/[thuban]/branches/WIP-pyshapelib-bramz/test/xmlsupport.py
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trunk/thuban/test/xmlsupport.py revision 1257 by bh, Fri Jun 20 12:22:25 2003 UTC branches/WIP-pyshapelib-bramz/test/xmlsupport.py revision 2734 by bramz, Thu Mar 1 12:42:59 2007 UTC
# Line 7  Line 7 
7    
8  """XML support code for the test cases"""  """XML support code for the test cases"""
9    
10    __version__ = "$Revision$"
11    # $Source$
12    # $Id$
13    
14  import sys  import sys
15  import os  import os
16  from StringIO import StringIO  from StringIO import StringIO
# Line 59  class ValidationTest: Line 63  class ValidationTest:
63  class SaxEventLister(xml.sax.handler.ContentHandler):  class SaxEventLister(xml.sax.handler.ContentHandler):
64    
65      """Create a normalized list representation containing the SAX events      """Create a normalized list representation containing the SAX events
66    
67        The normalization includes the following
68    
69         - The attribute dictionary of a staertElement event is converted to
70           a sorted list of (key, value) pairs
71    
72         - ID and IDREF attribute values are normalized in such a way that
73           two documents that only use different values for IDs can still
74           lead to the same normalized representation.
75    
76           The implementation of this feature assumes that all IDs are
77           defined before they are used. The normalized ID values are of the
78           form 'D<NUM>' where <NUM> is a counter starting with 0, so the
79           first ID value will become 'D0', the second 'D1', etc.
80    
81           Which attributes are IDs or IDREFS is defined with the
82           correspoding constructor arguments.
83    
84         - Filenames are normalized with os.path.normpath. Which attributes
85           are filenames is defiend with the corresponding constructor
86           argument.
87      """      """
88    
89      def __init__(self):      def __init__(self, ids = (), idrefs = (), filenames = ()):
90            """Initialize the SaxEventLister
91    
92            The ids and idrefs parameters should be lists of (element, attr)
93            pairs where element is the name of an attribute as passed to the
94            startElementNS method and attr is the name of an attribute as
95            used in the mapping passed to startElementNS, so both name and
96            attr usually must include the namespace.
97    
98            The filenames parameter should be a sequence of the same form as
99            ids and idrefs identifying the attributes which are filenames
100            that should be normalized.
101            """
102          self.eventlist = []          self.eventlist = []
103            self.ids = ids
104            self.idrefs = idrefs
105            self.idremap = {}
106            self.filenames = filenames
107    
108      def startElementNS(self, name, qname, attrs):      def startElementNS(self, name, qname, attrs):
109          items = attrs.items()          items = attrs.items()
110          items.sort()          items.sort()
111          self.eventlist.append(("start", name, qname, items))          for i, (attr, value) in zip(range(len(items)), items):
112                #print '++++'
113                #print self.idremap
114                #print name, attr, value
115                if (name, attr) in self.ids:
116                    newid = len(self.idremap)
117                    self.idremap[value] = "D" + str(newid)
118                    value = self.idremap[value]
119                elif (name, attr) in self.idrefs:
120                    value = self.idremap[value]
121                elif (name, attr) in self.filenames:
122                    value = os.path.normpath(value)
123                items[i] = (attr, value)
124                #print name, attr, value
125            self.eventlist.append(("start", name, items))
126    
127      def endElementNS(self, name, qname):      def endElementNS(self, name, qname):
128          self.eventlist.append(("end", name, qname))          self.eventlist.append(("end", name))
129    
130    
131  def sax_eventlist(data = None, filename = None):  def sax_eventlist(data = None, filename = None,
132                      ids = (), idrefs = (), filenames = ()):
133      """Return a list of SAX event generated for a given XML source      """Return a list of SAX event generated for a given XML source
134    
135      The xml source may either be a string with the actual XML, in which      The xml source may either be a string with the actual XML, in which
# Line 82  def sax_eventlist(data = None, filename Line 138  def sax_eventlist(data = None, filename
138      """      """
139      if filename is not None:      if filename is not None:
140          data = open(filename).read()          data = open(filename).read()
141      handler = SaxEventLister()      handler = SaxEventLister(ids = ids, idrefs = idrefs, filenames = filenames)
142      parser = make_parser()      parser = make_parser()
143      parser.setContentHandler(handler)      parser.setContentHandler(handler)
144      parser.setErrorHandler(ErrorHandler())      parser.setErrorHandler(ErrorHandler())
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