Getting the selected file from a context menu popup in Eclipse.

gistfile1.java

  /**
   * the command has been executed, so extract extract the needed information
   * from the application context.
   */
  public Object execute(ExecutionEvent event) throws ExecutionException {
    
    IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindowChecked(event);

    ISelectionService service = window.getSelectionService();
    IStructuredSelection structured = (IStructuredSelection) service.getSelection();
    
    Object obj = structured.getFirstElement();
    
    if (obj instanceof IAdaptable) {
      IResource res = (IResource) (((IAdaptable) obj).getAdapter(IResource.class));
      
      // You've got it!
      System.out.println(res.getLocation().toString());
    }

    return null;
  }