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PostProcessing [message #1784224]

Fri, 23 March 2018 17:53

Greg Lusk

Messages: 32
Registered: February 2017
Location: USA

Member

Since it looks like post processing was deprecated a while back, what is the recommended way to add model features and set initial values? Do we have to import a custom ecore model and add a node with the features that we want to add, and then inherit from the model element in the dependent grammar? Is our only other choice to use a static model instead of a generated one?

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Re: PostProcessing [message #1784225 is a reply to message #1784224]

Fri, 23 March 2018 17:56

Christian Dietrich

Messages: 12386
Registered: July 2009

Senior Member

Hi,

about which postprocessing do you talk about?
the one for the inferred metamodel?

i think the intention of the guys who decided this was to switch to a manual metamodel.
but i also think it should be no problem to still use it.
the workaround is described at https://bugs.eclipse.org/bugs/show_bug.cgi?id=483209

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Re: PostProcessing [message #1784226 is a reply to message #1784225]

Fri, 23 March 2018 18:01

Greg Lusk

Messages: 32
Registered: February 2017
Location: USA

Member

Yes, I'm referring to the one for the inferred metamodel. I was trying to follow the example from your 2011 blog post, and came across the bug that you logged in 2015. I'll see if I can adapt the example in your blog post to 2.12 before I switch to a manual metamodel.

[Updated on: Fri, 23 March 2018 18:02]

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Re: PostProcessing [message #1784860 is a reply to message #1784226]

Wed, 04 April 2018 21:10

Greg Lusk

Messages: 32
Registered: February 2017
Location: USA

Member

Christian,

I am working on adapting your 2011 blog post to Xtext 2.14, but it seems that I can no longer extend the org.eclipse.xtext.generator.Generator class to create a custom generator. Can you recommend how I would substitute my custom generator in the current version?

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Re: PostProcessing [message #1784880 is a reply to message #1784860]

Thu, 05 April 2018 07:02

Christian Dietrich

Messages: 12386
Registered: July 2009

Senior Member

i dont undestand why you mean by "can no longer"

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Re: PostProcessing [message #1784902 is a reply to message #1784880]

Thu, 05 April 2018 13:26

Greg Lusk

Messages: 32
Registered: February 2017
Location: USA

Member

In your original blog post, you created a class called ExtendedGenerator that inherits from org.eclipse.xtext.generator.Generator. But it seems that org.eclipse.xtext.generator.Generator does not exist any more in that package. So would I inherit from XtextGenerator instead, like so?

import org.eclipse.xtext.xtext.generator.XtextGenerator;
import org.eclipse.xtext.XtextRuntimeModule;
import org.eclipse.xtext.XtextStandaloneSetup;
import org.eclipse.xtext.xtext.ecoreInference.IXtext2EcorePostProcessor;
 
import com.google.inject.Guice;
import com.google.inject.Injector;
public class ExtendedGenerator extends XtextGenerator {
	  public ExtendedGenerator() {
	        new XtextStandaloneSetup() {
	            @Override
	            public Injector createInjector() {
	                return Guice.createInjector(new XtextRuntimeModule() {
	                   
	                    @SuppressWarnings("unused")
						public Class<? extends IXtext2EcorePostProcessor> bindEcorePostProcessor() {
	                        return StructuredTextEcorePostProcessor.class;
	                    }
	                });
	            }
	        }.createInjectorAndDoEMFRegistration();
	    }
}

Or do I even need to create the ExtendedGenerator class, since I can just specify the binding for my custom EcorePostProcessor in my language's Module class like so:

def Class<? extends IXtext2EcorePostProcessor> bindEcorePostProcessor(){
		return StructuredTextEcorePostProcessor
	}

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Re: PostProcessing [message #1784904 is a reply to message #1784902]

Thu, 05 April 2018 13:40

Christian Dietrich

Messages: 12386
Registered: July 2009

Senior Member

please have a look at the bugzilla. it tells you what do do.

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Re: PostProcessing [message #1784905 is a reply to message #1784904]

Thu, 05 April 2018 13:43

Christian Dietrich

Messages: 12386
Registered: July 2009

Senior Member

here the usage in wf (in case you did not figure that out yourself)

Workflow {

component = ExtendedXtextGenerator {
postprocessor = MyXtext2EcorePostProcessor {}

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