61 lines
1.9 KiB
Python
61 lines
1.9 KiB
Python
# Copyright 2009 10gen, Inc.
|
|
#
|
|
# 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.
|
|
|
|
"""Tools for representing JavaScript code to be evaluated by MongoDB.
|
|
"""
|
|
|
|
class Code(str):
|
|
"""JavaScript code to be evaluated by MongoDB.
|
|
|
|
Raises :class:`TypeError` if `code` is not an instance of
|
|
:class:`basestring` or `scope` is not an instance of
|
|
:class:`dict`.
|
|
|
|
:Parameters:
|
|
- `code`: string containing JavaScript code to be evaluated
|
|
- `scope` (optional): dictionary representing the scope in which
|
|
`code` should be evaluated - a mapping from identifiers (as
|
|
strings) to values
|
|
"""
|
|
|
|
def __new__(cls, code, scope=None):
|
|
if not isinstance(code, basestring):
|
|
raise TypeError("code must be an instance of basestring")
|
|
|
|
if scope is None:
|
|
try:
|
|
scope = code.scope
|
|
except AttributeError:
|
|
scope = {}
|
|
if not isinstance(scope, dict):
|
|
raise TypeError("scope must be an instance of dict")
|
|
|
|
self = str.__new__(cls, code)
|
|
self.__scope = scope
|
|
return self
|
|
|
|
@property
|
|
def scope(self):
|
|
"""Scope dictionary for this instance.
|
|
"""
|
|
return self.__scope
|
|
|
|
def __repr__(self):
|
|
return "Code(%s, %r)" % (str.__repr__(self), self.__scope)
|
|
|
|
def __eq__(self, other):
|
|
if isinstance(other, Code):
|
|
return (self.__scope, str(self)) == (other.__scope, str(other))
|
|
return False
|