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42 lines
1.3 KiB
42 lines
1.3 KiB
#!/usr/bin/env python3
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#
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# Copyright 2020 - The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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class Capture(object):
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"""
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Wrap a match function and use in its place, to capture the value
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that matched. Specify an optional |capture_fn| to transform the
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captured value.
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"""
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def __init__(self, match_fn, capture_fn=None):
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self._match_fn = match_fn
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self._capture_fn = capture_fn
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self._value = None
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def __call__(self, obj):
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if self._match_fn(obj) != True:
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return False
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if self._capture_fn is not None:
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self._value = self._capture_fn(obj)
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else:
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self._value = obj
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return True
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def get(self):
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return self._value
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