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Java > Open Source Codes > com > hp > hpl > jena > graph > query > regexptrees > BackReference


1 /*
2   (c) Copyright 2004, 2005 Hewlett-Packard Development Company, LP, all rights reserved.
3   [See end of file]
4   $Id: BackReference.java,v 1.2 2005/02/21 11:52:28 andy_seaborne Exp $
5 */
6 package com.hp.hpl.jena.graph.query.regexptrees;
7
8 /**
9      BackReference - class describing back-references in regular expressions.
10      @author kers
11 */
12 public class BackReference extends RegexpTree
13     {
14     protected int index;
15     
16     public BackReference( int n )
17         { this.index = n; }
18     
19     public int getIndex()
20         { return index; }
21
22     public boolean equals( Object JavaDoc other )
23         { return other instanceof BackReference && index == ((BackReference) other).index; }
24
25     public int hashCode()
26         { return index; }
27
28     public String JavaDoc toString()
29         { return "<back " + index + ">"; }
30     }
31
32
33 /*
34     (c) Copyright 2004, 2005 Hewlett-Packard Development Company, LP
35     All rights reserved.
36     
37     Redistribution and use in source and binary forms, with or without
38     modification, are permitted provided that the following conditions
39     are met:
40     
41     1. Redistributions of source code must retain the above copyright
42        notice, this list of conditions and the following disclaimer.
43     
44     2. Redistributions in binary form must reproduce the above copyright
45        notice, this list of conditions and the following disclaimer in the
46        documentation and/or other materials provided with the distribution.
47     
48     3. The name of the author may not be used to endorse or promote products
49        derived from this software without specific prior written permission.
50     
51     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
52     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
53     OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
54     IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
55     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
56     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
60     THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 */
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