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# Copyright 2012 OpenStack Foundation.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import jsonschema
from oslo_utils import encodeutils
from glance.common import exception
from glance.i18n import _
class Schema(object):
def __init__(self, name, properties=None, links=None, required=None,
definitions=None):
self.name = name
if properties is None:
properties = {}
self.properties = properties
self.links = links
self.required = required
self.definitions = definitions
def validate(self, obj):
try:
jsonschema.validate(obj, self.raw())
except jsonschema.ValidationError as e:
reason = encodeutils.exception_to_unicode(e)
raise exception.InvalidObject(schema=self.name, reason=reason)
def filter(self, obj):
filtered = {}
for key, value in obj.items():
if self._filter_func(self.properties, key):
filtered[key] = value
# NOTE(flaper87): This exists to allow for v1, null properties,
# to be used with the V2 API. During Kilo, it was allowed for the
# later to return None values without considering that V1 allowed
# for custom properties to be None, which is something V2 doesn't
# allow for. This small hack here will set V1 custom `None` pro-
# perties to an empty string so that they will be updated along
# with the image (if an update happens).
#
# We could skip the properties that are `None` but that would bring
# back the behavior we moved away from. Note that we can't consider
# doing a schema migration because we don't know which properties
# are "custom" and which came from `schema-image` if those custom
# properties were created with v1.
if key not in self.properties and value is None:
filtered[key] = ''
return filtered
@staticmethod
def _filter_func(properties, key):
return key in properties
def merge_properties(self, properties):
# Ensure custom props aren't attempting to override base props
original_keys = set(self.properties.keys())
new_keys = set(properties.keys())
intersecting_keys = original_keys.intersection(new_keys)
conflicting_keys = [k for k in intersecting_keys
if self.properties[k] != properties[k]]
if conflicting_keys:
props = ', '.join(conflicting_keys)
reason = _("custom properties (%(props)s) conflict "
"with base properties")
raise exception.SchemaLoadError(reason=reason % {'props': props})
self.properties.update(properties)
def raw(self):
raw = {
'name': self.name,
'properties': self.properties,
'additionalProperties': False,
}
if self.definitions:
raw['definitions'] = self.definitions
if self.required:
raw['required'] = self.required
if self.links:
raw['links'] = self.links
return raw
def minimal(self):
minimal = {
'name': self.name,
'properties': self.properties
}
if self.definitions:
minimal['definitions'] = self.definitions
if self.required:
minimal['required'] = self.required
return minimal
class PermissiveSchema(Schema):
@staticmethod
def _filter_func(properties, key):
return True
def raw(self):
raw = super(PermissiveSchema, self).raw()
raw['additionalProperties'] = {'type': 'string'}
return raw
def minimal(self):
minimal = super(PermissiveSchema, self).raw()
return minimal
class CollectionSchema(object):
def __init__(self, name, item_schema):
self.name = name
self.item_schema = item_schema
def raw(self):
definitions = None
if self.item_schema.definitions:
definitions = self.item_schema.definitions
self.item_schema.definitions = None
raw = {
'name': self.name,
'properties': {
self.name: {
'type': 'array',
'items': self.item_schema.raw(),
},
'first': {'type': 'string'},
'next': {'type': 'string'},
'schema': {'type': 'string'},
},
'links': [
{'rel': 'first', 'href': '{first}'},
{'rel': 'next', 'href': '{next}'},
{'rel': 'describedby', 'href': '{schema}'},
],
}
if definitions:
raw['definitions'] = definitions
self.item_schema.definitions = definitions
return raw
def minimal(self):
definitions = None
if self.item_schema.definitions:
definitions = self.item_schema.definitions
self.item_schema.definitions = None
minimal = {
'name': self.name,
'properties': {
self.name: {
'type': 'array',
'items': self.item_schema.minimal(),
},
'schema': {'type': 'string'},
},
'links': [
{'rel': 'describedby', 'href': '{schema}'},
],
}
if definitions:
minimal['definitions'] = definitions
self.item_schema.definitions = definitions
return minimal
class DictCollectionSchema(Schema):
def __init__(self, name, item_schema):
self.name = name
self.item_schema = item_schema
def raw(self):
definitions = None
if self.item_schema.definitions:
definitions = self.item_schema.definitions
self.item_schema.definitions = None
raw = {
'name': self.name,
'properties': {
self.name: {
'type': 'object',
'additionalProperties': self.item_schema.raw(),
},
'first': {'type': 'string'},
'next': {'type': 'string'},
'schema': {'type': 'string'},
},
'links': [
{'rel': 'first', 'href': '{first}'},
{'rel': 'next', 'href': '{next}'},
{'rel': 'describedby', 'href': '{schema}'},
],
}
if definitions:
raw['definitions'] = definitions
self.item_schema.definitions = definitions
return raw
def minimal(self):
definitions = None
if self.item_schema.definitions:
definitions = self.item_schema.definitions
self.item_schema.definitions = None
minimal = {
'name': self.name,
'properties': {
self.name: {
'type': 'object',
'additionalProperties': self.item_schema.minimal(),
},
'schema': {'type': 'string'},
},
'links': [
{'rel': 'describedby', 'href': '{schema}'},
],
}
if definitions:
minimal['definitions'] = definitions
self.item_schema.definitions = definitions
return minimal
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