ncclient:NETCONF Python client

# Copyright 2009 Shikhar Bhushan

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#    http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

'Boilerplate'

from ncclient import OperationError

from . import MissingCapabilityError

def one_of(*args):

    'Verifies that only one of the arguments is not None'

    for i, arg in enumerate(args):

        if arg is not None:

            for argh in args[i+1:]:

                if argh is not None:

                    raise OperationError('Too many parameters')

            else:

                return

    raise OperationError('Insufficient parameters')

def store_or_url(store, url):

    one_of(store, url)

    node = {}

    if store is not None:

        node['tag'] = store

    else:

        node['tag'] = 'url'

        node['text'] = url

    return node

def build_filter(type, criteria):

    filter = {

        'tag': 'filter',

        'attributes': {'type': type}

    }

    if type == 'xpath':

        filter['attributes']['select'] = criteria

    else:

        filter['subtree'] = [criteria]

    return filter