657 lines
26 KiB
Python
657 lines
26 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import collections
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from oslo_serialization import jsonutils
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import six
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from heat.common import exception
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from heat.common.i18n import _
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from heat.common import param_utils
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from heat.engine import constraints as constr
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from heat.engine import function
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from heat.engine.hot import parameters as hot_param
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from heat.engine import parameters
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from heat.engine import support
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from heat.engine import translation as trans
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SCHEMA_KEYS = (
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REQUIRED, IMPLEMENTED, DEFAULT, TYPE, SCHEMA,
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ALLOWED_PATTERN, MIN_VALUE, MAX_VALUE, ALLOWED_VALUES,
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MIN_LENGTH, MAX_LENGTH, DESCRIPTION, UPDATE_ALLOWED,
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IMMUTABLE,
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) = (
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'Required', 'Implemented', 'Default', 'Type', 'Schema',
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'AllowedPattern', 'MinValue', 'MaxValue', 'AllowedValues',
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'MinLength', 'MaxLength', 'Description', 'UpdateAllowed',
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'Immutable',
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)
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class Schema(constr.Schema):
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"""Schema class for validating resource properties.
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This class is used for defining schema constraints for resource properties.
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It inherits generic validation features from the base Schema class and add
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processing that is specific to resource properties.
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"""
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KEYS = (
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TYPE, DESCRIPTION, DEFAULT, SCHEMA, REQUIRED, CONSTRAINTS,
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UPDATE_ALLOWED, IMMUTABLE,
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) = (
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'type', 'description', 'default', 'schema', 'required', 'constraints',
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'update_allowed', 'immutable',
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)
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def __init__(self, data_type, description=None,
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default=None, schema=None,
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required=False, constraints=None,
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implemented=True,
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update_allowed=False,
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immutable=False,
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support_status=support.SupportStatus(),
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allow_conversion=False):
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super(Schema, self).__init__(data_type, description, default,
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schema, required, constraints,
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immutable=immutable)
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self.implemented = implemented
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self.update_allowed = update_allowed
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self.support_status = support_status
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self.allow_conversion = allow_conversion
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# validate structural correctness of schema itself
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self.validate()
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def validate(self, context=None):
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super(Schema, self).validate()
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# check that update_allowed and immutable
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# do not contradict each other
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if self.update_allowed and self.immutable:
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msg = _("Options %(ua)s and %(im)s "
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"cannot both be True") % {
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'ua': UPDATE_ALLOWED,
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'im': IMMUTABLE}
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raise exception.InvalidSchemaError(message=msg)
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@classmethod
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def from_legacy(cls, schema_dict):
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"""Return a Property Schema object from a legacy schema dictionary."""
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# Check for fully-fledged Schema objects
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if isinstance(schema_dict, cls):
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return schema_dict
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unknown = [k for k in schema_dict if k not in SCHEMA_KEYS]
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if unknown:
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raise exception.InvalidSchemaError(
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message=_('Unknown key(s) %s') % unknown)
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def constraints():
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def get_num(key):
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val = schema_dict.get(key)
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if val is not None:
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val = Schema.str_to_num(val)
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return val
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if MIN_VALUE in schema_dict or MAX_VALUE in schema_dict:
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yield constr.Range(get_num(MIN_VALUE), get_num(MAX_VALUE))
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if MIN_LENGTH in schema_dict or MAX_LENGTH in schema_dict:
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yield constr.Length(get_num(MIN_LENGTH), get_num(MAX_LENGTH))
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if ALLOWED_VALUES in schema_dict:
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yield constr.AllowedValues(schema_dict[ALLOWED_VALUES])
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if ALLOWED_PATTERN in schema_dict:
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yield constr.AllowedPattern(schema_dict[ALLOWED_PATTERN])
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try:
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data_type = schema_dict[TYPE]
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except KeyError:
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raise exception.InvalidSchemaError(
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message=_('No %s specified') % TYPE)
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if SCHEMA in schema_dict:
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if data_type == Schema.LIST:
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ss = cls.from_legacy(schema_dict[SCHEMA])
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elif data_type == Schema.MAP:
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schema_dicts = schema_dict[SCHEMA].items()
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ss = dict((n, cls.from_legacy(sd)) for n, sd in schema_dicts)
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else:
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raise exception.InvalidSchemaError(
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message=_('%(schema)s supplied for %(type)s %(data)s') %
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dict(schema=SCHEMA, type=TYPE, data=data_type))
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else:
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ss = None
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return cls(data_type,
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description=schema_dict.get(DESCRIPTION),
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default=schema_dict.get(DEFAULT),
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schema=ss,
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required=schema_dict.get(REQUIRED, False),
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constraints=list(constraints()),
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implemented=schema_dict.get(IMPLEMENTED, True),
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update_allowed=schema_dict.get(UPDATE_ALLOWED, False),
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immutable=schema_dict.get(IMMUTABLE, False))
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@classmethod
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def from_parameter(cls, param):
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"""Return a Property Schema corresponding to a Parameter Schema.
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Convert a parameter schema from a provider template to a property
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Schema for the corresponding resource facade.
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"""
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# map param types to property types
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param_type_map = {
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param.STRING: cls.STRING,
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param.NUMBER: cls.NUMBER,
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param.LIST: cls.LIST,
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param.MAP: cls.MAP,
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param.BOOLEAN: cls.BOOLEAN
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}
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# allow_conversion allows slightly more flexible type conversion
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# where property->parameter types don't align, primarily when
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# a json parameter value is passed via a Map property, which requires
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# some coercion to pass strings or lists (which are both valid for
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# Json parameters but not for Map properties).
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allow_conversion = (param.type == param.MAP
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or param.type == param.LIST)
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# make update_allowed true by default on TemplateResources
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# as the template should deal with this.
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return cls(data_type=param_type_map.get(param.type, cls.MAP),
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description=param.description,
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required=param.required,
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constraints=param.constraints,
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update_allowed=True,
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immutable=False,
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allow_conversion=allow_conversion)
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def allowed_param_prop_type(self):
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"""Return allowed type of Property Schema converted from parameter.
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Especially, when generating Schema from parameter, Integer Property
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Schema will be supplied by Number parameter.
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"""
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param_type_map = {
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self.INTEGER: self.NUMBER,
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self.STRING: self.STRING,
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self.NUMBER: self.NUMBER,
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self.BOOLEAN: self.BOOLEAN,
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self.LIST: self.LIST,
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self.MAP: self.MAP
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}
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return param_type_map[self.type]
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def __getitem__(self, key):
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if key == self.UPDATE_ALLOWED:
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return self.update_allowed
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elif key == self.IMMUTABLE:
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return self.immutable
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else:
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return super(Schema, self).__getitem__(key)
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def schemata(schema_dicts):
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"""Return dictionary of Schema objects for given dictionary of schemata.
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The input schemata are converted from the legacy (dictionary-based)
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format to Schema objects where necessary.
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"""
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return dict((n, Schema.from_legacy(s)) for n, s in schema_dicts.items())
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class Property(object):
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def __init__(self, schema, name=None, context=None, path=None):
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self.schema = Schema.from_legacy(schema)
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self.name = name
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self.context = context
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self.path = self.make_path(name, path)
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def required(self):
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return self.schema.required
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def implemented(self):
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return self.schema.implemented
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def update_allowed(self):
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return self.schema.update_allowed
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def immutable(self):
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return self.schema.immutable
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def has_default(self):
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return self.schema.default is not None
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def default(self):
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return self.schema.default
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def type(self):
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return self.schema.type
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def support_status(self):
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return self.schema.support_status
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def make_path(self, name, path=None):
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if path is None:
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path = ''
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if name is None:
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name = ''
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if isinstance(name, int) or name.isdigit():
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name = str(name)
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delim = '' if not path or path.endswith('.') else '.'
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return delim.join([path, name])
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def _get_integer(self, value):
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if value is None:
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value = self.has_default() and self.default() or 0
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try:
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value = int(value)
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except ValueError:
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raise TypeError(_("Value '%s' is not an integer") % value)
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else:
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return value
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def _get_number(self, value):
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if value is None:
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value = self.has_default() and self.default() or 0
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return Schema.str_to_num(value)
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def _get_string(self, value):
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if value is None:
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value = self.has_default() and self.default() or ''
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if not isinstance(value, six.string_types):
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if isinstance(value, (bool, int)):
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value = six.text_type(value)
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else:
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raise ValueError(_('Value must be a string; got %r') % value)
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return value
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def _get_children(self, child_values, keys=None, validate=False,
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translation=None):
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if self.schema.schema is not None:
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if keys is None:
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keys = list(self.schema.schema)
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schemata = dict((k, self.schema.schema[k]) for k in keys)
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properties = Properties(schemata, dict(child_values),
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context=self.context,
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parent_name=self.path,
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translation=translation)
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if validate:
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properties.validate()
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return ((k, properties[k]) for k in keys)
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else:
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return child_values
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def _get_map(self, value, validate=False, translation=None):
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if value is None:
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value = self.default() if self.has_default() else {}
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if not isinstance(value, collections.Mapping):
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# This is to handle passing Lists via Json parameters exposed
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# via a provider resource, in particular lists-of-dicts which
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# cannot be handled correctly via comma_delimited_list
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if self.schema.allow_conversion:
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if isinstance(value, six.string_types):
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return value
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elif isinstance(value, collections.Sequence):
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return jsonutils.dumps(value)
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raise TypeError(_('"%s" is not a map') % value)
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return dict(self._get_children(six.iteritems(value),
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validate=validate,
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translation=translation))
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def _get_list(self, value, validate=False, translation=None):
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if value is None:
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value = self.has_default() and self.default() or []
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if self.schema.allow_conversion and isinstance(value,
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six.string_types):
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value = param_utils.delim_string_to_list(value)
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if (not isinstance(value, collections.Sequence) or
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isinstance(value, six.string_types)):
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raise TypeError(_('"%s" is not a list') % repr(value))
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return [v[1] for v in self._get_children(enumerate(value),
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range(len(value)),
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validate=validate,
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translation=translation)]
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def _get_bool(self, value):
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"""Get value for boolean property.
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Explicitly checking for bool, or string with lower value
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"true" or "false", to avoid integer values.
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"""
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if value is None:
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value = self.has_default() and self.default() or False
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if isinstance(value, bool):
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return value
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if isinstance(value, six.string_types):
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normalised = value.lower()
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if normalised not in ['true', 'false']:
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raise ValueError(_('"%s" is not a valid boolean') % normalised)
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return normalised == 'true'
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raise TypeError(_('"%s" is not a valid boolean') % value)
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def get_value(self, value, validate=False, translation=None):
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"""Get value from raw value and sanitize according to data type."""
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t = self.type()
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if t == Schema.STRING:
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_value = self._get_string(value)
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elif t == Schema.INTEGER:
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_value = self._get_integer(value)
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elif t == Schema.NUMBER:
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_value = self._get_number(value)
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elif t == Schema.MAP:
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_value = self._get_map(value, validate, translation)
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elif t == Schema.LIST:
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_value = self._get_list(value, validate, translation)
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elif t == Schema.BOOLEAN:
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_value = self._get_bool(value)
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elif t == Schema.ANY:
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_value = value
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if validate:
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self.schema.validate_constraints(_value, self.context)
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return _value
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class Properties(collections.Mapping):
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def __init__(self, schema, data, resolver=lambda d: d, parent_name=None,
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context=None, section=None, translation=None):
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self.props = dict((k, Property(s, k, context, path=parent_name))
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for k, s in schema.items())
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self.resolve = resolver
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self.data = data
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self.error_prefix = [section] if section is not None else []
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self.parent_name = parent_name
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self.context = context
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self.translation = (trans.Translation(properties=self)
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if translation is None else translation)
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def update_translation(self, rules, client_resolve=True):
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self.translation.set_rules(rules, client_resolve=client_resolve)
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@staticmethod
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def schema_from_params(params_snippet):
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"""Create properties schema from the parameters section of a template.
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:param params_snippet: parameter definition from a template
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:returns: equivalent properties schemata for the specified parameters
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"""
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if params_snippet:
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return dict((n, Schema.from_parameter(p)) for n, p
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in params_snippet.items())
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return {}
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def validate(self, with_value=True):
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try:
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for key in self.data:
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if key not in self.props:
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msg = _("Unknown Property %s") % key
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raise exception.StackValidationFailed(message=msg)
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for (key, prop) in self.props.items():
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if (self.translation.is_deleted(prop.path) or
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self.translation.is_replaced(prop.path)):
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continue
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if with_value:
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try:
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self._get_property_value(key, validate=True)
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except exception.StackValidationFailed as ex:
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path = [key]
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path.extend(ex.path)
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raise exception.StackValidationFailed(
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path=path, message=ex.error_message)
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except ValueError as e:
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if prop.required() and key not in self.data:
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path = []
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else:
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path = [key]
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raise exception.StackValidationFailed(
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path=path, message=six.text_type(e))
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# are there unimplemented Properties
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if not prop.implemented() and key in self.data:
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msg = _("Property %s not implemented yet") % key
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raise exception.StackValidationFailed(message=msg)
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except exception.StackValidationFailed as ex:
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# NOTE(prazumovsky): should reraise exception for adding specific
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# error name and error_prefix to path for correct error message
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# building.
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path = self.error_prefix
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path.extend(ex.path)
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raise exception.StackValidationFailed(
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error=ex.error or 'Property error',
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path=path,
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message=ex.error_message
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)
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def _find_deps_any_in_init(self, unresolved_value):
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deps = function.dependencies(unresolved_value)
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if any(res.action == res.INIT for res in deps):
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return True
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def get_user_value(self, key, validate=False):
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if key not in self:
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raise KeyError(_('Invalid Property %s') % key)
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prop = self.props[key]
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if (self.translation.is_deleted(prop.path) or
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self.translation.is_replaced(prop.path)):
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return
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if key in self.data:
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try:
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unresolved_value = self.data[key]
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if validate:
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if self._find_deps_any_in_init(unresolved_value):
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validate = False
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value = self.resolve(unresolved_value)
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if self.translation.has_translation(prop.path):
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value = self.translation.translate(prop.path,
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value,
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self.data)
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return prop.get_value(value, validate,
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translation=self.translation)
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# Children can raise StackValidationFailed with unique path which
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# is necessary for further use in StackValidationFailed exception.
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# So we need to handle this exception in this method.
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except exception.StackValidationFailed as e:
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raise exception.StackValidationFailed(path=e.path,
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message=e.error_message)
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# the resolver function could raise any number of exceptions,
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# so handle this generically
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except Exception as e:
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raise ValueError(six.text_type(e))
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def _get_property_value(self, key, validate=False):
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if key not in self:
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raise KeyError(_('Invalid Property %s') % key)
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prop = self.props[key]
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if not self.translation.is_deleted(prop.path) and key in self.data:
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return self.get_user_value(key, validate)
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elif self.translation.has_translation(prop.path):
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value = self.translation.translate(prop.path, prop_data=self.data,
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validate=validate)
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if value is not None or prop.has_default():
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return prop.get_value(value)
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elif prop.required():
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raise ValueError(_('Property %s not assigned') % key)
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elif prop.has_default():
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return prop.get_value(None, validate,
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translation=self.translation)
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elif prop.required():
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raise ValueError(_('Property %s not assigned') % key)
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def __getitem__(self, key):
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return self._get_property_value(key)
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def __len__(self):
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return len(self.props)
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def __contains__(self, key):
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return key in self.props
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def __iter__(self):
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return iter(self.props)
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@staticmethod
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def _param_def_from_prop(schema):
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"""Return a template parameter definition corresponding to property."""
|
|
param_type_map = {
|
|
schema.INTEGER: parameters.Schema.NUMBER,
|
|
schema.STRING: parameters.Schema.STRING,
|
|
schema.NUMBER: parameters.Schema.NUMBER,
|
|
schema.BOOLEAN: parameters.Schema.BOOLEAN,
|
|
schema.MAP: parameters.Schema.MAP,
|
|
schema.LIST: parameters.Schema.LIST,
|
|
}
|
|
|
|
def param_items():
|
|
yield parameters.TYPE, param_type_map[schema.type]
|
|
|
|
if schema.description is not None:
|
|
yield parameters.DESCRIPTION, schema.description
|
|
|
|
if schema.default is not None:
|
|
yield parameters.DEFAULT, schema.default
|
|
|
|
for constraint in schema.constraints:
|
|
if isinstance(constraint, constr.Length):
|
|
if constraint.min is not None:
|
|
yield parameters.MIN_LENGTH, constraint.min
|
|
if constraint.max is not None:
|
|
yield parameters.MAX_LENGTH, constraint.max
|
|
elif isinstance(constraint, constr.Range):
|
|
if constraint.min is not None:
|
|
yield parameters.MIN_VALUE, constraint.min
|
|
if constraint.max is not None:
|
|
yield parameters.MAX_VALUE, constraint.max
|
|
elif isinstance(constraint, constr.AllowedValues):
|
|
yield parameters.ALLOWED_VALUES, list(constraint.allowed)
|
|
elif isinstance(constraint, constr.AllowedPattern):
|
|
yield parameters.ALLOWED_PATTERN, constraint.pattern
|
|
|
|
if schema.type == schema.BOOLEAN:
|
|
yield parameters.ALLOWED_VALUES, ['True', 'true',
|
|
'False', 'false']
|
|
|
|
return dict(param_items())
|
|
|
|
@staticmethod
|
|
def _prop_def_from_prop(name, schema):
|
|
"""Return a provider template property definition for a property."""
|
|
if schema.type == Schema.LIST:
|
|
return {'Fn::Split': [',', {'Ref': name}]}
|
|
else:
|
|
return {'Ref': name}
|
|
|
|
@staticmethod
|
|
def _hot_param_def_from_prop(schema):
|
|
"""Parameter definition corresponding to property for hot template."""
|
|
param_type_map = {
|
|
schema.INTEGER: hot_param.HOTParamSchema.NUMBER,
|
|
schema.STRING: hot_param.HOTParamSchema.STRING,
|
|
schema.NUMBER: hot_param.HOTParamSchema.NUMBER,
|
|
schema.BOOLEAN: hot_param.HOTParamSchema.BOOLEAN,
|
|
schema.MAP: hot_param.HOTParamSchema.MAP,
|
|
schema.LIST: hot_param.HOTParamSchema.LIST,
|
|
}
|
|
|
|
def param_items():
|
|
yield hot_param.HOTParamSchema.TYPE, param_type_map[schema.type]
|
|
|
|
if schema.description is not None:
|
|
yield hot_param.HOTParamSchema.DESCRIPTION, schema.description
|
|
|
|
if schema.default is not None:
|
|
yield hot_param.HOTParamSchema.DEFAULT, schema.default
|
|
|
|
def constraint_items(constraint):
|
|
|
|
def range_min_max(constraint):
|
|
if constraint.min is not None:
|
|
yield hot_param.MIN, constraint.min
|
|
if constraint.max is not None:
|
|
yield hot_param.MAX, constraint.max
|
|
|
|
if isinstance(constraint, constr.Length):
|
|
yield hot_param.LENGTH, dict(range_min_max(constraint))
|
|
elif isinstance(constraint, constr.Range):
|
|
yield hot_param.RANGE, dict(range_min_max(constraint))
|
|
elif isinstance(constraint, constr.AllowedValues):
|
|
yield hot_param.ALLOWED_VALUES, list(constraint.allowed)
|
|
elif isinstance(constraint, constr.AllowedPattern):
|
|
yield hot_param.ALLOWED_PATTERN, constraint.pattern
|
|
|
|
if schema.constraints:
|
|
yield (hot_param.HOTParamSchema.CONSTRAINTS,
|
|
[dict(constraint_items(constraint)) for constraint
|
|
in schema.constraints])
|
|
|
|
return dict(param_items())
|
|
|
|
@staticmethod
|
|
def _hot_prop_def_from_prop(name, schema):
|
|
"""Return a provider template property definition for a property."""
|
|
return {'get_param': name}
|
|
|
|
@classmethod
|
|
def schema_to_parameters_and_properties(cls, schema, template_type='cfn'):
|
|
"""Convert a schema to template parameters and properties.
|
|
|
|
This can be used to generate a provider template that matches the
|
|
given properties schemata.
|
|
|
|
:param schema: A resource type's properties_schema
|
|
:returns: A tuple of params and properties dicts
|
|
|
|
ex: input: {'foo': {'Type': 'List'}}
|
|
output: {'foo': {'Type': 'CommaDelimitedList'}},
|
|
{'foo': {'Fn::Split': {'Ref': 'foo'}}}
|
|
|
|
ex: input: {'foo': {'Type': 'String'}, 'bar': {'Type': 'Map'}}
|
|
output: {'foo': {'Type': 'String'}, 'bar': {'Type': 'Json'}},
|
|
{'foo': {'Ref': 'foo'}, 'bar': {'Ref': 'bar'}}
|
|
"""
|
|
def param_prop_def_items(name, schema, template_type):
|
|
if template_type == 'hot':
|
|
param_def = cls._hot_param_def_from_prop(schema)
|
|
prop_def = cls._hot_prop_def_from_prop(name, schema)
|
|
else:
|
|
param_def = cls._param_def_from_prop(schema)
|
|
prop_def = cls._prop_def_from_prop(name, schema)
|
|
return (name, param_def), (name, prop_def)
|
|
|
|
if not schema:
|
|
return {}, {}
|
|
|
|
param_prop_defs = [param_prop_def_items(n, s, template_type)
|
|
for n, s in six.iteritems(schemata(schema))
|
|
if s.implemented]
|
|
param_items, prop_items = zip(*param_prop_defs)
|
|
return dict(param_items), dict(prop_items)
|