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


1 /*
2
3    Copyright 2002 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
22 /**
23  * This class represents a NormalizingReader which handles Strings.
24  *
25  * @author <a HREF="mailto:stephane@hillion.org">Stephane Hillion</a>
26  * @version $Id: StringNormalizingReader.java,v 1.3 2004/08/18 07:15:58 vhardy Exp $
27  */
28 public class StringNormalizingReader extends NormalizingReader {
29
30     /**
31      * The characters.
32      */
33     protected String JavaDoc string;
34
35     /**
36      * The length of the string.
37      */
38     protected int length;
39     
40     /**
41      * The index of the next character.
42      */
43     protected int next;
44
45     /**
46      * The current line in the stream.
47      */
48     protected int line = 1;
49
50     /**
51      * The current column in the stream.
52      */
53     protected int column;
54
55     /**
56      * Creates a new StringNormalizingReader.
57      * @param s The string to read.
58      */
59     public StringNormalizingReader(String JavaDoc s) {
60         string = s;
61         length = s.length();
62     }
63
64     /**
65      * Read a single character. This method will block until a
66      * character is available, an I/O error occurs, or the end of the
67      * stream is reached.
68      */
69     public int read() throws IOException JavaDoc {
70         int result = (length == next) ? -1 : string.charAt(next++);
71         if (result <= 13) {
72             switch (result) {
73             case 13:
74                 column = 0;
75                 line++;
76                 int c = (length == next) ? -1 : string.charAt(next);
77                 if (c == 10) {
78                     next++;
79                 }
80                 return 10;
81                 
82             case 10:
83                 column = 0;
84                 line++;
85             }
86         }
87         return result;
88     }
89
90     /**
91      * Returns the current line in the stream.
92      */
93     public int getLine() {
94         return line;
95     }
96
97     /**
98      * Returns the current column in the stream.
99      */
100     public int getColumn() {
101         return column;
102     }
103
104     /**
105      * Close the stream.
106      */
107     public void close() throws IOException JavaDoc {
108         string = null;
109     }
110 }
111
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