| David Brazdil | dbad6e8 | 2015-05-20 12:19:40 +0100 | [diff] [blame] | 1 | # Copyright (C) 2015 The Android Open Source Project |
| 2 | # |
| 3 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | # you may not use this file except in compliance with the License. |
| 5 | # You may obtain a copy of the License at |
| 6 | # |
| 7 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | # |
| 9 | # Unless required by applicable law or agreed to in writing, software |
| 10 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | # See the License for the specific language governing permissions and |
| 13 | # limitations under the License. |
| 14 | |
| 15 | class ImmutableDict(dict): |
| 16 | def __setitem__(self, key, value): |
| 17 | raise RuntimeError("Cannot modify ImmutableDict") |
| 18 | |
| 19 | def __delitem__(self, key): |
| 20 | raise RuntimeError("Cannot modify ImmutableDict") |
| 21 | |
| 22 | def copyWith(self, key, value): |
| 23 | newDict = ImmutableDict(self) |
| 24 | dict.__setitem__(newDict, key, value) |
| 25 | return newDict |