| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. 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. For additional information regarding |
| * copyright in this work, please see the NOTICE file in the top level |
| * directory of this distribution. |
| */ |
| /* Created on Jul 20, 2003 */ |
| package org.apache.roller.weblogger.business.search; |
| |
| import java.io.IOException; |
| import java.io.StringReader; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| import org.apache.lucene.index.Term; |
| |
| /** |
| * Class containing helper methods. |
| * |
| * @author Mindaugas Idzelis (min@idzelis.com) |
| */ |
| public final class IndexUtil { |
| |
| private IndexUtil() {} |
| |
| /** |
| * Create a lucene term from the first token of the input string. |
| * |
| * @param field |
| * The lucene document field to create a term with |
| * @param input |
| * The input you wish to convert into a term |
| * |
| * @return Lucene search term |
| */ |
| public static Term getTerm(String field, String input) { |
| if (input == null || field == null) { |
| return null; |
| } |
| Analyzer analyzer = IndexManagerImpl.getAnalyzer(); |
| Term term = null; |
| try { |
| TokenStream tokens = analyzer.tokenStream(field, new StringReader(input)); |
| CharTermAttribute termAtt = tokens.addAttribute(CharTermAttribute.class); |
| tokens.reset(); |
| |
| if (tokens.incrementToken()) { |
| String termt = termAtt.toString(); |
| term = new Term(field, termt); |
| } |
| } catch (IOException e) { |
| // ignored |
| } |
| return term; |
| } |
| |
| } |