penalize name token splitting when phrases are used

[nominatim.git] / nominatim / tokenizer / icu_rule_loader.py

diff --git a/nominatim/tokenizer/icu_rule_loader.py b/nominatim/tokenizer/icu_rule_loader.py
index cf9fdb88ac16fa96ea2e6a5cda2a4e1afb43d5f5..4c36282ca54bfbd3526d24ead471a3e9fe9dbc33 100644 (file)
--- a/nominatim/tokenizer/icu_rule_loader.py
+++ b/nominatim/tokenizer/icu_rule_loader.py
@@ -8,18 +8,19 @@
 Helper class to create ICU rules from a configuration file.
 """
 from typing import Mapping, Any, Dict, Optional
-import importlib
 import io
 import json
 import logging
 
+from icu import Transliterator
+
 from nominatim.config import flatten_config_list, Configuration
 from nominatim.db.properties import set_property, get_property
 from nominatim.db.connection import Connection
 from nominatim.errors import UsageError
 from nominatim.tokenizer.place_sanitizer import PlaceSanitizer
 from nominatim.tokenizer.icu_token_analysis import ICUTokenAnalysis
-from nominatim.tokenizer.token_analysis.base import AnalysisModule, Analyser
+from nominatim.tokenizer.token_analysis.base import AnalysisModule, Analyzer
 import nominatim.data.country_info
 
 LOG = logging.getLogger()
@@ -136,6 +137,11 @@ class ICURuleLoader:
         if not isinstance(self.analysis_rules, list):
             raise UsageError("Configuration section 'token-analysis' must be a list.")
 
+        norm = Transliterator.createFromRules("rule_loader_normalization",
+                                              self.normalization_rules)
+        trans = Transliterator.createFromRules("rule_loader_transliteration",
+                                              self.transliteration_rules)
+
         for section in self.analysis_rules:
             name = section.get('id', None)
             if name in self.analysis:
@@ -145,7 +151,8 @@ class ICURuleLoader:
                     LOG.fatal("ICU tokenizer configuration has two token "
                               "analyzers with id '%s'.", name)
                 raise UsageError("Syntax error in ICU tokenizer config.")
-            self.analysis[name] = TokenAnalyzerRule(section, self.normalization_rules)
+            self.analysis[name] = TokenAnalyzerRule(section, norm, trans,
+                                                    self.config)
 
 
     @staticmethod
@@ -169,16 +176,21 @@ class TokenAnalyzerRule:
         and creates a new token analyzer on request.
     """
 
-    def __init__(self, rules: Mapping[str, Any], normalization_rules: str) -> None:
-        # Find the analysis module
-        module_name = 'nominatim.tokenizer.token_analysis.' \
-                      + _get_section(rules, 'analyzer').replace('-', '_')
-        self._analysis_mod: AnalysisModule = importlib.import_module(module_name)
+    def __init__(self, rules: Mapping[str, Any],
+                 normalizer: Any, transliterator: Any,
+                 config: Configuration) -> None:
+        analyzer_name = _get_section(rules, 'analyzer')
+        if not analyzer_name or not isinstance(analyzer_name, str):
+            raise UsageError("'analyzer' parameter needs to be simple string")
+
+        self._analysis_mod: AnalysisModule = \
+            config.load_plugin_module(analyzer_name, 'nominatim.tokenizer.token_analysis')
+
+        self.config = self._analysis_mod.configure(rules, normalizer,
+                                                   transliterator)
 
-        # Load the configuration.
-        self.config = self._analysis_mod.configure(rules, normalization_rules)
 
-    def create(self, normalizer: Any, transliterator: Any) -> Analyser:
+    def create(self, normalizer: Any, transliterator: Any) -> Analyzer:
         """ Create a new analyser instance for the given rule.
         """
         return self._analysis_mod.create(normalizer, transliterator, self.config)