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Java > Open Source Codes > org > apache > batik > util > io > ASCIIDecoder


1 /*
2
3    Copyright 2002-2003 The Apache Software Foundation
4
5    Licensed under the Apache License, Version 2.0 (the "License");
6    you may not use this file except in compliance with the License.
7    You may obtain a copy of the License at
8
9        http://www.apache.org/licenses/LICENSE-2.0
10
11    Unless required by applicable law or agreed to in writing, software
12    distributed under the License is distributed on an "AS IS" BASIS,
13    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14    See the License for the specific language governing permissions and
15    limitations under the License.
16
17  */
18 package org.apache.batik.util.io;
19
20 import java.io.IOException JavaDoc;
21 import java.io.InputStream JavaDoc;
22
23 /**
24  * This class represents an object which decodes ASCII characters from
25  * a stream of bytes.
26  *
27  * @author <a HREF="mailto:stephane@hillion.org">Stephane Hillion</a>
28  * @version $Id: ASCIIDecoder.java,v 1.4 2004/08/18 07:15:57 vhardy Exp $
29  */
30 public class ASCIIDecoder extends AbstractCharDecoder {
31     
32     /**
33      * Creates a new ASCIIDecoder.
34      */
35     public ASCIIDecoder(InputStream JavaDoc is) {
36         super(is);
37     }
38
39     /**
40      * Reads the next character.
41      * @return a character or END_OF_STREAM.
42      */
43     public int readChar() throws IOException JavaDoc {
44         if (position == count) {
45             fillBuffer();
46         }
47         if (count == -1) {
48             return END_OF_STREAM;
49         }
50         int result = buffer[position++];
51         if (result < 0) {
52             charError("ASCII");
53         }
54         return result;
55     }
56 }
57
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