TokenStream.cs
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上传日期:2013-09-30
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- /*
- * Copyright 2004 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>A TokenStream enumerates the sequence of tokens, either from
- /// fields of a document or from query text.
- /// <p>
- /// This is an abstract class. Concrete subclasses are:
- /// <ul>
- /// <li>{@link Tokenizer}, a TokenStream
- /// whose input is a Reader; and
- /// <li>{@link TokenFilter}, a TokenStream
- /// whose input is another TokenStream.
- /// </ul>
- /// </summary>
-
- public abstract class TokenStream
- {
- /// <summary>Returns the next token in the stream, or null at EOS. </summary>
- public abstract Token Next();
-
- /// <summary>Releases resources associated with this stream. </summary>
- public virtual void Close()
- {
- }
- }
- }