org.elasticsearch.index.analysis.PatternReplaceTokenFilterFactory Maven / Gradle / Ivy
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* the Apache License, Version 2.0 (the "License"); you may
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.index.analysis;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.pattern.PatternReplaceFilter;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.assistedinject.Assisted;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.settings.IndexSettings;
import java.util.regex.Pattern;
@AnalysisSettingsRequired
public class PatternReplaceTokenFilterFactory extends AbstractTokenFilterFactory {
private final Pattern pattern;
private final String replacement;
private final boolean all;
@Inject
public PatternReplaceTokenFilterFactory(Index index, @IndexSettings Settings indexSettings, @Assisted String name, @Assisted Settings settings) {
super(index, indexSettings, name, settings);
String sPattern = settings.get("pattern", null);
if (sPattern == null) {
throw new ElasticsearchIllegalArgumentException("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);
}
}