| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| package org.apache.cassandra.index.sasi.analyzer.filter; |
| |
| import java.util.Locale; |
| |
| import org.tartarus.snowball.SnowballStemmer; |
| |
| /** |
| * Filters for performing Stemming on tokens |
| */ |
| public class StemmingFilters |
| { |
| public static class DefaultStemmingFilter extends FilterPipelineTask<String, String> |
| { |
| private SnowballStemmer stemmer; |
| |
| public DefaultStemmingFilter(Locale locale) |
| { |
| stemmer = StemmerFactory.getStemmer(locale); |
| } |
| |
| public String process(String input) throws Exception |
| { |
| if (input == null || stemmer == null) |
| return input; |
| stemmer.setCurrent(input); |
| return (stemmer.stem()) ? stemmer.getCurrent() : input; |
| } |
| } |
| } |