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48 lines
1.8 KiB
Python
48 lines
1.8 KiB
Python
# SPDX-License-Identifier: GPL-2.0-only
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#
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# This file is part of Nominatim. (https://nominatim.org)
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#
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# Copyright (C) 2022 by the Nominatim developer community.
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# For a full list of authors see the git log.
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"""
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Handler for cleaning name and address tags in place information before it
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is handed to the token analysis.
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"""
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from typing import Optional, List, Mapping, Sequence, Callable, Any, Tuple
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import importlib
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from nominatim.errors import UsageError
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from nominatim.tokenizer.sanitizers.config import SanitizerConfig
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from nominatim.tokenizer.sanitizers.base import SanitizerHandler, ProcessInfo, PlaceName
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from nominatim.data.place_info import PlaceInfo
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class PlaceSanitizer:
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""" Controller class which applies sanitizer functions on the place
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names and address before they are used by the token analysers.
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"""
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def __init__(self, rules: Optional[Sequence[Mapping[str, Any]]]) -> None:
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self.handlers: List[Callable[[ProcessInfo], None]] = []
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if rules:
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for func in rules:
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if 'step' not in func:
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raise UsageError("Sanitizer rule is missing the 'step' attribute.")
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module_name = 'nominatim.tokenizer.sanitizers.' + func['step'].replace('-', '_')
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handler_module: SanitizerHandler = importlib.import_module(module_name)
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self.handlers.append(handler_module.create(SanitizerConfig(func)))
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def process_names(self, place: PlaceInfo) -> Tuple[List[PlaceName], List[PlaceName]]:
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""" Extract a sanitized list of names and address parts from the
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given place. The function returns a tuple
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(list of names, list of address names)
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"""
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obj = ProcessInfo(place)
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for func in self.handlers:
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func(obj)
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return obj.names, obj.address
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