dbus/introspect_parser.py

   1 import libxml2
   2 import cStringIO
   3 import exceptions
   4
   5 def process_introspection_data(data):
   6     method_map = {}
   7
   8     XMLREADER_START_ELEMENT_NODE_TYPE = 1
   9     XMLREADER_END_ELEMENT_NODE_TYPE = 15
  10
  11     stream = cStringIO.StringIO(data.encode('utf-8'))
  12     input_source = libxml2.inputBuffer(stream)
  13     reader = input_source.newTextReader("urn:introspect")
  14
  15     ret = reader.Read()
  16     current_iface = None
  17     current_method = None
  18     current_sigstr = ''
  19
  20     while ret == 1:
  21         name = reader.LocalName()
  22         if reader.NodeType() == XMLREADER_START_ELEMENT_NODE_TYPE:
  23             if (not current_iface and not current_method and name == 'interface'):
  24                 current_iface = reader.GetAttribute('name')
  25             elif (current_iface and not current_method and name == 'method'):
  26                 current_method = reader.GetAttribute('name')
  27                 if reader.IsEmptyElement():
  28                     method_map[current_iface + '.' + current_method] = ''
  29                     current_method = None
  30                     current_sigstr = ''
  31
  32             elif (current_iface and current_method and name == 'arg'):
  33                 direction = reader.GetAttribute('direction')
  34
  35                 if not direction or direction == 'in':
  36                     current_sigstr = current_sigstr + reader.GetAttribute('type')
  37
  38         elif reader.NodeType() == XMLREADER_END_ELEMENT_NODE_TYPE:
  39             if (current_iface and not current_method and name == 'interface'):
  40                 current_iface = None
  41             if (current_iface and current_method and name == 'method'):
  42                 method_map[current_iface + '.' + current_method] = current_sigstr
  43                 current_method = None
  44                 current_sigstr = ''
  45
  46         ret = reader.Read()
  47
  48     if ret != 0:
  49         raise exceptions.IntrospectionParserException(data)
  50
  51     return method_map