Revision 3f2f55bb lib/qlang.py
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""" |
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import re |
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import string # pylint: disable-msg=W0402 |
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import pyparsing as pyp |
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from ganeti import errors |
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from ganeti import netutils |
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# Logic operators with one or more operands, each of which is a filter on its |
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OP_CONTAINS = "=[]" |
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#: Characters used for detecting user-written filters (see L{MaybeFilter})
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FILTER_DETECTION_CHARS = frozenset("()=/!~" + string.whitespace)
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def MakeSimpleFilter(namefield, values): |
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"""Builds simple a filter. |
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except pyp.ParseBaseException, err: |
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raise errors.QueryFilterParseError("Failed to parse query filter"
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" '%s': %s" % (text, err), err) |
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def MaybeFilter(text): |
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"""Try to determine if a string is a filter or a name. |
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If in doubt, this function treats a text as a name. |
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@type text: string |
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@param text: String to be examined |
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@rtype: bool |
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""" |
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# Quick check for punctuation and whitespace |
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if frozenset(text) & FILTER_DETECTION_CHARS: |
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return True |
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try: |
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netutils.Hostname.GetNormalizedName(text) |
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except errors.OpPrereqError: |
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# Not a valid hostname, treat as filter |
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return True |
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# Most probably a name |
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return False |
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