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Java > Open Source Codes > org > apache > regexp > CharacterArrayCharacterIterator


1 package org.apache.regexp;
2
3 /*
4  * ====================================================================
5  *
6  * The Apache Software License, Version 1.1
7  *
8  * Copyright (c) 1999 The Apache Software Foundation. All rights
9  * reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright
16  * notice, this list of conditions and the following disclaimer.
17  *
18  * 2. Redistributions in binary form must reproduce the above copyright
19  * notice, this list of conditions and the following disclaimer in
20  * the documentation and/or other materials provided with the
21  * distribution.
22  *
23  * 3. The end-user documentation included with the redistribution, if
24  * any, must include the following acknowlegement:
25  * "This product includes software developed by the
26  * Apache Software Foundation (http://www.apache.org/)."
27  * Alternately, this acknowlegement may appear in the software itself,
28  * if and wherever such third-party acknowlegements normally appear.
29  *
30  * 4. The names "The Jakarta Project", "Jakarta-Regexp", and "Apache Software
31  * Foundation" must not be used to endorse or promote products derived
32  * from this software without prior written permission. For written
33  * permission, please contact apache@apache.org.
34  *
35  * 5. Products derived from this software may not be called "Apache"
36  * nor may "Apache" appear in their names without prior written
37  * permission of the Apache Group.
38  *
39  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
40  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
42  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
45  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
46  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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49  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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51  * ====================================================================
52  *
53  * This software consists of voluntary contributions made by many
54  * individuals on behalf of the Apache Software Foundation. For more
55  * information on the Apache Software Foundation, please see
56  * <http://www.apache.org/>.
57  *
58  */
59
60 /** Encapsulates String
61  *
62  * @author <a HREF="mailto:ales.novak@netbeans.com">Ales Novak</a>
63  */
64 public final class CharacterArrayCharacterIterator implements CharacterIterator
65 {
66     /** encapsulated */
67     private final char[] src;
68     /** offset in the char array */
69     private final int off;
70     /** used portion of the array */
71     private final int len;
72
73     /** @param src - encapsulated String */
74     public CharacterArrayCharacterIterator(char[] src, int off, int len)
75     {
76         this.src = src;
77         this.off = off;
78         this.len = len;
79     }
80
81     /** @return a substring */
82     public String JavaDoc substring(int offset, int length)
83     {
84         return new String JavaDoc(src, off + offset, length);
85     }
86
87     /** @return a substring */
88     public String JavaDoc substring(int offset)
89     {
90         return new String JavaDoc(src, off + offset, len);
91     }
92
93     /** @return a character at the specified position. */
94     public char charAt(int pos)
95     {
96         return src[off + pos];
97     }
98
99     /** @return <tt>true</tt> iff if the specified index is after the end of the character stream */
100     public boolean isEnd(int pos)
101     {
102         return (pos >= len);
103     }
104 }
105
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