Package dbus :: Module _expat_introspect_parser
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Source Code for Module dbus._expat_introspect_parser

 1  # Copyright (C) 2003, 2004, 2005, 2006 Red Hat Inc. <http://www.redhat.com/> 
 2  # Copyright (C) 2003 David Zeuthen 
 3  # Copyright (C) 2004 Rob Taylor 
 4  # Copyright (C) 2005, 2006 Collabora Ltd. <http://www.collabora.co.uk/> 
 5  # 
 6  # Permission is hereby granted, free of charge, to any person 
 7  # obtaining a copy of this software and associated documentation 
 8  # files (the "Software"), to deal in the Software without 
 9  # restriction, including without limitation the rights to use, copy, 
10  # modify, merge, publish, distribute, sublicense, and/or sell copies 
11  # of the Software, and to permit persons to whom the Software is 
12  # furnished to do so, subject to the following conditions: 
13  # 
14  # The above copyright notice and this permission notice shall be 
15  # included in all copies or substantial portions of the Software. 
16  # 
17  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
18  # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
19  # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
20  # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
21  # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
22  # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
23  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
24  # DEALINGS IN THE SOFTWARE. 
25   
26  from xml.parsers.expat import ExpatError, ParserCreate 
27  from dbus.exceptions import IntrospectionParserException 
28   
29 -class _Parser(object):
30 __slots__ = ('map', 'in_iface', 'in_method', 'sig')
31 - def __init__(self):
32 self.map = {} 33 self.in_iface = '' 34 self.in_method = '' 35 self.sig = ''
36
37 - def parse(self, data):
38 parser = ParserCreate('UTF-8', ' ') 39 parser.buffer_text = True 40 parser.StartElementHandler = self.StartElementHandler 41 parser.EndElementHandler = self.EndElementHandler 42 parser.Parse(data) 43 return self.map
44
45 - def StartElementHandler(self, name, attributes):
46 if not self.in_iface: 47 if (not self.in_method and name == 'interface'): 48 self.in_iface = attributes['name'] 49 else: 50 if (not self.in_method and name == 'method'): 51 self.in_method = attributes['name'] 52 elif (self.in_method and name == 'arg'): 53 if attributes.get('direction', 'in') == 'in': 54 self.sig += attributes['type']
55
56 - def EndElementHandler(self, name):
57 if self.in_iface: 58 if (not self.in_method and name == 'interface'): 59 self.in_iface = '' 60 elif (self.in_method and name == 'method'): 61 self.map[self.in_iface + '.' + self.in_method] = self.sig 62 self.in_method = '' 63 self.sig = ''
64
65 -def process_introspection_data(data):
66 """Return a dict mapping ``interface.method`` strings to the 67 concatenation of all their 'in' parameters, and mapping 68 ``interface.signal`` strings to the concatenation of all their 69 parameters. 70 71 Example output:: 72 73 { 74 'com.example.SignalEmitter.OneString': 's', 75 'com.example.MethodImplementor.OneInt32Argument': 'i', 76 } 77 78 :Parameters: 79 `data` : str 80 The introspection XML. Must be an 8-bit string of UTF-8. 81 """ 82 try: 83 return _Parser().parse(data) 84 except Exception, e: 85 raise IntrospectionParserException('%s: %s' % (e.__class__, e))
86