2 # ============LICENSE_START=======================================================
3 # org.onap.vvp/validation-scripts
4 # ===================================================================
5 # Copyright © 2017 AT&T Intellectual Property. All rights reserved.
6 # ===================================================================
8 # Unless otherwise specified, all software contained herein is licensed
9 # under the Apache License, Version 2.0 (the "License");
10 # you may not use this software except in compliance with the License.
11 # You may obtain a copy of the License at
13 # http://www.apache.org/licenses/LICENSE-2.0
15 # Unless required by applicable law or agreed to in writing, software
16 # distributed under the License is distributed on an "AS IS" BASIS,
17 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 # See the License for the specific language governing permissions and
19 # limitations under the License.
23 # Unless otherwise specified, all documentation contained herein is licensed
24 # under the Creative Commons License, Attribution 4.0 Intl. (the "License");
25 # you may not use this documentation except in compliance with the License.
26 # You may obtain a copy of the License at
28 # https://creativecommons.org/licenses/by/4.0/
30 # Unless required by applicable law or agreed to in writing, documentation
31 # distributed under the License is distributed on an "AS IS" BASIS,
32 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
33 # See the License for the specific language governing permissions and
34 # limitations under the License.
36 # ============LICENSE_END============================================
40 from yaml.constructor import ConstructorError
41 from yaml.nodes import MappingNode
44 from yaml import CLoader as SafeLoader
46 from yaml import SafeLoader
49 class UniqueKeyLoader(SafeLoader):
50 def construct_mapping(self, node, deep=False):
51 if not isinstance(node, MappingNode):
52 raise ConstructorError(
55 "expected a mapping node, but found %s" % node.id,
59 for key_node, value_node in node.value:
60 key = self.construct_object(key_node, deep=deep)
63 except TypeError as exc:
64 raise ConstructorError(
65 "while constructing a mapping",
67 "found unacceptable key (%s)" % exc,
70 # check for duplicate keys
72 raise ConstructorError(
73 "while constructing a mapping",
75 "found duplicate key",
78 value = self.construct_object(value_node, deep=deep)