[news.eclipse.platform] openEditor call inside a Job ?

["Rainer Weinhold" <weinhold@xxxxxxxxxx>]

I want to open a file in a Editor, normally the attached code do this, but 
in this case I started a Job.
And after the Job finished I want to open the Editor, but I got a 
NullPointer from getActiveWorkbenchWindow();
I also added a IJobChangeListener, and tried it in the done() Method, but 
the same effect.
Is there a other way to retriev the ActiveWorkbenchWindow ? Or can I open a 
Editor in a other way ?

run() {
    showReadme(); // Works fine

    Job job = new Job("Generate Projects") {
    protected IStatus run(IProgressMonitor monitor) {

        showReadme(); // Fails

    }
}

void showReadme() {
IFile file = (IFile) getProject().getFile("readme.txt");
IWorkbenchPage page = 
PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
try {
    IDE.openEditor(page,
        new FileEditorInput(file),
        PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(
            file.getFullPath().toString()).getId()
        );
    } catch (PartInitException e) {
    e.printStackTrace();
}
}