def to_number(self, param, value):
# convert "11m:15s" to 675
if (not Unit.is_defined(param)):
#raise Exception("Unit for the given parameter %s has not been defined" % (param))
raise InvalidParamException(param)
if (self.param_formatters.has_key(param)):
f = self.param_formatters[param]
v = f(param, value)
else:
raise Exception("Unknown parameter %s in ParamFormatter" % (param))
return v
