/usr/lib/python3/dist-packages/warlock/model.py is in python3-warlock 1.2.0-2.
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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 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | # 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.
"""Self-validating model for arbitrary objects"""
import copy
import warnings
import jsonpatch
import jsonschema
import six
from . import exceptions
class Model(dict):
def __init__(self, *args, **kwargs):
# we overload setattr so set this manually
d = dict(*args, **kwargs)
try:
self.validate(d)
except exceptions.ValidationError as exc:
raise ValueError(str(exc))
else:
dict.__init__(self, d)
self.__dict__['changes'] = {}
self.__dict__['__original__'] = copy.deepcopy(d)
def __setitem__(self, key, value):
mutation = dict(self.items())
mutation[key] = value
try:
self.validate(mutation)
except exceptions.ValidationError as exc:
msg = ("Unable to set '%s' to '%s'. Reason: %s"
% (key, value, str(exc)))
raise exceptions.InvalidOperation(msg)
dict.__setitem__(self, key, value)
self.__dict__['changes'][key] = value
def __delitem__(self, key):
mutation = dict(self.items())
del mutation[key]
try:
self.validate(mutation)
except exceptions.ValidationError as exc:
msg = ("Unable to delete attribute '%s'. Reason: %s"
% (key, str(exc)))
raise exceptions.InvalidOperation(msg)
dict.__delitem__(self, key)
def __getattr__(self, key):
try:
return self.__getitem__(key)
except KeyError:
raise AttributeError(key)
def __setattr__(self, key, value):
self.__setitem__(key, value)
def __delattr__(self, key):
self.__delitem__(key)
### BEGIN dict compatibility methods ###
def clear(self):
raise exceptions.InvalidOperation()
def pop(self, key, default=None):
raise exceptions.InvalidOperation()
def popitem(self):
raise exceptions.InvalidOperation()
def copy(self):
return copy.deepcopy(dict(self))
def update(self, other):
mutation = dict(self.items())
mutation.update(other)
try:
self.validate(mutation)
except exceptions.ValidationError as exc:
raise exceptions.InvalidOperation(str(exc))
dict.update(self, other)
def iteritems(self):
return six.iteritems(copy.deepcopy(dict(self)))
def items(self):
return copy.deepcopy(dict(self)).items()
def itervalues(self):
return six.itervalues(copy.deepcopy(dict(self)))
def values(self):
return copy.deepcopy(dict(self)).values()
### END dict compatibility methods ###
@property
def patch(self):
"""Return a jsonpatch object representing the delta"""
original = self.__dict__['__original__']
return jsonpatch.make_patch(original, dict(self)).to_string()
@property
def changes(self):
"""Dumber version of 'patch' method"""
deprecation_msg = 'Model.changes will be removed in warlock v2'
warnings.warn(deprecation_msg, DeprecationWarning, stacklevel=2)
return copy.deepcopy(self.__dict__['changes'])
def validate(self, obj):
"""Apply a JSON schema to an object"""
try:
jsonschema.validate(obj, self.schema)
except jsonschema.ValidationError as exc:
raise exceptions.ValidationError(str(exc))
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