1 /*
2 * The contents of this file are subject to the BT "ZEUS" Open Source
3 * Licence (L77741), Version 1.0 (the "Licence"); you may not use this file
4 * except in compliance with the Licence. You may obtain a copy of the Licence
5 * from $ZEUS_INSTALL/licence.html or alternatively from
6 * http://www.labs.bt.com/projects/agents/zeus/licence.htm
7 *
8 * Except as stated in Clause 7 of the Licence, software distributed under the
9 * Licence is distributed WITHOUT WARRANTY OF ANY KIND, either express or
10 * implied. See the Licence for the specific language governing rights and
11 * limitations under the Licence.
12 *
13 * The Original Code is within the package zeus.*.
14 * The Initial Developer of the Original Code is British Telecommunications
15 * public limited company, whose registered office is at 81 Newgate Street,
16 * London, EC1A 7AJ, England. Portions created by British Telecommunications
17 * public limited company are Copyright 1996-9. All Rights Reserved.
18 *
19 * THIS NOTICE MUST BE INCLUDED ON ANY COPY OF THIS FILE
20 */
21 /*
22 * @(#)s9.java 1.03b
23 */
24
25
26 package zeus.actors.graphs;
27
28 import java.util.*;
29 import zeus.util.*;
30 import zeus.concepts.*;
31 import zeus.actors.*;
32 import zeus.actors.rtn.*;
33 import zeus.actors.rtn.util.*;
34
35 public class s9 extends Node {
36 /***
37 This node rejects the proposals of some 'child' agents
38 during a negotiation dialogue
39 */
40
41 public s9() {
42 super("s9");
43 }
44 // ST 050500 1.03bB node description due to CVB
45 private String node_desc = "do/reject proposals ; do/refuse cfp";
46
47
48 public final String getDesc()
49 {return node_desc;}
50
51
52 public final void setDesc(String node_desc)
53 {this.node_desc = node_desc;}
54 // ST 050500 1.03bE
55
56
57 // memory useful for backtracking
58
59 protected int exec() {
60 MsgHandler handler = context.MsgHandler();
61 Planner planner = context.Planner();
62 Engine engine = context.Engine();
63
64 GraphStruct gs = (GraphStruct)input;
65 planner.reject(gs.goal,gs.internal);
66 engine.continue_dialogue(gs.key,gs.agent,"refuse",gs.goal);
67 handler.removeRule(gs.key);
68 // send-reject to selected agents
69 DelegationStruct ds;
70 Goal g = (Goal) gs.goal.firstElement();
71 double now = context.now();
72 double ct = g.getConfirmTime().getTime();
73 if ( ct > now ) {
74 for( int i = 0; i < gs.selection.size(); i++ ) {
75 ds = (DelegationStruct)gs.selection.elementAt(i);
76 engine.continue_dialogue(ds.key,ds.agent,"reject-proposal",ds.goals);
77 handler.removeRule(ds.key);
78 }
79 }
80 return OK;
81 }
82 protected void reset() {
83 // reset any state changed by exec()
84 }
85 }