def _validate_integer(cls, param, max_value = None, min_value = None):
try:
value = int(param)
except ValueError:
raise ValidationError(ValidationMessage.InvalidNumber.format(param))
if max_value is not None and max_value < value:
raise ValidationError(ValidationMessage.NumberTooBig.format(value))
if min_value is not None and min_value > value:
raise ValidationError(ValidationMessage.NumberTooSmall.format(value))
def validate_region(cls, parameter_pool, source):
if (parameter_pool.has(ParameterName.Region)):
region = parameter_pool.get_value(ParameterName.Region)
if region not in ServiceRegion:
raise ValidationError(ValidationMessage.InvalidRegion.\
format(region))
def _validate_string(cls, value, name):
if len(value) < 1:
raise ValidationError(ValidationMessage.EmptyString.format(name))
