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#
# Pyserini: Reproducible IR research with sparse and dense representations
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""
This module provides Pyserini's Python interface query building for Anserini.
"""
import logging
from enum import Enum
from pyserini.analysis import get_lucene_analyzer, Analyzer
from pyserini.pyclass import autoclass
logger = logging.getLogger(__name__)
# Wrapper around Lucene clases
JTerm = autoclass('org.apache.lucene.index.Term')
JBooleanClause = autoclass('org.apache.lucene.search.BooleanClause')
JBoostQuery = autoclass('org.apache.lucene.search.BoostQuery')
JTermQuery = autoclass('org.apache.lucene.search.TermQuery')
# Wrappers around Anserini classes
JQueryGeneratorUtils = autoclass('io.anserini.search.query.QueryGeneratorUtils')
class JBooleanClauseOccur(Enum):
should = JQueryGeneratorUtils.getBooleanClauseShould()
must = JQueryGeneratorUtils.getBooleanClauseMust()
must_not = JQueryGeneratorUtils.getBooleanClauseMustNot()
filter = JQueryGeneratorUtils.getBooleanClauseFilter()
def get_boolean_query_builder():
"""Get a BooleanQueryBuilder object.
Returns
-------
JBooleanQueryBuilder
"""
return JQueryGeneratorUtils.getBooleanQueryBuilder()
def get_term_query(term, field="contents", analyzer=get_lucene_analyzer()):
"""Searches the collection.
Parameters
----------
term : str
The query term string.
field : str
Field to search.
analyzer : Analyzer
Analyzer to use for tokenizing the query term.
Returns
-------
JTermQuery
"""
analyzer = Analyzer(analyzer)
return JTermQuery(JTerm(field, analyzer.analyze(term)[0]))
def get_boost_query(query, boost):
"""Get boost query.
Parameters
----------
query : str
The query object to boost.
boost : float
Score multiplier.
Returns
-------
JBoostQuery
"""
return JBoostQuery(query, boost)
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