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
23
24 package zeus.actors;
25
26 import java.util.*;
27 import zeus.util.*;
28 import zeus.concepts.*;
29
30
31 public class PreconditionChain {
32 public PlanRecord record = null;
33 public int position = -1;
34 public int amount = -1;
35 public String key = null;
36
37
38 public PreconditionChain () {
39 ;
40 }
41
42
43 public PreconditionChain(PlanRecord record, int position, int amount) {
44 Assert.notNull(record);
45 Assert.notFalse(position > -1);
46 Assert.notFalse(amount > 0);
47 this.record = record;
48 this.position = position;
49 this.amount = amount;
50 }
51 public PreconditionChain(String key, int amount) {
52 Assert.notNull(key);
53 Assert.notFalse(amount > 0);
54 this.key = key;
55 this.amount = amount;
56 }
57 public PreconditionChain(PreconditionChain ch) {
58 if ( ch.isExternal() ) {
59 this.key = ch.key;
60 this.amount = ch.amount;
61 }
62 else {
63 this.record = ch.record;
64 this.position = ch.position;
65 this.amount = ch.amount;
66 }
67 }
68 public boolean isExternal() { return key != null; }
69 public String toString() {
70 String out = "PreconditionChain(";
71 if ( isExternal() )
72 out += key + "," + amount;
73 else
74 out += record + "," + position + "," + amount;
75
76 out += ")";
77 return out;
78 }
79 }