/*
* 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 AttributeSource = Lucene.Net.Util.AttributeSource;
namespace Lucene.Net.Analysis
{
/// A LetterTokenizer is a tokenizer that divides text at non-letters. That's
/// to say, it defines tokens as maximal strings of adjacent letters, as defined
/// by java.lang.Character.isLetter() predicate.
/// Note: this does a decent job for most European languages, but does a terrible
/// job for some Asian languages, where words are not separated by spaces.
///
public class LetterTokenizer:CharTokenizer
{
/// Construct a new LetterTokenizer.
public LetterTokenizer(System.IO.TextReader in_Renamed):base(in_Renamed)
{
}
/// Construct a new LetterTokenizer using a given {@link AttributeSource}.
public LetterTokenizer(AttributeSource source, System.IO.TextReader in_Renamed):base(source, in_Renamed)
{
}
/// Construct a new LetterTokenizer using a given {@link Lucene.Net.Util.AttributeSource.AttributeFactory}.
public LetterTokenizer(AttributeFactory factory, System.IO.TextReader in_Renamed):base(factory, in_Renamed)
{
}
/// Collects only characters which satisfy
/// {@link Character#isLetter(char)}.
///
protected internal override bool IsTokenChar(char c)
{
return System.Char.IsLetter(c);
}
}
}