code: def _ProcessCompressedStreamTypes(self, mediator, path_spec, type_indicators):
      
      number_of_type_indicators = len(type_indicators)
      if number_of_type_indicators == 0:
        return
  
      self.processing_status = definitions.STATUS_INDICATOR_COLLECTING
  
      if number_of_type_indicators > 1:
        display_name = mediator.GetDisplayName()
        logger.debug((
            'Found multiple format type indicators: {0:s} for '
            'compressed stream file: {1:s}').format(
                type_indicators, display_name))
  
      for type_indicator in type_indicators:
        if type_indicator == dfvfs_definitions.TYPE_INDICATOR_BZIP2:
          compressed_stream_path_spec = path_spec_factory.Factory.NewPathSpec(
              dfvfs_definitions.TYPE_INDICATOR_COMPRESSED_STREAM,
              compression_method=dfvfs_definitions.COMPRESSION_METHOD_BZIP2,
              parent=path_spec)
  
        elif type_indicator == dfvfs_definitions.TYPE_INDICATOR_GZIP:
          compressed_stream_path_spec = path_spec_factory.Factory.NewPathSpec(
              dfvfs_definitions.TYPE_INDICATOR_GZIP, parent=path_spec)
  
        else:
          compressed_stream_path_spec = None
  
          warning_message = (
              'unsupported compressed stream format type indicators: '
              '{0:s}').format(type_indicator)
          mediator.ProduceExtractionWarning(
              warning_message, path_spec=path_spec)
  
        if compressed_stream_path_spec:
          event_source = event_sources.FileEntryEventSource(
              path_spec=compressed_stream_path_spec)
          event_source.file_entry_type = dfvfs_definitions.FILE_ENTRY_TYPE_FILE
          mediator.ProduceEventSource(event_source)
  
          self.last_activity_timestamp = time.time()
docs: Processes a data stream containing compressed stream types such as: bz2.
  
      Args:
        mediator (ParserMediator): mediates the interactions between
            parsers and other components, such as storage and abort signals.
        path_spec (dfvfs.PathSpec): path specification.
        type_indicators(list[str]): dfVFS archive type indicators found in
            the data stream.