X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/8b90ee4364b54b71b790cf52c1ccca31048437d7..b0067a0345c2ab7793614925d6150141ef5f18f0:/nominatim/tools/special_phrases/sp_importer.py diff --git a/nominatim/tools/special_phrases/sp_importer.py b/nominatim/tools/special_phrases/sp_importer.py index d9d126fa..06b59fd0 100644 --- a/nominatim/tools/special_phrases/sp_importer.py +++ b/nominatim/tools/special_phrases/sp_importer.py @@ -1,3 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# This file is part of Nominatim. (https://nominatim.org) +# +# Copyright (C) 2022 by the Nominatim developer community. +# For a full list of authors see the git log. """ Module containing the class handling the import of the special phrases. @@ -7,19 +13,36 @@ The phrases already present in the database which are not valids anymore are removed. """ +from typing import Iterable, Tuple, Mapping, Sequence, Optional, Set import logging import re -from psycopg2.sql import Identifier, Literal, SQL +from psycopg2.sql import Identifier, SQL + +from nominatim.config import Configuration +from nominatim.db.connection import Connection from nominatim.tools.special_phrases.importer_statistics import SpecialPhrasesImporterStatistics +from nominatim.tools.special_phrases.special_phrase import SpecialPhrase +from nominatim.tokenizer.base import AbstractTokenizer +from nominatim.typing import Protocol LOG = logging.getLogger() -def _classtype_table(phrase_class, phrase_type): +def _classtype_table(phrase_class: str, phrase_type: str) -> str: """ Return the name of the table for the given class and type. """ return f'place_classtype_{phrase_class}_{phrase_type}' + +class SpecialPhraseLoader(Protocol): + """ Protocol for classes implementing a loader for special phrases. + """ + + def generate_phrases(self) -> Iterable[SpecialPhrase]: + """ Generates all special phrase terms this loader can produce. + """ + + class SPImporter(): # pylint: disable-msg=too-many-instance-attributes """ @@ -27,21 +50,22 @@ class SPImporter(): Take a sp loader which load the phrases from an external source. """ - def __init__(self, config, db_connection, sp_loader) -> None: + def __init__(self, config: Configuration, conn: Connection, + sp_loader: SpecialPhraseLoader) -> None: self.config = config - self.db_connection = db_connection + self.db_connection = conn self.sp_loader = sp_loader self.statistics_handler = SpecialPhrasesImporterStatistics() self.black_list, self.white_list = self._load_white_and_black_lists() self.sanity_check_pattern = re.compile(r'^\w+$') # This set will contain all existing phrases to be added. - # It contains tuples with the following format: (lable, class, type, operator) - self.word_phrases = set() + # It contains tuples with the following format: (label, class, type, operator) + self.word_phrases: Set[Tuple[str, str, str, str]] = set() # This set will contain all existing place_classtype tables which doesn't match any # special phrases class/type on the wiki. - self.table_phrases_to_delete = set() + self.table_phrases_to_delete: Set[str] = set() - def import_phrases(self, tokenizer, should_replace): + def import_phrases(self, tokenizer: AbstractTokenizer, should_replace: bool) -> None: """ Iterate through all SpecialPhrases extracted from the loader and import them into the database. @@ -56,13 +80,12 @@ class SPImporter(): # Store pairs of class/type for further processing class_type_pairs = set() - for loaded_phrases in self.sp_loader: - for phrase in loaded_phrases: - result = self._process_phrase(phrase) - if result: - class_type_pairs.add(result) + for phrase in self.sp_loader.generate_phrases(): + result = self._process_phrase(phrase) + if result: + class_type_pairs.add(result) - self._create_place_classtype_table_and_indexes(class_type_pairs) + self._create_classtype_table_and_indexes(class_type_pairs) if should_replace: self._remove_non_existent_tables_from_db() self.db_connection.commit() @@ -74,7 +97,7 @@ class SPImporter(): self.statistics_handler.notify_import_done() - def _fetch_existing_place_classtype_tables(self): + def _fetch_existing_place_classtype_tables(self) -> None: """ Fetch existing place_classtype tables. Fill the table_phrases_to_delete set of the class. @@ -90,7 +113,8 @@ class SPImporter(): for row in db_cursor: self.table_phrases_to_delete.add(row[0]) - def _load_white_and_black_lists(self): + def _load_white_and_black_lists(self) \ + -> Tuple[Mapping[str, Sequence[str]], Mapping[str, Sequence[str]]]: """ Load white and black lists from phrases-settings.json. """ @@ -98,7 +122,7 @@ class SPImporter(): return settings['blackList'], settings['whiteList'] - def _check_sanity(self, phrase): + def _check_sanity(self, phrase: SpecialPhrase) -> bool: """ Check sanity of given inputs in case somebody added garbage in the wiki. If a bad class/type is detected the system will exit with an error. @@ -112,7 +136,7 @@ class SPImporter(): return False return True - def _process_phrase(self, phrase): + def _process_phrase(self, phrase: SpecialPhrase) -> Optional[Tuple[str, str]]: """ Processes the given phrase by checking black and white list and sanity. @@ -140,7 +164,8 @@ class SPImporter(): return (phrase.p_class, phrase.p_type) - def _create_place_classtype_table_and_indexes(self, class_type_pairs): + def _create_classtype_table_and_indexes(self, + class_type_pairs: Iterable[Tuple[str, str]]) -> None: """ Create table place_classtype for each given pair. Also create indexes on place_id and centroid. @@ -183,44 +208,48 @@ class SPImporter(): db_cursor.execute("DROP INDEX idx_placex_classtype") - def _create_place_classtype_table(self, sql_tablespace, phrase_class, phrase_type): + def _create_place_classtype_table(self, sql_tablespace: str, + phrase_class: str, phrase_type: str) -> None: """ - Create table place_classtype of the given phrase_class/phrase_type if doesn't exit. + Create table place_classtype of the given phrase_class/phrase_type + if doesn't exit. """ table_name = _classtype_table(phrase_class, phrase_type) - with self.db_connection.cursor() as db_cursor: - db_cursor.execute(SQL(""" - CREATE TABLE IF NOT EXISTS {{}} {} - AS SELECT place_id AS place_id,st_centroid(geometry) AS centroid FROM placex - WHERE class = {{}} AND type = {{}}""".format(sql_tablespace)) - .format(Identifier(table_name), Literal(phrase_class), - Literal(phrase_type))) - - - def _create_place_classtype_indexes(self, sql_tablespace, phrase_class, phrase_type): + with self.db_connection.cursor() as cur: + cur.execute(SQL("""CREATE TABLE IF NOT EXISTS {} {} AS + SELECT place_id AS place_id, + st_centroid(geometry) AS centroid + FROM placex + WHERE class = %s AND type = %s + """).format(Identifier(table_name), SQL(sql_tablespace)), + (phrase_class, phrase_type)) + + + def _create_place_classtype_indexes(self, sql_tablespace: str, + phrase_class: str, phrase_type: str) -> None: """ Create indexes on centroid and place_id for the place_classtype table. """ - index_prefix = 'idx_place_classtype_{}_{}_'.format(phrase_class, phrase_type) + index_prefix = f'idx_place_classtype_{phrase_class}_{phrase_type}_' base_table = _classtype_table(phrase_class, phrase_type) # Index on centroid if not self.db_connection.index_exists(index_prefix + 'centroid'): with self.db_connection.cursor() as db_cursor: - db_cursor.execute(SQL(""" - CREATE INDEX {{}} ON {{}} USING GIST (centroid) {}""".format(sql_tablespace)) + db_cursor.execute(SQL("CREATE INDEX {} ON {} USING GIST (centroid) {}") .format(Identifier(index_prefix + 'centroid'), - Identifier(base_table)), sql_tablespace) + Identifier(base_table), + SQL(sql_tablespace))) # Index on place_id if not self.db_connection.index_exists(index_prefix + 'place_id'): with self.db_connection.cursor() as db_cursor: - db_cursor.execute(SQL( - """CREATE INDEX {{}} ON {{}} USING btree(place_id) {}""".format(sql_tablespace)) + db_cursor.execute(SQL("CREATE INDEX {} ON {} USING btree(place_id) {}") .format(Identifier(index_prefix + 'place_id'), - Identifier(base_table))) + Identifier(base_table), + SQL(sql_tablespace))) - def _grant_access_to_webuser(self, phrase_class, phrase_type): + def _grant_access_to_webuser(self, phrase_class: str, phrase_type: str) -> None: """ Grant access on read to the table place_classtype for the webuser. """ @@ -230,7 +259,7 @@ class SPImporter(): .format(Identifier(table_name), Identifier(self.config.DATABASE_WEBUSER))) - def _remove_non_existent_tables_from_db(self): + def _remove_non_existent_tables_from_db(self) -> None: """ Remove special phrases which doesn't exist on the wiki anymore. Delete the place_classtype tables.