KickJava   Java API By Example, From Geeks To Geeks.

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


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