code: final Document createDocument(List<String> row, DocumentFactory documentFactory) {
      String id = StringUtils.EMPTY;
      String content = StringUtils.EMPTY;
      Language language = documentFactory.getDefaultLanguage();
      Map<AttributeType, Object> attributeMap = new HashMap<>();
  
      String idField = Config.get(configProperty, "idField").asString("ID").toUpperCase();
      String contentField = Config.get(configProperty, "contentField").asString("CONTENT").toUpperCase();
      String languageField = Config.get(configProperty, "languageField").asString("LANGUAGE").toUpperCase();
      Index<String> fields = getFieldNames();
  
      for (int i = 0; i < row.size() && i < fieldNames.size(); i++) {
        String field = row.get(i);
        String fieldName = fields.get(i);
        if (idField.equalsIgnoreCase(fieldName)) {
          id = field;
        } else if (contentField.equalsIgnoreCase(fieldName)) {
          content = field;
        } else if (languageField.equalsIgnoreCase(fieldName)) {
          language = Language.fromString(field);
        } else {
          AttributeType attributeType = AttributeType.create(fieldName);
          attributeMap.put(attributeType, attributeType.getValueType().decode(field));
        }
      }
      return documentFactory.create(id, content, language, attributeMap);
    }
docs: Create document document.
  
  @param row             the row
  @param documentFactory the document factory
  @return the document