# ====================================================================
# 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.
# ====================================================================
from lucene import \
LowerCaseFilter, StopFilter, Version, \
StandardAnalyzer, StandardTokenizer, StandardFilter, PythonAnalyzer
from lia.analysis.synonym.SynonymFilter import SynonymFilter
#
# An Analyzer extension
#
class SynonymAnalyzer(PythonAnalyzer):
def __init__(self, engine):
super(SynonymAnalyzer, self).__init__()
self.engine = engine
def tokenStream(self, fieldName, reader):
tokenStream = LowerCaseFilter(StandardFilter(StandardTokenizer(Version.LUCENE_CURRENT, reader)))
tokenStream = StopFilter(True, tokenStream,
StandardAnalyzer.STOP_WORDS_SET)
return SynonymFilter(tokenStream, self.engine)
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