org.elasticsearch.index.analysis.PatternReplaceCharFilterFactory 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.pattern.PatternReplaceCharFilter;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
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 java.io.Reader;
import java.util.regex.Pattern;
@AnalysisSettingsRequired
public class PatternReplaceCharFilterFactory extends AbstractCharFilterFactory {
private final Pattern pattern;
private final String replacement;
@Inject
public PatternReplaceCharFilterFactory(Index index, @IndexSettings Settings indexSettings, @Assisted String name, @Assisted Settings settings) {
super(index, indexSettings, name);
if (!Strings.hasLength(settings.get("pattern"))) {
throw new ElasticsearchIllegalArgumentException("pattern is missing for [" + name + "] char filter of type 'pattern_replace'");
}
pattern = Pattern.compile(settings.get("pattern"));
replacement = settings.get("replacement", ""); // when not set or set to "", use "".
}
public Pattern getPattern() {
return pattern;
}
public String getReplacement() {
return replacement;
}
@Override
public Reader create(Reader tokenStream) {
return new PatternReplaceCharFilter(pattern, replacement, tokenStream);
}
}