1 # SPDX-License-Identifier: GPL-3.0-or-later
3 # This file is part of Nominatim. (https://nominatim.org)
5 # Copyright (C) 2025 by the Nominatim developer community.
6 # For a full list of authors see the git log.
8 This file replaces values based on pre-defined regex rules:
10 from typing import List
13 from .config import QueryConfig
14 from .base import QueryProcessingFunc
15 from ..search.query import Phrase
18 class _GenericPreprocessing:
20 def __init__(self, config: QueryConfig) -> None:
23 match_patterns = self.config.get('replacements', 'Key not found')
24 self.compiled_patterns = [
25 (re.compile(item['pattern']), item['replace']) for item in match_patterns
28 def split_phrase(self, phrase: Phrase) -> Phrase:
30 This function performs replacements on the given text using regex patterns.
32 for item in self.compiled_patterns:
33 phrase.text = item[0].sub(item[1], phrase.text)
37 def __call__(self, phrases: List[Phrase]) -> List[Phrase]:
38 """Apply regex replacements to the given addresses.
40 result = [p for p in map(self.split_phrase, phrases) if p.text.strip()]
41 return result if result else []
44 def create(config: QueryConfig) -> QueryProcessingFunc:
45 """ Create a function for generic preprocessing.
47 return _GenericPreprocessing(config)