package org.apache.lucene.analysis.phonetic;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.
*/
import java.util.Arrays;
import java.util.HashSet;
import java.util.Map;
import org.apache.commons.codec.language.bm.Languages.LanguageSet;
import org.apache.commons.codec.language.bm.NameType;
import org.apache.commons.codec.language.bm.PhoneticEngine;
import org.apache.commons.codec.language.bm.RuleType;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.phonetic.BeiderMorseFilter;
import org.apache.lucene.analysis.util.AbstractAnalysisFactory; // javadocs
import org.apache.lucene.analysis.util.TokenFilterFactory;
/**
* Factory for {@link BeiderMorseFilter}.
* <pre class="prettyprint" >
* <fieldType name="text_bm" class="solr.TextField" positionIncrementGap="100">
* <analyzer>
* <tokenizer class="solr.StandardTokenizerFactory"/>
* <filter class="solr.BeiderMorseFilterFactory"
* nameType="GENERIC" ruleType="APPROX"
* concat="true" languageSet="auto"
* </filter>
* </analyzer>
* </fieldType></pre>
*
*/
public class BeiderMorseFilterFactory extends TokenFilterFactory {
private PhoneticEngine engine;
private LanguageSet languageSet;
/** Sole constructor. See {@link AbstractAnalysisFactory} for initialization lifecycle. */
public BeiderMorseFilterFactory() {}
@Override
public void init(Map<String,String> args) {
super.init(args);
// PhoneticEngine = NameType + RuleType + concat
// we use common-codec's defaults: GENERIC + APPROX + true
String nameTypeArg = args.get("nameType");
NameType nameType = (nameTypeArg == null) ? NameType.GENERIC : NameType.valueOf(nameTypeArg);
String ruleTypeArg = args.get("ruleType");
RuleType ruleType = (ruleTypeArg == null) ? RuleType.APPROX : RuleType.valueOf(ruleTypeArg);
boolean concat = getBoolean("concat", true);
engine = new PhoneticEngine(nameType, ruleType, concat);
// LanguageSet: defaults to automagic, otherwise a comma-separated list.
String languageSetArg = args.get("languageSet");
if (languageSetArg == null || languageSetArg.equals("auto")) {
languageSet = null;
} else {
languageSet = LanguageSet.from(new HashSet<String>(Arrays.asList(languageSetArg.split(","))));
}
}
@Override
public TokenStream create(TokenStream input) {
return new BeiderMorseFilter(input, engine, languageSet);
}
}