# Copyright (C) 2003, 2004, 2005, 2006 Red Hat Inc. <http://www.redhat.com/>

# Copyright (C) 2003 David Zeuthen

# Copyright (C) 2004 Rob Taylor

# Copyright (C) 2005, 2006 Collabora Ltd. <http://www.collabora.co.uk/>

#

# Permission is hereby granted, free of charge, to any person

# obtaining a copy of this software and associated documentation

# files (the "Software"), to deal in the Software without

# restriction, including without limitation the rights to use, copy,

# modify, merge, publish, distribute, sublicense, and/or sell copies

# of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

#

# The above copyright notice and this permission notice shall be

# included in all copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

# DEALINGS IN THE SOFTWARE.

from xml.parsers.expat import ParserCreate

from dbus.exceptions import IntrospectionParserException

class _Parser(object):

    __slots__ = ('map', 'in_iface', 'in_method', 'sig')

    def __init__(self):

        self.map = {}

        self.in_iface = ''

        self.in_method = ''

        self.sig = ''

    def parse(self, data):

        parser = ParserCreate('UTF-8', ' ')

        parser.buffer_text = True

        parser.StartElementHandler = self.StartElementHandler

        parser.EndElementHandler = self.EndElementHandler

        parser.Parse(data)

        return self.map

    def StartElementHandler(self, name, attributes):

        if not self.in_iface:

            if (not self.in_method and name == 'interface'):

                self.in_iface = attributes['name']

        else:

            if (not self.in_method and name == 'method'):

                self.in_method = attributes['name']

            elif (self.in_method and name == 'arg'):

                if attributes.get('direction', 'in') == 'in':

                    self.sig += attributes['type']

    def EndElementHandler(self, name):

        if self.in_iface:

            if (not self.in_method and name == 'interface'):

                self.in_iface = ''

            elif (self.in_method and name == 'method'):

                self.map[self.in_iface + '.' + self.in_method] = self.sig

                self.in_method = ''

                self.sig = ''

def process_introspection_data(data):

    """Return a dict mapping ``interface.method`` strings to the

    concatenation of all their 'in' parameters, and mapping

    ``interface.signal`` strings to the concatenation of all their

    parameters.

    Example output::

        {

            'com.example.SignalEmitter.OneString': 's',

            'com.example.MethodImplementor.OneInt32Argument': 'i',

        }

    :Parameters:

        `data` : str

            The introspection XML. Must be an 8-bit string of UTF-8.

    """

    try:

        return _Parser().parse(data)

    except Exception as e:

        raise IntrospectionParserException('%s: %s' % (e.__class__, e))