| /* |
| * 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.core; |
| |
| import static org.apache.lucene.analysis.standard.StandardTokenizer.MAX_TOKEN_LENGTH_LIMIT; |
| |
| import java.util.Map; |
| import org.apache.lucene.analysis.TokenizerFactory; |
| import org.apache.lucene.analysis.util.CharTokenizer; |
| import org.apache.lucene.util.AttributeFactory; |
| |
| /** |
| * Factory for {@link LetterTokenizer}. |
| * |
| * <pre class="prettyprint"> |
| * <fieldType name="text_letter" class="solr.TextField" positionIncrementGap="100"> |
| * <analyzer> |
| * <tokenizer class="solr.LetterTokenizerFactory" maxTokenLen="256"/> |
| * </analyzer> |
| * </fieldType></pre> |
| * |
| * Options: |
| * |
| * <ul> |
| * <li>maxTokenLen: max token length, must be greater than 0 and less than MAX_TOKEN_LENGTH_LIMIT |
| * (1024*1024). It is rare to need to change this else {@link |
| * CharTokenizer}::DEFAULT_MAX_TOKEN_LEN |
| * </ul> |
| * |
| * @since 3.1 |
| * @lucene.spi {@value #NAME} |
| */ |
| public class LetterTokenizerFactory extends TokenizerFactory { |
| |
| /** SPI name */ |
| public static final String NAME = "letter"; |
| |
| private final int maxTokenLen; |
| |
| /** Creates a new LetterTokenizerFactory */ |
| public LetterTokenizerFactory(Map<String, String> args) { |
| super(args); |
| maxTokenLen = getInt(args, "maxTokenLen", CharTokenizer.DEFAULT_MAX_WORD_LEN); |
| if (maxTokenLen > MAX_TOKEN_LENGTH_LIMIT || maxTokenLen <= 0) { |
| throw new IllegalArgumentException( |
| "maxTokenLen must be greater than 0 and less than " |
| + MAX_TOKEN_LENGTH_LIMIT |
| + " passed: " |
| + maxTokenLen); |
| } |
| if (!args.isEmpty()) { |
| throw new IllegalArgumentException("Unknown parameters: " + args); |
| } |
| } |
| |
| /** Default ctor for compatibility with SPI */ |
| public LetterTokenizerFactory() { |
| throw defaultCtorException(); |
| } |
| |
| @Override |
| public LetterTokenizer create(AttributeFactory factory) { |
| return new LetterTokenizer(factory, maxTokenLen); |
| } |
| } |