@Nullable
  public Object getData(String dataId) {

    if (CommonDataKeys.PROJECT.is(dataId)) {
      return editor != null ? editor.getProject() : null;
    } else if (CommonDataKeys.VIRTUAL_FILE.is(dataId)) {
      return editor != null ? editor.getFile() : null;
    } else if (CommonDataKeys.VIRTUAL_FILE_ARRAY.is(dataId)) {
      return editor != null ? new VirtualFile[] {editor.getFile()} : new VirtualFile[] {};
    } else if (CommonDataKeys.PSI_FILE.is(dataId)) {
      return getData(CommonDataKeys.PSI_ELEMENT.getName());
    } else if (CommonDataKeys.PSI_ELEMENT.is(dataId)) {
      VirtualFile file = editor != null ? editor.getFile() : null;
      return file != null && file.isValid()
          ? PsiManager.getInstance(editor.getProject()).findFile(file)
          : null;
    } else if (LangDataKeys.PSI_ELEMENT_ARRAY.is(dataId)) {
      return editor != null
          ? new PsiElement[] {(PsiElement) getData(CommonDataKeys.PSI_ELEMENT.getName())}
          : new PsiElement[] {};
    } else if (PlatformDataKeys.COPY_PROVIDER.is(dataId) && copyPasteSupport != null) {
      return this;
    } else if (PlatformDataKeys.CUT_PROVIDER.is(dataId) && copyPasteSupport != null) {
      return copyPasteSupport.getCutProvider();
    } else if (PlatformDataKeys.DELETE_ELEMENT_PROVIDER.is(dataId)) {
      return deleteProvider;
    } else if (ImageComponentDecorator.DATA_KEY.is(dataId)) {
      return editor != null ? editor : this;
    }

    return null;
  }
 public Object getData(String dataId) {
   if (CommonDataKeys.VIRTUAL_FILE_ARRAY.is(dataId)) {
     return myFileSystemTree.getSelectedFiles();
   } else if (PATH_FIELD.is(dataId)) {
     return new PathField() {
       public void toggleVisible() {
         toggleShowTextField();
       }
     };
   } else if (FileSystemTree.DATA_KEY.is(dataId)) {
     return myFileSystemTree;
   }
   return myChooserDescriptor.getUserData(dataId);
 }