| package org.apache.maven.index.context; |
| |
| /* |
| * 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.io.Reader; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.util.CharTokenizer; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.Tokenizer; |
| import org.apache.lucene.analysis.standard.StandardAnalyzer; |
| import org.apache.lucene.util.Version; |
| import org.apache.maven.index.ArtifactInfo; |
| |
| /** |
| * A Nexus specific <a |
| * href="http://lucene.apache.org/java/2_4_0/api/core/org/apache/lucene/analysis/Analyzer.html">Lucene Analyzer</a> used |
| * to produce legacy index transfer format |
| * |
| * @author Jason van Zyl |
| */ |
| public final class NexusLegacyAnalyzer |
| extends Analyzer |
| { |
| private static final Analyzer DEFAULT_ANALYZER = new StandardAnalyzer( Version.LUCENE_46 ); |
| |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName, Reader reader) |
| { |
| try |
| { |
| return new TokenStreamComponents((Tokenizer) tokenizer(fieldName, reader)); |
| } |
| catch (IOException ex) |
| { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| |
| protected TokenStream tokenizer( String field, final Reader reader ) throws IOException |
| { |
| if ( !isTextField( field ) ) |
| { |
| return new CharTokenizer(Version.LUCENE_46, reader ) |
| { |
| @Override |
| protected boolean isTokenChar(int c ) |
| { |
| return Character.isLetterOrDigit( c ); |
| } |
| |
| @Override |
| protected int normalize(int c ) |
| { |
| return Character.toLowerCase( c ); |
| } |
| }; |
| } |
| else |
| { |
| return DEFAULT_ANALYZER.tokenStream(field, reader ); |
| } |
| } |
| |
| protected boolean isTextField( String field ) |
| { |
| return ArtifactInfo.NAME.equals( field ) || ArtifactInfo.DESCRIPTION.equals( field ) |
| || ArtifactInfo.NAMES.equals( field ); |
| |
| } |
| |
| |
| } |