如何访问当前Project？？？

【转】http://wiki.eclipse.org/FAQ_How_do_I_access_the_active_project%3F

作为新手，好多人会问：如果获取Active Project、Active File、and active folder。事实上，在eclipse中不存在“Active”Project 和File；只有当前的（currently）project和file。
那么如果获取呢?下面介绍常用的方式：
1.通过UI的ISelectionService获取project、file、folder
一但你获取了一个selection，你就可以获取选择的resource

IResource extractSelection(ISelection sel) {
      if (!(sel instanceof IStructuredSelection))
         return null;
      IStructuredSelection ss = (IStructuredSelection) sel;
      Object element = ss.getFirstElement();
      if (element instanceof IResource)
         return (IResource) element;
      if (!(element instanceof IAdaptable))
         return null;
      IAdaptable adaptable = (IAdaptable)element;
      Object adapter = adaptable.getAdapter(IResource.class);
      return (IResource) adapter;
   }

 2.通过IPartService获取resource

IResource extractResource(IEditorPart editor) {
      IEditorInput input = editor.getInput();
      if (!(input instanceof IFileEditorInput))
         return null;
      return ((IFileEditorInput)input).getFile();
   }

 3.IResource.getProject()

题外话，对于project、file等resource，我们通常说“selected”；对于编辑器、视图，我们通常说“Active”
 

IWorkbench iworkbench = PlatformUI.getWorkbench();
 if (iworkbench == null)...
 IWorkbenchWindow iworkbenchwindow = iworkbench.getActiveWorkbenchWindow();
 if (iworkbenchwindow == null) ...
 IWorkbenchPage iworkbenchpage = iworkbenchwindow.getActivePage();
 if (iworkbenchpage == null) ...
 IEditorPart ieditorpart = iworkbenchpage.getActiveEditor();
 

  IStructuredSelection
  ITextSelection
 

IWorkbench iworkbench = PlatformUI.getWorkbench();
 if (iworkbench == null)...
 IWorkbenchWindow iworkbenchwindow = iworkbench.getActiveWorkbenchWindow();
 if (iworkbenchwindow == null) ...
 IWorkbenchPage iworkbenchpage = iworkbenchwindow.getActivePage();
 if (iworkbenchpage == null) ...
 IEditorPart ieditorpart = iworkbenchpage.getActiveEditor();