| #!/usr/bin/env python3 |
| # |
| # Copyright 2020 - The Android Open Source Project |
| # |
| # 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. |
| |
| |
| class Capture(object): |
| """ |
| Wrap a match function and use in its place, to capture the value |
| that matched. Specify an optional |capture_fn| to transform the |
| captured value. |
| """ |
| |
| def __init__(self, match_fn, capture_fn=None): |
| self._match_fn = match_fn |
| self._capture_fn = capture_fn |
| self._value = None |
| |
| def __call__(self, obj): |
| if self._match_fn(obj) != True: |
| return False |
| |
| if self._capture_fn is not None: |
| self._value = self._capture_fn(obj) |
| else: |
| self._value = obj |
| return True |
| |
| def get(self): |
| return self._value |
