| using Lucene.Net.Util; |
| using System.IO; |
| |
| namespace Lucene.Net.Analysis.Core |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// An <see cref="Analyzer"/> that filters <see cref="LetterTokenizer"/> |
| /// with <see cref="LowerCaseFilter"/> |
| /// <para> |
| /// You must specify the required <see cref="LuceneVersion"/> compatibility |
| /// when creating <see cref="Util.CharTokenizer"/>: |
| /// <list type="bullet"> |
| /// <item><description>As of 3.1, <see cref="LowerCaseTokenizer"/> uses an int based API to normalize and |
| /// detect token codepoints. See <see cref="Util.CharTokenizer.IsTokenChar(int)"/> and |
| /// <see cref="Util.CharTokenizer.Normalize(int)"/> for details.</description></item> |
| /// </list> |
| /// </para> |
| /// </summary> |
| public sealed class SimpleAnalyzer : Analyzer |
| { |
| private readonly LuceneVersion matchVersion; |
| |
| /// <summary> |
| /// Creates a new <see cref="SimpleAnalyzer"/> </summary> |
| /// <param name="matchVersion"> <see cref="LuceneVersion"/> to match </param> |
| public SimpleAnalyzer(LuceneVersion matchVersion) |
| { |
| this.matchVersion = matchVersion; |
| } |
| |
| protected internal override TokenStreamComponents CreateComponents(string fieldName, TextReader reader) |
| { |
| return new TokenStreamComponents(new LowerCaseTokenizer(matchVersion, reader)); |
| } |
| } |
| } |