01: /******************************************************************
02: * File: StateFlag.java
03: * Created by: Dave Reynolds
04: * Created on: 03-May-2003
05: *
06: * (c) Copyright 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
07: * [See end of file]
08: * $Id: StateFlag.java,v 1.9 2008/01/02 12:06:17 andy_seaborne Exp $
09: *****************************************************************/package com.hp.hpl.jena.reasoner.rulesys.impl;
10:
11: /**
12: * A set of constants used to record state information in the
13: * backchaining rule interepreter.
14: *
15: * @author <a href="mailto:der@hplb.hpl.hp.com">Dave Reynolds</a>
16: * @version $Revision: 1.9 $ on $Date: 2008/01/02 12:06:17 $
17: */
18: public class StateFlag {
19:
20: /** Label for printing */
21: private String label;
22:
23: /** Indicates a goal has failed and return no more answers at this time */
24: public static final StateFlag FAIL = new StateFlag("FAIL");
25:
26: /** Indicates that all currently available results have been returned and
27: * the goal should be suspended into new subgoal results have been generated */
28: public static final StateFlag SUSPEND = new StateFlag("SUSPEND");
29:
30: /** Indicates that the goal remains active */
31: public static final StateFlag ACTIVE = new StateFlag("ACTIVE");
32:
33: /** Indicates a fully satisfied goal */
34: public static final StateFlag SATISFIED = new StateFlag("SATISFIED");
35:
36: /** Constructor */
37: private StateFlag(String label) {
38: this .label = label;
39: }
40:
41: /** Print string */
42: public String toString() {
43: return label;
44: }
45: }
46:
47: /*
48: (c) Copyright 2003, 2004, 2005, 2006, 2007, 2008 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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