protected EndpointConfig initReader(ObjectMapper mapper) {
    // first common config
    if (_activeView != null) {
      _reader = mapper.readerWithView(_activeView);
    } else {
      _reader = mapper.reader();
    }

    if (_rootName != null) {
      _reader = _reader.withRootName(_rootName);
    }
    // Then deser features
    if (_deserEnable != null) {
      _reader = _reader.withFeatures(_deserEnable);
    }
    if (_deserDisable != null) {
      _reader = _reader.withoutFeatures(_deserDisable);
    }
    /* Important: we are NOT to close the underlying stream after
     * mapping, so we need to instruct parser:
     */
    _reader.getJsonFactory().disable(JsonParser.Feature.AUTO_CLOSE_SOURCE);

    return this;
  }