| /* |
| * 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.miscellaneous; |
| |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.miscellaneous.StemmerOverrideFilter.StemmerOverrideMap; |
| import org.apache.lucene.analysis.util.ResourceLoader; |
| import org.apache.lucene.analysis.util.ResourceLoaderAware; |
| import org.apache.lucene.analysis.util.TokenFilterFactory; |
| |
| /** |
| * Factory for {@link StemmerOverrideFilter}. |
| * <pre class="prettyprint"> |
| * <fieldType name="text_dicstem" class="solr.TextField" positionIncrementGap="100"> |
| * <analyzer> |
| * <tokenizer class="solr.WhitespaceTokenizerFactory"/> |
| * <filter class="solr.StemmerOverrideFilterFactory" dictionary="dictionary.txt" ignoreCase="false"/> |
| * </analyzer> |
| * </fieldType></pre> |
| * @since 3.1.0 |
| * @lucene.spi {@value #NAME} |
| */ |
| public class StemmerOverrideFilterFactory extends TokenFilterFactory implements ResourceLoaderAware { |
| |
| /** SPI name */ |
| public static final String NAME = "stemmerOverride"; |
| |
| private StemmerOverrideMap dictionary; |
| private final String dictionaryFiles; |
| private final boolean ignoreCase; |
| |
| /** Creates a new StemmerOverrideFilterFactory */ |
| public StemmerOverrideFilterFactory(Map<String,String> args) { |
| super(args); |
| dictionaryFiles = get(args, "dictionary"); |
| ignoreCase = getBoolean(args, "ignoreCase", false); |
| if (!args.isEmpty()) { |
| throw new IllegalArgumentException("Unknown parameters: " + args); |
| } |
| } |
| |
| @Override |
| public void inform(ResourceLoader loader) throws IOException { |
| if (dictionaryFiles != null) { |
| List<String> files = splitFileNames(dictionaryFiles); |
| if (files.size() > 0) { |
| StemmerOverrideFilter.Builder builder = new StemmerOverrideFilter.Builder(ignoreCase); |
| for (String file : files) { |
| List<String> list = getLines(loader, file.trim()); |
| for (String line : list) { |
| String[] mapping = line.split("\t", 2); |
| builder.add(mapping[0], mapping[1]); |
| } |
| } |
| dictionary = builder.build(); |
| } |
| } |
| } |
| |
| public boolean isIgnoreCase() { |
| return ignoreCase; |
| } |
| |
| @Override |
| public TokenStream create(TokenStream input) { |
| return dictionary == null ? input : new StemmerOverrideFilter(input, dictionary); |
| } |
| } |