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, 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
"""
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.
# 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()
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.
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.
"""
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.
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.
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.
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 = %s AND type = %s""")
- .format(Identifier(table_name), SQL(sql_tablespace)),
- (phrase_class, 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.
"""
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(Identifier(index_prefix + 'centroid'),
- Identifier(base_table),
- SQL(sql_tablespace)))
+ .format(Identifier(index_prefix + 'centroid'),
+ Identifier(base_table),
+ SQL(sql_tablespace)))
# Index on place_id
if not self.db_connection.index_exists(index_prefix + 'place_id'):
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.
"""
.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.
projects / nominatim.git / blobdiff