1 ##############################################################################
2 #
3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors.
4 # All Rights Reserved.
5 #
6 # This software is subject to the provisions of the Zope Public License,
7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
11 # FOR A PARTICULAR PURPOSE
12 #
13 ##############################################################################
14 """Generic expat-based XML parser base class.
16 Modified for Roundup 0.5 release:
18 - removed dependency on zLOG
20 """
21 __docformat__ = 'restructuredtext'
23 class XMLParser:
25 ordered_attributes = 0
27 handler_names = [
28 "StartElementHandler",
29 "EndElementHandler",
30 "ProcessingInstructionHandler",
31 "CharacterDataHandler",
32 "UnparsedEntityDeclHandler",
33 "NotationDeclHandler",
34 "StartNamespaceDeclHandler",
35 "EndNamespaceDeclHandler",
36 "CommentHandler",
37 "StartCdataSectionHandler",
38 "EndCdataSectionHandler",
39 "DefaultHandler",
40 "DefaultHandlerExpand",
41 "NotStandaloneHandler",
42 "ExternalEntityRefHandler",
43 "XmlDeclHandler",
44 "StartDoctypeDeclHandler",
45 "EndDoctypeDeclHandler",
46 "ElementDeclHandler",
47 "AttlistDeclHandler"
48 ]
50 def __init__(self, encoding=None):
51 self.parser = p = self.createParser()
52 if self.ordered_attributes:
53 try:
54 self.parser.ordered_attributes = self.ordered_attributes
55 except AttributeError:
56 #zLOG.LOG("TAL.XMLParser", zLOG.INFO,
57 # "Can't set ordered_attributes")
58 self.ordered_attributes = 0
59 for name in self.handler_names:
60 method = getattr(self, name, None)
61 if method is not None:
62 try:
63 setattr(p, name, method)
64 except AttributeError:
65 #zLOG.LOG("TAL.XMLParser", zLOG.PROBLEM,
66 # "Can't set expat handler %s" % name)
67 pass
69 def createParser(self, encoding=None):
70 global XMLParseError
71 try:
72 from Products.ParsedXML.Expat import pyexpat
73 XMLParseError = pyexpat.ExpatError
74 return pyexpat.ParserCreate(encoding, ' ')
75 except ImportError:
76 from xml.parsers import expat
77 XMLParseError = expat.ExpatError
78 return expat.ParserCreate(encoding, ' ')
80 def parseFile(self, filename):
81 self.parseStream(open(filename))
83 def parseString(self, s):
84 self.parser.Parse(s, 1)
86 def parseURL(self, url):
87 import urllib
88 self.parseStream(urllib.urlopen(url))
90 def parseStream(self, stream):
91 self.parser.ParseFile(stream)
93 def parseFragment(self, s, end=0):
94 self.parser.Parse(s, end)