| /* |
| * 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. |
| */ |
| |
| package org.apache.lucene.analysis.opennlp; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import org.apache.lucene.analysis.TokenFilterFactory; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.opennlp.tools.NLPLemmatizerOp; |
| import org.apache.lucene.analysis.opennlp.tools.OpenNLPOpsFactory; |
| import org.apache.lucene.util.ResourceLoader; |
| import org.apache.lucene.util.ResourceLoaderAware; |
| |
| /** |
| * Factory for {@link OpenNLPLemmatizerFilter}. |
| * |
| * <pre class="prettyprint"> |
| * <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></pre> |
| * |
| * @since 7.3.0 |
| * @lucene.spi {@value #NAME} |
| */ |
| public class OpenNLPLemmatizerFilterFactory extends TokenFilterFactory |
| implements ResourceLoaderAware { |
| |
| /** SPI name */ |
| public static final String NAME = "openNlpLemmatizer"; |
| |
| public static final String DICTIONARY = "dictionary"; |
| public static final String LEMMATIZER_MODEL = "lemmatizerModel"; |
| |
| private final String dictionaryFile; |
| private final String lemmatizerModelFile; |
| |
| public OpenNLPLemmatizerFilterFactory(Map<String, String> args) { |
| super(args); |
| dictionaryFile = get(args, DICTIONARY); |
| lemmatizerModelFile = get(args, LEMMATIZER_MODEL); |
| |
| if (dictionaryFile == null && lemmatizerModelFile == null) { |
| throw new IllegalArgumentException( |
| "Configuration Error: missing parameter: at least one of '" |
| + DICTIONARY |
| + "' and '" |
| + LEMMATIZER_MODEL |
| + "' must be provided."); |
| } |
| |
| if (!args.isEmpty()) { |
| throw new IllegalArgumentException("Unknown parameters: " + args); |
| } |
| } |
| |
| /** Default ctor for compatibility with SPI */ |
| public OpenNLPLemmatizerFilterFactory() { |
| throw defaultCtorException(); |
| } |
| |
| @Override |
| public OpenNLPLemmatizerFilter create(TokenStream in) { |
| try { |
| NLPLemmatizerOp lemmatizerOp = |
| OpenNLPOpsFactory.getLemmatizer(dictionaryFile, lemmatizerModelFile); |
| return new OpenNLPLemmatizerFilter(in, lemmatizerOp); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public void inform(ResourceLoader loader) throws IOException { |
| // register models in cache with file/resource names |
| if (dictionaryFile != null) { |
| OpenNLPOpsFactory.getLemmatizerDictionary(dictionaryFile, loader); |
| } |
| if (lemmatizerModelFile != null) { |
| OpenNLPOpsFactory.getLemmatizerModel(lemmatizerModelFile, loader); |
| } |
| } |
| } |