package org.apache.lucene.analysis.ja;
/*
* 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.io.IOException;
import java.util.HashSet;
import java.util.Set;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.ja.JapanesePartOfSpeechStopFilter;
import org.apache.lucene.analysis.util.*;
/**
* Factory for {@link org.apache.lucene.analysis.ja.JapanesePartOfSpeechStopFilter}.
* <pre class="prettyprint">
* <fieldType name="text_ja" class="solr.TextField">
* <analyzer>
* <tokenizer class="solr.JapaneseTokenizerFactory"/>
* <filter class="solr.JapanesePartOfSpeechStopFilterFactory"
* tags="stopTags.txt"
* enablePositionIncrements="true"/>
* </analyzer>
* </fieldType>
* </pre>
*/
public class JapanesePartOfSpeechStopFilterFactory extends TokenFilterFactory implements ResourceLoaderAware {
private boolean enablePositionIncrements;
private Set<String> stopTags;
@Override
public void inform(ResourceLoader loader) throws IOException {
String stopTagFiles = args.get("tags");
enablePositionIncrements = getBoolean("enablePositionIncrements", false);
stopTags = null;
CharArraySet cas = getWordSet(loader, stopTagFiles, false);
if (cas != null) {
stopTags = new HashSet<String>();
for (Object element : cas) {
char chars[] = (char[]) element;
stopTags.add(new String(chars));
}
}
}
@Override
public TokenStream create(TokenStream stream) {
// if stoptags is null, it means the file is empty
return stopTags == null ? stream : new JapanesePartOfSpeechStopFilter(enablePositionIncrements, stream, stopTags);
}
}