def parse(self):
"""Parse the schema
:returns: A questionnaire object
:raises: A SchemaParserException if there is a problem while parsing the schema
"""
questionnaire = Questionnaire()
questionnaire.id = ParserUtils.get_required_string(
self._schema, "questionnaire_id")
questionnaire.title = ParserUtils.get_required_string(
self._schema, "title")
questionnaire.survey_id = ParserUtils.get_required_string(
self._schema, "survey_id")
logger.debug("title: " + questionnaire.title)
questionnaire.description = ParserUtils.get_optional_string(
self._schema, "description")
questionnaire.theme = ParserUtils.get_required_string(
self._schema, "theme")
questionnaire.data_version = ParserUtils.get_required_string(
self._schema, "data_version")
if "introduction" in self._schema.keys():
questionnaire.introduction = self._parse_introduction(
self._schema['introduction'])
if "groups" in self._schema.keys():
for group_schema in self._schema['groups']:
questionnaire.add_group(
self._parse_group(group_schema, questionnaire))
else:
raise SchemaParserException(
'Questionnaire must contain at least one group')
if 'messages' in self._schema.keys():
# re-use the parse validation method
self._parse_validation(questionnaire, self._schema)
questionnaire.register_aliases()
return questionnaire
