| // Lucene version compatibility level 8.2.0 |
| using Lucene.Net.Analysis.OpenNlp.Tools; |
| using Lucene.Net.Analysis.Util; |
| using System; |
| using System.Collections.Generic; |
| using System.IO; |
| |
| namespace Lucene.Net.Analysis.OpenNlp |
| { |
| /* |
| * 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="OpenNLPLemmatizerFilter"/>. |
| /// <code> |
| /// <fieldType name="text_opennlp_lemma" class="solr.TextField" positionIncrementGap="100" |
| /// <analyzer> |
| /// <tokenizer class="solr.OpenNLPTokenizerFactory" |
| /// sentenceModel="filename" |
| /// tokenizerModel="filename"/> |
| /// /> |
| /// <filter class="solr.OpenNLPLemmatizerFilterFactory" |
| /// dictionary="filename" |
| /// lemmatizerModel="filename"/> |
| /// </analyzer> |
| /// </fieldType> |
| /// </code> |
| /// </summary> |
| public class OpenNLPLemmatizerFilterFactory : TokenFilterFactory, IResourceLoaderAware |
| { |
| public const string DICTIONARY = "dictionary"; |
| public const string LEMMATIZER_MODEL = "lemmatizerModel"; |
| |
| private readonly string dictionaryFile; |
| private readonly string lemmatizerModelFile; |
| |
| public OpenNLPLemmatizerFilterFactory(IDictionary<string, string> args) |
| : base(args) |
| { |
| dictionaryFile = Get(args, DICTIONARY); |
| lemmatizerModelFile = Get(args, LEMMATIZER_MODEL); |
| |
| if (dictionaryFile == null && lemmatizerModelFile == null) |
| { |
| throw new ArgumentException("Configuration Error: missing parameter: at least one of '" |
| + DICTIONARY + "' and '" + LEMMATIZER_MODEL + "' must be provided."); |
| } |
| |
| if (args.Count > 0) |
| { |
| throw new ArgumentException("Unknown parameters: " + args); |
| } |
| } |
| |
| public override TokenStream Create(TokenStream input) |
| { |
| try |
| { |
| NLPLemmatizerOp lemmatizerOp = OpenNLPOpsFactory.GetLemmatizer(dictionaryFile, lemmatizerModelFile); |
| return new OpenNLPLemmatizerFilter(input, lemmatizerOp); |
| } |
| catch (IOException e) |
| { |
| throw new Exception(e.ToString(), e); |
| } |
| } |
| |
| public virtual void Inform(IResourceLoader loader) |
| { |
| // register models in cache with file/resource names |
| if (dictionaryFile != null) |
| { |
| OpenNLPOpsFactory.GetLemmatizerDictionary(dictionaryFile, loader); |
| } |
| if (lemmatizerModelFile != null) |
| { |
| OpenNLPOpsFactory.GetLemmatizerModel(lemmatizerModelFile, loader); |
| } |
| } |
| } |
| } |