org.eclipse.ui.PartInitException

org.eclipse.ui.PartInitException

org.eclipse.ui.PartInitException: Unable to open editor, unknown editor ID 错误
Eclipse3.2M6以后,Editor在plugin.xml里注册时，必须带icon参数
<extension
         id="gef.tutorial.step.ui.DiagramEditor">
      <editor
         id="gef.tutorial.step.ui.DiagramEditor"
         name="Diagram Editor"
         icon=""
         class="gef.tutorial.step.ui.DiagramEditor"
         default="false">
      </editor> 
 </extension>

在对应action中得run函数中打开编辑器.
   IEditorInput input = new DiagramEditorInput(new Path(path));
   IWorkbenchPage page = window.getActivePage();
   try {
    page.openEditor(input, DiagramEditor.ID, true);
   } catch (PartInitException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }