org.elasticsearch.index.analysis.StopTokenFilterFactory Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.CharArraySet;
import org.apache.lucene.analysis.StopFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.core.StopAnalyzer;
import org.apache.lucene.search.suggest.analyzing.SuggestStopFilter;
import org.apache.lucene.util.Version;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.IndexSettings;
import java.util.Set;
/**
*
*/
public class StopTokenFilterFactory extends AbstractTokenFilterFactory {
private final CharArraySet stopWords;
private final boolean ignoreCase;
private final boolean removeTrailing;
public StopTokenFilterFactory(IndexSettings indexSettings, Environment env, String name, Settings settings) {
super(indexSettings, name, settings);
this.ignoreCase = settings.getAsBoolean("ignore_case", false);
this.removeTrailing = settings.getAsBoolean("remove_trailing", true);
this.stopWords = Analysis.parseStopWords(env, settings, StopAnalyzer.ENGLISH_STOP_WORDS_SET, ignoreCase);
if (settings.get("enable_position_increments") != null) {
throw new IllegalArgumentException("enable_position_increments is not supported anymore. Please fix your analysis chain");
}
}
@Override
public TokenStream create(TokenStream tokenStream) {
if (removeTrailing) {
return new StopFilter(tokenStream, stopWords);
} else {
return new SuggestStopFilter(tokenStream, stopWords);
}
}
public Set stopWords() {
return stopWords;
}
public boolean ignoreCase() {
return ignoreCase;
}
}