1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
# Copyright 2012 Brian Waldon
#
# 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.
"""Core Warlock functionality"""
import copy
from jsonschema.validators import validator_for
from . import model
def model_factory(schema, base_class=model.Model, name=None, resolver=None):
"""Generate a model class based on the provided JSON Schema
:param schema: dict representing valid JSON schema
:param name: A name to give the class, if `name` is not in `schema`
"""
schema = copy.deepcopy(schema)
resolver = resolver
class Model(base_class):
def _setnested(self, path: list[str], value, root=None):
if root is None:
root = self
if len(path) > 1:
head = path[0]
if not head in root:
root[head] = {}
self._setnested(path[1:], value, root=root[head])
elif len(path) == 1:
root[path[0]] = value
def _pathexists(self, path: list[str], root=None):
if root is None:
root = self
if len(path) == 1:
return path[0] in root
elif len(path) == 0:
return False
else:
head = path[0]
if head in root:
return self._pathexists(path[1:], root=root[head])
else:
return False
def _setdefaults(self, path: list[str], schema_props: dict):
for name, prop in schema_props.items():
if "type" in prop:
local_path = path.copy()
local_path.append(name)
if prop["type"] == "object":
if "properties" in prop:
self._setdefaults(local_path, prop["properties"])
elif "default" in prop and not name in self:
if not self._pathexists(local_path):
self._setnested(local_path, prop["default"])
def __init__(self, *args, **kwargs):
self.__dict__["schema"] = schema
self.__dict__["resolver"] = resolver
cls = validator_for(self.schema)
if resolver is not None:
self.__dict__["validator_instance"] = cls(schema, resolver=resolver)
else:
self.__dict__["validator_instance"] = cls(schema)
base_class.__init__(self, *args, **kwargs)
if "properties" in schema:
self._setdefaults([], schema["properties"])
if resolver is not None:
Model.resolver = resolver
if name is not None:
Model.__name__ = name
elif "name" in schema:
Model.__name__ = str(schema["name"])
return Model
|
