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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.TokenStream;
import org.apache.lucene.analysis.pattern.PatternReplaceFilter;
import org.elasticsearch.env.Environment;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.IndexSettings;
import java.util.regex.Pattern;
public class PatternReplaceTokenFilterFactory extends AbstractTokenFilterFactory {
private final Pattern pattern;
private final String replacement;
private final boolean all;
public PatternReplaceTokenFilterFactory(IndexSettings indexSettings, Environment environment, String name, Settings settings) {
super(indexSettings, name, settings);
String sPattern = settings.get("pattern", null);
if (sPattern == null) {
throw new IllegalArgumentException("pattern is missing for [" + name + "] token filter of type 'pattern_replace'");
}
this.pattern = Regex.compile(sPattern, settings.get("flags"));
this.replacement = settings.get("replacement", "");
this.all = settings.getAsBoolean("all", true);
}
@Override
public TokenStream create(TokenStream tokenStream) {
return new PatternReplaceFilter(tokenStream, pattern, replacement, all);
}
}
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