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