| using Lucene.Net.Analysis.Ja.Dict; |
| using Lucene.Net.Analysis.Util; |
| using Lucene.Net.Util; |
| using System; |
| using System.Collections.Generic; |
| using System.IO; |
| using System.Text; |
| |
| namespace Lucene.Net.Analysis.Ja |
| { |
| /* |
| * 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> |
| /// Factory for <see cref="JapaneseTokenizer"/>. |
| /// <code> |
| /// <fieldType name="text_ja" class="solr.TextField"> |
| /// <analyzer> |
| /// <tokenizer class="solr.JapaneseTokenizerFactory" |
| /// mode="NORMAL" |
| /// userDictionary="user.txt" |
| /// userDictionaryEncoding="UTF-8" |
| /// discardPunctuation="true" |
| /// /> |
| /// <filter class="solr.JapaneseBaseFormFilterFactory"/> |
| /// </analyzer> |
| /// </fieldType> |
| /// </code> |
| /// </summary> |
| public class JapaneseTokenizerFactory : TokenizerFactory, IResourceLoaderAware |
| { |
| private const string MODE = "mode"; |
| |
| private const string USER_DICT_PATH = "userDictionary"; |
| |
| private const string USER_DICT_ENCODING = "userDictionaryEncoding"; |
| |
| private const string DISCARD_PUNCTUATION = "discardPunctuation"; // Expert option |
| |
| private UserDictionary userDictionary; |
| |
| private readonly JapaneseTokenizerMode mode; |
| private readonly bool discardPunctuation; |
| private readonly string userDictionaryPath; |
| private readonly string userDictionaryEncoding; |
| |
| /// <summary>Creates a new <see cref="JapaneseTokenizerFactory"/>.</summary> |
| public JapaneseTokenizerFactory(IDictionary<string, string> args) |
| : base(args) |
| { |
| Enum.TryParse(Get(args, MODE, JapaneseTokenizer.DEFAULT_MODE.ToString()), true, out mode); |
| userDictionaryPath = Get(args, USER_DICT_PATH); |
| userDictionaryEncoding = Get(args, USER_DICT_ENCODING); |
| discardPunctuation = GetBoolean(args, DISCARD_PUNCTUATION, true); |
| if (args.Count > 0) |
| { |
| throw new ArgumentException(string.Format(J2N.Text.StringFormatter.CurrentCulture, "Unknown parameters: {0}", args)); |
| } |
| } |
| |
| static JapaneseTokenizerFactory() |
| { |
| #if FEATURE_ENCODINGPROVIDERS |
| // Support for EUC-JP encoding. See: https://docs.microsoft.com/en-us/dotnet/api/system.text.codepagesencodingprovider?view=netcore-2.0 |
| var encodingProvider = System.Text.CodePagesEncodingProvider.Instance; |
| System.Text.Encoding.RegisterProvider(encodingProvider); |
| #endif |
| } |
| |
| public virtual void Inform(IResourceLoader loader) |
| { |
| if (userDictionaryPath != null) |
| { |
| Stream stream = loader.OpenResource(userDictionaryPath); |
| string encoding = userDictionaryEncoding; |
| if (encoding == null) |
| { |
| encoding = Encoding.UTF8.WebName; |
| } |
| Encoding decoder = Encoding.GetEncoding(encoding); |
| TextReader reader = new StreamReader(stream, decoder); |
| userDictionary = new UserDictionary(reader); |
| } |
| else |
| { |
| userDictionary = null; |
| } |
| } |
| |
| public override Tokenizer Create(AttributeSource.AttributeFactory factory, TextReader input) |
| { |
| return new JapaneseTokenizer(factory, input, userDictionary, discardPunctuation, mode); |
| } |
| } |
| } |