code: public DescriptorRepository readDescriptorRepository(String fileName)
      {
          try
          {
              RepositoryPersistor persistor = new RepositoryPersistor();
              return persistor.readDescriptorRepository(fileName);
          }
          catch (Exception e)
          {
              throw new MetadataException("Can not read repository " + fileName, e);
          }
      }
docs: Read ClassDescriptors from the given repository file.
  @see #mergeDescriptorRepository