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/*
* 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.Analyzer;
import org.apache.lucene.analysis.CharArraySet;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.IndexSettings;
import java.util.regex.Pattern;
public class PatternAnalyzerProvider extends AbstractIndexAnalyzerProvider {
private final PatternAnalyzer analyzer;
public PatternAnalyzerProvider(IndexSettings indexSettings, Environment env, String name, Settings settings) {
super(indexSettings, name, settings);
final CharArraySet defaultStopwords = CharArraySet.EMPTY_SET;
boolean lowercase =
settings.getAsBooleanLenientForPreEs6Indices(indexSettings.getIndexVersionCreated(), "lowercase", true, deprecationLogger);
CharArraySet stopWords = Analysis.parseStopWords(env, indexSettings.getIndexVersionCreated(), settings, defaultStopwords);
String sPattern = settings.get("pattern", "\\W+" /*PatternAnalyzer.NON_WORD_PATTERN*/);
if (sPattern == null) {
throw new IllegalArgumentException("Analyzer [" + name + "] of type pattern must have a `pattern` set");
}
Pattern pattern = Regex.compile(sPattern, settings.get("flags"));
analyzer = new PatternAnalyzer(pattern, lowercase, stopWords);
}
@Override
public PatternAnalyzer get() {
return analyzer;
}
}