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# Copyright 2022-2024 ETSI SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)
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#
# 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.
import libyang, os
from typing import Dict, Optional
YANG_DIR = os.path.join(os.path.dirname(__file__), 'yang')
class YangValidator:
def __init__(self, main_module : str, dependency_modules : [str]) -> None:
self._yang_context = libyang.Context(YANG_DIR)
self._yang_module = self._yang_context.load_module(main_module)
mods = [self._yang_context.load_module(mod) for mod in dependency_modules] + [self._yang_module]
for mod in mods:
mod.feature_enable_all()
def parse_to_dict(self, message : Dict) -> Dict:
dnode : Optional[libyang.DNode] = self._yang_module.parse_data_dict(
message, validate_present=True, validate=True, strict=True
)
if dnode is None: raise Exception('Unable to parse Message({:s})'.format(str(message)))
message = dnode.print_dict()
dnode.free()
return message
def destroy(self) -> None:
self._yang_context.destroy()