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.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.core.LowerCaseFilter;
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;
}
}
}