/*
*
* 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.
*
*/
using System;
using Lucene.Net.Analysis;
using Lucene.Net.Analysis.Tokenattributes;
namespace Lucene.Net.Analysis.Ru
{
///
/// Normalizes token text to lower case.
///
[Obsolete("Use LowerCaseFilter instead, which has the same functionality. This filter will be removed in Lucene 4.0")]
public sealed class RussianLowerCaseFilter : TokenFilter
{
private ITermAttribute termAtt;
public RussianLowerCaseFilter(TokenStream _in)
: base(_in)
{
termAtt = AddAttribute();
}
public sealed override bool IncrementToken()
{
if (input.IncrementToken())
{
char[] chArray = termAtt.TermBuffer();
int chLen = termAtt.TermLength();
for (int i = 0; i < chLen; i++)
{
chArray[i] = char.ToLower(chArray[i]);
}
return true;
}
else
{
return false;
}
}
}
}