KeywordTokenizer.cs
上传用户:zhangkuixh
上传日期:2013-09-30
资源大小:5473k
文件大小:2k
- /*
- * Copyright 2004-2005 The Apache Software Foundation
- *
- * Licensed 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;
- namespace Lucene.Net.Analysis
- {
-
- /// <summary> Emits the entire input as a single token.</summary>
- public class KeywordTokenizer : Tokenizer
- {
-
- private const int DEFAULT_BUFFER_SIZE = 256;
-
- private bool done;
- private char[] buffer;
-
- public KeywordTokenizer(System.IO.TextReader input) : this(input, DEFAULT_BUFFER_SIZE)
- {
- }
-
- public KeywordTokenizer(System.IO.TextReader input, int bufferSize) : base(input)
- {
- this.buffer = new char[bufferSize];
- this.done = false;
- }
-
- public override Token Next()
- {
- if (!done)
- {
- done = true;
- System.Text.StringBuilder buffer = new System.Text.StringBuilder();
- int length;
- while (true)
- {
- length = input.Read((System.Char[]) this.buffer, 0, this.buffer.Length);
- if (length == - 1)
- break;
-
- buffer.Append(this.buffer, 0, length);
- }
- System.String text = buffer.ToString();
- return new Token(text, 0, text.Length);
- }
- return null;
- }
- }
- }