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Java > Open Source Codes > org > netbeans > modules > languages > parser > StringInput


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.languages.parser;
21
22 import org.netbeans.api.languages.CharInput;
23
24 public class StringInput extends CharInput {
25
26     private String JavaDoc sourceName;
27     private String JavaDoc expression;
28     private int index = 0;
29     private int length;
30
31     public StringInput (String JavaDoc expression, String JavaDoc sourceName) {
32         this.expression = expression;
33         length = expression.length ();
34         this.sourceName = sourceName;
35     }
36
37     public char read () {
38         if (index < length)
39             return expression.charAt (index++);
40         return 0;
41     }
42
43     public void setIndex (int index) {
44         this.index = index;
45     }
46
47     public int getIndex () {
48         return index;
49     }
50
51     public boolean eof () {
52         return index >= length;
53     }
54
55     public char next () {
56         if (index < length)
57             return expression.charAt (index);
58         return 0;
59     }
60
61     public String JavaDoc getString (int from, int to) {
62         return expression.substring (from, to);
63     }
64
65     
66     public String JavaDoc getAsText () {
67         return expression.substring (
68             index,
69             expression.length ()
70         );
71     }
72     
73     public String JavaDoc toString () {
74         int lineNumber = 1;
75         int i = expression.indexOf ('\n');
76         int offset = 0;
77         while (i >= 0 && i < index) {
78             lineNumber++;
79             i = expression.indexOf ('\n', i + 1);
80             if (i >= 0 && (i < index)) offset = i;
81         }
82         return sourceName + ":" + lineNumber + ',' + (index - offset);
83     }
84 }
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