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
|
# Copyright (c) 2011 OpenStack, LLC.
# All Rights Reserved.
#
# 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.
import operator
from openstack.common import strutils
# 1. The following operations are supported:
# =, s==, s!=, s>=, s>, s<=, s<, <in>, <is>, <or>, ==, !=, >=, <=
# 2. Note that <or> is handled in a different way below.
# 3. If the first word in the extra_specs is not one of the operators,
# it is ignored.
_op_methods = {'=': lambda x, y: float(x) >= float(y),
'<in>': lambda x, y: y in x,
'<is>': lambda x, y: (strutils.bool_from_string(x) is
strutils.bool_from_string(y)),
'==': lambda x, y: float(x) == float(y),
'!=': lambda x, y: float(x) != float(y),
'>=': lambda x, y: float(x) >= float(y),
'<=': lambda x, y: float(x) <= float(y),
's==': operator.eq,
's!=': operator.ne,
's<': operator.lt,
's<=': operator.le,
's>': operator.gt,
's>=': operator.ge}
def match(value, req):
words = req.split()
op = method = None
if words:
op = words.pop(0)
method = _op_methods.get(op)
if op != '<or>' and not method:
return value == req
if value is None:
return False
if op == '<or>': # Ex: <or> v1 <or> v2 <or> v3
while True:
if words.pop(0) == value:
return True
if not words:
break
op = words.pop(0) # remove a keyword <or>
if not words:
break
return False
try:
if words and method(value, words[0]):
return True
except ValueError:
pass
return False
|
