclipse.core.resources.IResource">
          <test property="org.eclipse.core.resources.name" 
                value="*.mydsl"/>
       </adapt>
    </iterate>
            </visibleWhen>
        </command>
    </menuContribution>
    </extension>

This is the handler method:

@Override
	 public Object execute(ExecutionEvent event) throws ExecutionException 
	 {
	 
		 ISelection selection = HandlerUtil.getCurrentSelection(event);
		 if (selection instanceof IStructuredSelection) 
		 {
			 IStructuredSelection structuredSelection = (IStructuredSelection) selection;
			 Object firstElement = structuredSelection.getFirstElement();
			 if (firstElement instanceof IFile) 
			 {
				 IFile file = (IFile) firstElement;
				 IProject project = file.getProject();
				 IFolder srcGenFolder = project.getFolder("src-gen");
				 if (!srcGenFolder.exists()) 
				 {
					 try 
					 {
						 srcGenFolder.create(true, true,new NullProgressMonitor());
					 } 
					 catch (CoreException e) 
					 {
					 return null;
					 }
				 }
	 
				 final EclipseResourceFileSystemAccess2 fsa = fileAccessProvider.get();
				
				 fsa.setOutputPath(srcGenFolder.getFullPath().toString());
				 
				 URI uri = URI.createPlatformResourceURI(file.getFullPath().toString(), true);
				 ResourceSet rs = resourceSetProvider.get(project);
				 Resource r = rs.getResource(uri, true);
				 
				 generator.doGenerate(r, fsa);
				 
			 }
		 }
		 return null;
	 }

And this is the xtend generator method

override void doGenerate(Resource resource, IFileSystemAccess fsa) 
	{
		for (g : resource.allContents.toIterable.filter(Model)) 
		{
        	fsa.generateFile("salut.txt",g.compile)
		}
	}
	
	def compile(Model m)
	'''
		Hello?!?
	'''

I hope someone can help me. =\

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Re: [Xtext/Xtend] Issue when calling xtext generator from a context menu [message #1174740 is a reply to message #1174732]

Thu, 07 November 2013 09:31

Christian Dietrich

Messages: 13488
Registered: July 2009

Senior Member

Hi,

can you post the exception?

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
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Re: [Xtext/Xtend] Issue when calling xtext generator from a context menu [message #1174760 is a reply to message #1174740]

Thu, 07 November 2013 09:50

Davide G

Messages: 31
Registered: October 2013

Member

Hi christian, the problem is that i can't get any output from eclipse. When i debug the code from handler and step from doGenerate method, it goes to this block of code of MethodRequestor.java class ("execute" method):

catch (InvocationTargetException e) {
			Throwable originalException = e.getCause();
			throw new InjectionException((originalException != null) ? originalException : e);
		} finally {

I also noticed that the project field for fsa was null, by nothing changed adding

fsa.setProjet(Project);

before calling doGenerate

[Updated on: Thu, 07 November 2013 09:51]

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