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Java > Open Source Codes > org > apache > lucene > analysis > TokenFilter


1 package org.apache.lucene.analysis;
2
3 /**
4  * Copyright 2004 The Apache Software Foundation
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18
19 import java.io.IOException JavaDoc;
20
21 /** A TokenFilter is a TokenStream whose input is another token stream.
22   <p>
23   This is an abstract class.
24   */
25
26 public abstract class TokenFilter extends TokenStream {
27   /** The source of tokens for this filter. */
28   protected TokenStream input;
29
30   /** Call TokenFilter(TokenStream) instead.
31    * @deprecated */
32   protected TokenFilter() {}
33
34   /** Construct a token stream filtering the given input. */
35   protected TokenFilter(TokenStream input) {
36     this.input = input;
37   }
38
39   /** Close the input TokenStream. */
40   public void close() throws IOException JavaDoc {
41     input.close();
42   }
43
44 }
45
46
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