root / pithos / lib / filter.py @ f897bea9
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1 | 1713c946 | Antony Chazapis | # Copyright 2011 GRNET S.A. All rights reserved.
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2 | 1713c946 | Antony Chazapis | #
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11 | 1713c946 | Antony Chazapis | # 2. Redistributions in binary form must reproduce the above
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29 | 1713c946 | Antony Chazapis | # The views and conclusions contained in the software and
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30 | 1713c946 | Antony Chazapis | # documentation are those of the authors and should not be
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32 | 1713c946 | Antony Chazapis | # or implied, of GRNET S.A.
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33 | 1713c946 | Antony Chazapis | |
34 | 1713c946 | Antony Chazapis | import re |
35 | f897bea9 | Sofia Papagiannaki | import operator |
36 | 1713c946 | Antony Chazapis | |
37 | f897bea9 | Sofia Papagiannaki | _regexfilter = re.compile('(!?)\s*(\S+?)\s*(?:(=|!=|<=|>=|<|>)\s*(\S*?)\s*)?$', re.UNICODE)
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38 | 1713c946 | Antony Chazapis | |
39 | f897bea9 | Sofia Papagiannaki | OPERATORS = {'=':operator.eq,
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40 | f897bea9 | Sofia Papagiannaki | '!=':operator.ne,
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41 | f897bea9 | Sofia Papagiannaki | '<=':operator.le,
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42 | f897bea9 | Sofia Papagiannaki | '>=':operator.ge,
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43 | f897bea9 | Sofia Papagiannaki | '<':operator.lt,
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44 | f897bea9 | Sofia Papagiannaki | '>':operator.gt
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45 | f897bea9 | Sofia Papagiannaki | } |
46 | 1713c946 | Antony Chazapis | |
47 | 1713c946 | Antony Chazapis | def parse_filters(terms): |
48 | 1713c946 | Antony Chazapis | included = [] |
49 | 1713c946 | Antony Chazapis | excluded = [] |
50 | 1713c946 | Antony Chazapis | opers = [] |
51 | 1713c946 | Antony Chazapis | match = _regexfilter.match |
52 | 1713c946 | Antony Chazapis | for term in terms: |
53 | 1713c946 | Antony Chazapis | m = match(term) |
54 | 1713c946 | Antony Chazapis | if m is None: |
55 | 1713c946 | Antony Chazapis | continue
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56 | 1713c946 | Antony Chazapis | neg, key, op, value = m.groups() |
57 | 1713c946 | Antony Chazapis | if neg:
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58 | 1713c946 | Antony Chazapis | excluded.append(key) |
59 | 1713c946 | Antony Chazapis | elif op:
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60 | 1713c946 | Antony Chazapis | opers.append((key, op, value)) |
61 | f897bea9 | Sofia Papagiannaki | elif not value: |
62 | f897bea9 | Sofia Papagiannaki | included.append(key) |
63 | f897bea9 | Sofia Papagiannaki | |
64 | 1713c946 | Antony Chazapis | return included, excluded, opers |