59 lines
1.9 KiB
Python
59 lines
1.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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sleekxmpp.xmlstream.matcher.xpath
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Part of SleekXMPP: The Sleek XMPP Library
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:copyright: (c) 2011 Nathanael C. Fritz
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:license: MIT, see LICENSE for more details
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"""
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from sleekxmpp.xmlstream.stanzabase import ET, fix_ns
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from sleekxmpp.xmlstream.matcher.base import MatcherBase
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class MatchXPath(MatcherBase):
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"""
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The XPath matcher selects stanzas whose XML contents matches a given
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XPath expression.
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.. warning::
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Using this matcher may not produce expected behavior when using
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attribute selectors. For Python 2.6 and 3.1, the ElementTree
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:meth:`~xml.etree.ElementTree.Element.find()` method does
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not support the use of attribute selectors. If you need to
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support Python 2.6 or 3.1, it might be more useful to use a
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:class:`~sleekxmpp.xmlstream.matcher.stanzapath.StanzaPath` matcher.
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If the value of :data:`IGNORE_NS` is set to ``True``, then XPath
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expressions will be matched without using namespaces.
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"""
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def __init__(self, criteria):
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self._criteria = fix_ns(criteria)
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def match(self, xml):
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"""
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Compare a stanza's XML contents to an XPath expression.
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If the value of :data:`IGNORE_NS` is set to ``True``, then XPath
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expressions will be matched without using namespaces.
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.. warning::
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In Python 2.6 and 3.1 the ElementTree
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:meth:`~xml.etree.ElementTree.Element.find()` method does not
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support attribute selectors in the XPath expression.
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:param xml: The :class:`~sleekxmpp.xmlstream.stanzabase.ElementBase`
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stanza to compare against.
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"""
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if hasattr(xml, 'xml'):
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xml = xml.xml
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x = ET.Element('x')
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x.append(xml)
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return x.find(self._criteria) is not None
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