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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.concepts.fn.*; 
26  import zeus.concepts.*;
27  import zeus.util.*;
28  import java.util.*;
29  import java.io.*;
30  /*** 
31      
32      @author Simon Thompson
33      @since 1.1
34      */
35  public class  OpenAction 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 == null || var.getID() != ValueFunction.ID ) {
43                   Core.USER_ERROR("Cannot resolve '" + a.head + "' in action " + a);
44                   return;
45                }
46                ValueFunction value = ((ValueFunction)a.sub_head).resolve(info.getBindings());
47                if ( value == null || value.getID() != ValueFunction.ID ) {
48                   Core.USER_ERROR("Cannot resolve '" + a.sub_head + "' in action " + a);
49                   return;
50                }
51                ValueFunction value1 = ((ValueFunction)a.sub_sub_head).resolve(info.getBindings());
52                if ( value == null || value.getID() != ValueFunction.ID ) {
53                   Core.USER_ERROR("Cannot resolve '" + a.sub_sub_head + "' in action " + a);
54                   return;
55                }
56  
57                String logicalName = ((IdFn)var).getValue();
58                String filename = ((IdFn)value).getValue();
59                String mode = ((IdFn)value1).getValue();
60  
61                if ( mode.equalsIgnoreCase("r") )
62                   conflictHandler.createReader(logicalName,filename);
63                else if ( mode.equalsIgnoreCase("w") )
64                   conflictHandler.createWriter(logicalName,filename,false);
65                else if ( mode.equalsIgnoreCase("wa") || mode.equalsIgnoreCase("a") )
66                   conflictHandler.createWriter(logicalName,filename,true);
67                else
68                   Core.USER_ERROR("Unknown mode '" + mode + "' in action " + a);
69      }
70      
71      
72  }