Implementing Domain-Specific Languages with Xtext and Xtend

Writing a code generator in Xtend

A generator stub is automatically created by Xtext. In our example the stub is created in the package org.example.entities.generator:

class EntitiesGenerator implements IGenerator {
  override void doGenerate(Resource res, IFileSystemAccess fsa) {
    // TODO implement me
  }
}

Before writing the actual code, let us recall that Xtext is a framework, thus, the overall flow of control is dictated by the framework, not by the programmer (this is also known as the Hollywood Principle: "Don't call us, we'll call you"). This means that you do not have to run the generator; your DSL Xtext editor is already integrated in the automatic building infrastructure of Eclipse, and the generator will be automatically called when a source ...