1 package org.apache.lucene.analysis.ru;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership.
7 * The ASF licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
20 import java.io.IOException;
22 import org.apache.lucene.analysis.LowerCaseFilter; // for javadoc
23 import org.apache.lucene.analysis.TokenFilter;
24 import org.apache.lucene.analysis.TokenStream;
25 import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
28 * Normalizes token text to lower case.
29 * @deprecated Use {@link LowerCaseFilter} instead, which has the same
30 * functionality. This filter will be removed in Lucene 4.0
33 public final class RussianLowerCaseFilter extends TokenFilter
35 private CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
37 public RussianLowerCaseFilter(TokenStream in)
43 public final boolean incrementToken() throws IOException
45 if (input.incrementToken()) {
46 char[] chArray = termAtt.buffer();
47 int chLen = termAtt.length();
48 for (int i = 0; i < chLen; i++)
50 chArray[i] = Character.toLowerCase(chArray[i]);