以编程方式调用Eclipse快速修复时出现运行时错误

我实现了一个Java插件，该插件能够使用Eclipse快速修复来修复comiper错误。要访问输入程序的最新版本，首先刷新在eclipse中打开的项目，然后调用eclipse快速修复以修复现有的编译器错误。（将对输入程序进行必要的更改，我需要首先刷新项目，然后提取最后一个版本。）实现以下代码（作为一种方法提供）以完成所描述的工作。

//Get workspace
IWorkspace workspace = ResourcesPlugin.getWorkspace(); 
IWorkspaceRoot root = workspace.getRoot();

//Get project
IProject project = root.getProject(projectName);

//Referesh the project
project.refreshLocal(IResource.DEPTH_INFINITE, null); 
IJobManager jobManager = Job.getJobManager();
jobManager.wakeUp(ResourcesPlugin.FAMILY_AUTO_BUILD);
jobManager.join(ResourcesPlugin.FAMILY_AUTO_BUILD, null);
IJavaProject javaProject = JavaCore.create(project);

//Get ICompilationUnit (classFullName is the full name of class that we need to find its compiler error)
IType iType = javaProject.findType(classFullName);
ICompilationUnit iUnit = iType.getCompilationUnit();

/** Create working copy. It is safer to work with a copy.*/
WorkingCopyOwner owner = iUnit.getOwner();
iUnit = (owner == null ? iUnit.getWorkingCopy(null) : iUnit.getWorkingCopy(owner, null)); 

//Get compilation Unit
ASTParser parser = ASTParser.newParser(AST.JLS8);
parser.setKind(ASTParser.K_COMPILATION_UNIT);
parser.setSource(iCompilationUnit);
parser.setResolveBindings(true); 
CompilationUnit cu = (CompilationUnit) parser.createAST(null);

//Get compiler error using eclipse quick fix
for (IProblem iProblem : cu.getProblems()) {

   //If it is an error
   if (iProblem.isError()) {
      int offset = iProblem.getSourceStart();
      int length = iProblem.getSourceEnd() + 1 - offset;
      IInvocationContext context = new AssistContext(iUnit , offset, length);

     ProblemLocation problem = new ProblemLocation(iProblem);

     //Extract Eclipse quick fix proposal.
     ArrayList<IJavaCompletionProposal> proposals = new ArrayList<IJavaCompletionProposal>();
     JavaCorrectionProcessor.collectCorrections(context, new IProblemLocation[] { problem }, proposals);        
 }}

最后，我们在提案变量中列出了蚀提案。该程序运行良好，直到今天我遇到了一个新的编译器错误。如果我有以下示例作为输入程序：

class Test {
   public void foo(){
      Scanner in = new Scanner(System.in);
   }
 }

当我想考虑生产线提案时，出现以下运行时错误 Scanner in = new Scanner(System.in);

!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jdt.ui". !STACK 1 Java Model Exception: Java Model Status [[Working copy] Test.java [in src [in SortExample]]] does not exist] at org.eclipse.jdt.internal.core.JavaElement.newJavaModelException(JavaElement.java:544)

我调试程序并找到方法问题发生collectCorrections类JavaCorrectionProcessor。

public static IStatus collectCorrections(IInvocationContext context, IProblemLocation[] locations, Collection<IJavaCompletionProposal> proposals) {
    ContributedProcessorDescriptor[] processors= getCorrectionProcessors();
    SafeCorrectionCollector collector= new SafeCorrectionCollector(context, proposals);
    for (int i= 0; i < processors.length; i++) {
        ContributedProcessorDescriptor curr= processors[i];
        IProblemLocation[] handled= getHandledProblems(locations, curr);
        if (handled != null) {
            collector.setProblemLocations(handled);
            collector.process(curr);
        }
    }
    return collector.getStatus();
}

重要说明：对于特定类型的编译器错误，我只会收到此错误。例如，如果在未定义i的情况下此行i = 0发生编译器错误，那么我将得到unresolve变量，程序将提出解决方案，以解决任何问题。因此，我认为刷新部分应该可以正常工作，否则对于程序中所有类型的编译器错误，我都应该得到此错误。