content: package org.apache.lucene.analysis.ru;
  
  /**
   * 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.
   */
  
  import java.io.IOException;
  
  import org.apache.lucene.analysis.LowerCaseFilter; // for javadoc
  import org.apache.lucene.analysis.TokenFilter;
  import org.apache.lucene.analysis.TokenStream;
  import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
  
  /**
   * Normalizes token text to lower case.
   * @deprecated Use {@link LowerCaseFilter} instead, which has the same
   *  functionality. This filter will be removed in Lucene 4.0
   */
  @Deprecated
  public final class RussianLowerCaseFilter extends TokenFilter
  {
      private CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
     
      public RussianLowerCaseFilter(TokenStream in)
      {
          super(in);
      }
  
      @Override
      public final boolean incrementToken() throws IOException
      {
        if (input.incrementToken()) {
          char[] chArray = termAtt.buffer();
          int chLen = termAtt.length();
          for (int i = 0; i < chLen; i++)
          {
            chArray[i] = Character.toLowerCase(chArray[i]);
          }
          return true;
        } else {
          return false;
        }
      }
  }
  