@Override
  public <T extends ExtRepositoryObject> T getExtRepositoryObject(
      ExtRepositoryObjectType<T> extRepositoryObjectType,
      String extRepositoryFolderKey,
      String title)
      throws PortalException {

    try {
      StringBundler sb = new StringBundler();

      sb.append("'");
      sb.append(extRepositoryFolderKey);
      sb.append("' in parents and title contains '");
      sb.append(title);
      sb.append(" and mimeType ");

      if (extRepositoryObjectType.equals(ExtRepositoryObjectType.FOLDER)) {

        sb.append("= ");
      } else {
        sb.append("!= ");
      }

      sb.append(_FOLDER_MIME_TYPE);

      Drive drive = getDrive();

      Drive.Files driveFiles = drive.files();

      Drive.Files.List driveFilesList = driveFiles.list();

      driveFilesList.setQ(sb.toString());

      FileList fileList = driveFilesList.execute();

      List<File> files = fileList.getItems();

      if (files.isEmpty()) {
        if (extRepositoryObjectType == ExtRepositoryObjectType.FOLDER) {
          throw new NoSuchFolderException(title);
        }

        throw new NoSuchFileEntryException(title);
      }

      if (extRepositoryObjectType.equals(ExtRepositoryObjectType.FOLDER)) {

        return (T) new GoogleDriveFolder(files.get(0), getRootFolderKey());
      }

      return (T) new GoogleDriveFileEntry(files.get(0));
    } catch (IOException ioe) {
      _log.error(ioe, ioe);

      throw new SystemException(ioe);
    }
  }
  @Override
  public List<ExtRepositorySearchResult<?>> search(
      SearchContext searchContext, Query query, ExtRepositoryQueryMapper extRepositoryQueryMapper)
      throws PortalException {

    try {
      Drive drive = getDrive();

      Drive.Files driveFiles = drive.files();

      Drive.Files.List driveFilesList = driveFiles.list();

      String searchQuery =
          getSearchQuery(
              searchContext.getKeywords(), searchContext.getFolderIds(), extRepositoryQueryMapper);

      driveFilesList.setQ(searchQuery);

      FileList fileList = driveFilesList.execute();

      List<File> files = fileList.getItems();

      List<ExtRepositorySearchResult<?>> extRepositorySearchResults = new ArrayList<>(files.size());

      for (File file : files) {
        if (_FOLDER_MIME_TYPE.equals(file.getMimeType())) {
          GoogleDriveFolder googleDriveFolder = new GoogleDriveFolder(file, getRootFolderKey());

          ExtRepositorySearchResult<GoogleDriveFolder> extRepositorySearchResult =
              new ExtRepositorySearchResult<>(googleDriveFolder, 1.0f, StringPool.BLANK);

          extRepositorySearchResults.add(extRepositorySearchResult);
        } else {
          GoogleDriveFileEntry googleDriveFileEntry = new GoogleDriveFileEntry(file);

          ExtRepositorySearchResult<GoogleDriveFileEntry> extRepositorySearchResult =
              new ExtRepositorySearchResult<>(googleDriveFileEntry, 1.0f, StringPool.BLANK);

          extRepositorySearchResults.add(extRepositorySearchResult);
        }
      }

      return extRepositorySearchResults;
    } catch (IOException ioe) {
      _log.error(ioe, ioe);

      throw new SystemException(ioe);
    }
  }
  @Override
  public <T extends ExtRepositoryObject> List<T> getExtRepositoryObjects(
      ExtRepositoryObjectType<T> extRepositoryObjectType, String extRepositoryFolderKey)
      throws PortalException {

    try {
      Drive drive = getDrive();

      Drive.Files driveFiles = drive.files();

      Drive.Files.List driveFilesList = driveFiles.list();

      StringBundler sb = new StringBundler();

      if (extRepositoryFolderKey != null) {
        sb.append("'");
        sb.append(extRepositoryFolderKey);
        sb.append("' in parents and ");
      }

      if (!extRepositoryObjectType.equals(ExtRepositoryObjectType.OBJECT)) {

        sb.append("mimeType");

        if (extRepositoryObjectType.equals(ExtRepositoryObjectType.FILE)) {

          sb.append(" != '");
        } else {
          sb.append(" = '");
        }

        sb.append(_FOLDER_MIME_TYPE);
        sb.append("' and ");
      }

      sb.append("trashed = false");

      driveFilesList.setQ(sb.toString());

      FileList fileList = driveFilesList.execute();

      List<File> files = fileList.getItems();

      List<T> extRepositoryObjects = new ArrayList<>();

      GoogleDriveCache googleDriveCache = GoogleDriveCache.getInstance();

      for (File file : files) {
        if (_FOLDER_MIME_TYPE.equals(file.getMimeType())) {
          extRepositoryObjects.add((T) new GoogleDriveFolder(file, getRootFolderKey()));
        } else {
          extRepositoryObjects.add((T) new GoogleDriveFileEntry(file));
        }

        googleDriveCache.put(file);
      }

      return extRepositoryObjects;
    } catch (IOException ioe) {
      _log.error(ioe, ioe);

      throw new SystemException(ioe);
    }
  }