/* * 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 org.apache.lucene.analysis.util.CharTokenizer; import org.apache.lucene.analysis.util.TokenizerFactory; import org.apache.lucene.util.AttributeFactory; import java.util.Map; import static org.apache.lucene.analysis.standard.StandardTokenizer.MAX_TOKEN_LENGTH_LIMIT; /** * 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</li> * </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); } }