/*
* 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 LetterTokenizer
. <fieldType name="text_letter" class="solr.TextField" positionIncrementGap="100">
<analyzer>
<tokenizer class="solr.LetterTokenizerFactory" maxTokenLen="256"/>
</analyzer>
</fieldType>
Options:
- 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
CharTokenizer
::DEFAULT_MAX_TOKEN_LEN
Since: 3.1 @lucene.spi "letter"
/**
* 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 /** SPI name */
public static final String NAME = "letter";
private final int maxTokenLen;
Creates a new LetterTokenizerFactory /** 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);
}
}
@Override
public LetterTokenizer create(AttributeFactory factory) {
return new LetterTokenizer(factory, maxTokenLen);
}
}