无法获取ITranslationUnit在Eclipse插件中创建C文件的AST

问题描述

我正在通过工作区中生成的项目的C-File生成一个具有CDT Eclipse Framework帮助的AST。但是每次我尝试通过

$ pre> ITranslationUnit tu =（ITranslationUnit）ice;

ice and tu为null，我收到以下错误

  java.lang.NullPointerException 
在org.eclipse.cdt.internal.core.pdom.TeamPDOMImportOperation.expandLocation（TeamPDOMImportOperation.java:135）
在org.eclipse.cdt.internal.core.pdom.TeamPDOMImportOperation.getImportLocation（TeamPDOMImportOperation.java:126）
在org.eclipse.cdt.internal.core.pdom.TeamPDOMImportOperation.run（TeamPDOMImportOperation.java:92） 
在org.eclipse.cdt.internal.core.pdom.PDOMManager.createIndexer（PDOMManager.java:600）
在org.eclipse.cdt.internal.core.pdom.PDOMSetupJob.run（PDOMSetupJob。 java：58）
在org.eclipse.core.internal.jobs.Worker.run（Worker.java:54）
  

我有一个Eclipse插件，它实现了IApplication扩展。在运行方法我有以下代码。

  IProgressMonitor progressMonitor = new NullProgressMonitor（）; 
 IWorkspaceRoot root = ResourcesPlugin.getWorkspace（）。getRoot（）; 
 IProject project = root.getProject（NewProject）; 
 try {
 if（project.exists（））{
 if（project.isOpen（））
 project.close（null）; 
 project.delete（false，false，progressMonitor）; 
 project.create（progressMonitor）; 
 project.open（progressMonitor）; 
} 
 else {
 project.create（progressMonitor）; 
 project.open（progressMonitor）; 
} 
 
 if（！project.isNatureEnabled（org.eclipse.cdt.core.CProjectNature.C_NATURE_ID））{
 CProjectNature.addCNature（project，null）; 
} 
 
 project.close（null）; 
 project.open（null）; 
 
} catch（CoreException e1）{
 e1.printStackTrace（）; 
} 
 
 IFile file = project.getFile（stub.c）; 
 try {
 IPath workspacerawlocation = ResourcesPlugin.getWorkspace（）。getRoot（）。getRawLocation（）; 
 FileInputStream fileStream = new FileInputStream（workspacerawlocation.append（stub.h）。toString（））; 
 if（！file.exists（））
 file.create（fileStream，false，null）; 
 
 ICElement ice = CoreModel.getDefault（）。create（file）; 
 if（ice == null）
 System.out.println（ice is null）; 
 ITranslationUnit tu =（ITranslationUnit）ice; 
 if（tu == null）{
 System.out.println（tu is null）; 
} 
 else {
 IASTTranslationUnit ast = tu.getAST（）; 
} 
 
} catch（CoreException e）{
 // TODO自动生成的catch块
 e.printStackTrace（）; 
} catch（FileNotFoundException e）{
 // TODO自动生成的catch块
 e.printStackTrace（）; 
} 
} 
  

有人可以帮忙吗？我是否想念一些插件依赖或初始化？

解决方案

跟随我的评论：为了做一些代码操作，你必须使CDT索引器按照C Model / AST所要求的工作。我建议创建C项目配置的两种可能方法：

1]查看。这些项目包含非常简单的.cproject配置，但可能需要对您的需求进行某些更改。

2]将C程序从工作C项目保存到某处，并在创建项目，只需将其复制。您可能需要刷新项目，或关闭/重新打开它，以便CDT重新加载配置。

I'm trying to generate an AST with help of the CDT Eclipse Framework from an C-File of a generated project in my workspace. But every time i try to get an TranslationUnit through

ICElement ice = CoreModel.getDefault().create(file);
ITranslationUnit tu= (ITranslationUnit) ice;

ice and tu are null and i get the following error

java.lang.NullPointerException
at org.eclipse.cdt.internal.core.pdom.TeamPDOMImportOperation.expandLocation(TeamPDOMImportOperation.java:135)
at org.eclipse.cdt.internal.core.pdom.TeamPDOMImportOperation.getImportLocation(TeamPDOMImportOperation.java:126)
at org.eclipse.cdt.internal.core.pdom.TeamPDOMImportOperation.run(TeamPDOMImportOperation.java:92)
at org.eclipse.cdt.internal.core.pdom.PDOMManager.createIndexer(PDOMManager.java:600)
at org.eclipse.cdt.internal.core.pdom.PDOMSetupJob.run(PDOMSetupJob.java:58)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

I have an Eclipse Plugin which implements an IApplication extension. In the run Method i have following code.

    IProgressMonitor progressMonitor = new NullProgressMonitor();
    IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
    IProject project = root.getProject("NewProject");
    try {
        if(project.exists()){
            if(project.isOpen())
                project.close(null);
            project.delete(false, false, progressMonitor);
            project.create(progressMonitor);
            project.open(progressMonitor);
        }
        else{
            project.create(progressMonitor);
            project.open(progressMonitor);
        }           

        if(!project.isNatureEnabled(org.eclipse.cdt.core.CProjectNature.C_NATURE_ID)){
            CProjectNature.addCNature(project, null);
        }

        project.close(null);
        project.open(null);

    } catch (CoreException e1) {
        e1.printStackTrace();
    }

    IFile file = project.getFile("stub.c");           
    try {
        IPath workspacerawlocation = ResourcesPlugin.getWorkspace().getRoot().getRawLocation();
        FileInputStream fileStream = new FileInputStream(workspacerawlocation.append("stub.h").toString());
        if(!file.exists())
            file.create(fileStream, false, null);

        ICElement ice = CoreModel.getDefault().create(file);
        if(ice == null)
            System.out.println("ice is null");
        ITranslationUnit tu= (ITranslationUnit) ice;
        if(tu == null){
            System.out.println("tu is null");
        }
        else{
            IASTTranslationUnit ast =  tu.getAST();
        }

    } catch (CoreException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }       
}

Can anyone help? Did i miss some Plugin-dependencies or initializations?

解决方案

Following up to my comment: in order to do some code manipulation, you have to have the CDT indexer working as it is required by C Model/AST. I suggest two possible ways of creating a C project configuration:

1] Look here for list of tests in org.eclipse.cdt.core.tests which create CDT projects. These projects contain very simple .cproject configuration, but some alterations to your needs might be required.

2] Save a .cproject from a working C project somewhere and when creating your projects, just copy it into. You may need to refresh the project somehow or close/reopen it so that CDT reloads the configuration.

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