# ====================================================================
# 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 PythonTokenFilter
#
# A TokenFilter extension
#
class PositionalStopFilter(PythonTokenFilter):
def __init__(self, tokenStream, stopWords):
super(PositionalStopFilter, self).__init__(tokenStream)
self.input = tokenStream
self.stopWords = stopWords
def next(self):
increment = 0
for token in self.input:
if not token.termText() in self.stopWords:
token.setPositionIncrement(token.getPositionIncrement() +
increment)
return token
increment += 1
return None
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