/*
* 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.
*/
package org.apache.mahout.analysis;
import java.io.Reader;
import java.util.Set;
import org.apache.lucene.analysis.LowerCaseFilter;
import org.apache.lucene.analysis.StopAnalyzer;
import org.apache.lucene.analysis.StopFilter;
import org.apache.lucene.analysis.StopwordAnalyzerBase;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.standard.StandardFilter;
import org.apache.lucene.analysis.wikipedia.WikipediaTokenizer;
import org.apache.lucene.util.Version;
public class WikipediaAnalyzer extends StopwordAnalyzerBase {
public WikipediaAnalyzer() {
super(Version.LUCENE_31, StopAnalyzer.ENGLISH_STOP_WORDS_SET);
}
public WikipediaAnalyzer(Set<?> stopSet) {
super(Version.LUCENE_31, stopSet);
}
@Override
protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
Tokenizer tokenizer = new WikipediaTokenizer(reader);
TokenStream result = new StandardFilter(Version.LUCENE_31, tokenizer);
result = new LowerCaseFilter(Version.LUCENE_31, result);
result = new StopFilter(Version.LUCENE_31, result, stopwords);
return new TokenStreamComponents(tokenizer, result);
}
}