/*
* 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;
}
}
}