| 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 org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.AnalyzerWrapper; |
| import org.apache.lucene.analysis.util.CharTokenizer; |
| import org.apache.maven.index.creator.JarFileContentsIndexCreator; |
| |
| /** |
| * A Nexus specific analyzer. Only difference from Lucene's SimpleAnalyzer is that we use LetterOrDigitTokenizer instead |
| * of LowerCaseTokenizer. LetterOrDigitTokenizer does pretty much the same as LowerCaseTokenizer, it normalizes to lower |
| * case letter, but it takes letters and numbers too (as opposed to LowerCaseTokenizer) as token chars. |
| * |
| * @author Eugene Kuleshov |
| * @author cstamas |
| */ |
| public final class NexusAnalyzer |
| extends AnalyzerWrapper |
| { |
| private static final Analyzer CLASS_NAMES_ANALYZER = new Analyzer() |
| { |
| @Override |
| protected TokenStreamComponents createComponents( String fieldName ) |
| { |
| return new TokenStreamComponents( new DeprecatedClassnamesTokenizer() ); |
| } |
| }; |
| |
| private static final Analyzer LETTER_OR_DIGIT_ANALYZER = new Analyzer() |
| { |
| @Override |
| protected TokenStreamComponents createComponents( String filedName ) |
| { |
| return new TokenStreamComponents( new LetterOrDigitTokenizer() ); |
| } |
| }; |
| |
| public NexusAnalyzer() |
| { |
| super( PER_FIELD_REUSE_STRATEGY ); |
| } |
| |
| @Override |
| protected Analyzer getWrappedAnalyzer( String fieldName ) |
| { |
| if ( JarFileContentsIndexCreator.FLD_CLASSNAMES_KW.getKey().equals( fieldName ) ) |
| { |
| // To keep "backward" compatibility, we have to use old flawed tokenizer. |
| return CLASS_NAMES_ANALYZER; |
| } |
| else |
| { |
| return LETTER_OR_DIGIT_ANALYZER; |
| } |
| } |
| |
| // == |
| |
| public static class NoopTokenizer |
| extends CharTokenizer |
| { |
| public NoopTokenizer() |
| { |
| super(); |
| } |
| |
| @Override |
| protected boolean isTokenChar( int i ) |
| { |
| return true; |
| } |
| } |
| |
| @Deprecated |
| public static class DeprecatedClassnamesTokenizer |
| extends CharTokenizer |
| { |
| public DeprecatedClassnamesTokenizer() |
| { |
| super(); |
| } |
| |
| @Override |
| protected boolean isTokenChar( int i ) |
| { |
| return i != '\n'; |
| } |
| |
| @Override |
| protected int normalize( int c ) |
| { |
| return Character.toLowerCase( c ); |
| } |
| } |
| |
| public static class LetterOrDigitTokenizer |
| extends CharTokenizer |
| { |
| public LetterOrDigitTokenizer() |
| { |
| super(); |
| } |
| |
| @Override |
| protected boolean isTokenChar( int c ) |
| { |
| return Character.isLetterOrDigit( c ); |
| } |
| |
| @Override |
| protected int normalize( int c ) |
| { |
| return Character.toLowerCase( c ); |
| } |
| } |
| |
| } |