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


1 /*
2   (c) Copyright 2004, 2005 Hewlett-Packard Development Company, LP, all rights reserved.
3   [See end of file]
4   $Id: Sequence.java,v 1.4 2005/02/21 11:52:30 andy_seaborne Exp $
5 */
6
7 package com.hp.hpl.jena.graph.query.regexptrees;
8
9 import java.util.List JavaDoc;
10
11 /**
12      A sequence of regular expressions. The only access to the constructor is
13      through the <code>create</code> method, which does not construct unit
14      sequences.
15      
16      @author hedgehog
17 */
18 public class Sequence extends MultiOperandTree
19     {
20     protected Sequence( RegexpTree [] operands )
21         { super( operands ); }
22     
23     public static RegexpTree create( List JavaDoc operands )
24         {
25         if (operands.size() == 0)
26             return NON;
27         else if (operands.size() == 1)
28             return (RegexpTree) operands.get(0);
29         else
30             return new Sequence( (RegexpTree []) operands.toArray( new RegexpTree [operands.size()] ));
31         }
32     
33     public boolean equals( Object JavaDoc other )
34         {
35         return other instanceof Sequence && sameOperands( (MultiOperandTree) other );
36         }
37
38     public int hashCode()
39         { return hashCode( 0 ); }
40     
41     public String JavaDoc toString()
42         { return toString( "seq" ); }
43
44     }
45
46
47 /*
48     (c) Copyright 2004, 2005 Hewlett-Packard Development Company, LP
49     All rights reserved.
50     
51     Redistribution and use in source and binary forms, with or without
52     modification, are permitted provided that the following conditions
53     are met:
54     
55     1. Redistributions of source code must retain the above copyright
56        notice, this list of conditions and the following disclaimer.
57     
58     2. Redistributions in binary form must reproduce the above copyright
59        notice, this list of conditions and the following disclaimer in the
60        documentation and/or other materials provided with the distribution.
61     
62     3. The name of the author may not be used to endorse or promote products
63        derived from this software without specific prior written permission.
64     
65     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
66     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
67     OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
68     IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
69     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
70     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
71     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
72     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
73     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
74     THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
75 */
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