def from_legacy(cls, schema_dict):
"""Return a Property Schema object from a legacy schema dictionary."""
# Check for fully-fledged Schema objects
if isinstance(schema_dict, cls):
return schema_dict
unknown = [k for k in schema_dict if k not in SCHEMA_KEYS]
if unknown:
raise exception.InvalidSchemaError(message=_('Unknown key(s) %s') %
unknown)
def constraints():
def get_num(key):
val = schema_dict.get(key)
if val is not None:
val = Schema.str_to_num(val)
return val
if MIN_VALUE in schema_dict or MAX_VALUE in schema_dict:
yield constr.Range(get_num(MIN_VALUE), get_num(MAX_VALUE))
if MIN_LENGTH in schema_dict or MAX_LENGTH in schema_dict:
yield constr.Length(get_num(MIN_LENGTH), get_num(MAX_LENGTH))
if ALLOWED_VALUES in schema_dict:
yield constr.AllowedValues(schema_dict[ALLOWED_VALUES])
if ALLOWED_PATTERN in schema_dict:
yield constr.AllowedPattern(schema_dict[ALLOWED_PATTERN])
try:
data_type = schema_dict[TYPE]
except KeyError:
raise exception.InvalidSchemaError(message=_('No %s specified') %
TYPE)
if SCHEMA in schema_dict:
if data_type == Schema.LIST:
ss = cls.from_legacy(schema_dict[SCHEMA])
elif data_type == Schema.MAP:
schema_dicts = schema_dict[SCHEMA].items()
ss = dict((n, cls.from_legacy(sd)) for n, sd in schema_dicts)
else:
raise exception.InvalidSchemaError(
message=_('%(schema)s supplied for %(type)s %(data)s') %
dict(schema=SCHEMA, type=TYPE, data=data_type))
else:
ss = None
return cls(data_type,
description=schema_dict.get(DESCRIPTION),
default=schema_dict.get(DEFAULT),
schema=ss,
required=schema_dict.get(REQUIRED, False),
constraints=list(constraints()),
implemented=schema_dict.get(IMPLEMENTED, True),
update_allowed=schema_dict.get(UPDATE_ALLOWED, False),
immutable=schema_dict.get(IMMUTABLE, False))
def _check_dict(schema_dict, allowed_keys, entity):
if not isinstance(schema_dict, dict):
raise exception.InvalidSchemaError(
message=_("Invalid %s, expected a mapping") % entity)
for key in schema_dict:
if key not in allowed_keys:
raise exception.InvalidSchemaError(
message=_("Invalid key '%(key)s' for %(entity)s") % {
"key": key,
"entity": entity
})
def __init__(self, min=None, max=None, description=None):
if min is max is None:
raise exception.InvalidSchemaError(
message=_('A length constraint must have a min value and/or '
'a max value specified.'))
super(Length, self).__init__(min, max, description)
for param in (min, max):
if not isinstance(param, (six.integer_types, type(None))):
msg = _('min/max length must be integral')
raise exception.InvalidSchemaError(message=msg)
def __init__(self, min=None, max=None, description=None):
super(Range, self).__init__(description)
self.min = min
self.max = max
for param in (min, max):
if not isinstance(param, (float, six.integer_types, type(None))):
raise exception.InvalidSchemaError(
message=_('min/max must be numeric'))
if min is max is None:
raise exception.InvalidSchemaError(
message=_('A range constraint must have a min value and/or '
'a max value specified.'))
def validate(self, validate_value=True, context=None):
"""Validates the parameter.
This method validates if the parameter's schema is valid,
and if the default value - if present - or the user-provided
value for the parameter comply with the schema.
"""
err_msg = _("Parameter '%(name)s' is invalid: %(exp)s")
try:
self.schema.validate(context)
if not validate_value:
return
if self.user_value is not None:
self._validate(self.user_value, context)
elif self.has_default():
self._validate(self.default(), context)
else:
raise exception.UserParameterMissing(key=self.name)
except exception.StackValidationFailed as ex:
msg = err_msg % dict(name=self.name, exp=six.text_type(ex))
raise exception.StackValidationFailed(message=msg)
except exception.InvalidSchemaError as ex:
msg = err_msg % dict(name=self.name, exp=six.text_type(ex))
raise exception.InvalidSchemaError(message=msg)
def __init__(self, pattern, description=None):
super(AllowedPattern, self).__init__(description)
if not isinstance(pattern, six.string_types):
raise exception.InvalidSchemaError(
message=_('AllowedPattern must be a string'))
self.pattern = pattern
self.match = re.compile(pattern).match
def __init__(self, allowed, description=None):
super(AllowedValues, self).__init__(description)
if (not isinstance(allowed, collections.Sequence)
or isinstance(allowed, six.string_types)):
raise exception.InvalidSchemaError(
message=_('AllowedValues must be a list'))
self.allowed = tuple(allowed)
def _validate_dict(cls, param_name, schema_dict):
cls._check_dict(schema_dict, cls.PARAMETER_KEYS,
"parameter (%s)" % param_name)
if cls.TYPE not in schema_dict:
raise exception.InvalidSchemaError(
message=_("Missing parameter type for parameter: %s") %
param_name)
def validate_with_client(self, client, resource_id):
if self.resource_client_name and self.resource_getter_name:
getattr(client.client_plugin(self.resource_client_name),
self.resource_getter_name)(resource_id)
else:
raise exception.InvalidSchemaError(
message=_('Client name and resource getter name must be '
'specified.'))
def _validate_default(self, context):
if self.default is not None:
try:
self.validate_constraints(self.default, context,
[CustomConstraint])
except (ValueError, TypeError) as exc:
raise exception.InvalidSchemaError(
message=_('Invalid default %(default)s (%(exc)s)') %
dict(default=self.default, exc=exc))
def __init__(self,
data_type,
description=None,
default=None,
schema=None,
required=False,
constraints=None,
label=None,
immutable=False):
self._len = None
self.label = label
self.type = data_type
if self.type not in self.TYPES:
raise exception.InvalidSchemaError(message=_('Invalid type (%s)') %
self.type)
if required and default is not None:
LOG.warning(
_LW("Option 'required=True' should not be used with "
"any 'default' value (%s)") % default)
self.description = description
self.required = required
self.immutable = immutable
if isinstance(schema, type(self)):
if self.type != self.LIST:
msg = _('Single schema valid only for '
'%(ltype)s, not %(utype)s') % dict(ltype=self.LIST,
utype=self.type)
raise exception.InvalidSchemaError(message=msg)
self.schema = AnyIndexDict(schema)
else:
self.schema = schema
if self.schema is not None and self.type not in (self.LIST, self.MAP):
msg = _('Schema valid only for %(ltype)s or '
'%(mtype)s, not %(utype)s') % dict(
ltype=self.LIST, mtype=self.MAP, utype=self.type)
raise exception.InvalidSchemaError(message=msg)
self.constraints = constraints or []
self.default = default
def _validate_default(self, context):
if self.default is not None:
default_value = self.default
if self.type == self.LIST and not isinstance(self.default, list):
try:
default_value = self.default.split(',')
except (KeyError, AttributeError) as err:
raise exception.InvalidSchemaError(
message=_('Default must be a comma-delimited list '
'string: %s') % err)
elif self.type == self.LIST and isinstance(self.default, list):
default_value = [(six.text_type(x)) for x in self.default]
try:
self.validate_constraints(default_value, context,
[constr.CustomConstraint])
except (ValueError, TypeError,
exception.StackValidationFailed) as exc:
raise exception.InvalidSchemaError(
message=_('Invalid default %(default)s (%(exc)s)') %
dict(default=self.default, exc=exc))
def constraints():
constraints = schema_dict.get(cls.CONSTRAINTS)
if constraints is None:
return
if not isinstance(constraints, list):
raise exception.InvalidSchemaError(
message=_("Invalid parameter constraints for parameter "
"%s, expected a list") % param_name)
for constraint in constraints:
cls._check_dict(constraint, PARAM_CONSTRAINTS,
'parameter constraints')
desc = constraint.get(DESCRIPTION)
if RANGE in constraint:
cdef = constraint.get(RANGE)
cls._check_dict(cdef, RANGE_KEYS, 'range constraint')
yield constr.Range(parameters.Schema.get_num(MIN, cdef),
parameters.Schema.get_num(MAX, cdef),
desc)
elif LENGTH in constraint:
cdef = constraint.get(LENGTH)
cls._check_dict(cdef, RANGE_KEYS, 'length constraint')
yield constr.Length(parameters.Schema.get_num(MIN, cdef),
parameters.Schema.get_num(MAX, cdef),
desc)
elif ALLOWED_VALUES in constraint:
cdef = constraint.get(ALLOWED_VALUES)
yield constr.AllowedValues(cdef, desc)
elif ALLOWED_PATTERN in constraint:
cdef = constraint.get(ALLOWED_PATTERN)
yield constr.AllowedPattern(cdef, desc)
elif CUSTOM_CONSTRAINT in constraint:
cdef = constraint.get(CUSTOM_CONSTRAINT)
yield constr.CustomConstraint(cdef, desc)
else:
raise exception.InvalidSchemaError(
message=_("No constraint expressed"))
def validate(self, with_value=True):
try:
for key in self.data:
if key not in self.props:
msg = _("Unknown Property %s") % key
raise exception.StackValidationFailed(message=msg)
for (key, prop) in self.props.items():
# check that update_allowed and immutable
# do not contradict each other
if prop.update_allowed() and prop.immutable():
msg = _("Property %(prop)s: %(ua)s and %(im)s "
"cannot both be True") % {
'prop': key,
'ua': prop.schema.UPDATE_ALLOWED,
'im': prop.schema.IMMUTABLE
}
raise exception.InvalidSchemaError(message=msg)
if with_value:
try:
self._get_property_value(key, validate=True)
except exception.StackValidationFailed as ex:
path = [key]
path.extend(ex.path)
raise exception.StackValidationFailed(
path=path, message=ex.error_message)
except ValueError as e:
if prop.required() and key not in self.data:
path = []
else:
path = [key]
raise exception.StackValidationFailed(
path=path, message=six.text_type(e))
# are there unimplemented Properties
if not prop.implemented() and key in self.data:
msg = _("Property %s not implemented yet") % key
raise exception.StackValidationFailed(message=msg)
except exception.StackValidationFailed as ex:
# NOTE(prazumovsky): should reraise exception for adding specific
# error name and error_prefix to path for correct error message
# building.
path = self.error_prefix
path.extend(ex.path)
raise exception.StackValidationFailed(error=ex.error
or 'Property error',
path=path,
message=ex.error_message)
def validate(self, context=None):
"""Validates the schema.
This method checks if the schema itself is valid, and if the
default value - if present - complies to the schema's constraints.
"""
for c in self.constraints:
if not self._is_valid_constraint(c):
err_msg = _('%(name)s constraint '
'invalid for %(utype)s') % dict(
name=type(c).__name__, utype=self.type)
raise exception.InvalidSchemaError(message=err_msg)
self._validate_default(context)
# validated nested schema(ta)
if self.schema:
if isinstance(self.schema, AnyIndexDict):
self.schema.value.validate(context)
else:
for nested_schema in six.itervalues(self.schema):
nested_schema.validate(context)