/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.index.analysis;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.snowball.SnowballFilter;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.IndexSettings;
/**
* Real work actually done here by Sebastian on the Elasticsearch mailing list
* http://elasticsearch-users.115913.n3.nabble.com/Using-the-Snowball-stemmers-tp2126106p2127111.html
*/
public class SnowballTokenFilterFactory extends AbstractTokenFilterFactory {
private String language;
public SnowballTokenFilterFactory(IndexSettings indexSettings, Environment environment, String name, Settings settings) {
super(indexSettings, name, settings);
this.language = Strings.capitalize(settings.get("language", settings.get("name", "English")));
}
@Override
public TokenStream create(TokenStream tokenStream) {
return new SnowballFilter(tokenStream, language);
}
}