| /* |
| * 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.oodt.cas.filemgr.tools; |
| |
| //JDK imports |
| import java.io.Reader; |
| import java.util.Set; |
| |
| //Lucene imports |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.StopAnalyzer; |
| import org.apache.lucene.analysis.StopFilter; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.WhitespaceTokenizer; |
| import org.apache.lucene.analysis.standard.StandardFilter; |
| import org.apache.lucene.analysis.standard.StandardTokenizer; |
| |
| /** |
| * |
| * @author woollard |
| * @version $Revision$ |
| * |
| * <p> |
| * An analyzer used in the CatalogSearch program. |
| * </p> |
| * |
| */ |
| public class CASAnalyzer extends Analyzer { |
| private Set stopSet; |
| |
| /** |
| * An array containing some common English words that are usually not useful |
| * for searching. |
| */ |
| public static final String[] STOP_WORDS = StopAnalyzer.ENGLISH_STOP_WORDS; |
| |
| /** Builds an analyzer. */ |
| public CASAnalyzer() { |
| this(STOP_WORDS); |
| } |
| |
| /** Builds an analyzer with the given stop words. */ |
| public CASAnalyzer(String[] stopWords) { |
| stopSet = StopFilter.makeStopSet(stopWords); |
| } |
| |
| /** |
| * Constructs a {@link StandardTokenizer} filtered by a {@link |
| * StandardFilter}, a {@link LowerCaseFilter} and a {@link StopFilter}. |
| */ |
| public TokenStream tokenStream(String fieldName, Reader reader) { |
| TokenStream result = new WhitespaceTokenizer(reader); |
| result = new StandardFilter(result); |
| result = new StopFilter(result, stopSet); |
| return result; |
| } |
| } |