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Xtext Referencing Not Working in Java Project [message #1808953]

Thu, 04 July 2019 18:24

Eclipse User

I followed the 15 minute tutorial exactly, with no changes on my part, and everything was working great up until I split up the Blog model into separate files. I kept getting "could not resolve" errors for `HasAuthor` and the `String` type.

I made sure to generate the Xtext artifacts after the second iteration to the grammar, and I reran the plug-in as an Eclipse application.

It just wouldn't work until I converted the Blog package to an Xtext project. Then everything resolved correctly. Was I doing something wrong? Was I supposed to create a new Xtext project all along instead of a Java project? I mean the instructions say to create a new Java project after you run the plug-in for the first time so I'm not sure...

If you want to verify the code...
datatypes.dmodel

datatype String

commons.dmodel

package my.company.common {
	entity HasAuthor {
		author: String
	}
}

blog.dmodel

package my.company.blog {
	import my.company.common.*
	
	entity Blog {
		title: String
		many posts: Post
	}
	
	entity Post extends my.company.common.HasAuthor {
		title: String
		content: String
		many comments: Comment
	}
	
	entity Comment extends HasAuthor {
		content: String
	}
}

Re: Xtext Referencing Not Working in Java Project [message #1809261 is a reply to message #1808953]

Fri, 12 July 2019 11:10

Eclipse User

you should

(1) create a xtext projet, create your grammar, run the workflow
(2) start eclipse runtime
(3a) if you already have the grammar based on xtext create a java project and put model files in a source folder (or package within)
(3b) if you dont have xbase yet you can create a general -> project too
(4) if you create a file you are asked if you want to convert the project to a xtext project. you have to answer yes. (you can do the same with right click configure on the project)
(5) make sure you have build automatically on and the file extension is correct (including casing)

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