01: /*
02: (c) Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
03: [See end of file]
04: $Id: Bound.java,v 1.13 2008/01/02 12:07:58 andy_seaborne Exp $
05: */
06:
07: package com.hp.hpl.jena.graph.query;
08:
09: import com.hp.hpl.jena.graph.*;
10:
11: /**
12: An element which represents an already-bound variable.
13:
14: @author hedgehog
15: */
16:
17: public class Bound extends Element {
18: /**
19: Initialise a Bound element: remember <code>n</code> as it is the index into the
20: Domain at which its value is stored.
21: */
22: public Bound(int n) {
23: super (n);
24: }
25:
26: /**
27: Answer true iff the node <code>x</code> matches the previously-seen value at
28: Donain[index]. The matching uses datatype-value semantics, implemented by
29: <code>Node::sameValueAs()</code>.
30: */
31: public boolean match(Domain d, Node x) {
32: return x.sameValueAs(d.getElement(index));
33: }
34:
35: public Node asNodeMatch(Domain d) {
36: return (Node) d.getElement(index);
37: }
38:
39: public String toString() {
40: return "<Bound " + index + ">";
41: }
42: }
43:
44: /*
45: (c) Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
46: All rights reserved.
47:
48: Redistribution and use in source and binary forms, with or without
49: modification, are permitted provided that the following conditions
50: are met:
51:
52: 1. Redistributions of source code must retain the above copyright
53: notice, this list of conditions and the following disclaimer.
54:
55: 2. Redistributions in binary form must reproduce the above copyright
56: notice, this list of conditions and the following disclaimer in the
57: documentation and/or other materials provided with the distribution.
58:
59: 3. The name of the author may not be used to endorse or promote products
60: derived from this software without specific prior written permission.
61:
62: THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
63: IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
64: OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
65: IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
66: INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
67: NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
68: DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
69: THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
70: (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
71: THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
72: */
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