在XTend中加载EMF模型实例 [英] Load EMF Model instance in XTend

问题描述

我正在XTend中构建代码生成器，这里我已经具有输入模型和元模型.也就是说，我使用ATL为我的XTend代码生成器生成输入模型(作为逐渐降低抽象级别的转换序列的一部分，而不是一次；这是我不使用xtext创建语法的原因)

I am building a code generator in XTend where I already have an input model and meta model. That is, I use ATL to generate the input model for my XTend code generator (as part of a transformation sequence to gradually lower the abstraction level, instead of at once; this is the reason i'm not using xtext to create the syntax).

非常清楚，我的代码生成器输入模型是XMI格式的文件，而不是xtext项目语法中的文件(甚至不使用它)！而且我认为这导致了我的问题/困惑.

So to be very clear, my input model for the code generator is a file in XMI format and NOT in the grammar of the xtext project (not even using that)! And i think this is causing me problems/confusion.

我使用现有模型创建了一个新的XText项目，右键单击.text文件，运行为，生成伪像，然后对mwe2文件执行相同的操作.

I created a new XText project using Existing models, right clicked on the .text file, run as , generate artefacts, and then i did the same for the mwe2 file.

下一步是什么，我做对了吗?如何启动我的代码生成器?所有示例均来自使用XText创建DSL的POV.我有一个EMF元模型，以及一个基于XMI的实例.如何使用XTend进一步处理该问题?

What is the next step, am I doing it right? How can I start my code generator? All the examples are from the POV that you use XText to create a DSL. I have an EMF meta model, and an XMI based instance of that. How to process that further using XTend?

任何提示或教程指南都是有帮助的.

Any hint or pointer to a tutorial is helpful.

解决方案:

该解决方案正如Sven在我接受的答案中所建议的那样，但是我还要指出，您需要使用genmodel从元模型生成Java工件.该链接显示了如何: http://www.vogella.com/articles/EclipseEMF/article. html ，请参阅第4节.这看起来似乎太合逻辑了，但是无论如何，我认为还是值得注意的.

The solution was as Sven suggested in my accepted answer, but also I would like to note that you need to use a genmodel to generate Java artifacts from your meta model. This link shows how: http://www.vogella.com/articles/EclipseEMF/article.html , see section 4. This may appear all too logical, but i think it's worth noting anyway.

推荐答案

如果您有XMI，并且只想从中生成代码，则根本不需要Xtext. 只需从Java项目开始(我将使用一个插件项目，以重用依赖关系管理)并开始编码:

If you have an XMI and just want to generate code from it, you don't need Xtext at all. Just start with a Java project (I'd use a plug-in project, to reuse the dependency management) and start coding:

import org.eclipse.emf.common.util.URI
import org.eclipse.emf.ecore.EPackage
import org.eclipse.emf.ecore.resource.Resource$Factory$Registry
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl
import org.eclipse.emf.ecore.xmi.impl.XMIResourceFactoryImpl

class MyCodeGenerator {

  def static void main(String[] args) {
    new MyCodeGenerator().generate("mymodel.xmi")
  }

  def generate(String file) {
    doEMFSetup
    val resourceSet = new ResourceSetImpl
    val resource = resourceSet.getResource(URI.createURI(file), true)
    for (content : resource.contents) {
      generateCode(content)
    }
  }

  def dispatch generateCode(MySpecialType it) '''
    public class «name» {
      «FOR member : members»
      «ENDFOR»
    }
  '''

  def dispatch generateCode(MyMember it) '''
    private «type» «name»;
    ...
  '''

  def doEMFSetup() {
//    EPackage$Registry.INSTANCE.put(MyPackage.eINSTANCE.nsURI, MyPackage.eINSTANCE)
    Resource$Factory.Registry.INSTANCE.extensionToFactoryMap.put("xmi", new XMIResourceFactoryImpl);
  }

}

您需要添加到清单中的依赖项:

The dependencies you need to add to your Manifest :

Require-Bundle: org.eclipse.xtend.lib,
 com.google.guava,
 org.eclipse.xtext.xbase.lib,
 org.eclipse.emf.common,
 org.eclipse.emf.ecore,
 org.eclipse.emf.ecore.xmi

这篇关于在XTend中加载EMF模型实例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！