如何从Java类以编程方式运行扩展代码生成器

Question

我试图通过定义DSL和执行M2M以及M2T(代码生成)来实现模型驱动的开发。对于代码生成，我选择使用扩展和模板定义。您能提供示例代码或链接到解释如何从Java代码调用模板展开的文档吗?

注:我发现很难在Eclipse之外的独立模式下运行这些东西，所以我从编写简单的Java实用程序开始。

Answer 1

下面的代码可供感兴趣的人使用:

    Resource.Factory.Registry reg = Resource.Factory.Registry.INSTANCE;
    Map<String, Object> factoryMap = reg.getExtensionToFactoryMap();
    factoryMap.put(Resource.Factory.Registry.DEFAULT_EXTENSION, new XMIResourceFactoryImpl());
    ResourceSet resourceSet = new ResourceSetImpl();
    EPackage PSM_Pkg = MyDSLPackage.eINSTANCE;
    resourceSet.getPackageRegistry().put(PSM_Pkg.getNsURI(), PSM_Pkg);
    Resource resource = resourceSet.getResource(Constants.PSM_URI, true);
    EList<EObject> inObjects = resource.getContents();
    // Xpand
    URI outURI = URI.createURI("file:///C:/Users/...");
    Output out = new OutputImpl();
    Outlet outlet = new Outlet(outURI.toFileString());
    out.addOutlet(outlet);
    XpandExecutionContextImpl executionContext = new XpandExecutionContextImpl(out, null);
    // Configure the metamodels
    EmfMetaModel emfMetaModel = new EmfMetaModel();
    emfMetaModel.setMetaModelPackage(MyDSLlPackage.class.getName());
    executionContext.registerMetaModel(emfMetaModel);
    XpandFacade xpandFacade = XpandFacade.create(executionContext);
    Object[] params = null;
    System.out.println(inObjects.get(0));
    xpandFacade.evaluate("template::Template::main", inObjects.get(0), params);
    System.out.println("Code generated.");