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WhitespaceTokenizer.cs
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WhitespaceTokenizer.cs
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// Lucene version compatibility level 4.8.1
using J2N;
using Lucene.Net.Analysis.Util;
using Lucene.Net.Util;
using System.IO;
namespace Lucene.Net.Analysis.Core
{
/*
* 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.
*/
/// <summary>
/// A <see cref="WhitespaceTokenizer"/> is a tokenizer that divides text at whitespace.
/// Adjacent sequences of non-Whitespace characters form tokens.
/// <para>
/// You must specify the required <see cref="LuceneVersion"/> compatibility when creating
/// <see cref="WhitespaceTokenizer"/>:
/// <list type="bullet">
/// <item><description>As of 3.1, <see cref="CharTokenizer"/> uses an int based API to normalize and
/// detect token characters. See <see cref="CharTokenizer.IsTokenChar(int)"/> and
/// <see cref="CharTokenizer.Normalize(int)"/> for details.</description></item>
/// </list>
/// </para>
/// </summary>
public sealed class WhitespaceTokenizer : CharTokenizer
{
/// Construct a new <see cref="WhitespaceTokenizer"/>.
/// <param name="matchVersion"> <see cref="LuceneVersion"/> to match</param>
/// <param name="in">
/// the input to split up into tokens </param>
public WhitespaceTokenizer(LuceneVersion matchVersion, TextReader @in)
: base(matchVersion, @in)
{
}
/// <summary>
/// Construct a new <see cref="WhitespaceTokenizer"/> using a given
/// <see cref="AttributeSource.AttributeFactory"/>.
/// </summary>
/// <param name="matchVersion"><see cref="LuceneVersion"/> to match</param>
/// <param name="factory">
/// the attribute factory to use for this <see cref="Tokenizer"/> </param>
/// <param name="in">
/// the input to split up into tokens </param>
public WhitespaceTokenizer(LuceneVersion matchVersion, AttributeFactory factory, TextReader @in)
: base(matchVersion, factory, @in)
{
}
/// <summary>
/// Collects only characters which do not satisfy
/// <see cref="char.IsWhiteSpace(char)"/>.
/// </summary>
protected override bool IsTokenChar(int c)
{
return !Character.IsWhiteSpace(c);
}
}
}