How invoke xtend2 generator from java class?

Question

I use Xtext framwork for my DSL and I want to generate code by a toolbar bottom. I get the file selected from workbench but how can I call Xtend generator? I don't know how I can get the resource param for doGenerate.

Answer 1

Although the question was a bit different, my answer holds here as well: How to invoke Xtext parser/JvmModelInferrer from a Java project

Basically, use the injector Xtext generates and get the IGenerator instance.