121 lines
4.1 KiB
Python
121 lines
4.1 KiB
Python
# Copyright 2020 Red Hat, Inc. All rights reserved.
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#
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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 dataclasses
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import re
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import typing as ty
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from oslo_utils import strutils
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from nova import exception
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@dataclasses.dataclass
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class ExtraSpecValidator:
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name: str
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description: str
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value: ty.Dict[str, ty.Any]
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deprecated: bool = False
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parameters: ty.List[ty.Dict[str, ty.Any]] = dataclasses.field(
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default_factory=list
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)
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name_regex: str = None
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value_regex: str = None
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def __post_init__(self):
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# generate a regex for the name
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name_regex = self.name
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# replace the human-readable patterns with named regex groups; this
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# will transform e.g. 'hw:numa_cpus.{id}' to 'hw:numa_cpus.(?P<id>\d+)'
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for param in self.parameters:
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pattern = f'(?P<{param["name"]}>{param["pattern"]})'
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name_regex = name_regex.replace(f'{{{param["name"]}}}', pattern)
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self.name_regex = name_regex
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# ...and do the same for the value, but only if we're using strings
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if self.value['type'] not in (int, str, bool):
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raise ValueError(
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f"Unsupported parameter type '{self.value['type']}'"
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)
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value_regex = None
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if self.value['type'] == str and self.value.get('pattern'):
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value_regex = self.value['pattern']
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self.value_regex = value_regex
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def _validate_str(self, value):
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if 'pattern' in self.value:
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value_match = re.fullmatch(self.value_regex, value)
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if not value_match:
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raise exception.ValidationError(
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f"Validation failed; '{value}' is not of the format "
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f"'{self.value_regex}'."
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)
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elif 'enum' in self.value:
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if value not in self.value['enum']:
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values = ', '.join(str(x) for x in self.value['enum'])
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raise exception.ValidationError(
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f"Validation failed; '{value}' is not one of: {values}."
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)
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def _validate_int(self, value):
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try:
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value = int(value)
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except ValueError:
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raise exception.ValidationError(
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f"Validation failed; '{value}' is not a valid integer value."
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)
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if 'max' in self.value and self.value['max'] < value:
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raise exception.ValidationError(
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f"Validation failed; '{value}' is greater than the max value "
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f"of '{self.value['max']}'."
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)
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if 'min' in self.value and self.value['min'] > value:
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raise exception.ValidationError(
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f"Validation failed; '{value}' is less than the min value "
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f"of '{self.value['min']}'."
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)
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def _validate_bool(self, value):
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try:
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strutils.bool_from_string(value, strict=True)
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except ValueError:
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raise exception.ValidationError(
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f"Validation failed; '{value}' is not a valid boolean-like "
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f"value."
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)
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def validate(self, name, value):
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name_match = re.fullmatch(self.name_regex, name)
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if not name_match:
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# NOTE(stephenfin): This is mainly here for testing purposes
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raise exception.ValidationError(
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f"Validation failed; expected a name of format '{self.name}' "
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f"but got '{name}'."
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)
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if self.value['type'] == int:
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self._validate_int(value)
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elif self.value['type'] == bool:
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self._validate_bool(value)
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else: # str
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self._validate_str(value)
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