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 package zeus.rete.action;
24 import zeus.rete.*;
25 import zeus.util.*;
26 import zeus.concepts.*;
27 import zeus.concepts.fn.*;
28 import java.util.*;
29 import java.io.*;
30 /***
31
32 @author Simon Thompson
33 @since 1.1
34 */
35 public class PrintlnAction extends ReteAction{
36
37 /***
38
39 */
40 public void executeAction (Action a, Info info) {
41 ValueFunction var = ((ValueFunction)a.head).resolve(info.getBindings());
42 if ( var.getID() != ValueFunction.ID ) {
43 Core.USER_ERROR("Unresolved writer destination '" + var + "' in action " + a);
44 return;
45 }
46 Hashtable writers = conflictHandler.getWriters();
47 PrintWriter out = (PrintWriter)writers.get(((IdFn)var).getValue());
48 if ( out == null ) {
49 Core.USER_ERROR("Unknown writer \'" + var + "' in " + a);
50 return;
51 }
52
53 String output = new String("");
54 String str = new String();
55 for(int j = 0; j < a.items.size(); j++ ) {
56 var = (ValueFunction)a.items.elementAt(j);
57 var = var.resolve(info.getBindings());
58 str = var.toString();
59 str = Misc.literalToString(str);
60 output += str;
61 }
62 out.println(output);
63
64 }
65
66
67 }