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Java > Open Source Codes > com > hp > hpl > jena > reasoner > rulesys > impl > LPInterpreterContext


1 /******************************************************************
2  * File: LPInterpeterContext.java
3  * Created by: Dave Reynolds
4  * Created on: 09-Aug-2003
5  *
6  * (c) Copyright 2003, 2004, 2005 Hewlett-Packard Development Company, LP
7  * [See end of file]
8  * $Id: LPInterpreterContext.java,v 1.4 2005/02/21 12:17:55 andy_seaborne Exp $
9  *****************************************************************/
10 package com.hp.hpl.jena.reasoner.rulesys.impl;
11
12 /**
13  * The context in which an LPInterpreter instance is running.
14  * The context the entity that should be notified when a branch has been
15  * suspended awaiting further results for a given generator.
16  *
17  * @author <a HREF="mailto:der@hplb.hpl.hp.com">Dave Reynolds</a>
18  * @version $Revision: 1.4 $ on $Date: 2005/02/21 12:17:55 $
19  */
20 public interface LPInterpreterContext extends LPInterpreterState {
21
22     /** Notify this context that a branch was suspended awaiting futher
23      * results for the given choice point. */
24     public void notifyBlockedOn(ConsumerChoicePointFrame ccp);
25     
26     /** Test if one of our top level choice points is ready to be reactivated */
27     public boolean isReady();
28     
29     /** Notify this context that the given choice point has terminated
30      * and can be remove from the wait list. */
31     public void notifyFinished(ConsumerChoicePointFrame ccp);
32     
33     /** Called by a generating choice point to indicate we can be run
34      * because the indicated choice point is ready. */
35     public void setReady(ConsumerChoicePointFrame ccp);
36
37 }
38
39
40
41 /*
42     (c) Copyright 2003, 2004, 2005 Hewlett-Packard Development Company, LP
43     All rights reserved.
44
45     Redistribution and use in source and binary forms, with or without
46     modification, are permitted provided that the following conditions
47     are met:
48
49     1. Redistributions of source code must retain the above copyright
50        notice, this list of conditions and the following disclaimer.
51
52     2. Redistributions in binary form must reproduce the above copyright
53        notice, this list of conditions and the following disclaimer in the
54        documentation and/or other materials provided with the distribution.
55
56     3. The name of the author may not be used to endorse or promote products
57        derived from this software without specific prior written permission.
58
59     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
60     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
61     OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
62     IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
63     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
64     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
65     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
66     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
67     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
68     THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
69 */
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