def create_routine_wrapper_generator(self, rdbms):
<EOL>if rdbms == '<STR_LIT>':<EOL><INDENT>module = locate('<STR_LIT>')<EOL>return module.MySqlRoutineWrapperGenerator(self.output)<EOL><DEDENT>if rdbms == '<STR_LIT>':<EOL><INDENT>module = locate('<STR_LIT>')<EOL>return module.MsSqlRoutineWrapperGenerator(self.output)<EOL><DEDENT>if rdbms == '<STR_LIT>':<EOL><INDENT>module = locate('<STR_LIT>')<EOL>return module.PgSqlRoutineWrapperGenerator(self.output)<EOL><DEDENT>raise Exception("<STR_LIT>".format(rdbms))<EOL>
Factory for creating a Constants objects (i.e. objects for generating a class with wrapper methods for calling
stored routines in a database).

:param str rdbms: The target RDBMS (i.e. mysql, mssql or pgsql).

:rtype: pystratum.RoutineWrapperGenerator.RoutineWrapperGenerator