org.apache.solr.analysis.LowerCaseTokenizerFactory Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of solr-core Show documentation
Show all versions of solr-core Show documentation
Apache Solr (module: core)
/*
* 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.solr.analysis;
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.core.LowerCaseFilterFactory;
import org.apache.lucene.analysis.util.CharTokenizer;
import org.apache.lucene.util.AttributeFactory;
/**
* Factory for {@link LowerCaseTokenizer}.
*
*
* <fieldType name="text_lwrcase" class="solr.TextField" positionIncrementGap="100">
* <analyzer>
* <tokenizer class="solr.LowerCaseTokenizerFactory" maxTokenLen="256"/>
* </analyzer>
* </fieldType>
*
* Options:
*
*
* - maxTokenLen: max token length, should 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_WORD_LEN
*
*
* @deprecated Use {@link org.apache.lucene.analysis.core.LetterTokenizerFactory} and {@link
* LowerCaseFilterFactory}
* @lucene.spi {@value #NAME}
*/
@Deprecated
public class LowerCaseTokenizerFactory extends TokenizerFactory {
/** SPI name */
public static final String NAME = "lowercase";
private final int maxTokenLen;
/** Creates a new LowerCaseTokenizerFactory */
public LowerCaseTokenizerFactory(Map 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 LowerCaseTokenizerFactory() {
throw defaultCtorException();
}
@Override
public LowerCaseTokenizer create(AttributeFactory factory) {
return new LowerCaseTokenizer(factory, maxTokenLen);
}
}