/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.PorterStemFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.de.GermanLightStemFilter;
import org.apache.lucene.analysis.de.GermanMinimalStemFilter;
import org.apache.lucene.analysis.en.EnglishMinimalStemFilter;
import org.apache.lucene.analysis.en.EnglishPossessiveFilter;
import org.apache.lucene.analysis.en.KStemFilter;
import org.apache.lucene.analysis.es.SpanishLightStemFilter;
import org.apache.lucene.analysis.fi.FinnishLightStemFilter;
import org.apache.lucene.analysis.fr.FrenchLightStemFilter;
import org.apache.lucene.analysis.fr.FrenchMinimalStemFilter;
import org.apache.lucene.analysis.hi.HindiStemFilter;
import org.apache.lucene.analysis.hu.HungarianLightStemFilter;
import org.apache.lucene.analysis.id.IndonesianStemFilter;
import org.apache.lucene.analysis.it.ItalianLightStemFilter;
import org.apache.lucene.analysis.pt.PortugueseLightStemFilter;
import org.apache.lucene.analysis.pt.PortugueseMinimalStemFilter;
import org.apache.lucene.analysis.pt.PortugueseStemFilter;
import org.apache.lucene.analysis.ru.RussianLightStemFilter;
import org.apache.lucene.analysis.snowball.SnowballFilter;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.assistedinject.Assisted;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.settings.IndexSettings;
import org.tartarus.snowball.ext.*;
/**
*/
public class StemmerTokenFilterFactory extends AbstractTokenFilterFactory {
private String language;
@Inject public StemmerTokenFilterFactory(Index index, @IndexSettings Settings indexSettings, @Assisted String name, @Assisted Settings settings) {
super(index, indexSettings, name, settings);
this.language = Strings.capitalize(settings.get("language", settings.get("name", "porter")));
}
@Override public TokenStream create(TokenStream tokenStream) {
if ("armenian".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new ArmenianStemmer());
} else if ("basque".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new BasqueStemmer());
} else if ("catalan".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new CatalanStemmer());
} else if ("danish".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new DanishStemmer());
} else if ("dutch".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new DutchStemmer());
} else if ("english".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new EnglishStemmer());
} else if ("finnish".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new FinnishStemmer());
} else if ("french".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new FrenchStemmer());
} else if ("german".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new GermanStemmer());
} else if ("german2".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new German2Stemmer());
} else if ("hungarian".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new HungarianStemmer());
} else if ("italian".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new ItalianStemmer());
} else if ("kp".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new KpStemmer());
} else if ("kstem".equalsIgnoreCase(language)) {
return new KStemFilter(tokenStream);
} else if ("lovins".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new LovinsStemmer());
} else if ("norwegian".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new NorwegianStemmer());
} else if ("porter".equalsIgnoreCase(language)) {
return new PorterStemFilter(tokenStream);
} else if ("porter2".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new PorterStemmer());
} else if ("portuguese".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new PortugueseStemmer());
} else if ("romanian".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new RomanianStemmer());
} else if ("russian".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new RussianStemmer());
} else if ("spanish".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new SpanishStemmer());
} else if ("swedish".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new SwedishStemmer());
} else if ("turkish".equalsIgnoreCase(language)) {
return new SnowballFilter(tokenStream, new TurkishStemmer());
} else if ("minimal_english".equalsIgnoreCase(language) || "minimalEnglish".equalsIgnoreCase(language)) {
return new EnglishMinimalStemFilter(tokenStream);
} else if ("possessive_english".equalsIgnoreCase(language) || "possessiveEnglish".equalsIgnoreCase(language)) {
return new EnglishPossessiveFilter(tokenStream);
} else if ("light_finish".equalsIgnoreCase(language) || "lightFinish".equalsIgnoreCase(language)) {
return new FinnishLightStemFilter(tokenStream);
} else if ("light_french".equalsIgnoreCase(language) || "lightFrench".equalsIgnoreCase(language)) {
return new FrenchLightStemFilter(tokenStream);
} else if ("minimal_french".equalsIgnoreCase(language) || "minimalFrench".equalsIgnoreCase(language)) {
return new FrenchMinimalStemFilter(tokenStream);
} else if ("light_german".equalsIgnoreCase(language) || "lightGerman".equalsIgnoreCase(language)) {
return new GermanLightStemFilter(tokenStream);
} else if ("minimal_german".equalsIgnoreCase(language) || "minimalGerman".equalsIgnoreCase(language)) {
return new GermanMinimalStemFilter(tokenStream);
} else if ("hindi".equalsIgnoreCase(language)) {
return new HindiStemFilter(tokenStream);
} else if ("light_hungarian".equalsIgnoreCase(language) || "lightHungarian".equalsIgnoreCase(language)) {
return new HungarianLightStemFilter(tokenStream);
} else if ("indonesian".equalsIgnoreCase(language)) {
return new IndonesianStemFilter(tokenStream);
} else if ("light_italian".equalsIgnoreCase(language) || "lightItalian".equalsIgnoreCase(language)) {
return new ItalianLightStemFilter(tokenStream);
} else if ("light_portuguese".equalsIgnoreCase(language) || "lightPortuguese".equalsIgnoreCase(language)) {
return new PortugueseLightStemFilter(tokenStream);
} else if ("minimal_portuguese".equalsIgnoreCase(language) || "minimalPortuguese".equalsIgnoreCase(language)) {
return new PortugueseMinimalStemFilter(tokenStream);
} else if ("portuguese".equalsIgnoreCase(language)) {
return new PortugueseStemFilter(tokenStream);
} else if ("light_russian".equalsIgnoreCase(language) || "lightRussian".equalsIgnoreCase(language)) {
return new RussianLightStemFilter(tokenStream);
} else if ("light_spanish".equalsIgnoreCase(language) || "lightSpanish".equalsIgnoreCase(language)) {
return new SpanishLightStemFilter(tokenStream);
} else if ("light_swedish".equalsIgnoreCase(language) || "lightSwedish".equalsIgnoreCase(language)) {
return new SpanishLightStemFilter(tokenStream);
}
return new SnowballFilter(tokenStream, language);
}
}