01: /*
02: (c) Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
03: [See end of file]
04: $Id: Bind.java,v 1.10 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: A binding instance of a variable. It accepts any node and records it in the supplied
13: Domain at the index allocated to it when it is created.
14:
15: @author hedgehog
16: */
17: public class Bind extends Element {
18: /**
19: Initialise a Bind element: remember the index <code>n</code> which is the
20: place in Domain's where it may store its value.
21: */
22: public Bind(int n) {
23: super (n);
24: }
25:
26: /**
27: Answer true after updating the domain to record the value this element binds.
28: @param d the domain in which to note this element is bound to <code>x</code>.
29: @return true [after side-effecting d]
30: */
31: public boolean match(Domain d, Node x) {
32: d.setElement(index, x);
33: return true;
34: }
35:
36: /**
37: Answer Node.ANY, as a binding occurance of a variable can match anything.
38: */
39: public Node asNodeMatch(Domain d) {
40: return Node.ANY;
41: }
42:
43: public String toString() {
44: return "<Bind " + index + ">";
45: }
46: }
47:
48: /*
49: (c) Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
50: All rights reserved.
51:
52: Redistribution and use in source and binary forms, with or without
53: modification, are permitted provided that the following conditions
54: are met:
55:
56: 1. Redistributions of source code must retain the above copyright
57: notice, this list of conditions and the following disclaimer.
58:
59: 2. Redistributions in binary form must reproduce the above copyright
60: notice, this list of conditions and the following disclaimer in the
61: documentation and/or other materials provided with the distribution.
62:
63: 3. The name of the author may not be used to endorse or promote products
64: derived from this software without specific prior written permission.
65:
66: THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
67: IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
68: OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
69: IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
70: INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
71: NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
72: DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
73: THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
74: (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
75: THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
76: */
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